PEN

EX-99.1

2 pen-63026xexhibit991.htm

EX-99.1

Document

Exhibit 99.1

Penumbra, Inc. Reports Second Quarter 2026 Financial Results

ALAMEDA, Calif., July 30, 2026 /PRNewswire/ -- Penumbra, Inc. (NYSE: PEN), the world’s leading thrombectomy company, today reported financial results for the second quarter ended June 30, 2026.

•Revenue of $390.0 million in the second quarter of 2026, an increase of 14.9% compared to the second quarter of 2025.

•Global thrombectomy revenue of $259.0 million in the second quarter of 2026, an increase of 12.5% compared to the second quarter of 2025.

•Global embolization and access revenue of $131.1 million in the second quarter of 2026, an increase of 20.0% compared to the second quarter of 2025.

•Gross profit margin of 67.9% in the second quarter of 2026, an increase of 1.9% compared to the second quarter of 2025.

•Total operating expenses of $223.9 million in the second quarter of 2026, comprised of R&D of $25.4 million and SG&A of $198.5 million, which includes $6.9 million of acquisition-related expenses associated with the pending acquisition of Penumbra, Inc. by Boston Scientific Corporation.

•Income from operations of $41.0 million and net income of $34.8 million in the second quarter of 2026.

Full Year 2026 Financial Outlook and Webcast and Conference Call Information

Given the pending acquisition of Penumbra, Inc. by Boston Scientific Corporation (NYSE: BSX), the Company will not be providing financial guidance for the full year 2026 or hosting a conference call to discuss financial results for the three months ended June 30, 2026.

About Penumbra

Penumbra, Inc., the world’s leading thrombectomy company, is focused on developing the most innovative technologies for challenging medical conditions such as ischemic stroke, venous thromboembolism such as pulmonary embolism, and acute limb ischemia. Our broad portfolio, which includes computer assisted vacuum thrombectomy (CAVT), centers on removing blood clots from head-to-toe with speed, safety and simplicity. By pioneering these innovations, we support healthcare providers, hospitals and clinics in more than 100 countries, working to improve patient outcomes and quality of life. For more information, visit www.penumbrainc.com and connect on Instagram, LinkedIn, and X.

Forward-Looking Statements

Except for historical information, certain statements in this press release are forward-looking in nature and are subject to risks, uncertainties and assumptions about us. Our business and operations are subject to a variety of risks and uncertainties and, consequently, actual results may differ materially from those projected by any forward-looking statements. Factors that could cause actual results to differ from those projected include, but are not limited to: the risk that the pending acquisition by Boston Scientific Corporation will not be completed in the expected timeframe or at all, including the risk that required regulatory approvals will not be obtained; potential adverse effects to our business during the pendency of the acquisition, such as employee departures or diversion of management’s attention from our business; failure to sustain or grow profitability or generate positive cash flows; failure to effectively introduce and market new products; delays in product introductions; significant competition; inability to further penetrate our current customer base, expand our user base and increase the frequency of use of our products by our customers; inability to achieve or maintain satisfactory pricing and margins; manufacturing difficulties; permanent write-downs or write-offs of our inventory or other assets; product defects or failures; unfavorable outcomes in clinical trials; inability to maintain our culture as we grow; fluctuations in foreign currency exchange rates; potential adverse regulatory actions; and the potential impact of any acquisitions, mergers, dispositions, joint ventures or investments we may make. These risks and uncertainties, as well as others, are discussed in greater detail in our filings with the Securities and Exchange Commission ("SEC"), including our Annual Report on Form 10-K for the year ended December 31, 2025 filed with the SEC on February 25, 2026. There may be additional risks of which we are not presently aware or that we currently believe are immaterial which could have an adverse impact on our business. Any forward-looking statements are based on our current expectations, estimates and assumptions regarding future events and are applicable only as of the

1

dates of such statements. We make no commitment to revise or update any forward-looking statements in order to reflect events or circumstances that may change.

2

Penumbra, Inc.

Condensed Consolidated Balance Sheets

(unaudited)

(in thousands)

June 30, 2026December 31, 2025

Assets

Current assets:

Cash and cash equivalents$205,271 $186,897

Marketable investments453,524 357,919

Accounts receivable, net 190,407 19

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pen-202602250001321732FALSE00013217322026-02-202026-02-20

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

February 25, 2026 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On February 25, 2026, Penumbra, Inc. issued a press release announcing financial results for the fourth fiscal quarter and year ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated February 25, 2026. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: February 25, 2026By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

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NYSE

0001321732

2026-01-14 2026-01-14

iso4217:USD

xbrli:shares

iso4217:USD

xbrli:shares

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): January 14, 2026

Penumbra, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware 001-37557 05-0605598

(State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification Number)

One Penumbra Place

Alameda, CA 94502

(Address of Principal Executive Offices)

(510) 748-3200

Registrant’s Telephone Number, Including Area Code

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☒Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, Par value $0.001 per share PEN The New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.01.Entry Into a Material Definitive Agreement.

Agreement and Plan of Merger

On January 14, 2026, Penumbra, Inc., a Delaware corporation (the “Company”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) among the Company, Boston Scientific Corporation, a Delaware corporation (“Parent”), and Pinehurst Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Parent (“Merger Sub”), pursuant to which Merger Sub will merge with and into the Company (the “Merger”), with the Company surviving as a wholly owned subsidiary of Parent. Capitalized terms used but not defined herein shall the meanings given to them in the Merger Agreement.

Merger Consideration

Subject to the terms and conditions set forth in the Merger Agreement, at the effective time of the Merger (the “Effective Time”), each share of common stock of the Company, par value $0.001 per share (collectively, the “Common Shares”) outstanding immediately prior to the Effective Time (but excluding Canceled Shares and Dissenting Shares) would be canceled and converted automatically into the right to receive, at the election of the holder thereof in accordance with, and subject to the terms, conditions and procedures set forth in Article II of the Merger Agreement, the following consideration (the “Merger Consideration”), in each case, without interest: (i) for each Common Share with respect to which an election to receive shares of common stock, par value $0.01 per share, of Parent (the “Parent Shares” and such election, a “Stock Election”) has been effectively made and not revoked, 3.8721 fully paid and non-assessable Parent Shares (the “Stock Consideration”); (ii) for each Common Share with respect to which an election to receive cash (a “Cash Election”) has been effectively made and not revoked, $374.00 in cash, without interest (the “Cash Consideration”); and (iii) for each Common Share other than Common Share as to which a Stock Election or a Cash Election has been effectively made and not revoked, the right to receive such Merger Consideration as is determined in accordance with Article II of the Merger Agreement, in each case of (i) through (iii) above, subject to the proration adjustments set forth in Section 2.02 of the Merger Agreement, such that the total number of Common Shares that shall be entitled to receive the Cash Consideration shall be equal to 73.26% of the aggregate number of Common Shares issued and outstanding immediately prior to the Effective Time (other than Cancelled Shares and Dissenting Shares), and the total number of Common Shares that shall be entitled to receive the Stock Consideration shall be equal to 26.74% of the aggregate number of Common Shares issued and outstanding immediately prior to the Effective Time (other than Cancelled Shares and Dissenting S

pen-202511050001321732FALSE00013217322025-11-052025-11-05

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

November 5, 2025 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On November 5, 2025, Penumbra, Inc. issued a press release announcing financial results for the third fiscal quarter ended September 30, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated November 5, 2025. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: November 5, 2025By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202507290001321732FALSE00013217322025-07-292025-07-29

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

July 29, 2025 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On July 29, 2025, Penumbra, Inc. issued a press release announcing financial results for the second fiscal quarter ended June 30, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated July 29, 2025. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: July 29, 2025By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202504230001321732FALSE00013217322025-04-232025-04-23

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

April 23, 2025 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On April 23, 2025, Penumbra, Inc. issued a press release announcing financial results for the first fiscal quarter ended March 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated April 23, 2025. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: April 23, 2025By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202502180001321732FALSE00013217322025-02-182025-02-18

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

February 18, 2025 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On February 18, 2025, Penumbra, Inc. issued a press release announcing financial results for the fourth fiscal quarter and year ended December 31, 2024. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated February 18, 2025. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: February 18, 2025By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202410300001321732FALSE00013217322024-10-302024-10-30

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

October 30, 2024 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On October 30, 2024, Penumbra, Inc. issued a press release announcing financial results for the third fiscal quarter ended September 30, 2024. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated October 30, 2024. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: October 30, 2024By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202407300001321732FALSE00013217322024-07-302024-07-30

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

July 30, 2024 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On July 30, 2024, Penumbra, Inc. issued a press release announcing financial results for the second fiscal quarter ended June 30, 2024. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated July 30, 2024. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: July 30, 2024By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202405070001321732FALSE00013217322024-05-072024-05-07

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

May 7, 2024 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On May 7, 2024, Penumbra, Inc. issued a press release announcing financial results for the first fiscal quarter ended March 31, 2024. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated May 7, 2024. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: May 7, 2024By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202402220001321732FALSE00013217322024-02-222024-02-22

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

February 22, 2024 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On February 22, 2024, Penumbra, Inc. issued a press release announcing financial results for the fourth fiscal quarter and year ended December 31, 2023. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated February 22, 2024. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: February 22, 2024By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202311020001321732FALSE00013217322023-11-022023-11-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

November 2, 2023 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On November 2, 2023, Penumbra, Inc. issued a press release announcing financial results for the third fiscal quarter ended September 30, 2023. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated November 2, 2023. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: November 2, 2023By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202308010001321732FALSE00013217322023-08-012023-08-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

August 1, 2023 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On August 1, 2023, Penumbra, Inc. issued a press release announcing financial results for the second fiscal quarter ended June 30, 2023. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated Aug. 1, 2023. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: August 1, 2023By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202305020001321732FALSE00013217322023-05-022023-05-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

May 2, 2023 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On May 2, 2023, Penumbra, Inc. issued a press release announcing financial results for the first fiscal quarter ended March 31, 2023. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated May 2, 2023. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: May 2, 2023By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202302230001321732FALSE00013217322023-02-232023-02-23

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

February 23, 2023 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On February 23, 2023, Penumbra, Inc. issued a press release announcing financial results for the fourth fiscal quarter and year ended December 31, 2022. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated February 23, 2023. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: February 23, 2023By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202211030001321732FALSE00013217322022-08-042022-08-04

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

November 3, 2022 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On November 3, 2022, Penumbra, Inc. issued a press release announcing financial results for the third fiscal quarter ended September 30, 2022. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated November 3, 2022. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: November 3, 2022By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202208040001321732FALSE00013217322022-08-042022-08-04

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

August 4, 2022 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On August 4, 2022, Penumbra, Inc. issued a press release announcing financial results for the second fiscal quarter ended June 30, 2022. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated August 4, 2022. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: August 4, 2022By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202205030001321732FALSE00013217322022-05-032022-05-03

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

May 3, 2022 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On May 3, 2022, Penumbra, Inc. issued a press release announcing financial results for the first fiscal quarter ended March 31, 2022. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated May 3, 2022. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: May 3, 2022By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer

pen-202202220001321732FALSE00013217322022-02-222022-02-22

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

February 22, 2022 Date of Report (Date of earliest event reported)

Penumbra, Inc. (Exact name of registrant as specified in its charter)

Delaware001-3755705-0605598 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. employer identification number)

One Penumbra Place Alameda, CA 94502 (Address of principal executive offices, including zip code)

(510) 748-3200 (Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligations of the registrant under any of the following provisions: ☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, Par value $0.001 per sharePENThe New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02.Results of Operations and Financial Condition.

On February 22, 2022, Penumbra, Inc. issued a press release announcing financial results for the fourth fiscal quarter and year ended December 31, 2021. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information furnished on this Current Report on Form 8-K, including the attached exhibit, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such a filing, except as expressly set forth by specific reference in such a filing.

Item 9.01.Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number Description 99.1 Press release of Penumbra, Inc. dated February 22, 2022. 104Cover Page Interactive Data File (formatted as Inline Extensible Business Reporting Language).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Penumbra, Inc.

Date: February 22, 2022By:/s/ Maggie Yuen Maggie Yuen Chief Financial Officer