AVTR

EX-99.1

2 a2026q3earningsreleaseex991.htm

EX-99.1

Document

Exhibit 99.1

Avantor® Reports Third Quarter 2026 Results

•Net sales of $1,698.3 million; increase of 4.6%; organic increase of 5.2%

•Diluted GAAP EPS of $0.30; adjusted EPS of $0.22

•Raised FY 2026 organic revenue growth, adjusted EPS and free cash flow guidance

RADNOR, Pa. – October 28, 2026 –Avantor, Inc. (NYSE: AVTR), a leading global provider of mission-critical products and services to customers in the life sciences and advanced technology industries, reports results that exceeded management’s expectations for revenue and adjusted EPS for the third fiscal quarter of 2026.

Emmanuel Ligner, President and Chief Executive Officer, says: “We are delighted to return to year-over-year growth in the third quarter. We are not done with our Revival journey yet, but this achievement reflects the dedication of our associates and the progress we are making to sharpen our strategic focus and improve execution. Third quarter results exceeded our expectations across revenue and adjusted EPS, and we generated robust free cash flow that allowed us to further strengthen our balance sheet.

“VWR Distribution & Services delivered another quarter of improving revenue performance, with organic growth accelerating to 5.8%, and Bioscience & Medtech Products returned to organic growth as expected. We believe that improving execution and stronger end markets provide a foundation for sustained revenue growth, and we remain focused on execution to build on our positive momentum,” Ligner concludes.

Third Quarter 2026

For the three months ended September 30, 2026, net sales were $1,698.3 million, which was up 4.6% compared to the third quarter of 2025. Foreign currency translation had a negative impact of 0.6%, resulting in a 5.2% increase in net sales on an organic basis.

Net income increased to $203.4 million from a net loss of $711.8 million in the third quarter of 2025, and net income margin was 12.0%; adjusted net income was $146.4 million compared to $151.1 million in the prior-year period. Adjusted EBITDA was $256.9 million, with an adjusted EBITDA margin of 15.1%.

Operating income was $139.5 million, with an operating income margin of 8.2%; adjusted operating income was $227.6 million, with an adjusted operating income margin of 13.4%.

Diluted earnings per share on a GAAP basis was $0.30, and adjusted diluted earnings per share was $0.22.

Third Quarter 2026 – Segment Results

VWR Distribution & Services

•Net sales were $1,233.8 million, a reported increase of 5.0%, as compared to $1,175.0 million in the third quarter of 2025. Foreign currency translation had a negative impact of 0.8%, resulting in a sales increase of 5.8% on an organic basis.

•Adjusted Operating Income was $119.4 million as compared to $132.0 million in the comparable prior period. Adjusted Operating Income margin was 9.7%. Adjusted Operating Income margin declined versus the prior year due to unfavorable product mix and higher SG&A expenses, partially offset by higher sales volume.

Bioscience & Medtech Products

•Net sales were $464.5 million, a reported increase of 3.5%, as compared to $448.8 million in the third quarter of 2025. Foreign currency translation had a negative impact of 0.1%, resulting in a 3.6% sales increase on an organic basis.

•Adjusted Operating Income was $123.4 million, as compared to $119.3 million in the comparable prior period. Adjusted Operating Income margin was 26.6%. Adjusted Operating Income margin was flat versus the prior year due to higher sales volume and commercial excellence, partially offset by higher SG&A expenses.

Adjusted Operating Income is Avantor's segment reporting profitability measure under generally accepted accounting principles and is used by management to measure and evaluate the performance of our Company’s business segments.

Balance Sheet and Cash Flow

As of September 30, 2026, total debt, gross, was $3,699.7 million and cash and cash equivalents were $464.3 million.

GAAP net leverage was 9.6x, and adjusted net leverage was 3.1x, as of September 30, 2026.

For the three months ended September 30, 2026, operating cash flow was $195.1 million, while free cash flow was $156.2 million.

Updated 2026 Guidance

Avantor updates its fiscal 2026 financial guidance.

Fiscal 2026 guidance (as of July 29, 2026)Updated Fiscal 2026 guidance (as of October 28, 2026)

Organic revenue growth (1) -0.5% to +0.5%+0.75% to +1.25%

Adjusted EBITDA margin (1) 14.8% to 15.3%14.8% to 15.3%

Adjusted EPS (1) $0.80 to $0.83$0.81 to $0.83

Free cash flow (1)(2) $500M to $550M$525M to $550M

(1)Non-GAAP measure (definitions and/or reconciliations below). We are unable to provide a reconciliation of the non-GAAP measures provided in our full-year 2026 guidance without unreasonable effort because of the difficulty in forecasting and quantifying certain amounts and adjustment items with a reasonable degree of certainty including net income, restructuring char

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avtr-20260211false000172248200017224822026-02-112026-02-110001722482us-gaap:CommonStockMember2026-02-112026-02-11

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): February 11, 2026

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On February 11, 2026, Avantor, Inc. (the “Company”) issued a press release announcing its financial results for the quarter and year ended December 31, 2025, as well as a realignment of its reportable business segments. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. Item 7.01. Regulation FD Disclosure. On February 11, 2026, the Company issued the press release described in Item 2.02 above, which also announced a realignment of the Company’s reportable business segments. The Company will hold a conference call to discuss these developments and its financial results for the quarter and year ended December 31, 2025 at 8:00 a.m. ET on February 11, 2026. Effective in the first quarter of 2026, the Company is realigning its business units into two reportable segments: VWR Distribution & Services and Bioscience & Medtech Products. To assist investors in understanding the effects of these segment reporting changes on the Company’s historical results, the Company is furnishing herewith as Exhibit 99.2 unaudited supplemental recast financial information for each quarter of fiscal year 2025 and for the fiscal years ended December 31, 2023, 2024, and 2025, reflecting the segment changes described above. The revised segment reporting will be reflected in the Company’s financial statements beginning with its Quarterly Report on Form 10‑Q for the quarter ending March 31, 2026. The information in this Item 2.02 and Item 7.01 of this Current Report on Form 8‑K, including Exhibits 99.1 and 99.2, is being “furnished” pursuant to the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section, nor shall it be incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Avantor, Inc. Earnings Press Release dated February 11, 2026

99.2 Unaudited Supplemental Summary Financial Information

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: February 11, 2026By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President and Chief Accounting Officer (Principal Accounting Officer)

avtr-20251029false000172248200017224822025-10-292025-10-29

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 Date of Report (Date of earliest event reported): October 29, 2025

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On October 29, 2025, Avantor, Inc. issued a press release announcing its financial results for the quarter ended September 30, 2025. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated October 29, 2025

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: October 29, 2025By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20250801false000172248200017224822025-08-012025-08-01

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 Date of Report (Date of earliest event reported): August 1, 2025

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On August 1, 2025, Avantor, Inc. issued a press release announcing its financial results for the quarter ended June 30, 2025. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated August 1, 2025

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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 Avantor, Inc.

Date: August 1, 2025By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20250425false000172248200017224822025-04-252025-04-25

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): April 25, 2025

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On April 25, 2025, Avantor, Inc. issued a press release announcing its financial results for the quarter ended March 31, 2025. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated April 25, 2025

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: April 25, 2025By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20250207false000172248200017224822025-02-072025-02-070001722482us-gaap:CommonStockMember2025-02-072025-02-07

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 Date of Report (Date of earliest event reported): February 7, 2025

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On February 7, 2025, Avantor, Inc. (“Avantor”) issued a press release announcing its financial results for the quarter and year ended December 31, 2024. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Avantor, Inc. Earnings Press Release dated February 7, 2025

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: February 7, 2025By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President and Chief Accounting Officer (Principal Accounting Officer)

avtr-20241025false000172248200017224822024-10-252024-10-25

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): October 25, 2024

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On October 25, 2024, Avantor, Inc. issued a press release announcing its financial results for the quarter ended September 30, 2024. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated October 25, 2024

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: October 25, 2024By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20240726false000172248200017224822024-07-262024-07-26

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): July 26, 2024

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On July 26, 2024, Avantor, Inc. issued a press release announcing its financial results for the quarter ended June 30, 2024. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated July 26, 2024

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: July 26, 2024By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20240426false000172248200017224822024-04-262024-04-26

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): April 26, 2024

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On April 26, 2024, Avantor, Inc. issued a press release announcing its financial results for the quarter ended March 31, 2024. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated April 26, 2024

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: April 26, 2024By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20240214false000172248200017224822024-02-142024-02-140001722482us-gaap:CommonStockMember2024-02-142024-02-14

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): February 14, 2024

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On February 14, 2024, Avantor, Inc. (“Avantor”) issued a press release announcing its financial results for the quarter and year ended December 31, 2023. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. Item 7.01. Regulation FD Disclosure. As previously disclosed in the Current Report on Form 8-K filed with the Securities and Exchange Commission (“SEC”) on December 7, 2023, Avantor is realigning its business units, effective the first quarter of 2024, into two reportable business segments: Laboratory Solutions and Bioscience Production. To assist investors who may want to consider the effects of these segment reporting changes on Avantor’s historical results, Avantor is furnishing herewith as Exhibit 99.2 unaudited supplemental recast financial information for each quarter of fiscal years 2022 and 2023 and for the fiscal years ended December 31, 2021, 2022, and 2023 that reflects the segment changes described above. The changes to Avantor’s segment reporting will be reflected in Avantor’s financial statements commencing with the first Quarterly Report of 2024 on Form 10-Q. The information contained in this Current Report on Form 8-K, including Exhibit 99.1 and Exhibit 99.2, is being “furnished” pursuant to the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and thus shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act or otherwise subject to the liabilities of that section or incorporated by reference into any filings under the Securities Act of 1933, as amended. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Avantor, Inc. Earnings Press Release dated February 14, 2024

99.2 Unaudited Supplemental Summary Financial Information

104The cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURE

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. Avantor, Inc.

Date: February 14, 2024By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President and Chief Accounting Officer (Principal Accounting Officer)

avtr-20231027false000172248200017224822023-10-272023-10-27

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): October 27, 2023

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On October 27, 2023, Avantor, Inc. issued a press release announcing its financial results for the quarter ended September 30, 2023. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated October 27, 2023

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: October 27, 2023By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20230728false000172248200017224822023-07-282023-07-280001722482us-gaap:CommonStockMember2023-07-282023-07-28

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): July 28, 2023

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On July 28, 2023, Avantor, Inc. issued a press release announcing its financial results for the quarter ended June 30, 2023. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated July 28, 2023

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: July 28, 2023By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20230428false000172248200017224822023-04-282023-04-280001722482us-gaap:CommonStockMember2023-04-282023-04-28

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): April 28, 2023

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On April 28, 2023, Avantor, Inc. issued a press release announcing its financial results for the quarter ended March 31, 2023. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated April 28, 2023

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: April 28, 2023By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20230203false000172248200017224822023-02-032023-02-030001722482us-gaap:CommonStockMember2023-02-032023-02-03

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 Date of Report (Date of earliest event reported): February 3, 2023

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On February 3, 2023, Avantor, Inc. issued a press release announcing its financial results for the quarter and year ended December 31, 2022. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated February 3, 2023

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document

SIGNATURE

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. Avantor, Inc.

Date: February 3, 2023By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20221028false000172248200017224822022-10-282022-10-280001722482us-gaap:CommonStockMember2022-10-282022-10-28

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): October 28, 2022

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On October 28, 2022, Avantor, Inc. issued a press release announcing its financial results for the quarter ended September 30, 2022. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated October 28, 2022

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: October 28, 2022By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20220728false000172248200017224822022-07-282022-07-280001722482us-gaap:CommonStockMember2022-07-282022-07-28

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): July 28, 2022

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew 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 2.02    Results of Operations and Financial Condition. On July 28, 2022, Avantor, Inc. issued a press release announcing its financial results for the quarter ended June 30, 2022. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated July 28, 2022

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: July 28, 2022By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20220428false000172248200017224822022-04-282022-04-280001722482us-gaap:CommonStockMember2022-04-282022-04-280001722482us-gaap:PreferredStockMember2022-04-282022-04-28

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): April 28, 2022

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading SymbolExchange on which registered Common Stock, $0.01 par valueAVTRNew York Stock Exchange 6.250% Series A Mandatory Convertible Preferred Stock, $0.01 par valueAVTR PRANew 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 2.02    Results of Operations and Financial Condition. On April 28, 2022, Avantor, Inc. issued a press release announcing its financial results for the quarter ended March 31, 2022. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated April 28, 2022

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document)

SIGNATURE

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. Avantor, Inc.

Date: April 28, 2022By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)

avtr-20220203false00017224822021FY00017224822022-02-032022-02-030001722482us-gaap:CommonStockMember2022-02-032022-02-030001722482us-gaap:PreferredStockMember2022-02-032022-02-03

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 Date of Report (Date of earliest event reported): February 3, 2022

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

Delaware001-3891282-2758923 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

Radnor Corporate Center, Building One, Suite 200 100 Matsonford Road Radnor, Pennsylvania 19087 (Address of principal executive offices, including zip code) (610) 386-1700 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

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 classTrading Symbol(s)Name of each exchange on which registered Common Stock, $0.01 par valueAVTRNew York Stock Exchange 6.250% Series A Mandatory Convertible Preferred Stock, $0.01 par valueAVTR PRANew 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 2.02    Results of Operations and Financial Condition. On February 3, 2022, Avantor, Inc. issued a press release announcing its financial results for the quarter and year ended December 31, 2021. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. The information contained in this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be deemed incorporated by reference in any filing under the Securities Exchange Act of 1933, except as expressly set forth by specific reference in such a filing. Item 9.01    Financial Statements and Exhibits. (d) Exhibits Exhibit No.Description 99.1 Press release dated February 3, 2022

104Cover Page Interactive File (the cover page tags are embedded within the Inline XBRL document

SIGNATURE

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. Avantor, Inc.

Date: February 3, 2022By:/s/ Steven Eck Name:Steven Eck Title:Senior Vice President, Chief Accounting Officer (Principal Accounting Officer)