SGU

EX-99.1

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EXHIBIT 99.1

EdgarFiling

EXHIBIT 99.1

Star Group, L.P. Reports Fiscal 2026 Second Quarter Results

STAMFORD, Conn., May 06, 2026 (GLOBE NEWSWIRE) -- Star Group, L.P. (the "Company" or "Star") (NYSE:SGU), a home energy distributor and services provider, today filed its quarterly report on Form 10-Q with the SEC and announced financial results for the fiscal 2026 second quarter, the three months ended March 31, 2026.

Three Months Ended March 31, 2026 Compared to the Three Months Ended March 31, 2025 For the fiscal 2026 second quarter, Star reported a 3.2 percent increase in total revenue to $766.7 million compared with $743.0 million in the prior-year period, reflecting higher heating oil and propane volumes sold. The amount of home heating oil and propane sold during the fiscal 2026 second quarter rose by 0.6 million gallons, or 0.4 percent, to 144.5 million gallons, as the additional volume provided from acquisitions and colder temperatures, more than offset the impact of net customer attrition and other factors. Temperatures in Star's geographic areas of operation for the three months ended March 31, 2026 were 6.4 percent colder than the three months ended March 31, 2025 and 2.8 percent colder than normal, as reported by the National Oceanic and Atmospheric Administration.

Star’s net income rose by $22.4 million in the quarter, to $108.3 million, primarily due to a favorable change in the fair value of derivative instruments of $20.7 million, a $10.5 million increase in Adjusted EBITDA, a $0.6 million decrease in depreciation and amortization expense, and $0.4 million lower net interest expense, partially offset by a $9.7 million increase in income tax expense.

The Company reported second quarter Adjusted EBITDA (a non-GAAP measure defined below) of $138.7 million, up $10.5 million year-over-year, primarily due to a $5.3 million increase in Adjusted EBITDA in the base business, $2.1 million higher Adjusted EBITDA from recent acquisitions, and a $3.1 million decrease in expense related to the Company's weather hedge contracts. The increase in Adjusted EBITDA in the base business was driven by the higher home heating oil and propane volume, due to colder weather, an increase in home heating oil and propane per gallon margins, and higher installation profitability, partially offset by an increase in operating expenses. While home heating oil and propane volume grew by just 0.4 percent during this period, the extreme weather conditions significantly impacted direct operating costs, which rose by $4.0 million, or 5.9 percent; insurance expense also increased by $4.0 million largely due to higher claims expense attributable to the weather. At the same time, the Company did not recognize any expense or benefit under its weather hedge contracts in the second quarter of fiscal 2026 (versus a $3.1 million expense recorded for the three months ended March 31, 2025) due to the fact that Star already recognized the cap of $5.0 million expense under its weather hedge contracts during the first quarter.

“The second quarter was, in many ways, a continuation of conditions experienced in the first. Colder temperatures were the norm across much of our operating footprint, resulting in slightly higher heating oil and propane volumes sold, but the severe weather – including storms and high snowfall – also raised operating expenses,” said Jeff Woosnam, Star Group’s President and Chief Executive Officer. “That said, we were still able to post Adjusted EBITDA of nearly $139 million and kept net customer attrition under 1 percent -- both important accomplishments for the Company. We also closed on one small heating oil acquisition during the quarter. Given the challenges of this past winter, we’re very pleased with how the team performed and are working on continued improvement to our underlying operations in the second half.”

Six Months Ended March 31, 2026 Compared to the Six Months Ended March 31, 2025 For the six months ended March 31, 2026, Star reported a 6.1 percent increase in total revenue to $1.3 billion, reflecting higher product volumes sold and an increase in selling prices in response to higher wholesale product costs. The volume of home heating oil and propane sold during the first six months of fiscal 2026 increased by 12.1 million gallons, or 5.3 percent, to 238.4 million gallons, reflecting colder temperatures and the additional volume provided from acquisitions, more than offsetting net customer attrition and other factors. Temperatures in Star’s geographic areas of operation fiscal year-to-date were 11.0 percent colder than during the prior-year period and 4.1 percent colder than normal, as reported by the National Oceanic and Atmospheric Administration.

For the six months ended March 31, 2026, Star’s net income increased $25.3 million, to $144.1 million, compared to the prior-year period, primarily due to a $27.0 million increase in Adjusted EBITDA and a favorable change in the

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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 4, 2026

STAR GROUP, L.P.

(Exact name of registrant as specified in its charter)

Delaware 001-14129 06-1437793

(State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.)

9 West Broad Street, Suite 310

Stamford, CT 06902

(Address of Principal Executive Offices) (Zip Code)

(203) 328-7310

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

Common Units SGU New York Stock Exchange

Common Unit Purchase Rights N/A 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 2.02. Results of Operations and Financial Condition.

On February 4, 2026, Star Group, L.P., a Delaware partnership, issued a press release announcing its financial results for the fiscal first quarter ended December 31, 2025. A copy of the press release is furnished within this report as Exhibit 99.1.

The information in this report is being furnished and is not deemed as "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed incorporated by reference in any filings under the Securities Act of 1933, as amended, unless specifically stated so therein.

Item 7.01. Regulation FD Disclosure.

Item 9.01. Financial Statements and Exhibits.

Exhibit 99.1 A copy of the Star Group, L.P. Press Release dated February 4, 2026

Exhibit 104 Cover Page Interactive Data File (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.

STAR GROUP, L.P.

By: Kestrel Heat, LLC (General Partner)

Date: February 4, 2026 By: /s/ Richard F. Ambury

Richard F. Ambury

Chief Financial Officer

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2025-12-08 2025-12-08

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2025-12-08 2025-12-08

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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): December 8, 2025

STAR

GROUP, L.P.

(Exact name of registrant as specified in its charter)

Delaware 001-14129 06-1437793

(State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.)

9 West Broad Street, Suite 310

Stamford, CT 06902

(Address of Principal Executive Offices) (Zip Code)

(203) 328-7310

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

Common Units SGU New York Stock Exchange

Common Unit Purchase Rights N/A 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 2.02. Results of Operations and Financial Condition.

On December 8, 2025, Star Group, L.P., a Delaware partnership, issued a press release announcing its financial results for the fiscal fourth quarter and year ended September 30, 2025. A copy of the press release is furnished within this report as Exhibit 99.1.

The information in this report is being furnished and is not deemed as "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed incorporated by reference in any filings under the Securities Act of 1933, as amended, unless specifically stated so therein.

Item 7.01. Regulation FD Disclosure.

Item 9.01. Financial Statements and Exhibits.

Exhibit 99.1

A copy of the Star Group, L.P. Press Release dated December 8, 2025

Exhibit 104 Cover Page Interactive Data File (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.

STAR GROUP, L.P.

By: Kestrel Heat, LLC (General Partner)

Date: December 8, 2025 By: /s/ Richard F. Ambury

Richard F. Ambury

Chief Financial Officer