427 material Form 8-K filings that 376 companies we cover made with the SEC in September 2025, each read and summarized by AI: what happened, the key figures, whether it reads positive or negative for shareholders, and how big a deal it is (impact 1-5). All of them were written later, when past filings were added: a selection, not every 8-K of the month (see the note below).
MarineMax, Inc. (NYSE: HZO) said Michael H. McLamb resigned from its Board effective immediately on September 25, 2025, and the Board appointed Daniel Schiappa as a director and Audit Committee member the same day. McLamb remains the company's Executive Vice President and Chief Financial Officer, and the Board will still have eight directors. The filing reports no financial results or guidance, so the change is a governance update rather than a change in company performance.
Michael H. McLamb resigned from the Board effective immediately on September 25, 2025; the filing says the resignation was not due to any disagreement with the company.
Daniel Schiappa was appointed to the Board and Audit Committee on September 25, 2025, as an independent Class I director with a term expiring in 2026.
Schiappa will receive an initial option to acquire 5,000 shares of common stock as soon as reasonably practicable after his appointment.
McLamb continues as Executive Vice President and Chief Financial Officer; the Board will consist of eight directors.
SolarEdge Technologies said director Nadav Zafrir resigned from its Board of Directors, effective October 2, 2025, and that the resignation was not due to any disagreement with the company on its operations, policies or practices. The board reduced its size to seven directors, effective the same date.
Nadav Zafrir notified the board of his resignation on September 29, 2025, effective October 2, 2025
The company states the resignation was not due to any disagreement on operations, policies or practices
On September 30, 2025, the board fixed its size at seven directors, effective October 2, 2025
SLM Corporation entered a retention agreement with Executive Vice President and Chief Commercial Officer Donna F. Vieira, who will resign as Chief Commercial Officer by December 31, 2025 and retire as an employee by April 3, 2026. She will receive a $750,000 cash retention bonus if she meets the agreement's conditions, which matters to shareholders because it sets the timeline for a senior commercial leadership change.
Vieira resigns as Chief Commercial Officer on the Transition Date, no later than December 31, 2025, unless the company sets an earlier date to hire a successor
Retention Bonus of $750,000, payable subject to continued performance and transition assistance through the Separation Date
Retirement as an employee on April 3, 2026; she is not entitled to severance under the Severance Plan
Genpact appointed Anthony Radesca as Senior Vice President and Chief Accounting Officer, effective September 29, 2025. He previously held the same title at NCR Voyix from May 2024 to September 2025, and the filing discloses no financial terms beyond standard salary, bonus and equity eligibility.
Anthony Radesca named Senior Vice President and Chief Accounting Officer, effective September 29, 2025
Previously Senior Vice President and Chief Accounting Officer at NCR Voyix Corporation, May 2024 to September 2025
Earlier served as Chief Accounting Officer at EVO Payments (2019 to 2023) and CA Technologies (2016 to 2019)
Compensation includes base salary, annual bonus opportunities and equity awards; no specific amounts disclosed
Somnigroup International's Board increased its size from seven to eight members and appointed Christopher T. Cook as an independent director, effective September 30, 2025. Mr. Cook founded Sleep Experts, a mattress retail chain, and previously served on the Mattress Firm board, which Somnigroup acquired in 2025. The filing describes a routine board addition with no financial terms disclosed.
Board expanded from seven to eight members effective September 30, 2025
Christopher T. Cook named independent director; term runs to the 2026 Annual Meeting of Stockholders
Cook receives a pro rata director equity award and standard non-employee director compensation
Apollo Global Management disclosed that board member Pauline Richards notified the company on September 29, 2025, that she will resign from the Board effective September 30, 2025. The filing states her resignation was not the result of any disagreement with management or the Board.
Pauline Richards notified Apollo on September 29, 2025 of her decision to resign as a board member.
Resignation is effective September 30, 2025.
The filing states the resignation was not due to any disagreement with management or the Board.
Five9 disclosed that director David Welsh resigned from its board on September 26, 2025, with no disagreement with the company cited, and that the board appointed Sudhakar Ramakrishna, CEO and President of SolarWinds, as a new director. Robert Zollars became Lead Independent Director, and board committee chairs were reassigned. The changes are governance updates that do not include any financial results or guidance.
David Welsh resigned as a Class II director, as Lead Independent Director and as chair of the Nominating and Governance Committee, effective September 26, 2025
Sudhakar Ramakrishna was appointed to the board on September 26, 2025 as a Class II director with a term expiring at the 2028 annual meeting and joined the Nominating and Governance Committee
Robert Zollars became Lead Independent Director, Jonathan Mariner chairs the Nominating and Governance Committee, and Michael Burdiek chairs the Compensation Committee
Hanmi Financial Corporation appointed Daniel J. Medici, a retired federal bank examiner with over 36 years at the Office of the Comptroller of the Currency, to the boards of Hanmi Financial and Hanmi Bank effective October 1, 2025. The addition brings the Hanmi board to twelve directors, and Mr. Medici joins the Audit and Risk, Compliance and Planning committees. The filing describes this as a governance addition focused on IT, cybersecurity and risk oversight, with no financial terms disclosed.
Daniel J. Medici appointed to Hanmi Financial and Hanmi Bank boards, effective October 1, 2025
Board size increases to twelve directors
Committee roles: Audit, Risk, Compliance and Planning, and Bank Loan and Credit Policy Committee
Retired from the Office of the Comptroller of the Currency in February 2025 after over 36 years
Prudential Financial said its board elected Joseph J. Wolk as an independent director effective September 30, 2025. Wolk is currently executive vice president and chief financial officer at Johnson & Johnson, and he will serve on the board's Audit and Finance Committees.
Joseph J. Wolk elected as independent director effective September 30, 2025
Appointed to the Audit Committee and Finance Committee
Wolk is executive vice president and CFO at Johnson & Johnson, a role he has held since his 2018 appointment as CFO
Wolk will receive non-employee director compensation under the summary filed with the 2024 Form 10-K
Dana's Chairman and CEO R. Bruce McDonald has signed an amended employment agreement that extends his role as CEO month to month until a successor starts, after which he would become Non-Executive Chairman. The board says the successor search will accelerate in early 2026, and the Off Highway divestiture is expected to close late in the fourth quarter of 2025.
Agreement signed September 29, 2025; base salary remains $1,300,000 while he serves as CEO
Target equity grants total $9,900,000 in restricted stock units, with $4,125,000 granted at the agreement's effective date
Eligible for a cash transition bonus of up to $500,000, based on finding and transitioning a successor by the April 2026 annual meeting
Matador Resources promoted Robert T. Macalik to Executive Vice President and Chief Financial Officer effective September 29, 2025, succeeding William D. Lambert, who ceased serving as CFO on September 24, 2025. The company said Lambert's departure is not related to any financial or accounting issue or any disagreement with the company. Macalik will also remain CFO of midstream joint venture San Mateo Midstream, LLC.
Robert T. Macalik promoted to EVP and CFO, effective September 29, 2025.
William D. Lambert ceased serving as CFO on September 24, 2025; company says the departure is not related to any financial or accounting issue or disagreement.
Macalik joined Matador in July 2015 as Vice President and Chief Accounting Officer and most recently served as EVP – Administration and Finance.
Macalik entered an employment agreement with MRC Energy Company, a wholly-owned subsidiary, effective September 29, 2025.
Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.
Briefs marked “Written later” were written in November 2026 for filings that were by then more than three weeks old, so months before mid-October 2026 hold a selection: every material 8-K of the past year for the 100 largest companies we cover and the last 15 important 8-Ks of every other one. Briefs the number check holds back are not shown or counted. Also: the last 45 days, briefs by company, A–Z and the live SEC filings wire.