1,853 material Form 8-K filings that 1,500 companies we cover made with the SEC in September 2026, 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).
Celanese Corporation's Board increased its size from 10 to 11 members and elected Luis Fernandez-Moreno as a director, effective September 16, 2026. The filing describes him as independent under SEC and NYSE standards, with a background in specialty chemicals, and says he has not yet been appointed to any board committee.
Board expanded from 10 to 11 members; Fernandez-Moreno serves until the 2027 Annual Meeting of Shareholders
Board determined he is independent under SEC rules and NYSE listing standards; 10 of 11 directors are independent
Previously served as SVP at Ashland, Inc. (2013-2017) and is a director at Ingevity Corporation since 2016
No committee assignments yet; compensated under the company's non-management director practices
Ernexa Therapeutics appointed Robert J. Spiegel, M.D. as a member of its board of directors, effective immediately, on the recommendation of the Nominating and Corporate Governance Committee. The filing says he will be compensated under the company's board compensation plan and reports no related-party transactions or family relationships with other directors or executives.
Board appointment approved September 14, 2026; effective immediately
Dr. Spiegel's compensation follows the Board of Directors Compensation Plan adopted effective August 15, 2026
Filing reports no reportable transactions with Dr. Spiegel under Item 404(a) of Regulation S-K
AIG said Jon Hancock, Executive Vice President and Chief Executive Officer of General Insurance, will retire and become Senior Advisor effective December 31, 2026. As Senior Advisor he will report to AIG President and CEO Eric Andersen and advise on strategic priorities. The filing describes a planned leadership transition in one business unit rather than a change in financial results.
Jon Hancock, EVP and CEO of General Insurance, will retire and transition to Senior Advisor role
Transition effective December 31, 2026
Hancock will report to Eric Andersen, President & CEO of AIG
Filing cites more than six years in executive roles at AIG and a 40-year insurance career
Capri Holdings announced that Catherine So, previously General Counsel at Tiffany & Co., will join as Chief Legal and Sustainability Officer effective October 19, 2026, reporting to Chairman and CEO John D. Idol. The filing reports no financial results or guidance, so the appointment is an executive leadership change rather than a change to the company's financial outlook.
Catherine So joins from Tiffany & Co., where she was Senior Vice President and General Counsel
Appointment is effective October 19, 2026
She will report to John D. Idol, Chairman and Chief Executive Officer
The filing contains no financial results or guidance
TEN Holdings appointed Yee Won Hiew to its board of directors, filling a seat vacated in May 2026, and placed her on the Audit and Nominating and Corporate Governance Committees. The board also terminated the share repurchase program approved in March 2025 and authorized a new program of up to $2 million in share repurchases, which the company may suspend or end at any time.
Yee Won Hiew appointed effective September 16, 2026, filling the vacancy left by Randolph Wilson Jones III's May 8, 2026 departure
Hiew receives an annual cash retainer of $10,000 as a non-employee director
New repurchase program authorizes up to $2 million of common stock; the prior program approved in March 2025 was terminated
Owens Corning expanded its board from nine to ten directors and elected Michael J. DeVito as a director, effective September 16, 2026. DeVito will join the Audit Committee and the Finance and Technology Committee, and the board determined he is independent.
Board expanded from nine to ten directors; DeVito elected effective September 16, 2026
DeVito was CEO and Executive Director of Freddie Mac from 2021 to 2024
Previously spent 24 years at Wells Fargo, most recently as Executive Vice President and Head of Home Lending
Will join the Audit Committee and Finance and Technology Committee; currently serves on NVR, Inc. board
NIKE's board increased its size to twelve directors and appointed Alexandre Arnault, Deputy CEO of Moët Hennessy at LVMH, as a director effective immediately on September 15, 2026. The filing says his committee assignments have not yet been determined, and he received a $200,000 sign-on award of restricted Class B shares that is forfeitable if he leaves the board before the first anniversary of the grant.
Board expanded to twelve directors; Arnault's initial term runs to the 2027 annual meeting of shareholders
Arnault, 34, has been Deputy CEO of Moët Hennessy since February 2025 and has served on the LVMH board since April 2024
Sign-on award of restricted Class B Common Stock valued at $200,000, granted September 15, 2026
Committee assignments for Arnault have not yet been determined
Selective Insurance Group expanded its board from 12 to 13 members and appointed Wole C. Coaxum as a non-employee director, effective September 16, 2026. He previously served on the board from 2020 to 2025 and joined the Audit Committee and Compensation and Human Capital Committee. The filing describes a board appointment with no financial results, guidance or deal terms included, so it has no direct effect on reported performance.
Board increased from 12 to 13 members; 12 of 13 directors are independent
Coaxum named to the Audit Committee and Compensation and Human Capital Committee
Term runs until the 2027 Annual Meeting of Stockholders; no fiscal 2026 equity award, cash retainer prorated through December 31, 2026
Coaxum is founder and CEO of On Our Block and previously led digital banking platform MoCaFi until its 2026 wind-down
AES disclosed that Bernerd Da Santos, who had moved from President of US & Renewables to Chairman of the AES Clean Energy Board in April 2026, left the company effective September 14, 2026, to become Executive Vice President and Chief Operating Officer at Fluence Energy, Inc. His separation agreement provides severance under the company's executive severance plan, which matters to shareholders because it is a cost tied to a senior leadership departure.
Departure effective September 14, 2026; he accepted a role as EVP and COO at Fluence Energy, Inc.
Severance equal to one times annualized base salary plus annual target bonus for fiscal 2026, plus a pro-rata fiscal 2026 bonus at target performance
He will also receive applicable retirement benefits under company plans; the filing gives no dollar amounts
Full separation agreement to be filed as an exhibit to the Form 10-Q for the quarter ending September 30, 2026
TrustCo Bank Corp NY's board voted unanimously on September 15, 2026 to increase its size from nine to eleven directors and elected Patricia Kieper-Fusco and Bryan L. Guentner to fill the new seats, effective immediately. The filing describes the change as a governance update and does not report any financial results or compensatory equity awards tied to the appointments.
Board expanded from nine to eleven directors; Patricia Kieper-Fusco and Bryan L. Guentner elected effective immediately on September 15, 2026
Both directors also join the board of subsidiary Trustco Bank and were appointed to the Audit, Board Compliance, Compensation, Fiduciary, Nominating and Corporate Governance, and Risk Committees
Board found both directors independent under Nasdaq standards; no equity awards made in connection with their elections
On September 15, 2026, Nelnet's board increased its size from eight to ten members and appointed Angela Klein and Edward Pallesen as independent directors. The company will pay their pro rata director retainers in Class A common stock, about $141,000 and $133,000, through its 2027 annual meeting.
Board increased from eight to ten members on September 15, 2026.
Angela Klein appointed Class III director with a term expiring at the 2029 annual meeting; Edward Pallesen appointed Class II director with a term expiring at the 2028 annual meeting.
Pro rata retainers of approximately $141,000 (Klein) and $133,000 (Pallesen) paid in Class A stock under the Directors Stock Compensation Plan.
Avalyn Pharma's board appointed Robert Meyer, M.D. as a Class II director effective September 15, 2026, with a term expiring at the 2028 annual meeting. The board determined he is independent under Nasdaq listing standards, and he brings prior FDA and drug-regulatory experience.
Robert Meyer, M.D. appointed Class II director effective September 15, 2026; term expires at the 2028 annual meeting
Annual director retainer of $40,000 under the Non-Employee Director Compensation Policy
Initial option grant for 31,182 shares of common stock, vesting in equal annual installments over three years
AECOM said Chief Legal Officer David Gan will retire, with his role passing to Manav Kumar, the company's General Counsel, Corporate and Global Head of Public Affairs, effective October 2, 2026. Gan will then serve as Senior Advisor until his retirement in the second half of 2027. The filing describes a planned leadership transition with no financial results or guidance included.
David Gan provided notice of retirement on September 14, 2026, and remains in his role through October 2, 2026.
Manav Kumar, age 42, becomes Chief Legal Officer effective October 2, 2026, and has been General Counsel, Corporate and Global Head of Public Affairs since December 2024.
Gan keeps his existing base salary as Senior Advisor until his retirement in the second half of 2027.
Gan remains eligible for a fiscal year 2026 annual incentive bonus but will not participate in annual or long-term incentive programs in fiscal year 2027.
Gossamer Bio appointed Gregory A. Ciongoli as a Class III director effective September 16, 2026, with a term expiring at the 2027 annual meeting, and also named him to the Audit Committee. The Board determined he is independent under Nasdaq listing rules, and he is a purchaser in the 2026 private placement, so his board seat ties him to securities he has agreed to buy in the company.
Appointed Class III director effective September 16, 2026; initial term expires at the 2027 annual meeting of stockholders
Receives a $40,000 annual cash retainer for Board service and a $7,500 annual cash retainer for Audit Committee service
Purchased initial closing pre-funded warrants in the 2026 PIPE (initial closing August 24, 2026) and agreed to buy second closing and FDA approval warrants
Board determined he is independent under Nasdaq Global Select Market listing requirements
Viper Energy's board increased its size by one seat and appointed geologist John Grotzinger as a director on September 15, 2026. The filing describes his scientific background and compensation terms, and states he has no committee assignment yet. For shareholders, this is a routine board addition that does not change financial results or guidance.
Appointed September 15, 2026; board expanded to nine directors
Grotzinger is Harold Brown Professor of Geology at Caltech and a former NASA Mars Science Laboratory Curiosity chief scientist
Receives non-employee director pay plus a pro-rated annual restricted stock unit award
Texas Capital Bancshares and Chief Risk Officer David Oman mutually agreed that he will leave the role effective September 16, 2026. The company said the departure is not tied to any disputes, financial condition, internal controls, or enterprise risk management matters.
David Oman departs as Chief Risk Officer effective September 16, 2026
David Youngberg, Chief Credit Officer, takes on Chief Risk Officer duties in addition to his current role
The company has started an internal and external search for a successor, and Youngberg is a candidate
Expeditors International said Blake Bell will change roles effective October 1, 2026, moving from President, Global Business Development to Senior Vice President, Professional Services. The company said dedicated leadership should strengthen its professional services offerings and support its growth objectives. The filing discloses no financial results, compensation changes or effects on the company's outlook.
Blake Bell's role change takes effect October 1, 2026.
He moves from President, Global Business Development to Senior Vice President, Professional Services.
The company says the change aims to strengthen professional services and accelerate growth objectives.
The filing was signed by CFO David A. Hackett on September 16, 2026.
First Interstate BancSystem and its bank subsidiary signed an employment agreement with Jeff Lee on September 14, 2026, formalizing his appointment as Executive Vice President and Chief Operations Officer. The filing sets out severance terms, including enhanced payments if he is terminated without cause or leaves for good reason within six months before or 18 months after a change in control.
Employment agreement with Jeff Lee executed and effective September 14, 2026; his COO appointment took effect with the signing.
Severance without cause or for good reason: one times base salary plus one times average annual cash incentive over the prior three years, paid over 12 months, with up to 12 months of insurance coverage.
Change-in-control severance: two times base salary plus two times target annual cash incentive, a pro-rata target bonus, and up to 24 months of insurance coverage.
Non-compete and non-solicitation restrictions run 12 months after termination, or 18 months if termination falls within the change-in-control window.
Alpha Pro Tech dismissed Tanner LLP as its independent registered public accounting firm on September 14, 2026, and engaged MNP LLP for the fiscal year ending December 31, 2026. The filing states Tanner's reports for 2024 and 2025 contained no adverse opinion, disclaimer, or qualification, and that there were no disagreements or reportable events with Tanner.
Tanner LLP dismissed effective immediately on September 14, 2026 by the Audit Committee
Tanner's reports for fiscal 2024 and 2025 had no adverse opinion, disclaimer, or qualification
MNP LLP engaged effective immediately for the fiscal year ending December 31, 2026
Tanner's letter dated September 16, 2026 (Exhibit 16.1) agrees with the company's statements
Alkermes plc expanded its Board from ten to eleven directors and appointed Anne C. Whitaker, effective immediately, with a term expiring at the 2027 annual general meeting. The filing says she has not yet been named to any board committee, and her initial director equity award has a target value of $600,000.
Board size increased from 10 to 11 directors; Whitaker appointed effective immediately, with term expiring at the 2027 annual general meeting
Initial new director equity award has an aggregate target value of $600,000, split 50% stock options and 50% restricted stock units
Award expected to be granted in October 2026 and to vest in three equal annual installments starting on the first anniversary of the grant date
Company entered into an indemnification deed and Alkermes, Inc. entered into an indemnification agreement with Whitaker
Littelfuse said Deepak Nayar, Senior Vice President and General Manager of the Electronics business, will become Special Advisor to the CEO effective January 1, 2027, and Dr. Karim Hamed will take an expanded role leading the combined Electronics and Semiconductor businesses. Under a special advisor agreement, Mr. Nayar will receive monthly payments totaling $1,004,220 for the advisory term, and the company said he will retire at the end of 2027.
Nayar's Electronics role ends December 31, 2026; he becomes Special Advisor to the CEO effective January 1, 2027.
Dr. Karim Hamed, who joined Littelfuse in 2025 as SVP and General Manager of the Semiconductor business, takes the expanded SVP and General Manager role for the CCDI Market & Electronics Segment effective January 1, 2027.
Nayar's advisory payments total $1,004,220, made up of a $557,900 base salary and $446,320 in target annual incentive award.
During the advisory term, Nayar will not receive new annual incentive or long-term incentive awards, but his remaining long-term awards may vest upon his retirement.
Autonomix Medical increased its Board from five to six members and appointed Sandra Kalter, a former Medtronic Vice-President and Chief Regulatory Counsel, as an independent director effective immediately. The filing says she has not been named to any Board committee yet, and the appointment is presented as adding medical device regulatory and industry experience.
Board size increased from five to six members; appointment made September 14, 2026, effective immediately
Kalter served at Medtronic plc in senior roles, most recently as Vice-President and Chief Regulatory Counsel from May 2011 to January 2025
No Board committee appointments at this time; she will join the standard non-employee director compensation program
Press release (Exhibit 99.1) dated September 16, 2026 announces the appointment
Jones Lang LaSalle appointed Paul Morgan as its new Chief Operating Officer, effective immediately, reporting to CEO and President Christian Ulbrich. The company is centralizing its enterprise-wide operational expertise into one global operations function under the new role, as part of its Accelerate 2030 long-term strategy. The filing contains no financial results or guidance, so the effect on shareholders is not quantified.
Paul Morgan, age 54, appointed Chief Operating Officer effective September 16, 2026, a newly created role
Morgan reports to CEO and President Christian Ulbrich and joins the Global Executive Board
Morgan previously was Global Chief Operating Officer of Real Estate Management Services and CEO of Workplace Management; he joined JLL in 2016 after 18 years at Johnson Controls
Mercury Systems said its independent directors approved Amendment No. 2 extending Chairman and CEO William L. Ballhaus's employment agreement to August 15, 2030, with the rest of the agreement unchanged. The company also reaffirmed the financial guidance it gave on its August 18, 2026 earnings call. The filing contains no new financial results or revised guidance, so the update mainly signals leadership continuity for shareholders.
Board approved Amendment No. 2 on September 15, 2026, extending the initial term to August 15, 2030
Ballhaus has served as Chairman and CEO for three years, according to the press release
Company reaffirmed financial guidance first provided on its August 18, 2026 earnings call
Press release issued September 16, 2026 and furnished, not filed, under Item 7.01
SunCoke Energy appointed Wendell L. Carter to its Board of Directors and its Compensation and Governance Committees, effective September 15, 2026. Carter previously served as Executive Vice President, Technology, at Cleveland-Cliffs Inc. from 2022 to 2025, and the company describes his steelmaking and engineering experience as relevant to the Board.
Board appointment made September 15, 2026; Carter joins the Compensation and Governance Committees.
Carter will receive the standard non-employee director compensation program, prorated for his start date.
Carter will stand for election at the Company's Annual Meeting of Stockholders in May 2027.
Carter served as Executive Vice President, Technology, at Cleveland-Cliffs Inc. from 2022 to 2025, overseeing 120 research engineers and a $1.0 billion engineering budget.
CLEAR Secure's President Michael Barkin, who is also a board member, will move to an advisory role on October 15, 2026, and resign from the board effective the same day, under a transition agreement dated September 15, 2026. Separately, EVP of Aviation Kyle McLaughlin will leave on October 2, 2026, and the company has started a search for his successor. Both departures are described as not involving any disagreement with the company, and the filing reports no financial results or guidance changes.
Michael Barkin moves to an advisory role on October 15, 2026, and resigns from the Board effective that date
Barkin's advisory service runs through December 31, 2026, at $300,000 per full month
Kyle McLaughlin, EVP Aviation, resigns to pursue a new opportunity; last day October 2, 2026
The company has initiated a search for McLaughlin's successor
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.