619 material Form 8-K filings that 507 companies we cover made with the SEC in December 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).
Comcast entered into a new employment agreement with Michael J. Cavanagh ahead of his appointment as Co-Chief Executive Officer on January 2, 2026, securing his employment through January 1, 2029. The filing also discloses a performance-based restricted stock unit award valued at approximately $35 million, which ties the award's share count to the stock price around the planned Versant spin-off.
Cavanagh's annual base salary is $2,750,000, with a performance-based cash bonus target of 300% of base salary.
Performance-based RSU award valued at approximately $35 million cliff vests after three years.
Award vests for an additional 24 months if Cavanagh resigns for Good Reason or is terminated without Cause.
ServiceNow amended the employment agreement of CEO William R. McDermott and its Executive Severance Policy, both effective January 1, 2026. The amendment says he will remain with the company through at least December 31, 2030, in a CEO, co-CEO, or chairman role, and updates the severance terms he could receive on a qualifying termination. The filing describes these as contract changes and gives no financial results, so shareholders get clearer succession terms and severance terms but no new earnings or guidance.
Amendment dated December 23, 2025 keeps Mr. McDermott in service through at least December 31, 2030.
Upon a qualifying termination within three months before or 12 months after a change in control, the CEO may receive a lump sum of 2 times base salary plus target bonus, 24 months of COBRA benefits, and full vesting of unvested RSUs and PRS
Without a change in control, the CEO may receive one year of base salary in a lump sum, the actual bonus, and 12 months of COBRA benefits.
CooperCompanies appointed Walter M. Rosebrough, Jr. as a director effective January 3, 2026, and joined Browning West, an investment partnership, in a letter agreement with customary standstill and voting commitments. The agreement also commits the company to nominate Mr. Rosebrough at its 2026 annual meeting, to search for one more independent director, and to limit the board to ten directors during the cooperation period.
Mr. Rosebrough joins the board and its Corporate Governance and Nominating Committee effective January 3, 2026, and will receive the same compensation as other non-management directors.
The company agreed to search for one additional independent director, subject to Browning West's approval, and to appoint that person no later than June 30, 2026.
The board agreed to give due and serious consideration to appointing Mr. Rosebrough as Chairman by the end of 2026, according to the press release.
The cooperation period runs until 30 days before the 2027 annual meeting stockholder nomination deadline.
Krystal Biotech director Kirti Ganorkar gave notice on December 22, 2025 that he will resign from the Board. He will remain a director through December 31, 2025, and the company said the move was due to time constraints from his recent promotion at Sun Pharma, not a disagreement with the Board or management.
Kirti Ganorkar gave notice of resignation from the Board on December 22, 2025
He will continue as a director through December 31, 2025
Resignation attributed to time constraints from a recent promotion to Managing Director at Sun Pharma, not a disagreement with the company
He had served on the Board since the company's September 2017 initial public offering
On December 23, 2025, Simmons First and chairman and CEO George Makris, Jr. signed an aircraft time sharing agreement allowing him to lease company aircraft with flight crew for personal travel, subject to reimbursing actual flight expenses. The filing says the company will not provide tax reimbursements for imputed income or federal air transportation excise tax, which limits the company's cost exposure from this arrangement.
Agreement signed December 23, 2025 between Simmons First and chairman and CEO George Makris, Jr.
Makris must reimburse the company for actual expenses of personal flights, including deadhead flights.
Either party may terminate the agreement with 10 business days' prior written notice.
The company will not cover taxes on imputed income or federal air transportation excise tax under the agreement.
Six Flags director Louis Carr notified the board on December 17, 2025 that he will resign effective December 24, 2025. The company said the resignation was not due to any disagreement with the board, the company or management. The filing also says the board will have 10 directors as of January 1, 2026, after previously announced departures of Selim Bassoul and Daniel Hanrahan.
Louis Carr resignation as director effective December 24, 2025; notified board December 17, 2025
No disagreement with the board, company or management cited as a reason
Board to comprise 12 directors after Carr's departure, and 10 directors as of January 1, 2026 after Selim Bassoul and Daniel Hanrahan leave
HCI Group's majority-owned subsidiary Exzeo Group signed an employment agreement with Paresh Patel, who is also HCI's chief executive, effective January 1, 2026, with a base salary of $950,000 a year and 12 months of base salary as severance in certain termination cases. Exzeo also awarded Patel a $3,750,000 cash bonus on December 19, 2025, and Patel adopted a trading plan to buy up to 100,000 shares or $2 million of Exzeo common stock.
Employment agreement dated December 9, 2025, effective January 1, 2026, sets a base salary of $950,000 per year
Severance equal to 12 months of base salary, paid over 12 months, applies on termination without cause, for Good Reason, or within 180 days after a Change of Control, in exchange for a release of claims
Exzeo awarded a $3,750,000 cash bonus on December 19, 2025, payable before December 31, 2025
Patel's Rule 10b5-1 plan, entered December 18, 2025, covers purchases of up to 100,000 shares or $2 million of Exzeo common stock and runs to December 18, 2026 at most
Henry Schein said its Board expects to name a successor CEO by mid-January 2026, and Stanley M. Bergman will remain CEO and Chairman until then. The company and Mr. Bergman also signed a letter agreement extending his employment agreement until a new CEO starts or 30 days after he gives written notice that he is ending his employment. For shareholders, the filing signals a leadership transition is near but not yet complete, with no financial results reported.
Board expects to name next CEO by mid-January 2026; search will not be finalized before year-end 2025
Stanley M. Bergman continues as CEO and Chairman until a successor assumes the role
Letter agreement extends Bergman's employment agreement dated November 28, 2022, through the earlier of a new CEO's start date or 30 days after his written notice of departure
MSA Safety said Senior Vice President and MSA International President David J. Howells intends to retire on June 30, 2026. The company does not plan to replace him; senior personnel in the segment will take over his duties and report directly to the CEO.
David J. Howells, SVP and President of MSA International, intends to retire June 30, 2026
No replacement planned; duties move to senior personnel in the MSA International segment
Segment personnel will report directly to the Chief Executive Officer
Graphic Packaging's compensation committee approved a retention package for Joseph P. Yost, Executive Vice President and President, Americas. The package includes a $2,000,000 cash retention bonus and $2,000,000 in Service Restricted Stock Units, both payable or vesting on January 2, 2027, if he remains employed. The filing is a compensation arrangement and does not report financial results.
Cash retention bonus of $2,000,000 paid as a lump sum after January 2, 2027, if Yost remains employed
Service RSUs granted with a value of $2,000,000 on the grant date, effective January 2, 2026, vesting January 2, 2027
Payment or vesting accelerates on death, Disability, or termination without Cause or for Good Reason
TransUnion's Board voted to increase its size from 10 to 12 members and appointed Sayan Chakraborty and Charlotte B. Yarkoni as directors, effective January 5, 2026. The appointments add technology and cloud/AI product experience to the Board, but the filing reports no financial results or changes to company operations.
Board expanded from 10 to 12 members, effective January 5, 2026
Sayan Chakraborty, 58, former President of Workday, joins the Technology Committee
Charlotte B. Yarkoni, 56, former Microsoft President of Commerce, Ecosystems, Cloud and AI, joins the Compensation Committee
Both directors will serve until the 2026 annual meeting of stockholders and receive standard non-employee director compensation
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.