815 material Form 8-K filings that 659 companies we cover made with the SEC in March 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).
Centene's board effective March 18, 2026 appointed Theodore Pienkos, a registered CPA who has been at the company since 2011, as Corporate Controller and Chief Accounting Officer. Kate Casso, who held that role since April 2021, moved to Senior Vice President, Finance Operations and Innovation, with part of her time devoted to innovation. This is a routine finance leadership change that does not alter reported results or guidance.
Theodore Pienkos, 44, named Corporate Controller and Chief Accounting Officer effective March 18, 2026
Pienkos base salary of $440,000 with target bonus of 60% of base salary
Kate Casso, prior Controller and CAO since April 2021, appointed Senior Vice President, Finance Operations and Innovation
Pienkos previously served as Deputy Corporate Controller since August 2024
Simon Property Group announced the death of David Simon, its Chairman, CEO and President, who died March 22, 2026 at age 64. The board appointed his son Eli Simon, age 38, as CEO and President effective March 23, 2026, while he continues as Chief Operating Officer and director, and named Larry Glasscock Non-Executive Chairman.
David Simon died March 22, 2026, at age 64, per the press release.
Eli Simon, age 38, appointed CEO and President effective March 23, 2026; no compensation changes approved yet.
Larry Glasscock appointed Non-Executive Chairman; he continues as a director and on the Audit and Governance and Nominating Committees.
The Class B director seat vacated by David Simon has not yet been filled by the Voting Trust trustee.
Trimble said senior vice president Peter Large, who oversees strategy, corporate development, partnerships and alliances, and the Office of Technology Innovation, will retire effective late May 2026. The company said the decision is not related to any disagreement over operations, policies, or practices, and Large will receive no severance.
Peter Large announced his retirement on March 24, 2026, effective late May 2026.
Large's retirement is not the result of any disagreement with the company.
No severance will be paid; the departure qualifies as retirement under the Age & Service Equity Vesting Program.
Versigent's board appointed Paul Meister as a director, effective March 27, 2026, expanding the board from two to three members. The filing says he is expected to become board chair when the Aptiv spin-off takes effect on April 1, 2026, and the company will be renamed Versigent PLC at that point.
Board appointed Paul Meister on March 23, 2026; effective 9:00 a.m. Eastern Time on March 27, 2026
Board size increases from two to three directors; Meister joins the Audit, Compensation and Human Resources, and Nominating and Governance committees
Meister is expected to be appointed non-executive Chair; he is set to receive $300,000 in annual director pay plus a $185,000 annual Chair retainer
Meister must hold $600,000 in company ordinary shares within five years of appointment
Chesapeake Utilities said Chief Financial Officer Beth Cooper will retire effective June 30, 2026, after more than 36 years with the company. Jeffrey Sylvester, currently chief operating officer, will become CFO effective July 1, 2026 and will give up the COO role while remaining a senior vice president.
Beth Cooper, CFO, EVP, Treasurer and Assistant Secretary, retires effective June 30, 2026
Jeffrey S. Sylvester succeeds Cooper as CFO effective July 1, 2026 and ceases to serve as COO
Sylvester has served as senior vice president since 2019 and COO since January 2022
The filing states Sylvester's compensatory and other material employment terms will remain unchanged
Two Minerals Technologies board members, Alison A. Deans and Franklin L. Feder, notified the company on March 18, 2026 that they will retire from the board when their current terms end at the May 20, 2026 annual meeting of shareholders. The filing does not name replacements or explain the reasons for the retirements.
Directors Alison A. Deans and Franklin L. Feder notified the company on March 18, 2026 of their retirements.
Retirements take effect at the end of their terms, at the May 20, 2026 annual meeting of shareholders.
The filing does not name successor directors or give reasons for the departures.
Dycom Industries added Raejeanne Skillern, a former Amazon Web Services and Intel executive, to its board of directors effective March 24, 2026, expanding the board from ten to eleven members. The Board determined she is independent and has not yet assigned her to any committee.
Appointed to the Board effective March 24, 2026, with her term expiring at the 2026 Annual Meeting of Shareholders
Previously served as Vice President and Chief Marketing Officer at AWS from 2023 to 2025 and President of Flex's Communications, Enterprise & Cloud Division from 2019 to 2023
Board increased from ten to eleven members; she was determined independent under NYSE rules
Compensation will be prorated and follows the director pay described in the 2025 proxy statement
Customers Bancorp entered into a Supplemental Executive Retirement Plan for Samvir Sidhu on March 19, 2026, replacing a plan adopted for him on May 3, 2021. The plan provides lifetime monthly benefits, including a $50,000 monthly benefit after normal retirement age, and is designed to encourage his continued contributions to the company.
Plan dated March 19, 2026, for executive Samvir Sidhu, superseding his plan adopted May 3, 2021
Monthly lifetime benefit of $50,000 payable after separation from service at normal retirement age
Additional benefits include an early termination benefit, a change-in-control benefit, and disability and death benefits; benefits can be forfeited if terminated for cause
Solventum Corporation disclosed that Mary Wilcox informed the company on March 20, 2026 of her intent to retire and resign as Chief Accounting Officer, pending the search for and appointment of a successor. The filing is a routine leadership transition for a senior finance role and does not report any financial results or guidance changes.
Mary Wilcox notified Solventum of her intent to retire and resign as Chief Accounting Officer on March 20, 2026.
Her departure is contingent on the company appointing a successor following a search.
The filing does not name a successor or state an effective departure date.
The 8-K was signed by CFO Wayde McMillan on March 24, 2026.
American Airlines Group elected Mary N. Dillon to its Board of Directors on March 24, 2026, and named her to the Compensation Committee and the Corporate Governance and Public Responsibility Committee. The filing describes her as a former president and CEO of Foot Locker and CEO of Ulta Beauty, which may matter to shareholders as a board addition with consumer-brand leadership experience, though the filing contains no financial results or operating changes.
Mary N. Dillon, age 64, elected to the board on March 24, 2026
Serves on the Compensation Committee and the Corporate Governance and Public Responsibility Committee
Served as President and CEO of Foot Locker from 2022 to 2025 and CEO of Ulta Beauty from 2013 to 2021
Director compensation follows the same basis as other non-employee directors
Twilio's board appointed Doug Robinson as a director effective March 24, 2026, and added him to the Compensation and Talent Management Committee. The board also expanded from nine to ten directors, a change that adds a seat but involves no financial results or guidance.
Doug Robinson joins the board effective immediately, serving as a Class I director until the 2026 Annual Meeting.
Robinson previously spent 15 years at Workday, most recently as Co-President, and held positions at PeopleSoft and Oracle earlier.
The board size increased from nine to ten directors, and Class I expanded from three to four directors.
Robinson will receive the standard non-employee director compensation and enter Twilio's standard indemnification agreement.
eBay appointed Brian Sharples as an independent director, effective March 20, 2026, increasing the board to 12 members. The filing covers a board appointment, not financial results or guidance, so it has no direct effect on reported performance.
Board appointed Brian H. Sharples on March 19, 2026; effective March 20, 2026, with a term ending at the 2026 annual meeting.
Board size increased to 12 members; 11 of 12 directors are independent, according to the press release.
Sharples will receive standard non-employee director compensation and enter into the company's standard Indemnity Agreement.
Dollar General's Board approved Jerry W. "JJ" Fleeman Jr., currently CEO of Ahold Delhaize USA, to succeed Todd Vasos as CEO effective January 1, 2027. Vasos remains CEO until then, serves as Senior Advisor through April 2, 2027, and is expected to stay on the Board, and the filing details the compensation terms for both executives.
Fleeman, age 52, has more than 35 years of grocery retail experience and has been CEO of Ahold Delhaize USA since April 2023.
Fleeman's initial terms include a $1.25 million base salary, a 150% target fiscal 2026 bonus opportunity (prorated), and a $500,000 cash signing bonus.
Fleeman will receive an inducement equity award with a nominal value of about $4 million and a new hire equity award with a nominal annual value of $7.5 million.
Vasos's employment ends April 2, 2027, and his transition agreement becomes void if a new CEO does not start by January 2, 2027.
TDS approved a 2026 Executive Officer Bonus Program on March 18, 2026, covering its Vice Chair, executive and senior vice presidents, and the TDS Telecom President and CEO. Bonuses are weighted 80% on company performance and 20% on individual performance, with the company measure split 65% TDS Telecom and 35% Array Digital Infrastructure. The filing does not state any dollar amounts or financial results.
Plan approved by the TDS Compensation and Human Resources Committee on March 18, 2026
Performance weighting: 80% company measures, 20% individual measures
Company measure for most participants: TDS Telecom 65%, Array 35%
Array's separate 2026 Annual Incentive Plan, filed by Array on March 22, 2026, sets the annual bonus for the Array President and CEO
Corebridge Financial directors Rose Marie Glazer and Adam Burk resigned from the board effective March 23, 2026, and AIG waived its right to designate any board members. The changes follow Corebridge's February 17, 2026 repurchase of common stock from AIG, which reduced AIG's ownership to about 5%. The filing says the resignations were not related to any disagreement with the company, and the board plans to cut its authorized size to 11 from 13.
Rose Marie Glazer and Adam Burk resigned from the board effective close of business March 23, 2026, with no disagreement cited
AIG waived its right to designate board members on March 23, 2026, reducing its designees to zero from one
The February 17, 2026 share repurchase from AIG was about $750 million at $30.42 per share and cut AIG's stake to about 5%
The board intends to reduce its authorized seats to 11 from 13
QuidelOrtho appointed Nathaniel Sisitsky as Chief Legal Officer and Corporate Secretary, effective March 23, 2026, succeeding Michelle Hodges, who is retiring from both roles. Hodges will remain as a special advisor to the CEO for up to 24 months under a transition agreement, with her equity awards continuing to vest. The change is a senior legal leadership transition with no financial results or guidance included.
Nathaniel "Nate" Sisitsky named Chief Legal Officer and Corporate Secretary, effective March 23, 2026
Sisitsky previously served as Chief Legal Officer and Corporate Secretary at STAAR Surgical Company and reports to CEO Brian Blaser
Hodges notified the company of her retirement on March 18, 2026; she will receive base salary for up to six months, then serve as special advisor for up to 24 months at a 50% salary reduction after the first 12 months
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.