Martin Costas was named Chief Operations Officer and Chief Financial Officer of Blaize Holdings, Inc., succeeding Harminder Sehmi, effective November 2, 2026. As of November 6, 2026, Blaize Holdings, Inc. has reported one leadership change filing to the SEC under Item 5.02 of Form 8-K, on November 5, 2026, naming 2 appointments and 1 departure (Form 8-K, November 5, 2026).
Blaize Holdings, Inc. named a new Chief Operations Officer and Chief Financial Officer on Nov 5. 30 companies changed executives this week.
Companies that just changed executives, and the new executive. Before you unlock: the company, the change and what is inside. After: the executive named with their role, how to reach the company, and a person's email only when we found one.
| John Hancock Comvest Private Income Fund | named a new Chief Financial Officer | |
| Bain Capital Specialty Finance, Inc. | named a new Director | |
| Azora Therapeutics, Inc. (DE) | named a new Director | |
| LASE Corp. | named a new Director | |
| Century Communities, Inc. | named a new Executive Chairman |
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Key facts
- · In / out: In · Person: Martin Costas · Role: Chief Operations Officer and Chief Financial Officer · Effective: 2026-11-02 · 8-K, 2026-11-05
- · In / out: In · Person: Martin Costas · 8-K, 2026-11-05
- · In / out: Out · Person: Harminder Sehmi · Role: Chief Financial Officer · 8-K, 2026-11-05
Blaize Holdings, Inc. reported a change among its directors and officers to the SEC on Form 8-K, Item 5.02, on 2026-11-05. It names 2 people, with 2 appointments and 1 departure. Every row below is cited to the filing it comes from, and this page adds each new change as Blaize Holdings, Inc. files it.
Layoffs on record: 1 filing or notice, latest 2026-09-30 (layoff filings and notices).
Also on the record for Blaize Holdings, Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 27, 2026 | Stake report, Schedule 13G/A, by BlackRock, Inc. | 6.3% of the class | 5%+ stakes | Source |
| September 18, 2026 | Stake report, Schedule 13D/A, by Bess Ventures & Advisory, LLC | 9% of the class | 5%+ stakes | Source |
| August 14, 2026 | Stake report, Schedule 13G, by Polar Asset Management Partners Inc. | 5.6% of the class | 5%+ stakes | Source |
| August 4, 2026 | Stake report, Schedule 13D/A, by Munagala Dinakar | 6% of the class | 5%+ stakes | Source |
| July 27, 2026 | Stake report, Schedule 13G, by BlackRock, Inc. | 5.1% of the class | 5%+ stakes | Source |
| July 10, 2026 | Stake report, Schedule 13G/A, by Ava Investors S.A. | 4.9% of the class | 5%+ stakes | Source |
| July 9, 2026 | Stake report, Schedule 13D/A, by Bess Ventures & Advisory, LLC | 10.4% of the class | 5%+ stakes | Source |
| May 15, 2026 | Stake report, Schedule 13G/A, by DENSO International America, Inc | — | 5%+ stakes | Source |
| May 12, 2026 | Stake report, Schedule 13D/A, by Bess Ventures & Advisory, LLC | 9.2% of the class | 5%+ stakes | Source |
| April 2, 2026 | Stake report, Schedule 13G/A, by Ava Investors S.A. | 9.56% of the class | 5%+ stakes | Source |
| March 24, 2026 | Stake report, Schedule 13D/A, by Munagala Dinakar | 6.2% of the class | 5%+ stakes | Source |
| February 6, 2026 | Stake report, Schedule 13G/A, by Temasek Holdings (Private) Limited | 4.97% of the class | 5%+ stakes | Source |
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More on Blaize Holdings, Inc. and the records around it.
Blaize Holdings, Inc. elsewhere on the record
- 5%+ stake filings Oct 2026
- Form D filing Nov 2025
- Who owns it
Companies that share a holder
- Boothbay Fund Management LLC also filed stake reports on 5 other companies: Sequans Communications S.A. (Nov 2025), Forte Biosciences, Inc. (Aug 2025), Renatus Tactical Acquisition Corp I (Aug 2025)
- Temasek Holdings (Private) Limited also filed stake reports on 8 other companies: Pasqal Holding SA (Oct 2026), Flywire Corporation (Jul 2026), Amber International Holding Limited (Jun 2026)
- Polar Asset Management Partners Inc. also filed stake reports on 69 other companies: Aeon Acquisition I Corp. (Aug 2026), Bitcoin Depot Inc. (Aug 2026), ACP Holdings Acquisition Corp. (Aug 2026)
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Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-11-05 | In | Chief Operations Officer and Chief Financial Officer | 2026-11-02 | 8-K, 2026-11-05 | |
| 2026-11-05 | In | 8-K, 2026-11-05 | |||
| 2026-11-05 | Out | Chief Financial Officer | 8-K, 2026-11-05 |
Who leads Blaize Holdings, Inc., as last reported?
For each role that changed in the filings below, the most recent change reported. A role that did not change in these filings is not listed.
- Chief Financial Officer: Harminder Sehmi, departure reported (filed 2026-11-05). No successor is named in these filings.
- Chief Operations Officer and Chief Financial Officer: Martin Costas, appointed, effective 2026-11-02 (filed 2026-11-05).
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Find candidates like Chief Operations Officer and Chief Financial Officer at Blaize Holdings, Inc.Every change, in the filing's words
Appointed: Martin Costas, Chief Operations Officer and Chief Financial Officer, effective 2026-11-02
On October 30, 2026, Blaize Holdings, Inc. (the "Company") appointed Martin Costas as Chief Operations Officer and Chief Financial Officer, effective as of November 2, 2026 (the "CFO Transition Date").
Appointed: Martin Costas
In these roles, Mr. Costas will serve as the Company's "principal operating officer," "principal accounting officer," and "principal financial officer".
Departing: Harminder Sehmi, Chief Financial Officer
On October 30, 2026, Harminder Sehmi notified the Company of his decision to retire as Chief Financial Officer of the Company, effective as of the CFO Transition Date.
- Departure of Certain Officers; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
- Mr. Costas will report to Dinakar Munagala, the Company's Chief Executive Officer.
- In connection with his appointment as Chief Operations Officer and Chief Financial Officer, on October 30, 2026, Mr. Costas entered into an offer letter (the "Offer Letter") with Blaize, Inc., a subsidiary of the Company, and a Change in Control and Severance Agreement (the "Severance Agreement") with the Company.
- Mr. Costas, age 49, served as Chief Financial Officer of BOXABL Inc., a manufacturer of factory-built housing, from October 2023 to September 2026.
- From 2022 to October 2023, he served as Chief Financial Officer of Honeywell Process Solutions, a business unit of Honeywell International Inc., and from 2019 to 2022, as Chief Financial Officer of Nexans AmerCable, a manufacturer of specialty cable.
- Previously, he held finance leadership roles at Sysco Corporation and SLB (formerly Schlumberger), including as Global Controller of SLB's Drilling Solutions business, and began his career at PricewaterhouseCoopers.
- Mr. Costas holds an MBA from the Universitat de Barcelona and a bachelor's degree in Accounting from Universidad Argentina de la Empresa.
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Where this comes from
A public company must file a current report on Form 8-K with the SEC within four business days when a director leaves or is elected, or when its chief executive, chief financial, chief accounting or chief operating officer, or another named executive, departs or is appointed. That disclosure goes under Item 5.02 of the report.
Every change on this page is taken from one of those filings and quoted in the company's own words, with a link to the filing, so it can be checked at the source. Where a filing names the person, the role and the date a change takes effect, they are shown beside the quote. Where it does not, the quote stands on its own. A filing states what changed; it rarely states why, and neither does this page.