William Taulbee was named Chief Accounting Officer of Rambus Inc, effective September 8, 2026. As of November 6, 2026, Rambus Inc has reported 2 leadership change filings to the SEC under Item 5.02 of Form 8-K, from April 29, 2026 to September 4, 2026, naming 2 appointments and 1 departure (Form 8-K, September 4, 2026).
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Rambus Inc reported changes in 2 filings among its directors and officers to the SEC on Form 8-K, Item 5.02, from 2026-04-29 to 2026-09-04. They name 3 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 Rambus Inc files it.
Also on the record for Rambus Inc
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| November 5, 2026 | Stake report, Schedule 13G/A, by FMR LLC | 6.6% of the class | 5%+ stakes | Source |
| October 27, 2026 | Stake report, Schedule 13G/A, by BlackRock, Inc. | 10.4% of the class | 5%+ stakes | Source |
| July 29, 2026 | Stake report, Schedule 13G/A, by BlackRock, Inc. | 12.2% of the class | 5%+ stakes | Source |
| June 5, 2026 | Stake report, Schedule 13G, by FMR LLC | 10.4% of the class | 5%+ stakes | Source |
| May 15, 2026 | Stake report, Schedule 13G/A, by T. Rowe Price Associates, Inc. | 3.1% of the class | 5%+ stakes | Source |
| May 6, 2026 | Stake report, Schedule 13G, by Invesco Ltd. | 6% of the class | 5%+ stakes | Source |
| April 30, 2026 | Stake report, Schedule 13G, by Vanguard Capital Management | 5.22% of the class | 5%+ stakes | Source |
| April 29, 2026 | Stake report, Schedule 13G, by Vanguard Portfolio Management | 6.23% of the class | 5%+ stakes | Source |
| March 27, 2026 | Stake report, Schedule 13G/A, by The Vanguard Group | — | 5%+ stakes | Source |
| February 17, 2026 | Stake report, Schedule 13G, by T. Rowe Price Associates, Inc. | 5% of the class | 5%+ stakes | Source |
| January 21, 2026 | Stake report, Schedule 13G/A, by BlackRock, Inc. | 14% of the class | 5%+ stakes | Source |
| August 14, 2025 | Stake report, Schedule 13G/A, by T. Rowe Price Associates, Inc. | 4.4% of the class | 5%+ stakes | Source |
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Rambus Inc elsewhere on the record
Companies that share a holder
- Invesco Ltd. also filed stake reports on 83 other companies: Alignment Healthcare Inc (Aug 2026), ArcBest Corp (Aug 2026), ARKO Petroleum Corp (Aug 2026)
- T. Rowe Price Associates, Inc. also filed stake reports on 191 other companies: PACIFIC BIOSCIENCES OF CALIF (Nov 2026), APARTMENT INVT & MGMT CO -A (Oct 2026), BETA BIONICS INC (Oct 2026)
- FMR LLC also filed stake reports on 761 other companies: ASPEN NEUROSCIENCE INC (Nov 2026), AVALO THERAPEUTICS INC (Nov 2026), BRAZE INC (Nov 2026)
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Timeline
| Filed | In / out | Person | Role | Effective | Source |
|---|---|---|---|---|---|
| 2026-09-04 | Out | Principal Accounting Officer | 2026-09-08 | 8-K, 2026-09-04 | |
| 2026-09-04 | In | Chief Accounting Officer | 2026-09-08 | 8-K, 2026-09-04 | |
| 2026-04-29 | In | Chief Financial Officer | 2026-04-29 | 8-K, 2026-04-29 |
Who leads Rambus 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 Accounting Officer: William Taulbee, appointed, effective 2026-09-08 (filed 2026-09-04).
- Principal Accounting Officer: John Allen, departure reported, effective 2026-09-08 (filed 2026-09-04). No successor is named in these filings.
- Chief Financial Officer: Sumeet Gagneja, appointed, effective 2026-04-29 (filed 2026-04-29).
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Find candidates like Principal Accounting Officer at Rambus IncEvery change, in the filing's words
Departing: John Allen, Principal Accounting Officer, effective 2026-09-08
On August 31, 2026, John Allen, Vice President, Accounting and Chief Accounting Officer of Rambus Inc. (the " Company "), provided notice of his decision to retire, including from his role as Principal Accounting Officer of the Company, effective as of September 8, 2026.
Appointed: William Taulbee, Chief Accounting Officer, effective 2026-09-08
On August 31, 2026, the Company's board of directors appointed William Taulbee to succeed Mr. Allen as Vice President and Chief Accounting Officer serving as the Company's Principal Accounting Officer, effective as of September 8, 2026.
- Mr. Allen will remain employed by the Company through September 30, 2026 to provide support in the transition of his role.
- Mr. Allen's retirement does not involve any disagreement with the Company related to its operations, policies or practices.
- Mr. Taulbee, age 50, has served as the Company's Vice President, Accounting since August 2026.
- He previously served as an Executive Partner at Gartner, Inc., advising Chief Audit Executives.
- From December 2019 to August 2025, Mr. Taulbee served in several roles as Vice President, Strategy & Transformation, Vice President Finance Strategy and Chief Audit Executive at Western Digital, a data storage company.
- Mr. Taulbee earned a BA in Business Administration from Western Michigan University in 1998.
- In accordance with the Company's customary practice, the Company will enter into its standard form of indemnification agreement with Mr. Taulbee, which will require the Company to indemnify him against certain liabilities that may arise as a result of his status or service as an officer of the Company.
- Mr. Taulbee will also be eligible to participate in the Company's benefits plans, policies, and arrangements applicable to other executive officers of the Company.
Appointed: Sumeet Gagneja, Chief Financial Officer, effective 2026-04-29
The Board of Directors (the "Board") of Rambus Inc. ("Rambus" or the "Company") has appointed Sumeet Gagneja as the Senior Vice President and Chief Financial Officer of the Company, effective April 29, 2026, reporting to Luc Seraphin, Chief Executive Officer of the Company.
- In connection with the appointment, John Allen will cease serving as the Company's Interim Chief Financial officer, effective as of the same date, and will continue to serve as the Company's Vice President, Accounting and Chief Accounting Officer.
- Sumeet Gagneja, age 56, previously served as divisional Chief Financial Officer of the Data Center Segment at Advanced Micro Devices, Inc. from October 2024 to April 2026.
- Prior to that role, Mr. Gagneja was Senior Vice President, Chief Financial Officer of the Flash Business at Western Digital Corporation from September 2022 to October 2024.
- From November 2021 to September 2022, Mr. Gagneja served as Vice President, Corporate Controller at 10x Genomics, Inc. Mr. Gagneja was Chief Financial Officer at Innovium, Inc. from May 2021 to October 2021, before that company's acquisition by Marvell Technology, Inc. Before joining Innovium, Inc., Mr. Gagneja served as Corporate Vice President and Chief Accounting Officer at Xilinx, Inc. from March 2019 to May 2021.
- Mr. Gagneja served as Vice President and Chief Accounting Officer of Maxim Integrated Products, Inc. ("Maxim Integrated") from August 2017 to February 2019, and various finance roles at Maxim Integrated from 2013 to August 2017.
- Prior to joining Maxim Integrated, Mr. Gagneja held various finance positions at Broadcom Limited (previously Avago Technologies) and Intel Corporation.
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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.