Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| GLOBALFOUNDRIES Inc.GFS · Entity 3198 | Director | May 01, 2026 | May 05, 2026 |
| Sandisk CorpSNDK · Entity 1106 | Director | May 12, 2026 | May 14, 2026 |
| USA Rare Earth, Inc.USAR · Entity 4023 | Director | October 01, 2026 | October 06, 2026 |
| WESTERN DIGITAL CORPWDC · Entity 1010 | Director | November 20, 2024 | November 22, 2024 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
GLOBALFOUNDRIES Inc.
Report date May 01, 2026 · Filed May 05, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Restricted Share UnitsSEC Table I · non-derivative | Direct | 188,256 |
Reported balance
After 2026-05-01 transaction · row 1
Account or security details depend on footnotes; rows are not merged.
1 source rowRow 1 · 2026-05-01 · Grant · Acquired 146,199 · Balance 188,256 F1: Reflects restricted share units (RSUs) awarded May 1, 2026 to the Reporting Person. Such RSUs vest on December 31, 2027, subject to the Reporting Person's continued service with the Issuer through the vesting date. Each RSU represents a contingent right to receive one share of the Issuer's ordinary shares upon settlement. F2: Represents RSUs, 42,057 of which vest on February 27, 2027, and 146,199 of which vest on December 31, 2027, subject to the Reporting Person's continuous service through each such vesting date. Each RSU represents a contingent right to receive one share of the Issuer's ordinary shares upon settlement. |
Filing footnotes · ownership attribution and instrument terms
F1: Reflects restricted share units (RSUs) awarded May 1, 2026 to the Reporting Person. Such RSUs vest on December 31, 2027, subject to the Reporting Person's continued service with the Issuer through the vesting date. Each RSU represents a contingent right to receive one share of the Issuer's ordinary shares upon settlement.
F2: Represents RSUs, 42,057 of which vest on February 27, 2027, and 146,199 of which vest on December 31, 2027, subject to the Reporting Person's continuous service through each such vesting date. Each RSU represents a contingent right to receive one share of the Issuer's ordinary shares upon settlement.
Sandisk Corp
Report date May 12, 2026 · Filed May 14, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | IndirectSpouse's Trust | 4,834 |
Reported balance
After 2026-05-12 transaction · row 1
Account identity is unresolved; indirect or unspecified ownership is not merged.
1 source rowRow 1 · 2026-05-12 · Gift · Disposed 9,666 · Balance 4,834 F1: On May 12, 2026, the Reporting Person's Spouse's Trust gifted 9,666 shares to irrevocable trusts for the benefit of the Reporting Person's children for estate planning purposes. The Reporting Person disclaims beneficial ownership of these shares, which are now held by a third-party trustee, and they are no longer indirectly owned by the Reporting Person. |
| Common StockSEC Table I · non-derivative | Direct | 2,312 |
Reported balance
Holding disclosure · report date 2026-05-12 · row 2
Holding and transaction disclosures are not merged.
1 source rowRow 2 · Balance 2,312 |
Filing footnotes · ownership attribution and instrument terms
F1: On May 12, 2026, the Reporting Person's Spouse's Trust gifted 9,666 shares to irrevocable trusts for the benefit of the Reporting Person's children for estate planning purposes. The Reporting Person disclaims beneficial ownership of these shares, which are now held by a third-party trustee, and they are no longer indirectly owned by the Reporting Person.
USA Rare Earth, Inc.
Report date October 01, 2026 · Filed October 06, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common Stock, par value $0.0001 per shareSEC Table I · non-derivative | Direct | 4,708 |
Reported balance
After 2026-10-01 transaction · row 1
1 source rowRow 1 · 2026-10-01 · Grant · Acquired 1,482 · Balance 4,708 F1: Common stock provided to the reporting person in lieu of board service compensation for the period July 1, 2026 through September 30, 2026. |
| Common Stock, par value $0.0001 per shareSEC Table I · non-derivative | IndirectThe Thomas Caulfield Revocable Trust | 52,500 |
Reported balance
Holding disclosure · report date 2026-10-01 · row 2
Holding and transaction disclosures are not merged.
1 source rowRow 2 · Balance 52,500 |
Filing footnotes · ownership attribution and instrument terms
F1: Common stock provided to the reporting person in lieu of board service compensation for the period July 1, 2026 through September 30, 2026.
WESTERN DIGITAL CORP
Report date November 20, 2024 · Filed November 22, 2024
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 21,737 |
Reported balance
After 2024-11-20 transaction · row 1
Account or security details depend on footnotes; rows are not merged.
1 source rowRow 1 · 2024-11-20 · Grant · Acquired 3,759 · Balance 21,737 F1: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. |
Filing footnotes · ownership attribution and instrument terms
F1: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| October 01, 2026 Filed Oct 6, 2026 00:48 UTC | USA Rare Earth, Inc. USAR · Entity 4023 | GrantCommon Stock, par value $0.0001 per share | 1,482 | $0.00 | $0.00 |
DisclosureSEC source: 0001342570-26-000012 · wk-form4_1791247695.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 4,708 F1 · shares: Common stock provided to the reporting person in lieu of board service compensation for the period July 1, 2026 through September 30, 2026. Read SEC document |
| July 07, 2026 Filed Jul 7, 2026 23:15 UTC | USA Rare Earth, Inc. USAR · Entity 4023 | GrantCommon Stock, par value $0.0001 per share | 271 | $0.00 | $0.00 |
DisclosureSEC source: 0001342570-26-000009 · wk-form4_1783466149.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 3,226 F1 · shares: Common stock provided to the reporting person in lieu of board service compensation for the period June 3, 2026 through June 30, 2026. Read SEC document |
| June 03, 2026 Filed Jun 4, 2026 23:21 UTC | USA Rare Earth, Inc. USAR · Entity 4023 | GrantRestricted Stock Units · Derivative | 6,438 | $0.00 | $0.00 |
DisclosureSEC source: 0001342570-26-000007 · wk-form4_1780615306.xml · derivative · entry 5 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 6,438 Underlying: Common Stock, par value $0.0001 per share · 6,438 shares Expires not disclosed F4 · derivative.exercise_price: The restricted stock unit will fully vest on the earlier of 1 year from grant date or 2027 Annual Meeting date, anticipated to be on or about June 2, 2027. F2 · shares: Each restricted stock unit represents the right to receive, at settlement, one (1) share of the Issuer's common stock. F4 · derivative.exercise_date: The restricted stock unit will fully vest on the earlier of 1 year from grant date or 2027 Annual Meeting date, anticipated to be on or about June 2, 2027. F4 · derivative.expiration_date: The restricted stock unit will fully vest on the earlier of 1 year from grant date or 2027 Annual Meeting date, anticipated to be on or about June 2, 2027. Read SEC document |
| June 03, 2026 Filed Jun 4, 2026 23:21 UTC | USA Rare Earth, Inc. USAR · Entity 4023 | Exercise / conversionRestricted Stock Units · Derivative | 2,548 | $0.00 | $0.00 |
DisclosureSEC source: 0001342570-26-000007 · wk-form4_1780615306.xml · derivative · entry 4 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock, par value $0.0001 per share · 2,548 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_price: Each restricted stock unit represents the right to receive, at settlement, one (1) share of the Issuer's common stock. F3 · derivative.exercise_date: On March 19, 2026, the reporting person was granted the reported restricted stock units which vested in full on June 3, 2026. F3 · derivative.expiration_date: On March 19, 2026, the reporting person was granted the reported restricted stock units which vested in full on June 3, 2026. Read SEC document |
| June 03, 2026 Filed Jun 4, 2026 23:21 UTC | USA Rare Earth, Inc. USAR · Entity 4023 | Exercise / conversionCommon Stock, par value $0.0001 per share | 2,548 | $0.00 | $0.00 |
DisclosureSEC source: 0001342570-26-000007 · wk-form4_1780615306.xml · nonDerivative · entry 2 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 2,955 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| June 03, 2026 Filed Jun 4, 2026 23:21 UTC | USA Rare Earth, Inc. USAR · Entity 4023 | GrantCommon Stock, par value $0.0001 per share | 407 | $0.00 | $0.00 |
DisclosureSEC source: 0001342570-26-000007 · wk-form4_1780615306.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 407 F1 · shares: Restricted stock units granted to the reporting person in lieu of board service compensation for the period March 19, 2026 through June 2, 2026. Read SEC document |
| May 12, 2026 Filed May 14, 2026 21:36 UTC | Sandisk Corp SNDK · Entity 1106 | GiftCommon Stock | 9,666 | $0.00 | $0.00 |
DisclosureSEC source: 0001363249-26-000031 · edgardoc.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Indirect · Spouse's Trust Disclosed balance after: 4,834 F1 · kind: On May 12, 2026, the Reporting Person's Spouse's Trust gifted 9,666 shares to irrevocable trusts for the benefit of the Reporting Person's children for estate planning purposes. The Reporting Person disclaims beneficial ownership of these shares, which are now held by a third-party trustee, and they are no longer indirectly owned by the Reporting Person. Read SEC document |
| May 01, 2026 Filed May 5, 2026 15:45 UTC | GLOBALFOUNDRIES Inc. GFS · Entity 3198 | GrantRestricted Share Units | 146,199 | $0.00 | $0.00 |
DisclosureSEC source: 0001709048-26-000114 · wk-form4_1777995925.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 188,256 F1 · shares: Reflects restricted share units (RSUs) awarded May 1, 2026 to the Reporting Person. Such RSUs vest on December 31, 2027, subject to the Reporting Person's continued service with the Issuer through the vesting date. Each RSU represents a contingent right to receive one share of the Issuer's ordinary shares upon settlement. F2 · balance_after: Represents RSUs, 42,057 of which vest on February 27, 2027, and 146,199 of which vest on December 31, 2027, subject to the Reporting Person's continuous service through each such vesting date. Each RSU represents a contingent right to receive one share of the Issuer's ordinary shares upon settlement. Read SEC document |
| March 19, 2026 Filed Mar 24, 2026 00:57 UTC | USA Rare Earth, Inc. USAR · Entity 4023 | GrantRestricted Stock Units · Derivative | 2,548 | $0.00 | $0.00 |
DisclosureSEC source: 0001342570-26-000005 · wk-form4_1774313826.xml · derivative · entry 2 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 2,548 Underlying: Common Stock, par value $0.0001 per share · 2,548 shares Expires not disclosed F1 · derivative.exercise_price: The restricted stock unit ("RSU") will fully vest on June 3, 2026. F2 · shares: Each restricted stock unit represents the right to receive, at settlement, one (1) share of the Issuer's common stock. F1 · derivative.exercise_date: The restricted stock unit ("RSU") will fully vest on June 3, 2026. F1 · derivative.expiration_date: The restricted stock unit ("RSU") will fully vest on June 3, 2026. Read SEC document |
| March 03, 2026 Filed Mar 6, 2026 00:12 UTC | Sandisk Corp SNDK · Entity 1106 | GiftCommon Stock | 14,500 | $0.00 | $0.00 |
DisclosureSEC source: 0001363249-26-000008 · edgardoc.xml · nonDerivative · entry 2 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Indirect · Spouse's Trust Disclosed balance after: 14,500 Read SEC document |
| March 03, 2026 Filed Mar 6, 2026 00:12 UTC | Sandisk Corp SNDK · Entity 1106 | GiftCommon Stock | 14,500 | $0.00 | $0.00 |
DisclosureSEC source: 0001363249-26-000008 · edgardoc.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 2,312 F1 · kind: This transfer was for bona fide estate planning purposes. The transferred shares remain subject to certain restrictions on transfer pursuant to a lock-up agreement, expiring March 19, 2026. Read SEC document |
| November 18, 2025 Filed Nov 20, 2025 00:39 UTC | Sandisk Corp SNDK · Entity 1106 | GrantCommon Stock | 979 | $0.00 | $0.00 |
DisclosureSEC source: 0001363249-25-000114 · edgardoc.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 16,812 F1 · shares: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. Read SEC document |
| March 03, 2025 Filed Mar 4, 2025 23:14 UTC | Sandisk Corp SNDK · Entity 1106 | GrantCommon Stock | 4,148 | $0.00 | $0.00 |
DisclosureSEC source: 0001363249-25-000015 · primary_doc.xml · nonDerivative · entry 2 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 15,833 F3 · shares: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. Read SEC document |
| February 28, 2025 Filed Mar 4, 2025 23:14 UTC | Sandisk Corp SNDK · Entity 1106 | GrantCommon Stock | 5,693 | $0.00 | $0.00 |
DisclosureSEC source: 0001363249-25-000015 · primary_doc.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 11,685 F1 · shares: In connection with the Spin-Off, each WDC Restricted Stock Unit ("WDC RSU") held by the reporting person immediately prior to the Spin-Off was converted into Sandisk Restricted Stock Unit ("Sandisk RSU") using the Spinco ratio as per the agreement, and shall have substantially the same vesting and other applicable terms and conditions as the corresponding WDC RSUs immediately prior to the Spin-Off. F2 · balance_after: Includes 5,992 shares of Sandisk Common Stock acquired in connection with the spin-off from Western Digital Corporation ("WDC") effective February 21, 2025 (the "Spin-Off"), as further described in the Issuer's current report on Form 8-K filed on February 24, 2025, where each WDC shareholder received one-third (1/3) of one share of Sandisk Common Stock for each share of WDC common stock held. Such acquisition was exempt from Section 16 of the Securities Exchange Act of 1934, as amended("Exchange Act") pursuant to Rule 16a-9 under the Exchange Act. Read SEC document |
| November 20, 2024 Filed Nov 22, 2024 22:27 UTC | WESTERN DIGITAL CORP WDC · Entity 1010 | GrantCommon Stock | 3,759 | $0.00 | $0.00 |
DisclosureSEC source: 0001266824-24-000114 · edgardoc.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 21,737 F1 · security: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. Read SEC document |
| November 15, 2023 Filed Nov 16, 2023 22:02 UTC | WESTERN DIGITAL CORP WDC · Entity 1010 | GrantCommon Stock | 5,213 | $0.00 | $0.00 |
DisclosureSEC source: 0001266824-23-000107 · edgardoc.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 17,978 F1 · security: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. Read SEC document |
| November 16, 2022 Filed Nov 17, 2022 23:30 UTC | WESTERN DIGITAL CORP WDC · Entity 1010 | GrantCommon Stock | 6,589 | $0.00 | $0.00 |
DisclosureSEC source: 0001266824-22-000081 · edgardoc.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 12,765 F1 · security: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. Read SEC document |
| November 16, 2021 Filed Nov 18, 2021 01:48 UTC | WESTERN DIGITAL CORP WDC · Entity 1010 | GrantCommon Stock | 4,103 | $0.00 | $0.00 |
DisclosureSEC source: 0001266824-21-000073 · edgardoc.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,176 F1 · security: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. Read SEC document |
| July 06, 2021 Filed Jul 8, 2021 22:22 UTC | WESTERN DIGITAL CORP WDC · Entity 1010 | GrantCommon Stock | 2,073 | $0.00 | $0.00 |
DisclosureSEC source: 0001363249-21-000007 · edgardoc.xml · nonDerivative · entry 1 Caulfield Thomas · CIK 0001342570 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 2,073 F1 · security: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.