Public ownership evidence

Western Digital Corp. (WDC) Ownership Disclosures

Read WDC insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-09-21T22:37:59.000Z

Recent Form 4 activity

2026-09-212026-09-17Tregillis Cynthia LA27.38Not reported
2026-09-212026-09-17Tan IrvingA83.3Not reported
2026-09-212026-09-17STREETER STEPHANIE AA0.56Not reported
2026-09-212026-09-17Shihab Ahmed MohammedA42.2Not reported
2026-09-212026-09-17Sennesael KrisA46.51Not reported
2026-09-212026-09-17Oulman RoxanneA0.56Not reported
2026-09-212026-09-17MASSENGILL MATTHEW EA10.27Not reported
2026-09-212026-09-17KIDDOO BRUCE EA0.56Not reported
2026-09-212026-09-17Gubbi Vidyadhara KA21.02Not reported
2026-09-212026-09-17Feller BradA4.24Not reported
2026-09-212026-09-17DOLUCA TUNCA0.56Not reported
2026-09-212026-09-17Davis Brian ScottA16.81Not reported
2026-09-212026-09-17Das ManuvirA0.27Not reported
2026-09-212026-09-17Cole Martin IA0.68Not reported
2026-09-212026-09-17Alexy KimberlyA0.56Not reported
2026-09-092026-09-04Tregillis Cynthia LS432Not reported
2026-09-092026-09-04Gubbi Vidyadhara KS1,795Not reported
2026-09-032026-09-01STREETER STEPHANIE AS1,600Not reported
2026-09-032026-08-31STREETER STEPHANIE AS2,000Not reported
2026-09-032026-08-31STREETER STEPHANIE AS2,000Not reported
2026-08-282026-08-27Tregillis Cynthia LS1,007Not reported
2026-08-282026-08-26Tregillis Cynthia LS476Not reported
2026-08-282026-08-25Tregillis Cynthia LA3,878Not reported
2026-08-282026-08-25Tan IrvingA16,548Not reported
2026-08-282026-08-25Shihab Ahmed MohammedA6,722Not reported
2026-08-282026-08-25Sennesael KrisA8,274Not reported
2026-08-282026-08-25Gubbi Vidyadhara KA5,171Not reported
2026-08-282026-08-25Feller BradA2,068Not reported
2026-08-282026-08-25Davis Brian ScottA3,619Not reported
2026-08-252026-08-24Tregillis Cynthia LS684Not reported
2026-08-252026-08-21Tregillis Cynthia LS235Not reported
2026-08-132026-08-11Tan IrvingS1,546Not reported
2026-08-132026-08-11Tan IrvingS6,445Not reported
2026-08-132026-08-11Tan IrvingS4,822Not reported
2026-08-132026-08-11Tan IrvingS1,880Not reported
2026-08-132026-08-11Tan IrvingS1,840Not reported
2026-08-132026-08-11Tan IrvingS989Not reported
2026-08-132026-08-11Tan IrvingS2,478Not reported
2026-07-302026-07-28Cole Martin IS32Not reported
2026-07-302026-07-28Cole Martin IS160Not reported
2026-07-302026-07-28Cole Martin IS199Not reported
2026-07-302026-07-28Cole Martin IS248Not reported
2026-07-302026-07-28Cole Martin IS529Not reported
2026-07-302026-07-28Cole Martin IS328Not reported
2026-07-302026-07-28Cole Martin IS312Not reported
2026-07-302026-07-28Cole Martin IS304Not reported
2026-07-302026-07-28Cole Martin IS128Not reported
2026-07-302026-07-28Cole Martin IS144Not reported
2026-07-302026-07-28Cole Martin IS106Not reported
2026-07-302026-07-28Cole Martin IS70Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

Cornerstone Financial Management LLC2026-06-302026-08-29175$111,776None
Cornerstone Financial Management LLC2026-03-312026-08-29127$34,352None
Cornerstone Financial Management LLC2025-12-312026-08-29116$19,983None
Deeter Investments LLP2025-12-312026-08-2961,314$10,562,563None
OPTIMIZE FINANCIAL INC.2026-06-302026-08-2811,387$7,273,105None
Advisors Asset Management, Inc.2021-12-312026-08-283,132$204,238None
Advisors Asset Management, Inc.2022-12-312026-08-282,190$69,095None
Advisors Asset Management, Inc.2020-06-302026-08-28205,431$9,069,779None
Advisors Asset Management, Inc.2021-09-302026-08-288,431$476,000None
Corient Private Wealth LP2026-06-302026-08-2843,886$28,030,917None
Corient Private Wealth LP2026-06-302026-08-287,657$4,891,051None
TUCKER ASSET MANAGEMENT LLC2026-06-302026-08-281,474$941,474None
TUCKER ASSET MANAGEMENT LLC2026-03-312026-08-28850$229,917None
Formuepleje A/S2026-06-302026-08-282,356$1,504,824None
Principia Wealth Advisory, LLC2026-06-302026-08-2724$15,329None
Principia Wealth Advisory, LLC2026-03-312026-08-2722$5,951None
Advisors Asset Management, Inc.2024-03-312026-08-27670$45,721None
Advisors Asset Management, Inc.2025-03-312026-08-272,059$83,245None
Advisors Asset Management, Inc.2020-12-312026-08-2783,949$4,650,000None
Advisors Asset Management, Inc.2021-03-312026-08-2726,837$1,791,370None
Advisors Asset Management, Inc.2021-06-302026-08-2716,148$1,149,000None
Advisors Asset Management, Inc.2020-09-302026-08-27134,646$4,921,311None
Advisors Asset Management, Inc.2025-09-302026-08-272,231$267,854None
Advisors Asset Management, Inc.2023-12-312026-08-27196$10,265None
Dakota Wealth Management2025-09-302026-08-273,348$401,961None
Dakota Wealth Management2025-12-312026-08-274,261$734,050None
Dakota Wealth Management2026-03-312026-08-272,340$632,956None
Advus Financial Partners, LLC2026-06-302026-08-263,572$2,281,508None
Advus Financial Partners, LLC2026-03-312026-08-264,002$1,082,501None
Advus Financial Partners, LLC2025-12-312026-08-262,730$470,297None
Groupe la Francaise2026-06-302026-08-267,674$4,901,537None
Advisors Asset Management, Inc.2019-12-312026-08-26336,601$21,364,065None
January Capital Advisors LLC2026-06-302026-08-26892$569,738None
TOBIAS FINANCIAL ADVISORS, INC.2026-06-302026-08-26683$436,246None
Kingsbury Capital Investment Advisors LLC2026-06-302026-08-26500$319,360None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-03-312026-08-2645,094$12,197,476None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-06-302026-08-2666,733$42,623,702None
Advisors Asset Management, Inc.2025-06-302026-08-251,978$126,572None
CYBER HORNET ETFs LLC2026-06-302026-08-25940$600,397None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25529,792$338,388,746None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25338,388,746$529,792,000None
Advisors Asset Management, Inc.2024-09-302026-08-221,418$96,835None
Advisors Asset Management, Inc.2024-06-302026-08-221,074$81,377None
Advisors Asset Management, Inc.2024-12-312026-08-221,760$104,949None
Advisors Asset Management, Inc.2025-12-312026-08-223,030$521,978None
Advisors Asset Management, Inc.2020-03-312026-08-22270,615$11,262,996None
WEST MICHIGAN ADVISORS, LLC2026-06-302026-08-228,277$5,286,877None
Assenagon Asset Management S.A.2026-06-302026-08-2218,844$12,036,040None
Harvest Fund Management Co., Ltd2026-06-302026-08-2165,829$42,036,000None
Rehmann Capital Advisory Group2026-06-302026-08-21435$277,912None

90-day public filing window, up to 50 source positions.

Recent Congressional disclosures

Ro Khanna2026-10-082026-09-25purchase$1,001 - $15,000

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.