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WESTERN DIGITAL CORP

CIK 106040 · last filed 2025-06-09

WESTERN DIGITAL CORP is a corporate insider who has filed 7 SEC Form 4 insider transactions across 2 companies since 2025. The most recent filing, for SNDKV, was dated Jun 9, 2025. Current disclosed insider exposure totals $3.32B across reported positions. The firm reports its address in San Jose, CA. 114 SEC filings were submitted jointly with MICHAEL CHARLES RAY.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$3.32B

Companies

2

Total Filings

7

Lifetime Open-Market Net

$0

Filer Profile

Reported Address
5601 GREAT OAKS PARKWAY
SAN JOSE, CA 95119
Phone
(408) 717-6000
State of Incorporation
DE
Related Filers
MICHAEL CHARLES RAY — 114 joint filings, latest 2024-02-15
MICHAEL D CORDANO — 111 joint filings, latest 2020-02-14
STEPHEN D MILLIGAN — 108 joint filings, latest 2020-04-21
MATTHEW E MASSENGILL — 101 joint filings, latest 2026-06-22
KATHLEEN A COTE — 92 joint filings, latest 2020-11-19
Gene M. Zamiska — 84 joint filings, latest 2025-11-26
Srinivasan Sivaram — 61 joint filings, latest 2023-09-06
THOMAS E PARDUN — 54 joint filings, latest 2015-11-05
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
Sandisk Corp (SNDKV) Delisted 10%+ Owner 7,513,019 — — $0 4 2025-06-09
WDC 10%+ Owner 7,513,019 $441.57 $3.32B $0 3 2025-06-09

Recent Filings

7 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2025-06-09 Sandisk Corp (SNDKV) Delisted Other (J) +21,314,768 $0 EDGAR
2025-06-09 WDC Other (J) +21,314,768 $0 EDGAR
2025-06-09 Sandisk Corp (SNDKV) Delisted Other (J) −21,314,768 $0 EDGAR
2025-02-25 Sandisk Corp (SNDKV) Delisted Other (J) −116,035,464 $0 EDGAR
2025-02-25 WDC Other (J) −116,035,464 $0 EDGAR
2025-02-14 Sandisk Corp (SNDKV) Delisted Grant (A) +29,863,251 $0 EDGAR
2025-02-14 WDC Grant (A) +29,863,251 $0 EDGAR
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.