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TUNC DOLUCA

CIK 1183597 · President and CEO · last filed 2026-06-22

TUNC DOLUCA is a President and CEO who has filed 291 SEC Form 4 insider transactions across 3 companies since 2008. The most recent filing, for WDC, was dated Jun 22, 2026. Across all open-market trades the lifetime net is −$96.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $38.7M across reported positions. 25 SEC filings were submitted jointly with WESTERN DIGITAL CORP.

"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

$38.68M

Companies

3

Total Filings

291

Lifetime Open-Market Net

-$96.31M

Filer Profile

Reported Address
C/O WESTERN DIGITAL CORPORATION
5601 GREAT OAKS PARKWAY
SAN JOSE, CA 95119
Related Filers
WESTERN DIGITAL CORP — 25 joint filings, latest 2026-06-22
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
WDC Director 39,434 $441.57 $17.41M $0 24 2026-06-22
ADI Director 59,657 $356.50 $21.27M -$22.34M 34 2023-03-02
MAXIM INTEGRATED PRODUCTS INC (MXIM) Delisted PRESIDENT, CEO & DIRECTOR 1,029,058 $103.14 $106.14M -$73.97M 229 2021-08-24

Recent Filings

291 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
2026-06-22 WDC Grant (A) — $0 EDGAR
2026-03-19 WDC Grant (A) — $0 EDGAR
2025-12-22 WDC Grant (A) — $0 EDGAR
2025-11-21 WDC Mixed +1,599 $0 EDGAR
2025-09-22 WDC Grant (A) — $0 EDGAR
2025-06-23 WDC Grant (A) — $0 EDGAR
2024-11-22 WDC Grant (A) +3,759 $0 EDGAR
2023-11-16 WDC Grant (A) +5,213 $0 EDGAR
2023-07-03 ADI Notice (144) −2,000 -$389.6K EDGAR
2023-06-01 ADI Notice (144) −2,000 -$355.4K EDGAR
Showing 1–10 of 291
Page 1 of 30
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.