Tunc Doluca
CIK 1183597 · President and CEO · last filed 2026-09-21
Tunc Doluca is a President and CEO who has filed 292 SEC Form 4 insider transactions across 3 companies since 2008. The most recent filing, for WDC, was dated Sep 21, 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 $36.9M 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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
MXIM price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
5601 GREAT OAKS PARKWAY
SAN JOSE, CA 95119
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| WDC | Director | 39,434 | $343.67 | $13.55M | $0 | 25 | 2026-09-21 |
| ADI | Director | 59,657 | $391.07 | $23.33M | -$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
292 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-09-21 | WDC | Grant (A) | — | $0 | EDGAR |
| 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 |
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.