Irving Tan
CIK 1729518 · Chief Executive Officer · last filed 2026-09-21
Irving Tan is a Chief Executive Officer who has filed 100 SEC Form 4 insider transactions across 4 companies since 2018. The most recent filing, for WDC, was dated Sep 21, 2026. Across all open-market trades the lifetime net is −$36.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $181.9M across reported positions. 36 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.
WDC 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 | Chief Executive Officer | 475,703 | $343.67 | $163.49M | -$26.46M | 30 | 2026-09-21 |
| SWP | Director | 6,033 | $27.17 | $163.9K | $0 | 13 | 2024-03-21 |
| STANLEY BLACK & DECKER, INC. (SWT) Delisted | Director | 3,432 | $51.06 | $175.2K | $0 | 21 | 2022-09-22 |
| CSCO | EVP, Chief of Operations | 171,379 | $106.50 | $18.25M | -$10.35M | 30 | 2020-11-24 |
Recent Filings
100 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-09-21 | WDC | Mixed | −1,034 | -$481.5K | EDGAR |
| 2026-09-02 | WDC | Mixed | — | $0 | EDGAR |
| 2026-08-27 | WDC | Mixed | +12,832 | -$1.77M | EDGAR |
| 2026-08-24 | WDC | Mixed | −651 | -$317.9K | EDGAR |
| 2026-08-12 | WDC | Sell (S) | −20,000 | -$8.90M | EDGAR |
| 2026-08-11 | WDC | Notice (144) | −20,000 | -$8.90M | EDGAR |
| 2026-06-22 | WDC | Mixed | −1,038 | -$813.4K | EDGAR |
| 2026-05-27 | WDC | Mixed | −449 | -$232.0K | EDGAR |
| 2026-05-22 | WDC | Mixed | −697 | -$352.2K | EDGAR |
| 2026-05-05 | WDC | Sell (S) | −20,000 | -$8.24M | 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.