Thomas S. Lam
CIK 1664499 · President and Co-CEO · last filed 2026-10-08
Thomas S. Lam is a President and Co-CEO who has filed 35 SEC Form 4 insider transactions across 2 companies since 2016. The most recent filing shows the insider had shares withheld for taxes covering $97.1K of ASTH on Oct 8, 2026. Across all open-market trades the lifetime net is +$796.9K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $245.6M across reported positions. 3 SEC filings were submitted jointly with ALLIED PHYSICIANS OF CALIFORNIA, A PROFESSIONAL MEDICAL 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.
AMEH 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
ALHAMBRA, CA 91801
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ASTH | Director | 6,595,835 | $37.23 | $245.56M | $0 | 9 | 2026-10-08 |
| Astrana Health, Inc. (AMEH) Delisted | President and Co-CEO | 1,489,329 | $40.82 | $60.79M | $796.9K | 26 | 2023-12-18 |
Recent Filings
35 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-10-08 | ASTH | Tax (F) | −2,624 | -$97.1K | EDGAR |
| 2026-04-08 | ASTH | Grant (A) | +41,667 | $0 | EDGAR |
| 2026-03-09 | ASTH | Tax (F) | −9,266 | -$232.3K | EDGAR |
| 2025-12-10 | ASTH | Mixed | +3,636 | -$44.5K | EDGAR |
| 2025-03-07 | ASTH | Tax (F) | −9,235 | -$251.1K | EDGAR |
| 2025-02-18 | ASTH | Other (J) | −673,664 | $0 | EDGAR |
| 2025-01-22 | ASTH | Disp (D) | −900,000 | -$31.65M | EDGAR |
| 2024-11-12 | ASTH | Grant (A) | +40,000 | $0 | EDGAR |
| 2024-09-11 | ASTH | Mixed | +17,000 | $30 | EDGAR |
| 2023-12-18 | Astrana Health, Inc. (AMEH) Delisted | Grant (A) | +90,000 | $0 | 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.