Thomas A. West
CIK 1620705 · President and CEO · last filed 2026-07-30
Thomas A. West is a President and CEO who has filed 30 SEC Form 4 insider transactions across 6 companies since 2014. The most recent filing, for CBLL, was dated Jul 30, 2026. Across all open-market trades the lifetime net is +$161.4K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $1.5M across reported positions.
"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.
XENT 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
1555 ADAMS DRIVE
MENLO PARK, CA 94025
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CBLL | Director | 16,011 | $26.96 | $431.7K | $0 | 1 | 2026-07-30 |
| SIBN | Director | 37,947 | $20.22 | $767.3K | $0 | 4 | 2026-06-08 |
| INGN | Director | 40,677 | $6.87 | $279.5K | $0 | 3 | 2024-06-07 |
| OFIX | Director | 6,543 | $8.75 | $57.3K | $0 | 2 | 2022-06-08 |
| Intersect ENT, Inc. (XENT) Delisted | President and CEO | 0 | $28.24 | $0 | $161.4K | 9 | 2022-05-16 |
| HOLOGIC INC (HOLX) Delisted | Div President & GM, Diagnostic | 55,753 | $76.01 | $4.24M | $0 | 11 | 2018-12-04 |
Recent Filings
30 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-07-30 | CBLL | Grant (A) | +16,011 | $0 | EDGAR |
| 2026-06-08 | SIBN | Grant (A) | +10,957 | $0 | EDGAR |
| 2025-06-06 | SIBN | Grant (A) | +8,675 | $0 | EDGAR |
| 2024-06-27 | SIBN | Grant (A) | +8,791 | $0 | EDGAR |
| 2024-06-27 | SIBN | Grant (A) | +18,315 | $0 | EDGAR |
| 2024-06-07 | INGN | Grant (A) | +21,871 | $0 | EDGAR |
| 2023-06-02 | INGN | Grant (A) | +17,094 | $0 | EDGAR |
| 2023-04-04 | INGN | Grant (A) | +1,712 | $0 | EDGAR |
| 2022-06-08 | OFIX | Grant (A) | +6,383 | $0 | EDGAR |
| 2022-05-16 | Intersect ENT, Inc. (XENT) Delisted | U | −351,748 | -$9.94M | 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.