Thomas Sonderman
CIK 1611597 · CEO · last filed 2026-07-31
Thomas Sonderman is a CEO who has filed 52 SEC Form 4 insider transactions across 2 companies since 2014. The most recent filing, for SKYT, was dated Jul 31, 2026. Across all open-market trades the lifetime net is −$2.0M, making them a net seller over the disclosed history. 15 SEC filings were submitted jointly with RUDOLPH TECHNOLOGIES INC.
"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.
SKYT 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
WILMINGTON, MA 01887
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SkyWater Technology, Inc (SKYT) Delisted | CEO | 0 | $32.46 | $0 | -$1.96M | 32 | 2026-07-31 |
| RUDOLPH TECHNOLOGIES INC (RTEC) Delisted | 20,099 | — | — | -$13.2K | 13 | 2017-07-12 |
Recent Filings
52 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-07-31 | SkyWater Technology, Inc (SKYT) Delisted | Disp (D) | −553,244 | $0 | EDGAR |
| 2026-03-18 | SkyWater Technology, Inc (SKYT) Delisted | Tax (F) | −13,201 | -$367.8K | EDGAR |
| 2026-03-17 | SkyWater Technology, Inc (SKYT) Delisted | Grant (A) | +50,455 | $0 | EDGAR |
| 2026-02-19 | SkyWater Technology, Inc (SKYT) Delisted | Tax (F) | −5,767 | -$165.9K | EDGAR |
| 2025-11-25 | SkyWater Technology, Inc (SKYT) Delisted | Sell (S) | −5,210 | -$69.7K | EDGAR |
| 2025-11-21 | SkyWater Technology, Inc (SKYT) Delisted | Notice (144) | −5,210 | -$69.7K | EDGAR |
| 2025-11-18 | SkyWater Technology, Inc (SKYT) Delisted | Sell (S) | −5,207 | -$88.5K | EDGAR |
| 2025-11-14 | SkyWater Technology, Inc (SKYT) Delisted | Notice (144) | −5,207 | -$88.5K | EDGAR |
| 2025-09-11 | SkyWater Technology, Inc (SKYT) Delisted | Sell (S) | −8,355 | -$88.4K | EDGAR |
| 2025-09-10 | SkyWater Technology, Inc (SKYT) Delisted | Notice (144) | −8,355 | -$88.4K | 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.