David S Wichmann
CIK 1268489 · Chief Executive Officer · last filed 2026-05-11
David S Wichmann is a Chief Executive Officer who has filed 115 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing, for BSX, was dated May 11, 2026. Across all open-market trades the lifetime net is −$79.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $427.3M across reported positions. 84 SEC filings were submitted jointly with UNITEDHEALTH GROUP 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.
UNH 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
300 BOSTON SCIENTIFIC WAY
MARLBOROUGH, MA 01752
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| BSX | Director | 45,382 | $45.05 | $2.04M | $1.05M | 8 | 2026-05-11 |
| PRVA | Director | 1,341,049 | $22.44 | $30.09M | $0 | 3 | 2025-05-23 |
| UNH | Chief Executive Officer | 968,580 | $406.88 | $394.10M | -$80.15M | 91 | 2020-12-17 |
| TNC | Director | 16,472 | $64.57 | $1.06M | -$233.0K | 13 | 2020-12-07 |
Recent Filings
115 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-11 | BSX | Grant (A) | +3,800 | $0 | EDGAR |
| 2025-05-23 | PRVA | Grant (A) | +8,396 | $0 | EDGAR |
| 2025-05-09 | BSX | Grant (A) | +2,081 | $0 | EDGAR |
| 2024-05-23 | PRVA | Grant (A) | +11,124 | $0 | EDGAR |
| 2024-05-13 | BSX | Grant (A) | +2,901 | $0 | EDGAR |
| 2023-08-03 | PRVA | Grant (A) | +6,189 | $0 | EDGAR |
| 2023-05-05 | BSX | Grant (A) | +3,946 | $0 | EDGAR |
| 2023-04-04 | BSX | Grant (A) | +41 | $0 | EDGAR |
| 2022-05-06 | BSX | Grant (A) | +7,613 | $0 | EDGAR |
| 2021-11-16 | BSX | Buy (P) | +25,000 | $1.05M | 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.