David Brent Shafer
CIK 1728374 · Interim CEO and Chair · last filed 2026-06-15
David Brent Shafer is an Interim CEO and Chair who has filed 30 SEC Form 4 insider transactions across 4 companies since 2018. The most recent filing, for VCYT, was dated Jun 15, 2026. Across all open-market trades the lifetime net is −$13.5M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $4.7M across reported positions. 8 SEC filings were submitted jointly with BAXTER INTERNATIONAL 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.
CERN 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
DEERFIELD, IL 60015
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| VCYT | Director | 31,100 | $50.28 | $1.56M | $0 | 3 | 2026-06-15 |
| TCMD | Director | 55,343 | $23.46 | $1.30M | $0 | 6 | 2026-05-08 |
| BAX | Interim CEO and Chair | 72,804 | $24.92 | $1.81M | $0 | 6 | 2026-05-07 |
| CERNER Corp (CERN) Delisted | Chairman and CEO | 366 | $94.92 | $34.7K | -$13.48M | 15 | 2021-05-11 |
Recent Filings
30 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-15 | VCYT | Grant (A) | +5,272 | $0 | EDGAR |
| 2026-05-08 | TCMD | Grant (A) | +6,521 | $0 | EDGAR |
| 2026-05-07 | BAX | Grant (A) | +12,836 | $0 | EDGAR |
| 2025-08-21 | BAX | Tax (F) | −31,337 | -$762.4K | EDGAR |
| 2025-06-23 | VCYT | Grant (A) | +9,321 | $0 | EDGAR |
| 2025-05-09 | TCMD | Grant (A) | +16,078 | $0 | EDGAR |
| 2025-02-06 | BAX | Grant (A) | +76,289 | $0 | EDGAR |
| 2024-09-04 | VCYT | Grant (A) | +16,507 | $0 | EDGAR |
| 2024-05-10 | TCMD | Grant (A) | +10,469 | $0 | EDGAR |
| 2024-05-09 | BAX | Grant (A) | +5,952 | $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.