Steven Keith Burke
CIK 1619834 · SVP, Chief Medical Officer · last filed 2026-02-04
"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.
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Disclosed Exposure
$4.44M
Companies
2
Total Filings
36
Lifetime Open-Market Net
-$341.6K
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Recent Filings · Page 4 of 4
36 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2017-03-13 | PRTO | Exer (M) | +70,221 | $102.8K | EDGAR |
| 2017-01-26 | PRTO | Grant (A) | — | $0 | EDGAR |
| 2016-12-06 | PRTO | Gift (G) | −2,500 | $0 | EDGAR |
| 2015-12-10 | PRTO | Grant (A) | — | $0 | EDGAR |
| 2015-07-08 | PRTO | Grant (A) | +2,403 | $21.2K | EDGAR |
| 2015-01-08 | PRTO | Grant (A) | — | $0 | EDGAR |
Showing 31–36 of 36
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Page 4 of 4
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.