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
$948.5K
Companies
2
Total Filings
43
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 5
43 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2019-01-23 | PRTO | Grant (A) | — | $0 | EDGAR |
| 2019-01-03 | PRTO | Grant (A) | +2,448 | $4.7K | EDGAR |
| 2018-07-03 | PRTO | Grant (A) | −10,000 | -$16.1K | EDGAR |
| 2018-01-18 | PRTO | Grant (A) | — | $0 | EDGAR |
| 2018-01-03 | PRTO | Grant (A) | −3,934 | -$5.1K | EDGAR |
| 2017-12-18 | PRTO | Mixed | +8,666 | $22.6K | EDGAR |
| 2017-07-05 | PRTO | Grant (A) | −10,000 | -$13.0K | EDGAR |
| 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 |
Form 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.
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.
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.