MICHAEL THOMAS HENDERSON
CIK 1779990 · Chief Executive Officer · last filed 2026-07-10
"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
$153.88M
Companies
4
Total Filings
70
Lifetime Open-Market Net
-$49.55M
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.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| APGE | Chief Executive Officer | 920,941 | $134.17 | $123.56M | -$37.96M | 25 | 2026-07-10 |
| SYRE | Director | 68,606 | $99.96 | $6.86M | -$7.95M | 7 | 2026-06-23 |
| ARYA Sciences Acquisition Corp IV (ARYD) Delisted | Director | — | $6.64 | — | $0 | 1 | 2024-07-31 |
| BBIO | Chief Business Officer | 274,211 | $85.55 | $23.46M | -$3.64M | 22 | 2020-12-17 |
Recent Filings · Page 2 of 7
70 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 |
|---|---|---|---|---|---|
| 2026-05-08 | SYRE | Sell (S) | −80,000 | -$5.95M | EDGAR |
| 2026-04-20 | APGE | Exer (M) | +3,000 | $68.6K | EDGAR |
| 2026-04-10 | APGE | Sell (S) | −20,000 | -$1.65M | EDGAR |
| 2026-03-13 | APGE | Sell (S) | −20,000 | -$1.50M | EDGAR |
| 2026-02-13 | APGE | Sell (S) | −20,000 | -$1.27M | EDGAR |
| 2026-02-11 | APGE | Notice (144) | −60,000 | -$3.84M | EDGAR |
| 2026-01-23 | SYRE | Other (J) | +63,227 | $0 | EDGAR |
| 2026-01-16 | APGE | Sell (S) | −20,000 | -$1.62M | EDGAR |
| 2026-01-06 | APGE | Grant (A) | — | $0 | EDGAR |
| 2025-12-12 | APGE | Sell (S) | −20,000 | -$1.51M | 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.