DAVID C STUMP
CIK 1191235 · Exec. Vice President · last filed 2026-06-02
"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
$384.7K
Companies
5
Total Filings
66
Lifetime Open-Market Net
-$3.82M
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 |
|---|---|---|---|---|---|---|---|
| RGNX | Director | 28,861 | $11.28 | $325.6K | $0 | 12 | 2026-06-02 |
| MGNX | Director | 14,750 | $4.01 | $59.1K | $0 | 14 | 2026-05-20 |
| PORTOLA PHARMACEUTICALS INC (PTLA) Delisted | Director | 0 | — | — | $0 | 7 | 2020-07-02 |
| Viracta Therapeutics, Inc. (SNSS) Delisted | Director | — | $18.62 | — | $0 | 15 | 2020-07-01 |
| HUMAN GENOME SCIENCES INC (HGSI) Delisted | Exec. Vice President | 0 | — | — | -$3.82M | 12 | 2012-08-01 |
Recent Filings · Page 2 of 7
66 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 |
|---|---|---|---|---|---|
| 2022-05-23 | MGNX | Grant (A) | — | $0 | EDGAR |
| 2021-06-08 | RGNX | Grant (A) | — | $0 | EDGAR |
| 2021-05-17 | MGNX | Grant (A) | — | $0 | EDGAR |
| 2020-07-02 | PORTOLA PHARMACEUTICALS INC (PTLA) Delisted | Disp (D) | −20,475 | -$368.6K | EDGAR |
| 2020-07-01 | Viracta Therapeutics, Inc. (SNSS) Delisted | Grant (A) | — | $0 | EDGAR |
| 2020-06-15 | PORTOLA PHARMACEUTICALS INC (PTLA) Delisted | Grant (A) | +7,281 | $0 | EDGAR |
| 2020-06-02 | RGNX | Grant (A) | — | $0 | EDGAR |
| 2020-05-15 | MGNX | Grant (A) | — | $0 | EDGAR |
| 2019-07-02 | Viracta Therapeutics, Inc. (SNSS) Delisted | Grant (A) | — | $0 | EDGAR |
| 2019-06-17 | PORTOLA PHARMACEUTICALS INC (PTLA) Delisted | Grant (A) | +4,194 | $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.