DAVID P SOUTHWELL
CIK 1251553 · Chief Executive Officer · last filed 2026-01-06
"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
$2.11M
Companies
10
Total Filings
76
Lifetime Open-Market Net
-$10.15M
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 |
|---|---|---|---|---|---|---|---|
| PTCT | Director | 22,500 | $75.14 | $1.69M | -$4.61M | 22 | 2026-01-06 |
| RCKTW | Director | 144,784 | $0.01 | $1.4K | -$1.95M | 5 | 2025-07-18 |
| TCRX | Chief Executive Officer | 171,569 | $0.91 | $156.5K | $185.9K | 6 | 2023-02-06 |
| RCKT | Director | 95,160 | $2.75 | $261.7K | -$1.46M | 7 | 2022-06-15 |
| SPRO | Director | — | $2.85 | — | $0 | 2 | 2018-06-06 |
| ROCKET PHARMACEUTICALS, INC. (ITEK) Delisted | President and CEO | 62,765 | — | — | $105.0K | 4 | 2017-01-24 |
| HUMAN GENOME SCIENCES INC (HGSI) Delisted | Chief Financial Officer | 0 | — | — | $52.3K | 10 | 2012-08-01 |
| First Eagle Alternative Capital BDC, Inc. (TCRD) Delisted | Director | 38,500 | — | — | $493.6K | 6 | 2010-12-07 |
| BIOSPHERE MEDICAL INC (BSMD) Delisted | Director | 0 | — | — | $0 | 5 | 2010-09-10 |
| SEPRACOR INC /DE/ (SEPR) Delisted | Chief Financial Officer | 143,728 | — | — | -$2.97M | 9 | 2007-09-12 |
Recent Filings · Page 7 of 8
76 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2009-05-22 | BIOSPHERE MEDICAL INC (BSMD) Delisted | Exer (M) | +2,000 | $1.6K | EDGAR |
| 2009-05-15 | BIOSPHERE MEDICAL INC (BSMD) Delisted | Grant (A) | +2,500 | $25 | EDGAR |
| 2009-05-08 | HUMAN GENOME SCIENCES INC (HGSI) Delisted | Grant (A) | — | $0 | EDGAR |
| 2009-03-16 | HUMAN GENOME SCIENCES INC (HGSI) Delisted | Buy (P) | +73,000 | $52.3K | EDGAR |
| 2008-07-24 | HUMAN GENOME SCIENCES INC (HGSI) Delisted | Grant (A) | — | $0 | EDGAR |
| 2008-05-16 | BIOSPHERE MEDICAL INC (BSMD) Delisted | Grant (A) | +2,500 | $25 | EDGAR |
| 2007-09-12 | SEPRACOR INC /DE/ (SEPR) Delisted | Sell (S) | −21,189 | -$584.2K | EDGAR |
| 2007-09-12 | SEPRACOR INC /DE/ (SEPR) Delisted | Sell (S) | −8,300 | -$232.3K | EDGAR |
| 2007-09-12 | SEPRACOR INC /DE/ (SEPR) Delisted | Mixed | +29,489 | -$247.7K | EDGAR |
| 2007-09-06 | SEPRACOR INC /DE/ (SEPR) Delisted | Sell (S) | −17,096 | -$499.7K | EDGAR |
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.