DAVID P SOUTHWELL
CIK 1251553 · Chief Executive Officer · last filed 2026-07-06
"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
$2.36M
Companies
10
Total Filings
82
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 |
|---|---|---|---|---|---|---|---|
| RCKT | Director | 167,646 | $3.14 | $526.4K | -$1.46M | 8 | 2026-07-06 |
| PTCT | Director | 22,500 | $75.39 | $1.70M | -$4.61M | 22 | 2026-01-06 |
| RCKTW | Director | 144,784 | $0.00 | $478 | -$1.95M | 5 | 2025-07-18 |
| TCRX | Chief Executive Officer | 171,569 | $0.77 | $132.8K | $185.9K | 6 | 2023-02-06 |
| SPRO | Director | — | $1.20 | — | $0 | 2 | 2018-06-06 |
| ROCKET PHARMACEUTICALS, INC. (ITEK) Delisted | President and CEO | 15,691 | — | — | $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 2 of 9
82 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 |
|---|---|---|---|---|---|
| 2024-04-15 | RCKT | Notice (144) | −10,000 | -$240.5K | EDGAR |
| 2024-04-12 | RCKT | Notice (144) | −70,000 | -$1.71M | EDGAR |
| 2024-02-16 | PTCT | Grant (A) | +4,000 | $0 | EDGAR |
| 2023-06-26 | RCKTW | Grant (A) | — | $0 | EDGAR |
| 2023-05-15 | TCRX | Notice (144) | −85,911 | -$346.2K | EDGAR |
| 2023-04-19 | PTCT | Mixed | — | -$377.4K | EDGAR |
| 2023-04-17 | PTCT | Notice (144) | −11,429 | -$583.2K | EDGAR |
| 2023-04-04 | PTCT | Mixed | — | -$82.4K | EDGAR |
| 2023-03-29 | PTCT | Mixed | — | -$180.5K | EDGAR |
| 2023-02-06 | TCRX | Grant (A) | — | $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.