Pfeiffenberger Brent — SEC Form 4 filings
SEC reporting owner CIK 2001162. 25 Form 4 filings on record with FilingPulse; latest filed 2026-09-15.
Transaction summary — filings shown
Covers all 25 filings on record, filed 2024-03-11 to 2026-09-15. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 2 legs across 2 filings — 87,000 shares, $47,681 total (shares × price as filed).
- Open-market sales (code S, non-derivative): 6 legs across 6 filings — 99,918 shares, $59,964 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 22.
- Largest priced transaction: purchase of 52,000 shares @ $0.58 ($30,352) in Century Therapeutics, Inc., filed 2025-12-16.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Century Therapeutics, Inc. (IPSC) | President and CEO, Director | 22 | 2 legs · 87,000 sh · $47,681 | 6 legs · 99,918 sh · $59,964 | 18 |
| Butterfly Network, Inc. (BFLY) | President and CEO, Director | 2 | — | — | 2 |
| Corbus Pharmaceuticals Holdings, Inc. (CRBP) | Director | 1 | — | — | 2 |
Form 4 filings — Pfeiffenberger Brent
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-15 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 13,850 @ $1.94 | EDGAR |
| 2026-09-09 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 463 @ $2.11 | EDGAR |
| 2026-08-18 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 31,172 @ $1.92 | EDGAR |
| 2026-06-15 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 13,849 @ $2.24 | EDGAR |
| 2026-06-09 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 463 @ $2.13 | EDGAR |
| 2026-05-21 | 4 | Corbus Pharmaceuticals Holdings, Inc. (CRBP) | Grant/award (A): 7,500 @ $0 · Grant/award (A): 24,700 (derivative) @ $0 | EDGAR |
| 2026-05-19 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 31,172 @ $2.34 | EDGAR |
| 2026-03-13 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 55,397 @ $2.73 | EDGAR |
| 2026-03-10 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 463 @ $2.56 | EDGAR |
| 2026-02-18 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 31,172 @ $1.75 | EDGAR |
| 2026-02-04 | 4 | Century Therapeutics, Inc. (IPSC) | Grant/award (A): 475,000 @ $0 · Grant/award (A): 945,000 (derivative) @ $0 | EDGAR |
| 2025-12-16 | 4 | Century Therapeutics, Inc. (IPSC) | Purchase (P): 52,000 @ $0.58 | EDGAR |
| 2025-12-12 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 463 @ $0.53 | EDGAR |
| 2025-11-20 | 4 | Century Therapeutics, Inc. (IPSC) | Purchase (P): 35,000 @ $0.50 | EDGAR |
| 2025-11-19 | 4 | Century Therapeutics, Inc. (IPSC) | Sale (S): 32,456 @ $0.45 | EDGAR |
| 2025-09-10 | 4 | Century Therapeutics, Inc. (IPSC) | Sale (S): 488 @ $0.50 | EDGAR |
| 2025-08-18 | 4 | Century Therapeutics, Inc. (IPSC) | Grant/award (A): 1,587,614 @ $0 | EDGAR |
| 2025-06-11 | 4 | Century Therapeutics, Inc. (IPSC) | Sale (S): 475 @ $0.62 | EDGAR |
| 2025-05-20 | 4 | Century Therapeutics, Inc. (IPSC) | Sale (S): 29,552 @ $0.55 | EDGAR |
| 2025-03-12 | 4 | Century Therapeutics, Inc. (IPSC) | Sale (S): 2,235 @ $0.61 · Grant/award (A): 521,500 @ $0 · Grant/award (A): 521,500 (derivative) @ $0 | EDGAR |
| 2025-02-20 | 4 | Century Therapeutics, Inc. (IPSC) | Sale (S): 34,712 @ $0.78 | EDGAR |
| 2024-12-06 | 4 | Century Therapeutics, Inc. (IPSC) | Tax withholding (F): 243,447 @ $1.44 | EDGAR |
| 2024-05-24 | 4/A | Butterfly Network, Inc. (BFLY) | Holdings only — no transactions reported | EDGAR |
| 2024-03-18 | 4 | Century Therapeutics, Inc. (IPSC) | Grant/award (A): 17,425 @ $0 · Grant/award (A): 104,550 (derivative) @ $0 | EDGAR |
| 2024-03-11 | 4 | Butterfly Network, Inc. (BFLY) | Grant/award (A): 17,425 @ $0 · Grant/award (A): 104,550 (derivative) @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
Need this as JSON?
GET https://api.filingpulse.io/v1/insider-trades?owner_cik=2001162 returns every filing on this page — normalized, with footnotes and derivative legs — and webhooks push new filings to you in seconds. API docs →