6 insiders reported 226 Form 4 transactions for Sensei Biotherapeutics, Inc. (SNSE) over the past 18 months (most recent 2026-06-01). Recent activity: Peyer James (10% Owner) Sell 24,524 shares, Cambrian BioPharma Inc (10% Owner) Sell 24,524 shares, Cambrian BioPharma Inc (10% Owner) Sell 476 shares, Peyer James (10% Owner) Sell 476 shares, MILLENNIUM GROUP MANAGEMENT LLC (10% Owner) Buy 778 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-01 | Peyer James | 10% Owner | Sell | 24,524 | $490,480 |
| 2026-06-01 | Cambrian BioPharma Inc | 10% Owner | Sell | 24,524 | $490,480 |
| 2026-06-01 | Cambrian BioPharma Inc | 10% Owner | Sell | 476 | $10,063 |
| 2026-06-01 | Peyer James | 10% Owner | Sell | 476 | $10,063 |
| 2026-05-15 | MILLENNIUM GROUP MANAGEMENT LLC | 10% Owner | Buy | 778 | $21,182 |
| 2026-05-15 | ICS OPPORTUNITIES II LLC | 10% Owner | Buy | 778 | $21,182 |
| 2026-05-15 | ENGLANDER ISRAEL A | 10% Owner | Buy | 778 | $21,182 |
| 2026-05-15 | ICS OPPORTUNITIES II LLC | 10% Owner | Buy | 26 | $870 |
| 2026-05-15 | MILLENNIUM MANAGEMENT LLC | 10% Owner | Buy | 26 | $870 |
| 2026-05-15 | ICS OPPORTUNITIES II LLC | 10% Owner | Buy | 616 | $15,206 |
| 2026-05-15 | MILLENNIUM GROUP MANAGEMENT LLC | 10% Owner | Buy | 26 | $870 |
| 2026-05-15 | MILLENNIUM GROUP MANAGEMENT LLC | 10% Owner | Buy | 616 | $15,206 |
| 2026-05-15 | ENGLANDER ISRAEL A | 10% Owner | Buy | 616 | $15,206 |
| 2026-05-15 | MILLENNIUM MANAGEMENT LLC | 10% Owner | Buy | 778 | $21,182 |
| 2026-05-15 | MILLENNIUM MANAGEMENT LLC | 10% Owner | Buy | 616 | $15,206 |
| 2026-05-15 | ENGLANDER ISRAEL A | 10% Owner | Buy | 26 | $870 |
| 2026-05-15 | ICS OPPORTUNITIES II LLC | 10% Owner | Buy | 1,327 | $37,085 |
| 2026-05-15 | ICS OPPORTUNITIES II LLC | 10% Owner | Buy | 1,276 | $44,344 |
| 2026-05-15 | MILLENNIUM GROUP MANAGEMENT LLC | 10% Owner | Buy | 1,770 | $44,818 |
| 2026-05-15 | MILLENNIUM GROUP MANAGEMENT LLC | 10% Owner | Buy | 1,276 | $44,344 |
| 2026-05-15 | MILLENNIUM MANAGEMENT LLC | 10% Owner | Buy | 1,276 | $44,344 |
| 2026-05-15 | MILLENNIUM MANAGEMENT LLC | 10% Owner | Buy | 1,770 | $44,818 |
| 2026-05-15 | MILLENNIUM GROUP MANAGEMENT LLC | 10% Owner | Buy | 1,327 | $37,085 |
| 2026-05-15 | ENGLANDER ISRAEL A | 10% Owner | Buy | 1,276 | $44,344 |
| 2026-05-15 | ENGLANDER ISRAEL A | 10% Owner | Buy | 1,770 | $44,818 |
Source: SEC Form 4 filings · as of 2026-06-01