Peter Feinberg
Insider
First SEC filing: Sept. 13, 2021 · Latest: June 11, 2026
Insider at
Insider transactions
1 buys (P)
0 sells (S)
Net: $87,000
Avg return of open purchases vs now: -6.4%
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 11, 2026 | IMRX | A | 33,350 | · | · | 33,350 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 12, 2026 | IMRX | P | 20,000 | $4.35 | $87,000 | 135,441 Indirect | +17.32% | Acquired | -6.4% (price as of 2026-10-02) |
| Jan. 1, 2026 | IMRX | A | 7,888 | · | · | 7,888 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 3, 2025 | IMRX | P | 7,500 | $6.67 | $50,025 | 156,766 Direct | +5.02% | Acquired | -39.0% (price as of 2026-10-02) |
| Sept. 30, 2025 | IMRX | P | 7,500 | $7.03 | $52,725 | 149,266 Direct | +5.29% | Acquired | -42.1% (price as of 2026-10-02) |
| Sept. 29, 2025 | IMRX | P | 5,000 | $7.18 | $35,900 | 141,766 Direct | +3.66% | Acquired | -43.3% (price as of 2026-10-02) |
| June 18, 2025 | IMRX | P | 25,000 | $2.53 | $63,250 | 136,766 Direct | +22.37% | Acquired | 60.9% (price as of 2026-10-02) |
| June 13, 2025 | IMRX | A | 33,350 | · | · | 33,350 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 1, 2025 | IMRX | A | 23,485 | · | · | 23,485 Direct | · | Acquired | (price as of 2026-10-02) |
| June 12, 2024 | IMRX | A | 33,350 | · | · | 33,350 Direct | · | Acquired | (price as of 2026-10-02) |
| March 22, 2024 | IMRX | P | 25,000 | $2.55 | $63,750 | 111,766 Direct | +28.81% | Acquired | 59.6% (price as of 2026-10-02) |
| March 19, 2024 | IMRX | P | 25,000 | $2.56 | $64,000 | 86,766 Direct | +40.48% | Acquired | 59.0% (price as of 2026-10-02) |
| March 18, 2024 | IMRX | P | 45,024 | $2.31 | $104,005 | 56,790 Direct | +382.66% | Acquired | 76.2% (price as of 2026-10-02) |
| March 18, 2024 | IMRX | P | 4,976 | $3.05 | $15,177 | 61,766 Direct | +8.76% | Acquired | 33.4% (price as of 2026-10-02) |
| Jan. 1, 2024 | IMRX | A | 6,879 | · | · | 6,879 Direct | · | Acquired | (price as of 2026-10-02) |
| June 14, 2023 | IMRX | A | 17,500 | · | · | 17,500 Direct | · | Acquired | (price as of 2026-10-02) |
| June 21, 2022 | IMRX | A | 14,200 | · | · | 14,200 Direct | · | Acquired | (price as of 2026-10-02) |
| March 15, 2022 | IMRX | P | 6,667 | $6.75 | $45,002 | 11,766 Direct | +130.75% | Acquired | -39.7% (price as of 2026-10-02) |
| Sept. 20, 2021 | IMRX | P | 4,750 | $24.44 | $116,090 | 5,099 Direct | +1361.03% | Acquired | -83.3% (price as of 2026-10-02) |
| Sept. 13, 2021 | IMRX | P | 5,750 | $21.51 | $123,682 | 392,242 Indirect | +1.49% | Acquired | -81.1% (price as of 2026-10-02) |
| Sept. 13, 2021 | IMRX | P | 349 | $21.25 | $7,416 | 349 Direct | · | Acquired | -80.8% (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | C | 133,572 | · | · | 257,325 Indirect | +107.93% | Acquired | (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | C | 30,646 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | C | 30,646 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | C | 30,646 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | C | 51,462 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | C | 92,509 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | C | 102,926 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | P | 33,333 | $15.00 | $499,995 | 115,441 Indirect | +40.60% | Acquired | -72.9% (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | C | 82,108 | · | · | 82,108 Indirect | · | Acquired | (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | P | 129,167 | $15.00 | $1,937,505 | 476,568 Indirect | +37.18% | Acquired | -72.9% (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | C | 123,155 | · | · | 347,401 Indirect | +54.92% | Acquired | (price as of 2026-10-02) |
| Aug. 3, 2021 | IMRX | P | 129,167 | $15.00 | $1,937,505 | 386,492 Indirect | +50.20% | Acquired | -72.9% (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| June 11, 2026 | IMRX | Stock Option | Class A Common Stock | $4.12 | June 11, 2036 | 33,350 | Acquired |
| Jan. 1, 2026 | IMRX | Stock Option [F1] | Class A Common Stock | $6.58 | Jan. 1, 2036 | 7,888 | Acquired |
| June 13, 2025 | IMRX | Stock Option | Class A Common Stock | $1.90 | June 13, 2035 | 33,350 | Acquired |
| Jan. 1, 2025 | IMRX | Stock Option [F1] | Class A Common Stock | $2.20 | Jan. 1, 2035 | 23,485 | Acquired |
| June 12, 2024 | IMRX | Stock Option | Class A Common Stock | $1.54 | June 12, 2034 | 33,350 | Acquired |
| Jan. 1, 2024 | IMRX | Stock Option [F1] | Class A Common Stock | $7.35 | Jan. 1, 2034 | 6,879 | Acquired |
| June 14, 2023 | IMRX | Stock Option | Class A Common Stock | $9.32 | June 14, 2033 | 17,500 | Acquired |
| June 21, 2022 | IMRX | Stock Option | Class A Common Stock | $4.63 | June 20, 2032 | 14,200 | Acquired |
| Aug. 3, 2021 | IMRX | Series B Preferred Stock | Class A Common Stock | · | · | 30,646 | Disposed |
| Aug. 3, 2021 | IMRX | Series B Preferred Stock | Class A Common Stock | · | · | 30,646 | Disposed |
| Aug. 3, 2021 | IMRX | Series B Preferred Stock | Class A Common Stock | · | · | 30,646 | Disposed |
| Aug. 3, 2021 | IMRX | Series A Preferred Stock | Class A Common Stock | · | · | 51,462 | Disposed |
| Aug. 3, 2021 | IMRX | Series A Preferred Stock | Class A Common Stock | · | · | 92,509 | Disposed |
| Aug. 3, 2021 | IMRX | Series A Preferred Stock | Class A Common Stock | · | · | 102,926 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 18 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Sept. 13, 2021 | IMRX | Class A Common Stock | 123,753 | Indirect |
| Sept. 13, 2021 | IMRX | Class A Common Stock | 224,293 | Indirect |
| Sept. 13, 2021 | IMRX | Stock Option | 111,153 | Direct |
| Sept. 13, 2021 | IMRX | Series A Preferred Stock | 102,926 | Indirect |
| Sept. 13, 2021 | IMRX | Series A Preferred Stock | 92,509 | Indirect |
| Sept. 13, 2021 | IMRX | Series A Preferred Stock | 51,462 | Indirect |
| Sept. 13, 2021 | IMRX | Series B Preferred Stock | 30,646 | Indirect |
| Sept. 13, 2021 | IMRX | Series B Preferred Stock | 30,646 | Indirect |
| Sept. 13, 2021 | IMRX | Series B Preferred Stock | 30,646 | Indirect |
| July 29, 2021 | IMRX | Class A Common Stock | 123,753 | Indirect |
| July 29, 2021 | IMRX | Class A Common Stock | 224,246 | Indirect |
| July 29, 2021 | IMRX | Stock Option | 111,153 | Direct |
| July 29, 2021 | IMRX | Series A Preferred Stock | 102,926 | Indirect |
| July 29, 2021 | IMRX | Series A Preferred Stock | 92,509 | Indirect |
| July 29, 2021 | IMRX | Series A Preferred Stock | 51,462 | Indirect |
| July 29, 2021 | IMRX | Series B Preferred Stock | 30,646 | Indirect |
| July 29, 2021 | IMRX | Series B Preferred Stock | 30,646 | Indirect |
| July 29, 2021 | IMRX | Series B Preferred Stock | 30,646 | Indirect |