Patrick J. Heron
Insider
Activist
First SEC filing: May 21, 2026 · Latest: June 9, 2026
Insider at
Insider transactions
1 buys (P)
0 sells (S)
Net: $8,999,984
Avg return of open purchases vs now: 21.1%
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 15, 2026 | MIRM | A | 1,980 | · | · | 1,980 Direct | · | Acquired | (price as of 2026-10-02) |
| June 15, 2026 | MIRM | A | 3,772 | · | · | 3,772 Direct | · | Acquired | (price as of 2026-10-02) |
| June 5, 2026 | ARQT | A | 5,778 | · | · | 32,213 Direct | +21.86% | Acquired | (price as of 2026-10-02) |
| June 5, 2026 | ARQT | A | 16,667 | · | · | 16,667 Direct | · | Acquired | (price as of 2026-10-02) |
| June 4, 2026 | MBX | A | 12,500 | · | · | 12,500 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 23, 2026 | MIRM | J | 159,277 | · | · | 327,585 Indirect | +94.63% | Acquired | (price as of 2026-10-02) |
| Jan. 23, 2026 | MIRM | P | 131,425 | $68.48 | $8,999,984 | 459,010 Indirect | +40.12% | Acquired | 21.1% (price as of 2026-10-02) |
| June 13, 2025 | ARQT | P | 2,646 | $13.08 | $34,610 | 27,448 Indirect | +10.67% | Acquired | 92.4% (price as of 2026-10-02) |
| June 12, 2025 | ARQT | A | 7,609 | · | · | 26,435 Direct | +40.42% | Acquired | (price as of 2026-10-02) |
| June 12, 2025 | ARQT | A | 20,568 | · | · | 20,568 Direct | · | Acquired | (price as of 2026-10-02) |
| June 5, 2025 | MBX | A | 16,000 | · | · | 16,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 5, 2025 | ARQT | P | 378 | $13.41 | $5,069 | 24,802 Indirect | +1.55% | Acquired | 87.6% (price as of 2026-10-02) |
| June 4, 2025 | ARQT | P | 1,890 | $13.32 | $25,175 | 24,424 Indirect | +8.39% | Acquired | 88.9% (price as of 2026-10-02) |
| May 29, 2025 | MIRM | M | 5,703 | · | · | 5,703 Direct | · | Acquired | (price as of 2026-10-02) |
| May 29, 2025 | MIRM | M | 5,703 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 29, 2025 | MIRM | A | 6,268 | · | · | 6,268 Direct | · | Acquired | (price as of 2026-10-02) |
| May 29, 2025 | MIRM | A | 3,977 | · | · | 3,977 Direct | · | Acquired | (price as of 2026-10-02) |
| May 22, 2025 | ARQT | P | 2,520 | $13.65 | $34,398 | 22,534 Indirect | +12.59% | Acquired | 84.3% (price as of 2026-10-02) |
| May 21, 2025 | ARQT | P | 2,520 | $13.66 | $34,423 | 20,014 Indirect | +14.40% | Acquired | 84.2% (price as of 2026-10-02) |
| May 15, 2025 | ARQT | P | 2,520 | $13.62 | $34,322 | 17,494 Indirect | +16.83% | Acquired | 84.7% (price as of 2026-10-02) |
| May 14, 2025 | ARQT | P | 6,300 | $13.76 | $86,688 | 14,974 Indirect | +72.63% | Acquired | 82.8% (price as of 2026-10-02) |
| May 13, 2025 | ARQT | P | 2,374 | $13.76 | $32,666 | 8,674 Indirect | +37.68% | Acquired | 82.8% (price as of 2026-10-02) |
| May 9, 2025 | ARQT | P | 6,300 | $13.60 | $85,680 | 6,300 Indirect | · | Acquired | 85.0% (price as of 2026-10-02) |
| March 17, 2025 | MIRM | P | 21 | $43.93 | $923 | 168,672 Indirect | +0.01% | Acquired | 88.8% (price as of 2026-10-02) |
| March 14, 2025 | MIRM | P | 528 | $44.11 | $23,290 | 168,651 Indirect | +0.31% | Acquired | 88.0% (price as of 2026-10-02) |
| March 11, 2025 | MIRM | P | 963 | $43.77 | $42,151 | 168,123 Indirect | +0.58% | Acquired | 89.5% (price as of 2026-10-02) |
| March 10, 2025 | MIRM | P | 758 | $42.66 | $32,336 | 166,583 Indirect | +0.46% | Acquired | 94.4% (price as of 2026-10-02) |
| March 10, 2025 | MIRM | P | 577 | $43.37 | $25,024 | 167,160 Indirect | +0.35% | Acquired | 91.2% (price as of 2026-10-02) |
| March 7, 2025 | MIRM | P | 580 | $43.21 | $25,062 | 165,825 Indirect | +0.35% | Acquired | 91.9% (price as of 2026-10-02) |
| March 6, 2025 | MIRM | P | 1,335 | $43.89 | $58,593 | 165,245 Indirect | +0.81% | Acquired | 88.9% (price as of 2026-10-02) |
| March 5, 2025 | MIRM | P | 267 | $44.54 | $11,892 | 163,910 Indirect | +0.16% | Acquired | 86.2% (price as of 2026-10-02) |
| March 4, 2025 | MIRM | P | 1,279 | $45.55 | $58,258 | 163,587 Indirect | +0.79% | Acquired | 82.1% (price as of 2026-10-02) |
| March 4, 2025 | MIRM | P | 56 | $45.96 | $2,574 | 163,643 Indirect | +0.03% | Acquired | 80.4% (price as of 2026-10-02) |
| Sept. 18, 2024 | MIRM | P | 115 | $37.40 | $4,301 | 162,308 Indirect | +0.07% | Acquired | 121.7% (price as of 2026-10-02) |
| Sept. 16, 2024 | MBX | C | 28,297,265 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 16, 2024 | MBX | C | 18,922,852 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 16, 2024 | MBX | P | 625,000 | $16.00 | $10,000,000 | 4,552,774 Indirect | +15.91% | Acquired | 265.7% (price as of 2026-10-02) |
| Sept. 16, 2024 | MBX | C | 3,927,774 | · | · | 3,927,774 Indirect | · | Acquired | (price as of 2026-10-02) |
| Sept. 12, 2024 | MBX | A | 15,963 | · | · | 15,963 Direct | · | Acquired | (price as of 2026-10-02) |
| Sept. 6, 2024 | MIRM | P | 230 | $41.58 | $9,563 | 162,193 Indirect | +0.14% | Acquired | 99.4% (price as of 2026-10-02) |
| June 14, 2024 | ARQT | A | 10,139 | · | · | 18,826 Direct | +116.71% | Acquired | (price as of 2026-10-02) |
| June 14, 2024 | ARQT | A | 27,052 | · | · | 27,052 Direct | · | Acquired | (price as of 2026-10-02) |
| June 5, 2024 | MIRM | A 10b5-1 | 8,779 | · | · | 8,779 Direct | · | Acquired | (price as of 2026-10-02) |
| June 5, 2024 | MIRM | A 10b5-1 | 5,703 | · | · | 5,703 Direct | · | Acquired | (price as of 2026-10-02) |
| March 4, 2024 | ARQT | P | 21,052 | $9.50 | $199,994 | 8,785,284 Indirect | +0.24% | Acquired | 164.8% (price as of 2026-10-02) |
| Nov. 9, 2023 | MIRM | P | 2,910 | $28.30 | $82,353 | 161,963 Indirect | +1.83% | Acquired | 193.0% (price as of 2026-10-02) |
| Sept. 13, 2023 | MIRM | P | 2,625 | $31.02 | $81,428 | 159,053 Indirect | +1.68% | Acquired | 167.3% (price as of 2026-10-02) |
| Sept. 12, 2023 | MIRM | P | 3,750 | $30.60 | $114,750 | 156,428 Indirect | +2.46% | Acquired | 171.0% (price as of 2026-10-02) |
| Sept. 11, 2023 | MIRM | P | 4,687 | $30.30 | $142,016 | 152,678 Indirect | +3.17% | Acquired | 173.7% (price as of 2026-10-02) |
| Aug. 31, 2023 | MIRM | P | 147,991 | $26.25 | $3,884,764 | 147,991 Indirect | · | Acquired | 215.9% (price as of 2026-10-02) |
| June 12, 2023 | MIRM | A | 17,000 | · | · | 17,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 31, 2023 | ARQT | A | 4,375 | · | · | 8,687 Direct | +101.46% | Acquired | (price as of 2026-10-02) |
| May 31, 2023 | ARQT | A | 12,220 | · | · | 12,220 Direct | · | Acquired | (price as of 2026-10-02) |
| June 2, 2022 | MIRM | A | 17,000 | · | · | 17,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 1, 2022 | ARQT | A | 4,312 | · | · | 4,312 Direct | · | Acquired | (price as of 2026-10-02) |
| June 1, 2022 | ARQT | A | 11,796 | · | · | 11,796 Direct | · | Acquired | (price as of 2026-10-02) |
| June 9, 2021 | ARQT | A | 13,391 | · | · | 13,391 Direct | · | Acquired | (price as of 2026-10-02) |
| June 4, 2021 | MIRM | A | 17,000 | · | · | 17,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 2, 2021 | PCVX | A | 15,000 | · | · | 15,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| June 16, 2020 | PCVX | C | 140,824 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 16, 2020 | PCVX | C | 226,236 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 16, 2020 | PCVX | C | 1,692,494 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 16, 2020 | PCVX | P | 250,000 | $16.00 | $4,000,000 | 2,309,554 Indirect | +12.14% | Acquired | 253.0% (price as of 2026-10-02) |
| June 16, 2020 | PCVX | C | 140,824 | · | · | 2,059,554 Indirect | +7.34% | Acquired | (price as of 2026-10-02) |
| June 16, 2020 | PCVX | C | 226,236 | · | · | 1,918,730 Indirect | +13.37% | Acquired | (price as of 2026-10-02) |
| June 16, 2020 | PCVX | C | 1,692,494 | · | · | 1,692,494 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 11, 2020 | PCVX | A | 40,000 | · | · | 40,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 11, 2020 | MIRM | A | 17,000 | · | · | 17,000 Direct | · | Acquired | (price as of 2026-10-02) |
| March 3, 2020 | PASG | C | 432,802 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| March 3, 2020 | PASG | C | 1,049,175 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| March 3, 2020 | PASG | C | 2,977,242 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| March 3, 2020 | PASG | P | 550,000 | $18.00 | $9,900,000 | 5,009,219 Indirect | +12.33% | Acquired | -98.9% (price as of 2026-10-02) |
| March 3, 2020 | PASG | C | 432,802 | · | · | 4,459,219 Indirect | +10.75% | Acquired | (price as of 2026-10-02) |
| March 3, 2020 | PASG | C | 1,049,175 | · | · | 4,026,417 Indirect | +35.24% | Acquired | (price as of 2026-10-02) |
| March 3, 2020 | PASG | C | 2,977,242 | · | · | 2,977,242 Indirect | · | Acquired | (price as of 2026-10-02) |
| Feb. 27, 2020 | ARQT | A | 24,000 | · | · | 24,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 27, 2020 | PASG | A | 33,836 | · | · | 33,836 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 4, 2020 | ARQT | C | 1,074,467 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 4, 2020 | ARQT | C | 2,099,019 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 4, 2020 | ARQT | C | 6,360,272 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 4, 2020 | ARQT | P | 500,000 | $17.00 | $8,500,000 | 10,542,790 Indirect | +4.98% | Acquired | 48.0% (price as of 2026-10-02) |
| Feb. 4, 2020 | ARQT | C | 1,074,467 | · | · | 10,042,790 Indirect | +11.98% | Acquired | (price as of 2026-10-02) |
| Feb. 4, 2020 | ARQT | C | 2,099,019 | · | · | 8,968,323 Indirect | +30.56% | Acquired | (price as of 2026-10-02) |
| Feb. 4, 2020 | ARQT | C | 6,360,272 | · | · | 6,869,304 Indirect | +1249.48% | Acquired | (price as of 2026-10-02) |
| July 22, 2019 | MIRM | C | 24,935,300 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| July 22, 2019 | MIRM | P | 450,000 | $15.00 | $6,750,000 | 3,566,912 Indirect | +14.44% | Acquired | 452.9% (price as of 2026-10-02) |
| July 22, 2019 | MIRM | C | 3,116,912 | · | · | 3,116,912 Indirect | · | Acquired | (price as of 2026-10-02) |
| Sept. 10, 2015 | COLL | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 12, 2015 | COLL | C | 1,533,399 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| May 12, 2015 | COLL | C | 2,705,585 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| May 12, 2015 | COLL | C | 3,676,078 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| May 12, 2015 | COLL | C | 4,019,183 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| May 12, 2015 | COLL | P | 150,000 | $12.00 | $1,800,000 | 1,887,332 Indirect | +8.63% | Acquired | 83.5% (price as of 2026-10-02) |
| May 12, 2015 | COLL | C | 540,498 | · | · | 1,737,332 Indirect | +45.16% | Acquired | (price as of 2026-10-02) |
| May 12, 2015 | COLL | C | 392,113 | · | · | 1,196,834 Indirect | +48.73% | Acquired | (price as of 2026-10-02) |
| May 12, 2015 | COLL | C | 222,231 | · | · | 804,721 Indirect | +38.15% | Acquired | (price as of 2026-10-02) |
| May 12, 2015 | COLL | C | 582,490 | · | · | 582,490 Indirect | · | Acquired | (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 15, 2026 | MIRM | Deferred Stock Units | Common Stock | · | · | 1,980 | Acquired |
| June 15, 2026 | MIRM | Stock Option (right to buy) | Common Stock | $101.00 | June 14, 2036 | 3,772 | Acquired |
| June 5, 2026 | ARQT | Stock Option (right to buy) | Common Stock | $21.23 | June 5, 2036 | 16,667 | Acquired |
| June 4, 2026 | MBX | Stock option (right to buy) | Common Stock | $30.91 | June 4, 2036 | 12,500 | Acquired |
| June 12, 2025 | ARQT | Stock Option (right to buy) | Common Stock | $13.50 | June 12, 2035 | 20,568 | Acquired |
| June 5, 2025 | MBX | Stock option (right to buy) | Common Stock | $11.86 | June 5, 2035 | 16,000 | Acquired |
| May 29, 2025 | MIRM | Restricted Stock Units | Common Stock | · | · | 5,703 | Disposed |
| May 29, 2025 | MIRM | Stock Option (right to buy) | Common Stock | $44.00 | May 28, 2035 | 6,268 | Acquired |
| May 29, 2025 | MIRM | Deferred Stock Units | Common Stock | · | · | 3,977 | Acquired |
| Sept. 16, 2024 | MBX | Series B Convertible Preferred Stock | Common Stock | · | · | 28,297,265 | Disposed |
| Sept. 16, 2024 | MBX | Series A Convertible Preferred Stock | Common Stock | · | · | 18,922,852 | Disposed |
| Sept. 12, 2024 | MBX | Stock Option (Right to Buy) | Common Stock | $16.00 | Sept. 11, 2034 | 15,963 | Acquired |
| June 14, 2024 | ARQT | Stock Option (right to buy) | Common Stock | $8.63 | June 14, 2034 | 27,052 | Acquired |
| June 5, 2024 | MIRM | Stock Option (right to buy) | Common Stock | $26.30 | June 4, 2034 | 8,779 | Acquired |
| June 5, 2024 | MIRM | Restricted Stock Units | Common Stock | · | · | 5,703 | Acquired |
| June 12, 2023 | MIRM | Stock Option (right to buy) | Common Stock | $28.97 | June 11, 2033 | 17,000 | Acquired |
| May 31, 2023 | ARQT | Stock Option (right to buy) | Common Stock | $7.51 | May 31, 2033 | 12,220 | Acquired |
| June 2, 2022 | MIRM | Stock Option (right to buy) | Common Stock | $23.51 | June 1, 2032 | 17,000 | Acquired |
| June 1, 2022 | ARQT | Stock Option (Right to Buy) | Common Stock | $20.29 | June 1, 2032 | 11,796 | Acquired |
| June 9, 2021 | ARQT | Stock Option (Right to Buy) | Common Stock | $27.77 | June 9, 2031 | 13,391 | Acquired |
| June 4, 2021 | MIRM | Stock Option (right to buy) | Common Stock | $16.88 | June 3, 2031 | 17,000 | Acquired |
| June 2, 2021 | PCVX | Stock Option (right to buy) | Common Stock | $21.49 | June 1, 2031 | 15,000 | Disposed |
| June 16, 2020 | PCVX | Series D Preferred Stock [F4] | Common Stock | · | · | 140,824 | Disposed |
| June 16, 2020 | PCVX | Series C Preferred Stock [F3] | Common Stock | · | · | 226,236 | Disposed |
| June 16, 2020 | PCVX | Series B Preferred Stock [F1] | Common Stock | · | · | 1,692,494 | Disposed |
| June 11, 2020 | PCVX | Stock Option (right to buy) | Common Stock | $16.00 | June 10, 2030 | 40,000 | Acquired |
| June 11, 2020 | MIRM | Stock Option (right to buy) | Common Stock | $16.71 | June 10, 2030 | 17,000 | Acquired |
| March 3, 2020 | PASG | Series B Preferred Stock | Common Stock | · | · | 432,802 | Disposed |
| March 3, 2020 | PASG | Series A-2 Preferred Stock | Common Stock | · | · | 1,049,175 | Disposed |
| March 3, 2020 | PASG | Series A-1 Preferred Stock | Common Stock | · | · | 2,977,242 | Disposed |
| Feb. 27, 2020 | ARQT | Stock Option (Right to Buy) | Common Stock | $27.61 | Feb. 27, 2030 | 24,000 | Acquired |
| Feb. 27, 2020 | PASG | Director Stock Option (Right to Buy) | Common Stock | $18.00 | Feb. 27, 2030 | 33,836 | Acquired |
| Feb. 4, 2020 | ARQT | Series C Preferred Stock | Common Stock | · | · | 1,074,467 | Disposed |
| Feb. 4, 2020 | ARQT | Series B Preferred Stock | Common Stock | · | · | 2,099,019 | Disposed |
| Feb. 4, 2020 | ARQT | Series A Preferred Stock | Common Stock | · | · | 6,360,272 | Disposed |
| July 22, 2019 | MIRM | Series A Preferred Stock | Common Stock | · | · | 24,935,300 | Disposed |
| Sept. 10, 2015 | COLL | Stock Option (Right to Purchase) | Common Stock | $13.45 | Sept. 10, 2025 | 15,000 | Acquired |
| May 12, 2015 | COLL | Series B Convertible Stock | Common Stock | · | · | 1,533,399 | Disposed |
| May 12, 2015 | COLL | Series C Convertible Stock | Common Stock | · | · | 2,705,585 | Disposed |
| May 12, 2015 | COLL | Series D Convertible Stock | Common Stock | · | · | 3,676,078 | Disposed |
| May 12, 2015 | COLL | Series A Convertible Stock | Common Stock | · | · | 4,019,183 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 17 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Sept. 12, 2024 | MBX | Series A Convertible Preferred Stock | 1,574,005 | Indirect |
| Sept. 12, 2024 | MBX | Series B Convertible Preferred Stock | 2,353,769 | Indirect |
| June 11, 2020 | PCVX | Series B Preferred Stock | 1,692,494 | Indirect |
| June 11, 2020 | PCVX | Series C Preferred Stock | 226,236 | Indirect |
| June 11, 2020 | PCVX | Series D Preferred Stock | 140,824 | Indirect |
| Feb. 27, 2020 | PASG | Series A-1 Preferred Stock | 2,977,242 | Indirect |
| Feb. 27, 2020 | PASG | Series A-2 Preferred Stock | 1,049,175 | Indirect |
| Feb. 27, 2020 | PASG | Series B Preferred Stock | 432,802 | Indirect |
| Jan. 30, 2020 | ARQT | Common Stock | 509,032 | Indirect |
| Jan. 30, 2020 | ARQT | Series A Preferred Stock | 6,360,272 | Indirect |
| Jan. 30, 2020 | ARQT | Series B Preferred Stock | 2,099,019 | Indirect |
| Jan. 30, 2020 | ARQT | Series C Preferred Stock | 1,074,467 | Indirect |
| July 17, 2019 | MIRM | Series A Preferred Stock | · | Indirect |
| May 6, 2015 | COLL | Series A Convertible Preferred Stock | · | Indirect |
| May 6, 2015 | COLL | Series B Convertible Preferred Stock | · | Indirect |
| May 6, 2015 | COLL | Series C Convertible Preferred Stock | · | Indirect |
| May 6, 2015 | COLL | Series D Convertible Preferred Stock | · | Indirect |