Patrick J. Heron

CIK 1365617 · View on SEC EDGAR ↗

Insider Activist

First SEC filing: May 21, 2026 · Latest: June 9, 2026

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Insider at

Insider transactions

1 buys (P) 0 sells (S) Net: $8,999,984 + 46 non-open-market transactions below Avg return of open purchases vs now: 49.7% last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

46 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Jan. 23, 2026 MIRM P 131,425 $68.48 $8,999,984 459,010 Indirect +40.12% Acquired 49.7% (price as of 2026-08-19)
Sept. 16, 2024 MBX P 625,000 $16.00 $10,000,000 4,552,774 Indirect +15.91% Acquired 317.0% (price as of 2026-08-19)
Nov. 9, 2023 MIRM P 2,910 $28.30 $82,353 161,963 Indirect +1.83% Acquired 262.3% (price as of 2026-08-19)
Sept. 13, 2023 MIRM P 2,625 $31.02 $81,428 159,053 Indirect +1.68% Acquired 230.5% (price as of 2026-08-19)
Sept. 12, 2023 MIRM P 3,750 $30.60 $114,750 156,428 Indirect +2.46% Acquired 235.0% (price as of 2026-08-19)
Sept. 11, 2023 MIRM P 4,687 $30.30 $142,016 152,678 Indirect +3.17% Acquired 238.3% (price as of 2026-08-19)
Aug. 31, 2023 MIRM P 147,991 $26.25 $3,884,764 147,991 Indirect — Acquired 290.6% (price as of 2026-08-19)
June 16, 2020 PCVX P 250,000 $16.00 $4,000,000 2,309,554 Indirect +12.14% Acquired 288.9% (price as of 2026-08-19)
March 3, 2020 PASG P 550,000 $18.00 $9,900,000 5,009,219 Indirect +12.33% Acquired -98.7% (price as of 2026-08-19)
Feb. 4, 2020 ARQT P 500,000 $17.00 $8,500,000 10,542,790 Indirect +4.98% Acquired 59.0% (price as of 2026-08-19)
July 22, 2019 MIRM P 450,000 $15.00 $6,750,000 3,566,912 Indirect +14.44% Acquired 583.5% (price as of 2026-08-19)
May 12, 2015 COLL P 150,000 $12.00 $1,800,000 1,887,332 Indirect +8.63% Acquired 144.6% (price as of 2026-08-19)

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) — — 1,980 Acquired
June 15, 2026 MIRM Stock Option (right to buy) Common Stock (3,772) $101.00 June 14, 2036 3,772 Acquired
June 4, 2026 MBX Stock option (right to buy) Common Stock (12,500) $30.91 June 4, 2036 12,500 Acquired
June 5, 2025 MBX Stock option (right to buy) Common Stock (16,000) $11.86 June 5, 2035 16,000 Acquired
Sept. 16, 2024 MBX Series B Convertible Preferred Stock Common Stock (2,353,769) — — 28,297,265 Disposed
Sept. 16, 2024 MBX Series A Convertible Preferred Stock Common Stock (1,574,005) — — 18,922,852 Disposed
Sept. 12, 2024 MBX Stock Option (Right to Buy) Common Stock (15,963) $16.00 Sept. 11, 2034 15,963 Acquired
June 12, 2023 MIRM Stock Option (right to buy) Common Stock (17,000) $28.97 June 11, 2033 17,000 Acquired
June 2, 2022 MIRM Stock Option (right to buy) Common Stock (17,000) $23.51 June 1, 2032 17,000 Acquired
June 4, 2021 MIRM Stock Option (right to buy) Common Stock (17,000) $16.88 June 3, 2031 17,000 Acquired
June 2, 2021 PCVX Stock Option (right to buy) Common Stock (15,000) $21.49 June 1, 2031 15,000 Disposed
June 16, 2020 PCVX Series D Preferred Stock [F4] Common Stock (140,824) — — 140,824 Disposed
June 16, 2020 PCVX Series C Preferred Stock [F3] Common Stock (226,236) — — 226,236 Disposed
June 16, 2020 PCVX Series B Preferred Stock [F1] Common Stock (1,692,494) — — 1,692,494 Disposed
June 11, 2020 PCVX Stock Option (right to buy) Common Stock (40,000) $16.00 June 10, 2030 40,000 Acquired
June 11, 2020 MIRM Stock Option (right to buy) Common Stock (17,000) $16.71 June 10, 2030 17,000 Acquired
March 3, 2020 PASG Series B Preferred Stock Common Stock (432,802) — — 432,802 Disposed
March 3, 2020 PASG Series A-2 Preferred Stock Common Stock (1,049,175) — — 1,049,175 Disposed
March 3, 2020 PASG Series A-1 Preferred Stock Common Stock (2,977,242) — — 2,977,242 Disposed
Feb. 27, 2020 PASG Director Stock Option (Right to Buy) Common Stock (33,836) $18.00 Feb. 27, 2030 33,836 Acquired
Feb. 4, 2020 ARQT Series C Preferred Stock Common Stock (1,074,467) — — 1,074,467 Disposed
Feb. 4, 2020 ARQT Series B Preferred Stock Common Stock (2,099,019) — — 2,099,019 Disposed
Feb. 4, 2020 ARQT Series A Preferred Stock Common Stock (6,360,272) — — 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 (15,000) $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→ Common Stock (1,574,005) 1,574,005 Indirect
Sept. 12, 2024 MBX Series B Convertible Preferred Stock→ Common Stock (2,353,769) 2,353,769 Indirect
June 11, 2020 PCVX Series B Preferred Stock→ Common Stock (1,692,494) 1,692,494 Indirect
June 11, 2020 PCVX Series C Preferred Stock→ Common Stock (226,236) 226,236 Indirect
June 11, 2020 PCVX Series D Preferred Stock→ Common Stock (140,824) 140,824 Indirect
Feb. 27, 2020 PASG Series A-1 Preferred Stock→ Common Stock (2,977,242) 2,977,242 Indirect
Feb. 27, 2020 PASG Series A-2 Preferred Stock→ Common Stock (1,049,175) 1,049,175 Indirect
Feb. 27, 2020 PASG Series B Preferred Stock→ Common Stock (432,802) 432,802 Indirect
Jan. 30, 2020 ARQT Common Stock 509,032 Indirect
Jan. 30, 2020 ARQT Series A Preferred Stock→ Common Stock (6,360,272) 6,360,272 Indirect
Jan. 30, 2020 ARQT Series B Preferred Stock→ Common Stock (2,099,019) 2,099,019 Indirect
Jan. 30, 2020 ARQT Series C Preferred Stock→ Common Stock (1,074,467) 1,074,467 Indirect
July 17, 2019 MIRM Series A Preferred Stock→ Common Stock — Indirect
May 6, 2015 COLL Series A Convertible Preferred Stock→ Common Stock — Indirect
May 6, 2015 COLL Series B Convertible Preferred Stock→ Common Stock — Indirect
May 6, 2015 COLL Series C Convertible Preferred Stock→ Common Stock — Indirect
May 6, 2015 COLL Series D Convertible Preferred Stock→ Common Stock — Indirect