Heron Patrick J

Director · Ten-percent owner · MIRM, ARQT, MBX, HLVX

As of 2026-09-16, Heron Patrick J has 38 Form 4 transactions on record across 4 companies — 9 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $1.4MIndirect: $354.0M$355.4Mas of 2026-09-16
  • Direct $1.4M
  • Indirect $354.0M
MBXindirect5,219,440 sh$321.4M
MIRMindirect327,585 sh$31.9M
MBXdirect12,500 sh$770K
ARQTindirect27,448 sh$717K
ARQTdirect16,667 sh$436K
MIRMdirect1,980 sh$193K
HLVXdirect17,199 sh$36K

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

MIRM · 20 trades
2026-06-15: Award / grant, 1,980 sh ($0)2026-06-15: Award / grant, 3,772 sh ($0)2026-01-23: Purchase, 131,425 sh ($9.0M)2026-01-23: Other acquisition, 159,277 sh2026-01-23: Other acquisition, 159,277 sh2025-05-29: Award / grant, 6,268 sh ($0)2025-05-29: Option exercise, 5,703 sh ($0)2025-05-29: Award / grant, 3,977 sh ($0)2025-05-29: Option exercise, 5,703 sh2025-05-29: Option exercise, 5,703 sh2025-03-17: Purchase, 21 sh ($923)2025-03-14: Purchase, 528 sh ($23K)2025-03-11: Purchase, 963 sh ($42K)2025-03-10: Purchase, 758 sh ($32K)2025-03-10: Purchase, 577 sh ($25K)2025-03-07: Purchase, 580 sh ($25K)2025-03-06: Purchase, 1,335 sh ($59K)2025-03-05: Purchase, 267 sh ($12K)2025-03-04: Purchase, 1,279 sh ($58K)2025-03-04: Purchase, 56 sh ($3K)
ARQT · 13 trades
2026-06-05: Award / grant, 16,667 sh ($0)2026-06-05: Award / grant, 5,778 sh ($0)2025-06-13: Purchase, 2,646 sh ($35K)2025-06-12: Award / grant, 20,568 sh ($0)2025-06-12: Award / grant, 7,609 sh ($0)2025-06-05: Purchase, 378 sh ($5K)2025-06-04: Purchase, 1,890 sh ($25K)2025-05-22: Purchase, 2,520 sh ($34K)2025-05-21: Purchase, 2,520 sh ($34K)2025-05-15: Purchase, 2,520 sh ($34K)2025-05-14: Purchase, 6,300 sh ($87K)2025-05-13: Purchase, 2,374 sh ($33K)2025-05-09: Purchase, 6,300 sh ($86K)
MBX · 3 trades
2026-06-04: Award / grant, 12,500 sh ($0)2025-09-26: Purchase, 666,666 sh ($12.0M)2025-06-05: Award / grant, 16,000 sh ($0)
HLVX · 2 trades
2025-06-23: Award / grant, 17,199 sh ($0)2024-06-06: Award / grant, 22,500 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-01-23MIRMPurchase131,425 @ $68.48$9.0M+40.1% of holding459,010Form 4
2025-09-26MBXPurchase666,666 @ $18.00$12.0M+14.6% of holding5,219,440Form 4
2025-06-13ARQTPurchase2,646 @ $13.08$35K+10.7% of holding27,448Form 4
2025-06-05ARQTPurchase378 @ $13.41$5K+1.5% of holding24,802Form 4
2025-06-04ARQTPurchase1,890 @ $13.32$25K+8.4% of holding24,424Form 4
2025-05-22ARQTPurchase2,520 @ $13.65$34K+12.6% of holding22,534Form 4
2025-05-21ARQTPurchase2,520 @ $13.66$34K+14.4% of holding20,014Form 4
2025-05-15ARQTPurchase2,520 @ $13.62$34K+16.8% of holding17,494Form 4
2025-05-14ARQTPurchase6,300 @ $13.76$87K+72.6% of holding14,974Form 4
2025-05-13ARQTPurchase2,374 @ $13.76$33K+37.7% of holding8,674Form 4
2025-05-09ARQTPurchase6,300 @ $13.60$86Kownership Δ n/a6,300Form 4
2025-03-17MIRMPurchase21 @ $43.93$923+0.0% of holding168,672Form 4
2025-03-14MIRMPurchase528 @ $44.11$23K+0.3% of holding168,651Form 4
2025-03-11MIRMPurchase963 @ $43.77$42K+0.6% of holding168,123Form 4
2025-03-10MIRMPurchase758 @ $42.66$32K+0.5% of holding166,583Form 4
2025-03-10MIRMPurchase577 @ $43.37$25K+0.3% of holding167,160Form 4
2025-03-07MIRMPurchase580 @ $43.21$25K+0.4% of holding165,825Form 4
2025-03-06MIRMPurchase1,335 @ $43.89$59K+0.8% of holding165,245Form 4
2025-03-05MIRMPurchase267 @ $44.55$12K+0.2% of holding163,910Form 4
2025-03-04MIRMPurchase1,279 @ $45.55$58K+0.8% of holding163,587Form 4
2025-03-04MIRMPurchase56 @ $45.96$3K+0.0% of holding163,643Form 4
17 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-06-15MIRMAward / grant1,9801,980Form 4
2026-06-15MIRMAward / grant3,7723,772Form 4
2026-06-05ARQTAward / grant16,66716,667Form 4
2026-06-05ARQTAward / grant5,77832,213Form 4
2026-06-04MBXAward / grant12,50012,500Form 4
2026-01-23MIRMOther acquisition159,277327,585Form 4
2026-01-23MIRMOther acquisition159,277327,585Form 4
2025-06-23HLVXAward / grant17,19917,199Form 4
2025-06-12ARQTAward / grant20,56820,568Form 4
2025-06-12ARQTAward / grant7,60926,435Form 4
2025-06-05MBXAward / grant16,00016,000Form 4
2025-05-29MIRMAward / grant6,2686,268Form 4
2025-05-29MIRMOption exercise5,7030Form 4
2025-05-29MIRMAward / grant3,9773,977Form 4
2025-05-29MIRMOption exercise5,7035,703Form 4
2025-05-29MIRMOption exercise5,7035,703Form 4
2024-06-06HLVXAward / grant22,50022,500Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.