Heron Patrick J made significant open market purchases of biotech stocks over the last 365 days, with no sales recorded. He bought Arcutis Biotherapeutics ($ARQT) shares nine times for about $373 thousand, most recently on June 13, 2025, ranking 1,037th among insiders. For MBX Biosciences ($MBX), he invested nearly $12 million in one purchase on September 26, 2025, placing 96th in our database of nearly 5,000 individual insiders. He also acquired Mirum Pharmaceuticals ($MIRM) shares three times for about $9 million, latest on January 23, 2026, ranking 123rd. These buys exceed the average insider purchase of $1.5 million across 3.3 transactions.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 23, 2026 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | J | Common Stock | 159277 | $0.00 | 3,900,200.0000 | 56,993,841 | 4.26% | 0.28% |
| Jan. 23, 2026 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 131425 | $68.48 | 4,031,625.0000 | 56,993,841 | 3.37% | 0.23% |
| Sept. 26, 2025 | MBX Biosciences, Inc. | $MBX | Heron Patrick J | Not found | P | Common Stock | 666666 | $18.00 | 5,219,440.0000 | 33,424,371 | 14.64% | 1.99% |
| June 23, 2025 | HilleVax, Inc. | $HLVX | Heron Patrick J | Not found | A | Common Stock | 17199 | $0.00 | 8,552,536.0000 | 50,141,064 | 0.20% | 0.03% |
| June 13, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Not found | P | Common Stock | 2646 | $13.08 | 8,862,862.0000 | 120,957,633 | 0.03% | 0.00% |
| June 12, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Director | A | Common Stock | 7609 | $0.00 | 8,860,216.0000 | 120,957,633 | 0.09% | 0.01% |
| June 12, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Director | A | Stock Option (right to buy) | 20568 | $0.00 | 20,568.0000 | 120,957,633 | 9999.99% | 0.02% |
| June 5, 2025 | MBX Biosciences, Inc. | $MBX | Heron Patrick J | Not found | A | Stock option (right to buy) | 16000 | $0.00 | 16,000.0000 | 33,424,371 | 9999.99% | 0.05% |
| June 4, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Not found | P | Common Stock | 1890 | $13.32 | 8,852,229.0000 | 120,957,633 | 0.02% | 0.00% |
| June 5, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Not found | P | Common Stock | 378 | $13.41 | 8,852,607.0000 | 120,957,633 | 0.00% | 0.00% |
| May 29, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | A | Deferred Stock Units | 3977 | $0.00 | 3,977.0000 | 47,522,594 | 9999.99% | 0.01% |
| May 29, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | M | Restricted Stock Units | 5703 | $0.00 | 0.0000 | 47,522,594 | 100.00% | 0.01% |
| May 29, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | A | Stock Option (right to buy) | 6268 | $0.00 | 6,268.0000 | 47,522,594 | 9999.99% | 0.01% |
| May 29, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | M | Common Stock | 5703 | $0.00 | 3,741,287.0000 | 47,522,594 | 0.15% | 0.01% |
| May 21, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Not found | P | Common Stock | 2520 | $13.66 | 8,847,819.0000 | 120,957,633 | 0.03% | 0.00% |
| May 22, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Not found | P | Common Stock | 2520 | $13.65 | 8,850,339.0000 | 120,957,633 | 0.03% | 0.00% |
| May 15, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Not found | P | Common Stock | 2520 | $13.62 | 8,845,299.0000 | 120,957,633 | 0.03% | 0.00% |
| May 13, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Not found | P | Common Stock | 2374 | $13.76 | 8,836,479.0000 | 120,957,633 | 0.03% | 0.00% |
| May 14, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Not found | P | Common Stock | 6300 | $13.76 | 8,842,779.0000 | 120,957,633 | 0.07% | 0.01% |
| May 9, 2025 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Not found | P | Common Stock | 6300 | $13.60 | 8,834,105.0000 | 120,957,633 | 0.07% | 0.01% |
| June 6, 2024 | HilleVax, Inc. | $HLVX | Heron Patrick J | Not found | A | Stock Option | 22500 | $0.00 | 22,500.0000 | 0 | 9999.99% | 0.00% |
| March 14, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 528 | $44.11 | 3,735,563.0000 | 47,522,594 | 0.01% | 0.00% |
| March 17, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 21 | $43.93 | 3,735,584.0000 | 47,522,594 | 0.00% | 0.00% |
| March 11, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 963 | $43.77 | 3,735,035.0000 | 47,522,594 | 0.03% | 0.00% |
| March 10, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 577 | $43.37 | 3,734,072.0000 | 47,522,594 | 0.02% | 0.00% |
| March 10, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 758 | $42.66 | 3,733,495.0000 | 47,522,594 | 0.02% | 0.00% |
| March 6, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 1335 | $43.89 | 3,732,157.0000 | 47,522,594 | 0.04% | 0.00% |
| March 7, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 580 | $43.21 | 3,732,737.0000 | 47,522,594 | 0.02% | 0.00% |
| March 4, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 56 | $45.96 | 3,730,555.0000 | 47,522,594 | 0.00% | 0.00% |
| March 5, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 267 | $44.55 | 3,730,822.0000 | 47,522,594 | 0.01% | 0.00% |
| March 4, 2025 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 1279 | $45.55 | 3,730,499.0000 | 47,522,594 | 0.03% | 0.00% |
| Sept. 18, 2024 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 115 | $37.40 | 3,729,220.0000 | 40,885,124 | 0.00% | 0.00% |
| Sept. 16, 2024 | MBX Biosciences, Inc. | $MBX | Heron Patrick J | Not found | C | Common Stock | 3927774 | $0.00 | 3,927,774.0000 | 0 | 9999.99% | 0.00% |
| Sept. 16, 2024 | MBX Biosciences, Inc. | $MBX | Heron Patrick J | Not found | C | Series B Convertible Preferred Stock | 28297265 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Sept. 16, 2024 | MBX Biosciences, Inc. | $MBX | Heron Patrick J | Not found | C | Series A Convertible Preferred Stock | 18922852 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Sept. 16, 2024 | MBX Biosciences, Inc. | $MBX | Heron Patrick J | Not found | P | Common Stock | 625000 | $16.00 | 4,552,774.0000 | 0 | 15.91% | 0.00% |
| Sept. 12, 2024 | MBX Biosciences, Inc. | $MBX | Heron Patrick J | Not found | A | Stock Option (Right to Buy) | 15963 | $0.00 | 15,963.0000 | 0 | 9999.99% | 0.00% |
| Sept. 6, 2024 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | P | Common Stock | 230 | $41.58 | 3,729,105.0000 | 40,885,124 | 0.01% | 0.00% |
| June 14, 2024 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Director | A | Common Stock | 10139 | $0.00 | 18,826.0000 | 69,305,487 | 116.71% | 0.01% |
| June 14, 2024 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Director | A | Stock Option (right to buy) | 27052 | $0.00 | 27,052.0000 | 69,305,487 | 9999.99% | 0.04% |
| June 5, 2024 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | A | Restricted Stock Units | 5703 | $0.00 | 5,703.0000 | 40,885,124 | 9999.99% | 0.01% |
| June 5, 2024 | Mirum Pharmaceuticals, Inc. | $MIRM | Heron Patrick J | Not found | A | Stock Option (right to buy) | 8779 | $0.00 | 8,779.0000 | 40,885,124 | 9999.99% | 0.02% |
| March 4, 2024 | Arcutis Biotherapeutics, Inc. | $ARQT | Heron Patrick J | Not found | P | Common Stock | 21052 | $9.50 | 8,817,666.0000 | 69,305,487 | 0.24% | 0.03% |