Biggest Insider Buys: August 2026
The largest open-market insider purchases disclosed in SEC Form 4 filings, ranked by dollar value.
In August 2026, 19 open-market insider purchases of $50K or more were disclosed across 18 companies in SEC Form 4 filings, totaling $7.2M. The largest single purchase was $1.3M by ADAR1 Capital Management, LLC at NextCure, Inc. (NXTC).
← All monthly rankingsLargest purchases · August 2026
| Source | |||||||
|---|---|---|---|---|---|---|---|
| NXTC | 10% Owner | Purchase | 272,850 | $1.3M | Aug 3 | SEC ↗ | |
| HOG | Director | Purchase | 40,000 | $983K | Aug 3 | SEC ↗ | |
| HUN | Chairman, President & CEO | Purchase | 100,000 | $981K | Aug 3 | SEC ↗ | |
| PFBX | 10% Owner | Purchase | 42,658 | $949K | Aug 3 | SEC ↗ | |
| FTAI | President | Purchase | 2,475 | $498K | Aug 3 | SEC ↗ | |
| VFC | President & Chief Exec Officer | Purchase | 32,894 | $493K | Aug 3 | SEC ↗ | |
| PRQR | Chief Executive Officer | Purchase | 200,000 | $354K | Aug 3 | SEC ↗ | |
| HNVR | President | Purchase | 10,000 | $269K | Aug 3 | SEC ↗ | |
| BSX | Director | Purchase | 5,000 | $227K | Aug 3 | SEC ↗ | |
| APMD | Director | Purchase | 12,500 | $200K | Aug 3 | SEC ↗ | |
| NXTC | 10% Owner | Purchase | 36,303 | $179K | Aug 3 | SEC ↗ | |
| BCML | Director | Purchase | 5,000 | $151K | Aug 3 | SEC ↗ | |
| ACI | President & CFO | Purchase | 9,000 | $103K | Aug 3 | SEC ↗ | |
| GSHD | Director | Purchase | 1,600 | $101K | Aug 3 | SEC ↗ | |
| MBLY | Director | Purchase | 12,360 | $99K | Aug 3 | SEC ↗ | |
| BXSY | See "Explanation of Responses" | Purchase | 5,000 | $86K | Aug 3 | SEC ↗ | |
| DAR | Director | Purchase | 1,000 | $61K | Aug 3 | SEC ↗ | |
| DCX | Chief Executive Officer (CEO) | Purchase | 41,000 | $51K | Aug 3 | SEC ↗ | |
| RDWR | Chief Financial Officer | Purchase | 2,000 | $50K | Aug 3 | SEC ↗ |