Insider trading recap: September 23, 2026
On September 23, 2026, insiders filed 37 open-market purchases worth $68.2M across 36 companies, and 113 sales worth $267.9M, on SEC Form 4. The largest purchase was Gordon Carl L (Director, 10% Owner) buying $20.0M of Electra Therapeutics, Inc. (ETRA) at an average $15.00 a share. The largest sale was Troendle August J. (President & CEO, Director, 10% Owner) selling $44.4M of Medpace Holdings, Inc. (MEDP). One company had several insiders buying on the same day: Electra Therapeutics, Inc. (ETRA).
The write-up, company by company: insider buying on September 23, 2026 · insider selling on September 23, 2026.
Biggest insider buys filed September 23, 2026
Open-market purchases, one row per Form 4, largest first.
| Company | Insider | Value | Shares | Avg price | Traded |
|---|---|---|---|---|---|
| ETRA Electra Therapeutics, Inc. | Gordon Carl L Director, 10% Owner | $20.0M | 1,333,333 | $15.00 | Sep 21, 2026 |
| ETRA Electra Therapeutics, Inc. | Orbimed Advisors LLC Director, 10% Owner | $20.0M | 1,333,333 | $15.00 | Sep 21, 2026 |
| CV CapsoVision, Inc | Harari Eliyahou Et Al 10% Owner | $10.0M | 1,757,469 | $5.69 | Sep 18, 2026 |
| CRBG Corebridge Financial, Inc. | Nippon Life Insurance Co 10% Owner · 10b5-1 | $7.5M | 212,828 | $35.08 | Sep 21, 2026 |
| CRAFX Cascade Real Assets Fund | Nesbitt Stephen Lane President, Director | $5.0M | 500,000 | $10.00 | Sep 21, 2026 |
| KBDC Kayne Anderson BDC, Inc. | Robo James L Director | $1.5M | 114,961 | $13.09 | Sep 22, 2026 |
| — Diameter Dynamic Credit Fund | Lewinsohn Jonathan Co-President, Portfolio Manager | $1.0M | 98,814 | $10.12 | Sep 10, 2026 |
| AXIA3 AXIA Energia S.A. | Batista de Lima Filho Pedro Director | $960K | 91,000 | $10.55 | Sep 21, 2026 |
| INBX Inhibrx Biosciences, Inc. | Kayyem Jon Faiz Director | $500K | 5,000 | $100.00 | Sep 23, 2026 |
| INR INFINITY NATURAL RESOURCES, INC. | Gieselman Scott Director | $364K | 28,467 | $12.78 | Sep 21, 2026 |
| TNC TENNANT CO | Allen Patrick E Director | $208K | 3,000 | $69.42 | Aug 31, 2026 |
| AIAI AIAI Holdings Corp | Affeldt Eric Director | $150K | 42,857 | $3.50 | Sep 22, 2026 |
| BPRE Bluerock Private Real Estate Fund | MacDonald Ryan S Director | $125K | 10,400 | $11.97 | Sep 21, 2026 |
| SPRU SPRUCE POWER HOLDING CORP | Steel Partners Holdings L.P. 10% Owner | $108K | 52,780 | $2.04 | Sep 21, 2026 |
| DFDV DeFi Development Corp. | Kang Daniel Chief Strategy Officer | $92K | 10,440 | $8.83 | Sep 22, 2026 |
Several insiders buying the same stock
Companies where two or more insiders filed purchases this day. All cluster buys.
| Company | Insiders | Value |
|---|---|---|
| ETRA Electra Therapeutics, Inc. | 2 | $40.0M |
Biggest insider sales filed September 23, 2026
Selling has many routine reasons (taxes, diversification, planned 10b5-1 sales), so read these as context.
| Company | Insider | Value | Shares | Avg price | Traded |
|---|---|---|---|---|---|
| MEDP Medpace Holdings, Inc. | Troendle August J. President & CEO, Director, 10% Owner | $44.4M | 70,901 | $626.62 | Sep 21, 2026 |
| HOOD Robinhood Markets, Inc. | Tenev Vladimir Chief Executive Officer, Director · 10b5-1 | $32.5M | 259,166 | $125.58 | Sep 21, 2026 |
| META Meta Platforms, Inc. | Cox Christopher K Chief Product Officer · 10b5-1 | $28.5M | 40,000 | $712.76 | Sep 21, 2026 |
| BEKE KE Holdings Inc. | Shan Yigang Executive Director, Director | $18.1M | 3,326,670 | $5.44 | Sep 21, 2026 |
| AUGO Aura Minerals Inc. | Sousa Mauad Bruno Director | $15.0M | 166,000 | $90.65 | Sep 22, 2026 |
| BLSH Bullish | Bliss Andrew Director · 10b5-1 | $9.9M | 245,129 | $40.46 | Sep 21, 2026 |
| ANET Arista Networks, Inc. | Duda Kenneth President and CTO, Director · 10b5-1 | $8.8M | 43,333 | $203.50 | Sep 21, 2026 |
| COIN Coinbase Global, Inc. | Haas Alesia J Chief Financial Officer · 10b5-1 | $8.0M | 39,030 | $205.24 | Sep 21, 2026 |
| NVDA NVIDIA CORP | Teter Timothy S. EVP, General Counsel and Sec · 10b5-1 | $6.8M | 30,460 | $222.80 | Sep 21, 2026 |
| DUOL Duolingo, Inc. | von Ahn Luis President & CEO, Co-Founder, Director, 10% Owner · 10b5-1 | $6.2M | 40,980 | $150.65 | Sep 21, 2026 |
Grouped by the day the Form 4 reached SEC EDGAR. Values are shares times the reported price; a price far from the market close is treated as a typo and left out. Not investment advice.