Insider trading recap: August 27, 2026
On August 27, 2026, insiders filed 46 open-market purchases worth $237.1M across 40 companies, and 143 sales worth $515.5M, on SEC Form 4. The largest purchase was Bertarelli Ernesto (10% Owner) buying $219.0M of Madison Air Solutions Corp (MAIR) at an average $24.97 a share. The largest sale was Meister Keith A. (Director) selling $85.2M of ILLUMINA, INC. (ILMN). 3 companies had several insiders buying on the same day: BIOMERICA INC (BMRA), Chicago Atlantic BDC, Inc. (LIEN), RENN Fund, Inc. (RCG).
Biggest insider buys filed August 27, 2026
Open-market purchases, one row per Form 4, largest first.
| Company | Insider | Value | Shares | Avg price | Traded |
|---|---|---|---|---|---|
| MAIR Madison Air Solutions Corp | Bertarelli Ernesto 10% Owner | $219.0M | 8,770,524 | $24.97 | Aug 25, 2026 |
| IMTX Immatics N.V. | Perceptive Advisors LLC Director | $7.5M | 863,060 | $8.69 | Aug 26, 2026 |
| WELL WELLTOWER INC. | Gundlach Andrew Director | $2.4M | 10,000 | $240.77 | Aug 25, 2026 |
| JTTT JATT III Acquisition Corp | JATT Ventures III L.P. 10% Owner | $2.3M | 234,000 | $10.00 | Aug 27, 2026 |
| SGI SOMNIGROUP INTERNATIONAL INC. | Thompson Scott L CEO & PRESIDENT, Director | $1.9M | 30,000 | $62.84 | Aug 27, 2026 |
| RGNX REGENXBIO Inc. | Ciongoli Gregory Austin Director | $949K | 102,603 | $9.25 | Aug 26, 2026 |
| DGICA DONEGAL GROUP INC | Donegal Mutual Insurance Co 10% Owner | $372K | 19,508 | $19.05 | Aug 25, 2026 |
| LDI loanDepot, Inc. | Hsieh Anthony Li Executive Chair, CEO & Pres., Director, 10% Owner | $289K | 322,961 | $0.90 | Aug 26, 2026 |
| KDP Keurig Dr Pepper Inc. | Alt Aaron E Director | $250K | 7,862 | $31.83 | Aug 25, 2026 |
| CODI Compass Diversified Holdings | Kim Eugene L. See Remarks (a) | $229K | 20,000 | $11.47 | Aug 26, 2026 |
| IPGP IPG PHOTONICS CORP | Peeler John R Director | $199K | 2,710 | $73.58 | Aug 26, 2026 |
| CINF CINCINNATI FINANCIAL CORP | Debbink Dirk J Director | $172K | 1,000 | $171.64 | Aug 25, 2026 |
| HYLN Hyliion Holdings Corp. | Cubbage Vincent T. Director | $170K | 50,000 | $3.40 | Aug 27, 2026 |
| RDVT Red Violet, Inc. | Livek William Paul Director | $143K | 2,000 | $71.49 | Aug 27, 2026 |
| AMRC Ameresco, Inc. | Sakellaris George P Chief Executive Officer, Director, 10% Owner | $113K | 5,000 | $22.66 | Aug 26, 2026 |
Several insiders buying the same stock
Companies where two or more insiders filed purchases this day. All cluster buys.
Biggest insider sales filed August 27, 2026
Selling has many routine reasons (taxes, diversification, planned 10b5-1 sales), so read these as context.
| Company | Insider | Value | Shares | Avg price | Traded |
|---|---|---|---|---|---|
| ILMN ILLUMINA, INC. | Meister Keith A. Director | $85.2M | 375,941 | $226.74 | Aug 25, 2026 |
| CRS CARPENTER TECHNOLOGY CORP | Thene Tony R Chairman, President and CEO, Director | $52.9M | 109,283 | $483.84 | Aug 25, 2026 |
| ABT ABBOTT LABORATORIES | Ford Robert B CHAIRMAN AND CEO, Director | $46.2M | 398,832 | $115.85 | Aug 25, 2026 |
| LITE Lumentum Holdings Inc. | Retort Vincent SEE REMARKS · 10b5-1 | $33.0M | 38,663 | $852.59 | Aug 25, 2026 |
| CRWV CoreWeave, Inc. | Intrator Michael N CEO and President, Director, 10% Owner · 10b5-1 | $27.3M | 307,692 | $88.60 | Aug 25, 2026 |
| FIX COMFORT SYSTEMS USA INC | Lane Brian E. CHIEF EXECUTIVE OFF., Director | $25.8M | 16,024 | $1,608.21 | Aug 26, 2026 |
| GNK GENCO SHIPPING & TRADING LTD | Diana Shipping INC. 10% Owner | $17.2M | 648,256 | $26.55 | Aug 25, 2026 |
| TEM Tempus AI, Inc. | Lefkofsky Eric P CEO and Chairman, Director, 10% Owner · 10b5-1 | $16.3M | 238,152 | $68.39 | Aug 25, 2026 |
| MRCY MERCURY SYSTEMS INC | Ballhaus William L Chairman, President & CEO, Director | $14.1M | 160,166 | $87.72 | Aug 25, 2026 |
| DASH DoorDash, Inc. | Adarkar Prabir PRESIDENT AND COO · 10b5-1 | $12.8M | 55,289 | $231.76 | Aug 25, 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.