Insider trading recap: August 21, 2026
On August 21, 2026, insiders filed 60 open-market purchases worth $26.0M across 52 companies, and 192 sales worth $704.5M, on SEC Form 4. The largest purchase was John Hancock Stable Value Fund Collective Investment Trust (10% Owner) buying $6.0M of Manulife Private Credit Plus Fund (N) at an average $19.89 a share. The largest sale was Lie Sean (Chief Technology Officer) selling $151.1M of Cerebras Systems Inc. (CBRS) under a 10b5-1 plan. 5 companies had several insiders buying on the same day: Global Water Resources, Inc. (GWRS), Innventure, Inc. (INV), NB Bancorp, Inc. (NBBK).
Biggest insider buys filed August 21, 2026
Open-market purchases, one row per Form 4, largest first.
| Company | Insider | Value | Shares | Avg price | Traded |
|---|---|---|---|---|---|
| N Manulife Private Credit Plus Fund | John Hancock Stable Value Fund Collective Investment Trust 10% Owner | $6.0M | 301,659 | $19.89 | Jul 1, 2026 |
| GWRS Global Water Resources, Inc. | Levine Jonathan L Director | $5.8M | 651,618 | $8.85 | Aug 20, 2026 |
| COE 51Talk Online Education Group | Huang Jack Jiajia Chief Executive Officer, Director, 10% Owner · 10b5-1 | $3.9M | 187,020 | $21.02 | Apr 10, 2026 |
| GWRS Global Water Resources, Inc. | Cohn Andrew M. Director | $1.2M | 139,343 | $8.85 | Aug 20, 2026 |
| AAT American Assets Trust, Inc. | Rady Ernest S Executive Chairman, Director, 10% Owner | $1.1M | 50,000 | $22.75 | Aug 21, 2026 |
| ALK ALASKA AIR GROUP, INC. | Minicucci Benito CEO AND PRESIDENT, Director | $1.0M | 25,000 | $40.06 | Aug 20, 2026 |
| ELAN Elanco Animal Health Inc | Kurzius Lawrence Erik Director | $936K | 40,000 | $23.40 | Aug 20, 2026 |
| MED MEDIFAST INC | Kiai Parsa Director | $843K | 72,487 | $11.63 | Aug 19, 2026 |
| DXST Decent Holding Inc. | Sun Dingxin Director, 10% Owner | $800K | 400,000 | $2.00 | Aug 6, 2026 |
| PRTA PROTHENA CORP PUBLIC LTD CO | Scully William P 10% Owner | $439K | 50,000 | $8.79 | Aug 20, 2026 |
| DGICA DONEGAL GROUP INC | Donegal Mutual Insurance Co 10% Owner | $364K | 19,515 | $18.63 | Aug 19, 2026 |
| INV Innventure, Inc. | Otworth Michael Executive Chairman, Director | $349K | 231,000 | $1.51 | Aug 20, 2026 |
| INV Innventure, Inc. | Donnally James O Director | $338K | 225,000 | $1.50 | Aug 20, 2026 |
| NOMD Nomad Foods Ltd | Baldew Ruben Chief Financial Officer, Director | $335K | 28,290 | $11.85 | Aug 19, 2026 |
| AEON AEON Biopharma, Inc. | Lynch Timothy P 10% Owner | $243K | 1,150,000 | $0.21 | Aug 19, 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 21, 2026
Selling has many routine reasons (taxes, diversification, planned 10b5-1 sales), so read these as context.
| Company | Insider | Value | Shares | Avg price | Traded |
|---|---|---|---|---|---|
| CBRS Cerebras Systems Inc. | Lie Sean Chief Technology Officer · 10b5-1 | $151.1M | 726,540 | $207.90 | Aug 20, 2026 |
| ILMN ILLUMINA, INC. | Meister Keith A. Director | $145.6M | 679,574 | $214.19 | Aug 19, 2026 |
| MANE Veradermics, Inc | Montanova Capital, LLC Director | $80.4M | 750,000 | $107.25 | Aug 19, 2026 |
| NET Cloudflare, Inc. | Zatlyn Michelle President and Board Co-Chair, Director · 10b5-1 | $28.3M | 99,009 | $285.71 | Aug 19, 2026 |
| MEDP Medpace Holdings, Inc. | Troendle August J. President & CEO, Director, 10% Owner | $26.3M | 42,783 | $614.30 | Aug 19, 2026 |
| AMD ADVANCED MICRO DEVICES INC | Papermaster Mark D Chief Technology Officer & EVP · 10b5-1 | $13.6M | 28,811 | $471.87 | Aug 20, 2026 |
| ROIV Roivant Sciences Ltd. | Sukhatme Mayukh President & CIO, Director | $12.4M | 335,174 | $36.88 | Aug 19, 2026 |
| ITW ILLINOIS TOOL WORKS INC | Santi Ernest Scott Director | $11.9M | 41,431 | $287.09 | Aug 19, 2026 |
| DDOG Datadog, Inc. | Pomel Olivier Chief Executive Officer, Director · 10b5-1 | $11.1M | 47,054 | $235.49 | Aug 19, 2026 |
| MDLZ Mondelez International, Inc. | Van de Put Dirk Chief Executive Officer, Director · 10b5-1 | $8.6M | 133,580 | $64.08 | Aug 19, 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.