Week of Apr 20 – Apr 24, 2026
By Trabud Research Team · SEC Form 4 & insider trading data analysts
Last updated:
Bain Capital entities led insider buying with $159 million in KLRA purchases, while EcoR1 Capital added $65 million in TRAX and GoldenTree deployed $20 million into NONE. On the sell side, Pentwater Capital Management executed over $1.75 billion in CAR sales across three tranches, with additional large exits including $247 million from ASX by Tien-Szu Chen and $232 million from RDW by AE Industrial Partners funds. The activity signals concentrated institutional profit-taking in CAR alongside targeted venture and activist accumulation in smaller biotechs.
- Total bought
- $311.4M
- 10 filings
- Total sold
- $2.8B
- 10 filings
- Companies
- 12
- tracked this week
- Net flow
- −$2.5B
- net selling
Top insider buys
| # | Company | Insider | Shares | Value |
|---|---|---|---|---|
| 1 | KLRA◇3Kailera Therapeutics, Inc. | BAIN CAPITAL INVESTORS LLCOther | 8.4M | $134.4M |
| 2 | TRAXFirst Tracks Biotherapeutics, Inc. | EcoR1 Capital, LLCOther | 4.7M | $65.0M |
| 3 | KLRA◇3Kailera Therapeutics, Inc. | Bain Capital Life Sciences Investors, LLCOther | 1.6M | $25.0M |
| 4 | NONE◇2GoldenTree Opportunistic Credit Fund | Steven A. TananbaumOther | 2.0M | $20.0M |
| 5 | TOROTORO CORP. | Petros Panagiotis PanagiotidisCEO | 2.3M | $14.3M |
| 6 | PRLD◇2Prelude Therapeutics Inc | David P BonitaDirector | 2.8M | $12.5M |
| 7 | PRLD◇2Prelude Therapeutics Inc | ORBIMED ADVISORS LLCDirector | 2.8M | $12.5M |
| 8 | COE51Talk Online Education Group | Jack Jiajia HuangCEO | 446.7K | $12.2M |
| 9 | KLRA◇3Kailera Therapeutics, Inc. | RTW INVESTMENTS, LPOther | 500.0K | $8.0M |
| 10 | NONE◇2Privacore VPC Asset Backed Credit Fund | Corbin Capital Partners, L.P.Other | 746.3K | $7.5M |
Top insider sells
| # | Company | Insider | Shares | Value |
|---|---|---|---|---|
| 1 | CAR◇3AVIS BUDGET GROUP, INC. | Pentwater Capital Management LPOther | 1.6M | $1.0B |
| 2 | CAR◇3AVIS BUDGET GROUP, INC. | Pentwater Capital Management LPOther | 1.9M | $510.9M |
| 3 | ASXASE Technology Holding Co., Ltd. | Tien-Szu ChenOther | 530.0K | $247.1M |
| 4 | RDWRedwire Corp | Michael Robert GreeneDirector | 21.4M | $231.8M |
| 5 | CAR◇3AVIS BUDGET GROUP, INC. | Pentwater Capital Management LPOther | 843.2K | $223.1M |
| 6 | SMRNUSCALE POWER Corp | FLUOR CORPDirector | 13.5M | $159.4M |
| 7 | CRWV◇3CoreWeave, Inc. | Brian M VenturoOther | 1.1M | $130.4M |
| 8 | CRWV◇3CoreWeave, Inc. | David J. SnydermanOther | 961.2K | $117.4M |
| 9 | CRWV◇3CoreWeave, Inc. | David J. SnydermanOther | 857.4K | $104.7M |
| 10 | ANETArista Networks, Inc. | Jayshree UllalCEO | 428.0K | $75.9M |
Quick Answer
What were the biggest insider trades the week of Apr 20 – Apr 24, 2026?
For the week of Apr 20 – Apr 24, 2026, the biggest buy was $134.4M of KLRA by BAIN CAPITAL INVESTORS LLC; the biggest sale was $1.0B of CAR by Pentwater Capital Management LP.
Source: SEC EDGAR Form 4
Frequently Asked Questions
Which insider bought the most the week of Apr 20 – Apr 24, 2026?
BAIN CAPITAL INVESTORS LLC (Other) bought $134.4M of Kailera Therapeutics, Inc. (KLRA) — the largest insider purchase of the week by dollar value.
Which insider sold the most the week of Apr 20 – Apr 24, 2026?
Pentwater Capital Management LP (Other) sold $1.0B of AVIS BUDGET GROUP, INC. (CAR) — the largest insider sale of the week by dollar value.
How are these insider trades ranked?
Trabud ranks each week's SEC Form 4 filings by total transaction dollar value, surfacing the largest open-market insider buys and sells. All data comes directly from official SEC EDGAR filings.
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