JATT: JATT II Acquisition Corp. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-09-18 | 13D amendment | JATT Ventures II L.P. | 23.10% | SEC | |
| 2026-09-15 | New 13D stake | JATT Ventures II L.P. | 23.10% | SEC | |
| 2026-08-14 | New 13G stake | ADAR1 Capital Management, LLC | 5.40% | SEC | |
| 2026-08-14 | Fell below 5% | Commodore Capital LP | 0.00% | SEC | |
| 2026-08-14 | 13G amendment | Great Point Partners, LLC | 6.23% | SEC | |
| 2026-08-14 | New 13G stake | Atika Capital Management LLC | 5.10% | SEC | |
| 2026-08-14 | New 13G stake | BALYASNY ASSET MANAGEMENT L.P. | 6.23% | SEC | |
| 2026-08-13 | New 13G stake | JANUS HENDERSON GROUP Ltd. | 6.20% | SEC |
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