JATT II Acquisition Corp (JATT)
Nasdaq: JATT · Blank Checks · filing with the SEC since 2026
Who owns JATT II Acquisition Corp
As filed with the SECHolders of 5% or more
7
JATT Ventures II L.P. holds 23.1% of Ordinary Shares, $0.0001 par value, as its SCHEDULE 13D/A filed Sep 18, 2026 says.
Directors and officers
6
report now, of 6 people on the record since 2026. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 7 named at left.
Holders of 5% or moreshare of the class, as filed
JATT Ventures II L.P.
SCHEDULE 13D/A · filed Sep 18, 2026 · Ordinary Shares, $0.0001 par value · 23.1% in Sep 15, 2026
RA Capital Management, L.P.
SCHEDULE 13G · filed Apr 27, 2026 · Ordinary Shares, par value $0.0001 per share
Great Point Partners, LLC
SCHEDULE 13G/A · filed Aug 14, 2026 · Ordinary shares, par value $0.0001 per share · 6.41% in Apr 24, 2026
Balyasny Asset Management L.P.
SCHEDULE 13G · filed Aug 14, 2026 · Common Stock
JANUS HENDERSON GROUP Ltd.
SCHEDULE 13G · filed Aug 13, 2026 · Ordinary Shares
ADAR1 Capital Management, LLC
SCHEDULE 13G · filed Aug 14, 2026 · Ordinary Shares, par value $0.0001 per share
Atika Capital Management LLC
SCHEDULE 13G · filed Aug 14, 2026 · ordinary shares, par value $0.0001 per share
Commodore Capital LP
SCHEDULE 13G/A · filed Aug 14, 2026 · ordinary shares, par value $0.0001 per share · reported falling below 5%, from 6.4% in Apr 24, 2026
What JATT reports owning in othersstakes of 5% or more, and other ties
JATT II Acquisition Corp reports no stake in another company in the record.
Insider tradesForm 4
0sales
1purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
No open-market trade is on the record for these years.
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window2 of 7 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Sidhu Someit | Chief Executive Officer | 0 | $0 | 0 | 1 | $0 |
| Jatt Ventures II L.P. | 10% owner | 0 | $0 | 0 | 1 | $0 |