JATT II ACQUISITION CORP

Historical 13F Holders

Symbol: JATT
CUSIP: G50765109
All holders as of: Q2 2026
Type: Equity
Class: ORD SHS

Reported Value, Excluding Options

Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for G50765109 since 12/18/2024, newest first.

Filer	% of Class	Shares	Form	Filed
JATT Ventures II L.P. 13D/A Amendment 1	23.1%	1,800,000	13D/A Amendment 1	9/18/2026 Event 4/20/2026
JATT Ventures II L.P.	23.1%	1,800,000
Someit Sidhu	23.1%	1,800,000
JATT Ventures II L.P. 13D	23.1%	1,800,000	13D	9/15/2026 Event 4/20/2026
JATT Ventures II L.P.	23.1%	1,800,000
Someit Sidhu	23.1%	1,800,000
Commodore Capital LP 13G/A Amendment 1	0%	0	13G/A Amendment 1	8/14/2026 Event 6/30/2026
Commodore Capital LP	0%	0
Commodore Capital Master LP	0%	0
Robert Egen Atkinson	0%	0
Michael Kramarz	0%	0
Great Point Partners, LLC 13G/A Amendment 1	6.2%	500,000	13G/A Amendment 1	8/14/2026 Event 6/30/2026
Great Point Partners, LLC	6.2%	500,000
Dr. Jeffrey R. Jay, M.D.	6.2%	500,000
Ms. Lillian Nordahl	6.2%	500,000
Balyasny Asset Management L.P. 13G	6.2%	500,000	13G	8/14/2026 Event 6/30/2026
Balyasny Asset Management L.P.	6.2%	500,000
Bam GP LLC	6.2%	500,000
Balyasny Asset Management Holdings LP	6.2%	500,000
Dames GP LLC	6.2%	500,000
Dmitry Balyasny	6.2%	500,000
ADAR1 Capital Management, LLC 13G	5.4%	417,724	13G	8/14/2026 Event 6/30/2026
ADAR1 Capital Management, LLC	5.4%	417,724
Daniel Schneeberger	5.4%	417,724
Atika Capital Management LLC 13G	5.1%	400,000	13G	8/14/2026 Event 6/30/2026
Atika Capital Management LLC	5.1%	400,000
Brad Farber	5.1%	400,000
Janus Henderson Group Ltd. 13G	6.2%	500,000	13G	8/13/2026 Event 6/30/2026
RA Capital Management, L.P. 13G	6.4%	500,000	13G	4/27/2026 Event 4/20/2026
RA Capital Management, L.P.	6.4%	500,000
Peter Kolchinsky	6.4%	500,000
Rajeev Shah	6.4%	500,000
RA Capital Healthcare Fund, L.P.	6.4%	500,000
Commodore Capital LP 13G	6.4%	500,000	13G	4/24/2026 Event 4/17/2026
Commodore Capital LP	6.4%	500,000
Commodore Capital Master LP	6.4%	500,000
Robert Egen Atkinson	6.4%	500,000
Michael Kramarz	6.4%	500,000
Great Point Partners, LLC 13G	6.4%	500,000	13G	4/24/2026 Event 4/17/2026
Great Point Partners, LLC	6.4%	500,000
Dr. Jeffrey R. Jay, M.D.	6.4%	500,000
Ms. Lillian Nordahl	6.4%	500,000

13F Holders by Quarter

Period	Filings	Shares, Excl. Options	Value, Excl. Options	Options Value
2026 Q2	26	5.66 M	$64.3 M	$0