Artius II Acquisition Inc. (AACB) Institutional Ownership

Institutions by Trading Activity

27,631,950Shares Outstanding

197,656Shares held by institutions

$2,041,786Value of institutional holdings

0.98%Institutional ownership %

2.43%Shares Changed QoQ

4No. of institutional investors

Recent 13F filings as of December 2025 show that 4 institutional investors hold a position in Artius II Acquisition Inc. (NASDAQ:AACB).

The percentage of Artius II Acquisition owned by institutions changed from 80.0% in September 2025 to 1.0% in December 2025, marking a slight down trend.
On a quarter-over-quarter basis, institutional holdings shifted by 2.43%, with a year-over-year an unavailable change in the count of filers.
Of these 4 institutional investors, 1 increased their holdings in Artius II Acquisition, while 2 of them reduced positions, and 1 investors maintained their exposure.
The aggregate institutional position in Artius II Acquisition now stands at 271.02K shares as of December 2025, after investors increased their holdings (up by 6.42K shares quarter on quarter which is down N/A shares year over year).
With 197.66K shares, GRITSTONE ASSET MANAGEMENT LLC commands the largest institutional position in Artius II Acquisition as of December 31, 2025, equating to 0.72% of the company.
Among the most significant buyers of Artius II Acquisition during December 2025 were ABC ARBITRAGE SA (20.00K).
Leading sellers of Artius II Acquisition stock in December 2025 included WOLVERINE ASSET MANAGEMENT LLC (13.47K), FNY Investment Advisers, LLC (110).
The top 4 institutional holders of Artius II Acquisition for the quarter ending December 2025 included GRITSTONE ASSET MANAGEMENT LLC (197.66K), WOLVERINE ASSET MANAGEMENT LLC (53.16K), ABC ARBITRAGE SA (20.00K), FNY Investment Advisers, LLC (212).

197,656 Total Shares Held

Rows:

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	30 Sep, 2025	2,000,000	0	0.00%	$20,260,000.00
Polar Asset Management Partners Inc.	30 Sep, 2025	2,000,000	1,000,000	100.00%	$20,340,000.00
HGC Investment Management Inc.	30 Sep, 2025	1,500,000	1,500,000	0.00%	$15,255,000.00
AQR Arbitrage LLC	30 Sep, 2025	1,490,205	-12,000	-0.80%	$15,095,777.00
GLAZER CAPITAL, LLC	30 Sep, 2025	1,194,892	-23	0.00%	$12,104.00
LINDEN ADVISORS LP	30 Sep, 2025	1,000,000	0	0.00%	$10,130,000.00
Sculptor Capital LP	30 Sep, 2025	1,000,000	-400,000	-28.57%	$10,180,000.00
Westchester Capital Management, LLC	30 Sep, 2025	995,939	0	0.00%	$10,088,862.00
Alberta Investment Management Corp	30 Sep, 2025	980,000	0	0.00%	$9,927,400.00
PICTON MAHONEY ASSET MANAGEMENT	30 Sep, 2025	750,000	0	0.00%	$7,612.00
TWO SIGMA INVESTMENTS, LP	30 Sep, 2025	725,000	0	0.00%	$7,344,250.00
Radcliffe Capital Management, L.P.	30 Sep, 2025	650,000	381,998	142.54%	$6,597,500.00
D. E. Shaw & Co., Inc.	30 Sep, 2025	600,000	0	0.00%	$6,078,000.00
Magnetar Financial LLC	30 Sep, 2025	600,000	0	0.00%	$6,078,000.00
Jain Global LLC	30 Sep, 2025	500,000	0	0.00%	$5,065,000.00
MOORE CAPITAL MANAGEMENT, LP	30 Sep, 2025	500,000	0	0.00%	$5,090,000.00
HBK INVESTMENTS L P	30 Sep, 2025	499,998	-2	0.00%	$5,089,980.00
GOLDMAN SACHS GROUP INC	30 Sep, 2025	462,795	0	0.00%	$4,688,113.00
MANGROVE PARTNERS IM, LLC	30 Sep, 2025	450,000	450,000	0.00%	$4,581,000.00
PERISCOPE CAPITAL INC.	30 Sep, 2025	432,800	204,400	89.49%	$4,392,920.00

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