Artius II Acquisition AACB Institutional Ownership

NASDAQ AACB

$10.59 +0.00 (+0.00%)

At close: Aug 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

52 Institutions

Increased 13 25.0%

Unchanged 24 46.2%

Reduced 15 28.8%

Ownership Statistics

13F · as of 31 Mar, 2026

Institutional Ownership

96.66%

▼-18.76 pp QoQ

Shares Held by Institutions

21.27Mn

of 22.00Mn outstanding

▼-4.05% QoQ

Shares Outstanding

22.00Mn

734.45K held outside 13F filers

Institutional Investors

filed 13F for Mar 2026

▲+5 vs prior quarter

Net Shares Added (QoQ)

-897.48K

distributed since last quarter

Value of Holdings

$225.20Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 31 Mar, 2026

Artius II Acquisition Inc. (NASDAQ:AACB) appears in 52 institutional 13F filings for the quarter ending March 2026.

Their combined ownership stood at 96.7% of outstanding shares in March 2026, down from 115.4% in December 2025.
They decreased total shares held in Artius II Acquisition by -4.05% from the prior quarter, while the number of investors in AACB stayed flat year over year.
Among the 52 funds, 13 bought more Artius II Acquisition shares, 15 sold down, and 24 held their ground.
The aggregate institutional position in Artius II Acquisition amounted to 21.27Mn shares as of March 2026, down by 897.48K shares quarter on quarter, and with no net change year over year.
HGC Investment Management Inc. is the top holder of Artius II Acquisition as of March 31, 2026, with 1.5Mn shares representing 6.82% of outstanding stock.
The biggest buyers of Artius II Acquisition for the quarter ending March 2026 included RLH Capital LLC (321.0K), SONA ASSET MANAGEMENT (US) LLC (172.87K), O'Connor Alternative Investments LLC (160.0K), GLAZER CAPITAL, LLC (139.87K), Quarry LP (100.0K).
Top sellers of AACB stock for the quarter ending March 2026 included Alberta Investment Management Corp (980.0K), Goldman Sachs Group Inc (462.81K), Toronto Dominion Bank (141.94K), Jain Global LLC (133.15K), MANGROVE PARTNERS IM, LLC (93.83K).
Artius II Acquisition's 10 largest shareholders as of March 2026 include HGC Investment Management Inc. (1.5Mn), AQR Arbitrage LLC (1.43Mn), GLAZER CAPITAL, LLC (1.3Mn), LINDEN ADVISORS LP (1.0Mn), Westchester Capital Management, LLC (995.94K), Alberta Investment Management Corp (980.0K), HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND (850.0K), Polar Asset Management Partners Inc. (800.0K), PICTON MAHONEY ASSET MANAGEMENT (750.0K), TWO SIGMA INVESTMENTS, LP (725.0K) per Business Quant data.

Form 13F Holdings

52 Institutional Holders

Report period 31 Mar, 2026

Total shares held 21.27Mn

Of outstanding 96.66%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	HGC Investment Management Inc.	0001711200	1,500,000	6.82%	0	0.00%	$15.51Mn
2	AQR Arbitrage LLC	0001167456	1,432,183	6.51%	▼58,022	-3.89%	$14.79Mn
3	GLAZER CAPITAL, LLC	0001076809	1,295,029	5.89%	▲139,868	+12.11%	$13.39K
4	LINDEN ADVISORS LP	0001279396	1,000,000	4.55%	0	0.00%	$10.33Mn
5	Westchester Capital Management, LLC	0001512805	995,939	4.53%	0	0.00%	$10.29Mn
6	Alberta Investment Management Corp	0001463559	980,000	4.45%	▼980,000	-50.00%	$10.12Mn
7	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	0001535845	850,000	3.86%	0	0.00%	$8.78Mn
8	Polar Asset Management Partners Inc.	0001326389	800,000	3.64%	▼12,332	-1.52%	$8.27Mn
9	PICTON MAHONEY ASSET MANAGEMENT	0001539041	750,000	3.41%	0	0.00%	$7.76Mn
10	TWO SIGMA INVESTMENTS, LP	0001179392	725,000	3.30%	0	0.00%	$7.50Mn
11	Radcliffe Capital Management, L.P.	0001218275	678,671	3.08%	▲11,552	+1.73%	$7.02Mn
12	Magnetar Financial LLC	0001352851	600,000	2.73%	0	0.00%	$6.20Mn
12	D. E. Shaw & Co., Inc.	0001009207	600,000	2.73%	0	0.00%	$6.20Mn
13	Shaolin Capital Management LLC	0001766806	550,000	2.50%	▲60,000	+12.24%	$5.69Mn
13	Hudson Bay Capital Management LP	0001393825	550,000	2.50%	0	0.00%	$5.68Mn
14	Sculptor Capital LP	0001054587	500,000	2.27%	0	0.00%	$5.17Mn
14	MOORE CAPITAL MANAGEMENT, LP	0001448574	500,000	2.27%	0	0.00%	$5.17Mn
15	HBK INVESTMENTS L P	0001011443	499,998	2.27%	0	0.00%	$5.17Mn
16	Goldman Sachs Group Inc	0000886982	462,806	2.10%	▼462,806	-50.00%	$4.79Mn
17	COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS	0001083190	398,075	1.81%	▼1,925	-0.48%	$4.11Mn

Showing 1 to 20 of 52 holders