What does CUSIP G0509J115 represent in this 13F holders report?

CUSIP G0509J115 is the security identifier for AACB - Artius II Acquisition Inc. - Class A Common Stock used to aggregate holder disclosures.

How many institutions held AACB - Artius II Acquisition Inc. - Class A Common Stock in Q3 2025?

43 institutional investors reported AACB - Artius II Acquisition Inc. - Class A Common Stock for Q3 2025. Use the holders table for investor-level position and value details.

Artius II Acquisition Inc. - Class A Common Stock (AACB)

CUSIP: G0509J115

Q3 2025 13F Holders as of 30 Sep 2025

Type / Class: Equity / Class A Common Stock
Shares outstanding: 22,189,349
Total 13F shares: 21,102,318
Share change: +2,105,273
Total reported value: $214,091,451
Price per share: $10.14
Number of holders: 43
Value change: +$21,410,423
Number of buys: 11
Number of sells: 14

Quarterly Holders Quick Answers

What is CUSIP G0509J115?
CUSIP G0509J115 identifies AACB - Artius II Acquisition Inc. - Class A Common Stock in SEC institutional holdings data.

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Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q4 2025
Previous quarter: Q2 2025

Recent filing periods for CUSIP G0509J115:

Q1 2026 Q4 2025 Q3 2025 Q2 2025

Top shareholders of AACB - Artius II Acquisition Inc. - Class A Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Artius II Acquisition Partners LLC	13D/G 3/4/5	10%+ Owner	20%	5,675,000	$56,069,000	$0	14 Feb 2025	13D/G 3/4/5
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	13F	Company	— mixed-class rows	4,000,000 mixed-class rows	$20,800,000	—	30 Jun 2025	13F
AQR Arbitrage LLC	13F	Company	— mixed-class rows	3,482,205 mixed-class rows	$15,756,715	—	30 Jun 2025	13F
HGC Investment Management Inc.	13F	Company	6.8%	1,500,000	$15,495,000	—	30 Jun 2025	13F
AQR CAPITAL MANAGEMENT LLC	13D/G	—	6.4%	1,502,205	$15,202,315	-$4,835,285	30 Jun 2025	13D/G
Polar Asset Management Partners Inc.	13D/G 13F	Company	6.3%	1,500,000	$15,120,000	$0	31 Mar 2025	13D/G 13F
Sculptor Capital LP	13F 13D/G	Company	4.5% from 13D/G	3,380,000 mixed-class rows	$14,643,200	—	30 Jun 2025	13F 13D/G
GLAZER CAPITAL, LLC	13D/G 13F	Company	5.5%	1,218,664	$12,284,133	$0	31 Mar 2025	13D/G 13F
LINDEN ADVISORS LP	13F	Company	— mixed-class rows	2,375,000 mixed-class rows	$10,463,888	—	30 Jun 2025	13F
Alberta Investment Management Corp	13F	Company	— mixed-class rows	1,960,000 mixed-class rows	$10,152,800	—	30 Jun 2025	13F
Westchester Capital Management, LLC	13F	Company	4.5%	995,939	$10,078,903	—	30 Jun 2025	13F
PICTON MAHONEY ASSET MANAGEMENT	13F	Company	— mixed-class rows	1,250,000 mixed-class rows	$7,711,000	—	30 Jun 2025	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	3.3%	725,000	$7,337,000	—	30 Jun 2025	13F
Magnetar Financial LLC	13F	Company	— mixed-class rows	1,200,000 mixed-class rows	$6,234,000	—	30 Jun 2025	13F
D. E. Shaw & Co., Inc.	13F	Company	2.7%	600,000	$6,072,000	—	30 Jun 2025	13F
HBK INVESTMENTS L P	13F	Company	— mixed-class rows	1,000,000 mixed-class rows	$5,200,000	—	30 Jun 2025	13F
MOORE CAPITAL MANAGEMENT, LP	13F	Company	— mixed-class rows	1,000,000 mixed-class rows	$5,200,000	—	30 Jun 2025	13F
Jain Global LLC	13F	Company	2.3%	500,000	$5,060,000	—	30 Jun 2025	13F
GOLDMAN SACHS GROUP INC	13F	Company	2.1%	462,795	$4,683,485	—	30 Jun 2025	13F
LMR Partners LLP	13F	Company	1.8%	400,000	$4,200,000	—	30 Jun 2025	13F
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS	13F	Company	— mixed-class rows	798,909 mixed-class rows	$4,159,695	—	30 Jun 2025	13F
BERKLEY W R CORP	13F	Company	— mixed-class rows	521,010 mixed-class rows	$4,047,007	—	30 Jun 2025	13F
TORONTO DOMINION BANK	13F	Company	— mixed-class rows	1,307,834 mixed-class rows	$3,890,589	—	30 Jun 2025	13F
First Trust Capital Management L.P.	13F	Company	1.7%	380,000	$3,845,600	—	30 Jun 2025	13F
RIVERNORTH CAPITAL MANAGEMENT, LLC	13F	Company	1.4%	300,000	$3,150,000	—	30 Jun 2025	13F
Alpine Global Management, LLC	13F	Company	— mixed-class rows	618,213 mixed-class rows	$2,995,895	—	30 Jun 2025	13F
Radcliffe Capital Management, L.P.	13F	Company	1.2%	268,002	$2,712,180	—	30 Jun 2025	13F
Governors Lane LP	13F	Company	1.1%	250,000	$2,530,000	—	30 Jun 2025	13F
Schonfeld Strategic Advisors LLC	13F	Company	— mixed-class rows	527,641 mixed-class rows	$2,497,833	—	30 Jun 2025	13F
PERISCOPE CAPITAL INC.	13F	Company	— mixed-class rows	403,400 mixed-class rows	$2,353,408	—	30 Jun 2025	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	— mixed-class rows	700,000 mixed-class rows	$2,220,000	—	30 Jun 2025	13F
GRITSTONE ASSET MANAGEMENT LLC	13F	Company	— mixed-class rows	400,000 mixed-class rows	$2,072,000	—	30 Jun 2025	13F
Shaolin Capital Management LLC	13F	Company	— mixed-class rows	1,000,000 mixed-class rows	$1,722,000	—	30 Jun 2025	13F
Context Capital Management, LLC	13F	Company	— mixed-class rows	324,382 mixed-class rows	$1,680,299	—	30 Jun 2025	13F
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)	13F	Company	0.72%	160,000	$1,619,200	—	30 Jun 2025	13F
MIZUHO SECURITIES USA LLC	13F	Company	— mixed-class rows	250,018 mixed-class rows	$1,518,180	—	30 Jun 2025	13F
ATW SPAC MANAGEMENT LLC	13F	Company	— mixed-class rows	250,632 mixed-class rows	$1,298,274	—	30 Jun 2025	13F
BOOTHBAY FUND MANAGEMENT, LLC	13F	Company	— mixed-class rows	250,632 mixed-class rows	$1,298,274	—	30 Jun 2025	13F
K2 PRINCIPAL FUND, L.P.	13F	Company	— mixed-class rows	224,012 mixed-class rows	$1,160,382	—	30 Jun 2025	13F
Centiva Capital, LP	13F	Company	— mixed-class rows	200,000 mixed-class rows	$1,040,000	—	30 Jun 2025	13F
CLEAR STREET LLC	13F	Company	— mixed-class rows	307,573 mixed-class rows	$854,704	—	30 Jun 2025	13F
WOLVERINE ASSET MANAGEMENT LLC	13F	Company	0.29%	63,558	$643,206	—	30 Jun 2025	13F
DLD Asset Management, LP	13F	Company	0.18%	40,894	$413,847	—	30 Jun 2025	13F
BARDIN HILL MANAGEMENT PARTNERS LP	13F	Company	0.11%	25,027	$253,273	—	30 Jun 2025	13F
Virtu Financial LLC	13F	Company	0.09%	20,139	$204,000	—	30 Jun 2025	13F
Harraden Circle Investments, LLC	13F	Company	— class O/S missing	523,500	$125,640	—	30 Jun 2025	13F
Decagon Asset Management LLP	13F	Company	— class O/S missing	350,296	$84,071	—	30 Jun 2025	13F
METEORA CAPITAL, LLC	13F	Company	— class O/S missing	232,800	$55,872	—	30 Jun 2025	13F
Verition Fund Management LLC	13F	Company	— class O/S missing	123,059	$34,457	—	30 Jun 2025	13F
Parallax Volatility Advisers, L.P.	13F	Company	— class O/S missing	35,500	$8,520	—	30 Jun 2025	13F

Institutional Holders of Artius II Acquisition Inc. - Class A Common Stock (AACB) as of Q3 2025

As of 30 Sep 2025, Artius II Acquisition Inc. - Class A Common Stock (AACB) was held by 43 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 21,102,318 shares. The largest 10 holders included HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND, HGC Investment Management Inc., AQR Arbitrage LLC, GLAZER CAPITAL, LLC, Linden Advisors LP, Polar Asset Management Partners Inc., Sculptor Capital LP, Westchester Capital Management, LLC, Alberta Investment Management Corp, and PICTON MAHONEY ASSET MANAGEMENT. This page lists 43 institutional shareholders reporting positions in this security for the Q3 2025 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q3 2025 vs Q2 2025 Across Filers

Q2 2025 holders

Q3 2025 holders

Holder diff

Investor	Q2 2025 Shares	Q3 2025 Shares	Share Diff	Share Chg %	Q2 2025 Value $	Q3 2025 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.