Vault-13

ARTIUS II ACQUISITION INC

SHS CL A · CUSIP G0509J115

43 institutional holders +2 vs Q2 2025
21,102,31821.1m shares reported held*
$214.1mreported value*
5 new 6 added 11 reduced 3 sold out net bought ≈ $21.4m (+2.1m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $10.15.

Trends to Q3 2025

Institutional holders

Managers reporting a position, each quarter

0204060Q2 25: 41Q3 25: 4343Q2 25Q3 25
Numbers
QuarterHolders
Q2 202541
Q3 202543

Biggest buyers

HGC Investment Management Inc. New +1,500,000+1.5m
MANGROVE PARTNERS IM, LLC New +450,000+450.0k
Radcliffe Capital Management, L.P. Added +381,998+382.0k
RIVERNORTH CAPITAL MANAGEMENT, LLC New +299,872+299.9k
Shaolin Capital Management LLC Added +221,756+221.8k
Periscope Capital Inc. Added +204,400+204.4k
MILLENNIUM MANAGEMENT LLC New +200,000+200.0k
Verition Fund Management LLC New +56,098+56.1k
WOLVERINE ASSET MANAGEMENT LLC Added +3,070+3.1k
FNY Investment Advisers, LLC Added +220+220

Biggest sellers

Sculptor Capital LP Reduced -400,000-400.0k
Alpine Global Management, LLC Sold out -288,211-288.2k
TORONTO DOMINION BANK Reduced -212,015-212.0k
K2 PRINCIPAL FUND, L.P. Sold out -112,006-112.0k
BOOTHBAY FUND MANAGEMENT, LLC Reduced -50,000-50.0k
ATW SPAC MANAGEMENT LLC Reduced -50,000-50.0k
Context Capital Management, LLC Reduced -50,000-50.0k
BARDIN HILL MANAGEMENT PARTNERS LP Sold out -25,027-25.0k
AQR Arbitrage LLC Reduced -12,000-12.0k
Virtu Financial LLC Reduced -7,027-7.0k

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Artius II Acquisition Partners LLC 13G · exempt (held before listing) new · filed 2025-02-14 20.5% new 5.7m≈ $59.5m 2025-02-14
HGC Investment Management Inc. 13G · institution new · filed 2026-02-17 6.8% new 1.5m≈ $15.7m 2026-02-17
AQR CAPITAL MANAGEMENT LLC 13G · institution -2.6 pts · filed 2025-08-14 6.3% -2.6 pts 1.5m≈ $15.8m 2025-08-14

Fell to 5% or below in the last year: Polar Asset Management Partners Inc. (3.6%, 2026-02-17), HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND (3.8%, 2026-02-13)

Holders, Q3 2025

#ManagerLocationShares Value% of their portfolioChangeShares change
1 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.04% of their portfolio TORONTO, A6 2,000,0002.0m $20.3m $20.3m 0.04% Unchanged
2 HGC Investment Management Inc. 3.72% of their portfolio TORONTO, A6 1,500,0001.5m $15.3m $15.3m 3.72% New
3 AQR Arbitrage LLC 0.38% of their portfolio Greenwich, CT 1,490,2051.5m $15.1m $15.1m 0.38% Reduced -12.0k -12,000
4 GLAZER CAPITAL, LLC 0.41% of their portfolio New York, NY 1,194,8921.2m $12.1m $12.1m 0.41% Reduced -23 -23
5 Sculptor Capital LP 0.14% of their portfolio New York, NY 1,000,0001.0m $10.2m $10.2m 0.14% Reduced -400.0k -400,000
6 Linden Advisors LP 0.07% of their portfolio New York, NY 1,000,0001.0m $10.1m $10.1m 0.07% Unchanged
7 Polar Asset Management Partners Inc. 0.21% of their portfolio TORONTO, A6 1,000,0001.0m $10.2m $10.2m 0.21% Unchanged
8 Westchester Capital Management, LLC 0.52% of their portfolio VALHALLA, NY 995,939995.9k $10.1m $10.1m 0.52% Unchanged
9 Alberta Investment Management Corp 0.07% of their portfolio EDMONTON, A0 980,000980.0k $9.9m $9.9m 0.07% Unchanged
10 PICTON MAHONEY ASSET MANAGEMENT 0.10% of their portfolio Toronto, A6 750,000750.0k $7.6m $7.6m 0.10% Unchanged
11 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 725,000725.0k $7.3m $7.3m 0.01% Unchanged
12 Radcliffe Capital Management, L.P. 0.41% of their portfolio BALA CYNWYD, PA 650,000650.0k $6.6m $6.6m 0.41% Added +382.0k +381,998
13 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 600,000600.0k $6.1m $6.1m 0.00% Unchanged
14 Magnetar Financial LLC 0.04% of their portfolio EVANSTON, IL 600,000600.0k $6.1m $6.1m 0.04% Unchanged
15 MOORE CAPITAL MANAGEMENT, LP 0.10% of their portfolio NEW YORK, NY 500,000500.0k $5.1m $5.1m 0.10% Unchanged
16 Jain Global LLC 0.07% of their portfolio NEW YORK, NY 500,000500.0k $5.1m $5.1m 0.07% Unchanged
17 HBK INVESTMENTS L P 0.08% of their portfolio DALLAS, TX 499,998500.0k $5.1m $5.1m 0.08% Reduced -2 -2
18 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 462,795462.8k $4.7m $4.7m 0.00% Unchanged
19 MANGROVE PARTNERS IM, LLC 0.34% of their portfolio Greenwich, CT 450,000450.0k $4.6m $4.6m 0.34% New
20 Periscope Capital Inc. 1.07% of their portfolio Toronto, A6 432,800432.8k $4.4m $4.4m 1.07% Added +204.4k +204,400
21 COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.02% of their portfolio HARRISBURG, PA 400,000400.0k $4.1m $4.1m 0.02% Unchanged
22 BERKLEY W R CORP 0.26% of their portfolio Greenwich, CT 396,960397.0k $4.0m $4.0m 0.26% Unchanged
23 First Trust Capital Management L.P. 0.25% of their portfolio CHICAGO, IL 380,000380.0k $3.9m $3.9m 0.25% Unchanged
24 Shaolin Capital Management LLC 0.18% of their portfolio Miami, FL 371,756371.8k $3.8m $3.8m 0.18% Added +221.8k +221,756
25 RIVERNORTH CAPITAL MANAGEMENT, LLC 0.17% of their portfolio WEST PALM BEACH, FL 299,872299.9k $3.0m $3.0m 0.17% New
26 Governors Lane LP 0.35% of their portfolio NEW YORK, NY 250,000250.0k $2.5m $2.5m 0.35% Unchanged
27 Schonfeld Strategic Advisors LLC 0.02% of their portfolio NEW YORK, NY 236,499236.5k $2.4m $2.4m 0.02% Reduced -3.5k -3,501
28 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 200,000200.0k $2.0m $2.0m 0.00% New
29 GRITSTONE ASSET MANAGEMENT LLC 2.07% of their portfolio Bethesda, MD 197,656197.7k $2.0m $2.0m 2.07% Reduced -2.3k -2,344
30 OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) 0.05% of their portfolio CHICAGO, IL 160,000160.0k $1.6m $1.6m 0.05% Unchanged
31 MIZUHO SECURITIES USA LLC 0.03% of their portfolio NEW YORK, NY 150,018150.0k $1.5m $1.5m 0.03% Unchanged
32 TORONTO DOMINION BANK 0.00% of their portfolio TORONTO, ONTARIO, A6 150,000150.0k $1.5m $1.5m 0.00% Reduced -212.0k -212,015
33 Context Capital Management, LLC 0.04% of their portfolio LAJOLLA, CA 112,191112.2k $1.1m $1.1m 0.04% Reduced -50.0k -50,000
34 Centiva Capital, LP 0.09% of their portfolio New York, NY 100,000100.0k $1.0m $1.0m 0.09% Unchanged
35 BOOTHBAY FUND MANAGEMENT, LLC 0.02% of their portfolio NEW YORK, NY 75,31675.3k $764.5k $764.5k 0.02% Reduced -50.0k -50,000
36 ATW SPAC MANAGEMENT LLC 0.97% of their portfolio NEW YORK, NY 75,31675.3k $766.7k $766.7k 0.97% Reduced -50.0k -50,000
37 WOLVERINE ASSET MANAGEMENT LLC 0.01% of their portfolio CHICAGO, IL 66,62866.6k $674.9k $674.9k 0.01% Added +3.1k +3,070
38 Verition Fund Management LLC 0.00% of their portfolio GREENWICH, CT 56,09856.1k $568.3k $568.3k 0.00% New
39 DLD Asset Management, LP 0.05% of their portfolio NEW YORK, NY 40,89440.9k $416.3k $416.3k 0.05% Unchanged
40 Clear Street Group Inc. 0.00% of their portfolio NEW YORK, NY 37,97338.0k $386.6k $386.6k 0.00% First filing
41 Virtu Financial LLC 0.01% of their portfolio New York, NY 13,11213.1k $133.0k $133.0k 0.01% Reduced -7.0k -7,027
42 FNY Investment Advisers, LLC 0.00% of their portfolio NEW YORK, NY 322322 $3.0k $3.0k 0.00% Added +220 +220
43 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 7878 $790 $790 0.00% Added +15 +15