Artius II Acquisition Inc. (AACB) — Institutional Holders, Q2 2026
57 institutional investment managers reported a AACB position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $230.8M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
AACB in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- Governors LaneAdded · +250,000 sh+$1.6M
- HIGHBRIDGE CAPITAL MANAGEMENTNew · +177,898 sh+$1.1M
- MIZUHO SECURITIES USAAdded · +100,196 sh+$639.1K
- TORONTO DOMINION BANKAdded · +92,058 sh+$587.2K
- PERISCOPE CAPITALAdded · +60,000 sh+$382.7K
Biggest sellers
- Fort Baker Capital ManagementSold out · -232,736 sh-$1.5M
- Shaolin Capital ManagementTrimmed · -193,804 sh-$1.2M
- RLH CapitalTrimmed · -168,760 sh-$1.1M
- Jain GlobalTrimmed · -164,758 sh-$1.1M
- Verition Fund ManagementTrimmed · -100,834 sh-$643.2K
AACB 13F holders ranked 1–57 of 57
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | HGC Investment Management#1 · 3,000,000 sh | 3,000,000 | $16.1M | 3.17% | 0.0% |
| 2 | AQR Arbitrage#2 · 2,939,770 sh | 2,939,770 | $15.4M | 0.22% | +0.7% |
| 3 | GLAZER CAPITAL#3 · 1,570,130 sh | 1,570,130 | $13.6M | 0.34% | 0.0% |
| 4 | LINDEN ADVISORS#4 · 2,375,000 sh | 2,375,000 | $10.8M | 0.06% | 0.0% |
| 5 | Alberta Investment Management#5 · 1,960,000 sh | 1,960,000 | $10.5M | 0.06% | 0.0% |
| 6 | Westchester Capital Management#6 · 995,939 sh | 995,939 | $10.4M | 0.51% | 0.0% |
| 7 | HEALTHCARE OF ONTARIO PENSION PLAN FUND#7 · 2,850,000 sh | 2,850,000 | $9.3M | 0.01% | 0.0% |
| 8 | Polar Asset Management Partners#8 · 2,300,000 sh | 2,300,000 | $8.7M | 0.14% | 0.0% |
| 9 | PICTON MAHONEY ASSET MANAGEMENT#9 · 1,250,000 sh | 1,250,000 | $8.0M | 0.06% | 0.0% |
| 10 | TWO SIGMA INVESTMENTS#10 · 725,000 sh | 725,000 | $7.6M | <0.01% | 0.0% |
| 11 | Radcliffe Capital Management, L.P.#11 · 928,720 sh | 928,720 | $7.2M | 0.55% | 0.0% |
| 12 | Magnetar Financial#12 · 1,200,000 sh | 1,200,000 | $6.4M | 0.06% | 0.0% |
| 13 | D. E. Shaw#13 · 600,000 sh | 600,000 | $6.3M | <0.01% | 0.0% |
| 14 | Hudson Bay Capital Management#14 · 550,000 sh | 550,000 | $5.8M | 0.02% | 0.0% |
| 15 | Sculptor Capital#15 · 2,480,000 sh | 2,480,000 | $5.7M | 0.05% | 0.0% |
| 16 | MOORE CAPITAL MANAGEMENT#16 · 1,000,000 sh | 1,000,000 | $5.3M | 0.08% | 0.0% |
| 17 | HBK INVESTMENTS L P#17 · 999,998 sh | 999,998 | $5.3M | 0.05% | 0.0% |
| 18 | Governors Lane#18 · 500,000 sh | 500,000 | $5.2M | 0.44% | +100.0% |
| 19 | GOLDMAN SACHS GROUP#19 · 462,806 sh | 462,806 | $4.9M | <0.01% | 0.0% |
| 20 | PERISCOPE CAPITAL#20 · 610,000 sh | 610,000 | $4.5M | 0.39% | +10.9% |
| 21 | LMR Partners LLP#21 · 400,000 sh | 400,000 | $4.3M | 0.02% | 0.0% |
| 22 | COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS#22 · 762,284 sh | 762,284 | $4.2M | 0.02% | 0.0% |
| 23 | BERKLEY W R#23 · 396,960 sh | 396,960 | $4.2M | 0.20% | -12.5% |
| 24 | TORONTO DOMINION BANK#24 · 917,343 sh | 917,343 | $4.0M | <0.01% | +11.2% |
| 25 | First Capital Management L.P.#25 · 380,000 sh | 380,000 | $4.0M | 0.23% | 0.0% |
| 26 | Shaolin Capital Management#26 · 856,196 sh | 856,196 | $3.8M | 0.18% | -18.5% |
| 27 | MANGROVE PARTNERS IM#27 · 356,172 sh | 356,172 | $3.7M | 0.25% | 0.0% |
| 28 | RIVERNORTH CAPITAL MANAGEMENT#28 · 597,372 sh | 597,372 | $3.2M | 0.15% | 0.0% |
| 29 | Verition Fund Management#29 · 351,460 sh | 351,460 | $2.7M | <0.01% | -22.3% |
| 30 | Quarry#30 · 252,236 sh | 252,236 | $2.6M | 0.22% | +19.8% |
| 31 | RLH Capital#31 · 252,236 sh | 252,236 | $2.6M | 1.27% | -40.1% |
| 32 | Schonfeld Strategic Advisors#32 · 409,360 sh | 409,360 | $2.6M | <0.01% | 0.0% |
| 33 | MILLENNIUM MANAGEMENT#33 · 900,000 sh | 900,000 | $2.2M | <0.01% | 0.0% |
| 34 | Jain Global#34 · 202,091 sh | 202,091 | $2.1M | <0.01% | -44.9% |
| 35 | GRITSTONE ASSET MANAGEMENT#35 · 395,311 sh | 395,311 | $2.1M | — | 0.0% |
| 36 | MIZUHO SECURITIES USA#36 · 200,392 sh | 200,392 | $2.1M | 0.02% | +100.0% |
| 37 | HIGHBRIDGE CAPITAL MANAGEMENT#37 · 177,898 sh | 177,898 | $1.9M | 0.05% | New |
| 38 | SONA ASSET MANAGEMENT (US)#38 · 172,874 sh | 172,874 | $1.8M | 0.04% | 0.0% |
| 39 | O'Connor Alternative Investments#39 · 160,000 sh | 160,000 | $1.7M | 0.12% | 0.0% |
| 40 | DLD Asset Management#40 · 247,607 sh | 247,607 | $1.5M | 0.10% | 0.0% |
| 41 | METEORA CAPITAL#41 · 668,875 sh | 668,875 | $1.3M | 0.10% | 0.0% |
| 42 | Centiva Capital#42 · 200,000 sh | 200,000 | $1.1M | <0.01% | 0.0% |
| 43 | Clear Street Group#43 · 313,402 sh | 313,402 | $986.5K | <0.01% | -0.9% |
| 44 | L1 Global Manager Pty Ltd#44 · 75,000 sh | 75,000 | $786.8K | 0.56% | 0.0% |
| 45 | BNP PARIBAS FINANCIAL MARKETS#45 · 518,017 sh | 518,017 | $675.9K | <0.01% | 0.0% |
| 46 | BOOTHBAY FUND MANAGEMENT#46 · 170,669 sh | 170,669 | $501.7K | <0.01% | 0.0% |
| 47 | PenderFund Capital Management Ltd.#47 · 32,500 sh | 32,500 | $340.6K | 0.04% | New |
| 48 | Harraden Circle Investments#48 · 1,341,436 sh | 1,341,436 | $281.7K | 0.04% | 0.0% |
| 49 | ABC ARBITRAGE SA#49 · 20,000 sh | 20,000 | $209.8K | — | 0.0% |
| 50 | WOLVERINE ASSET MANAGEMENT#50 · 12,760 sh | 12,760 | $133.9K | <0.01% | -23.3% |
| 51 | Alpine Global Management#51 · 324,602 sh | 324,602 | $68.2K | 0.01% | 0.0% |
| 52 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#52 · 187,011 sh | 187,011 | $39.3K | 0.00% | New |
| 53 | K2 PRINCIPAL FUND, L.P.#53 · 112,006 sh | 112,006 | $23.5K | <0.01% | 0.0% |
| 54 | FNY Investment Advisers#54 · 112 sh | 112 | $1.0K | — | 0.0% |
| 55 | UBS Group AG#55 · 69 sh | 69 | $737.00 | 0.00% | -1.4% |
| 56 | MORGAN STANLEY#56 · 51 sh | 51 | $535.00 | 0.00% | -28.2% |
| 57 | Context Capital Management#57 · 274,382 sh | 274,382 | — | — | 0.0% |
Funds that sold out of AACB in Q2 2026 (3)
Held AACB at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| Fort Baker Capital Management232,736 sh | 232,736 | $2.4M |
| Crossingbridge Advisors25,000 sh | 25,000 | $258.5K |
| Virtu Financial18,464 sh | 18,464 | $191.0K |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.