Vault-13

ART TECHNOLOGY ACQUISITION C ARTC

USD CL A ORD SHS · Common Stock · CUSIP G0579E103

46 institutional holders +9 vs Q1 2026
21,282,17721.3m shares reported held*
$211.4mreported value*
11 new 7 added 8 reduced 2 sold out net bought ≈ $25.7m (+2.6m 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 ≈ $9.93.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0204060Q1 26: 37Q2 26: 4646Q1 26Q2 26
Numbers
QuarterHolders
Q1 202637
Q2 202646

Biggest buyers

Karpus Management, Inc. New +973,200+973.2k
WOLVERINE ASSET MANAGEMENT LLC Added +828,206+828.2k
MILLENNIUM MANAGEMENT LLC New +600,000+600.0k
CSS LLC/IL Added +396,263+396.3k
MMCAP International Inc. SPC New +352,300+352.3k
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS New +300,000+300.0k
PICTON MAHONEY ASSET MANAGEMENT New +199,996+200.0k
Schonfeld Strategic Advisors LLC Added +139,880+139.9k
RLH Capital LLC New +100,000+100.0k
Radcliffe Capital Management, L.P. Added +79,242+79.2k

Biggest sellers

Shaolin Capital Management LLC Reduced -519,476-519.5k
Clear Street Group Inc. Reduced -467,116-467.1k
Parallax Volatility Advisers, L.P. Reduced -237,197-237.2k
Meteora Capital, LLC Reduced -231,345-231.3k
BOOTHBAY FUND MANAGEMENT, LLC Reduced -150,000-150.0k
Virtu Financial LLC Sold out -26,607-26.6k
CITADEL ADVISORS LLC Sold out -10,815-10.8k
ABC ARBITRAGE SA Reduced -5,000-5.0k
Kepos Capital LP Reduced -900-900
GLAZER CAPITAL, LLC Reduced -17-17

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
Art Technology Sponsor, LLC 13D · may seek influence new · filed 2026-01-08
Stated purposeOn August 27, 2025, Sponsor paid certain offering costs totaling $25,000. In August 2025, Issuer entered into a share subscription agreement with Sponsor resulting in Sponsor holding 8,650,000 Class B Shares. In September 2025, the Issuer issued an additional 50,000 founder shares to Sponsor, for a total of 8,700,000 founder shares outstanding. In October 2025, the Issuer issued an additional 8,333 founder shares to Sponsor, for a total of 8,708,333 founder shares outstanding. On January 5, 2026, Sponsor transferred to Advisors 5,858,333 Class B Shares. On January 7, 2026, in connection with the consummation of the IPO, Sponsor forfeited 100,000 Class B Shares. On January 5, 2026, simultaneously with the consummation of the IPO, Sponsor purchased 530,000 units ("Placement Units") of the I… Full filing
 29.0% new 9.1m≈ $90.7m 2026-01-08
HIGHBRIDGE CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-05-15 5.7% new 1.5m≈ $14.9m 2026-05-15
Polar Asset Management Partners Inc. 13G · institution new · filed 2026-05-15 5.7% new 1.5m≈ $14.9m 2026-05-15
ARISTEIA CAPITAL, L.L.C. 13G · institution new · filed 2026-05-14 5.5% new 1.4m≈ $14.3m 2026-05-14

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

None reported since 1 Apr 2026.

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Linden Advisors LP 0.08% of their portfolio New York, NY 1,600,0001.6m $15.9m $15.9m 0.08% Unchanged
2 Polar Asset Management Partners Inc. 0.28% of their portfolio TORONTO, A6 1,543,4361.5m $15.3m $15.3m 0.28% Added +43.4k +43,436
3 HIGHBRIDGE CAPITAL MANAGEMENT LLC 0.51% of their portfolio NEW YORK, NY 1,500,0001.5m $14.9m $14.9m 0.51% Unchanged
4 TENOR CAPITAL MANAGEMENT Co., L.P. 0.21% of their portfolio NEW YORK, NY 1,500,0001.5m $14.9m $14.9m 0.21% Unchanged
5 ARISTEIA CAPITAL, L.L.C. 0.22% of their portfolio GREENWICH, CT 1,435,7171.4m $14.3m $14.3m 0.22% Unchanged
6 AQR Arbitrage LLC 0.15% of their portfolio Greenwich, CT 1,045,6081.0m $10.4m $10.4m 0.15% Unchanged
7 Magnetar Financial LLC 0.09% of their portfolio EVANSTON, IL 1,000,0001.0m $9.9m $9.9m 0.09% Unchanged
8 Mint Tower Capital Management B.V. 1.17% of their portfolio AMSTERDAM, P7 1,000,0001.0m $9.9m $9.9m 1.17% Unchanged
9 Karpus Management, Inc. 0.28% of their portfolio Pittsford, NY 973,200973.2k $9.7m $9.7m 0.28% New
10 WOLVERINE ASSET MANAGEMENT LLC 0.11% of their portfolio CHICAGO, IL 836,573836.6k $8.3m $8.3m 0.11% Added +828.2k +828,206
11 Meteora Capital, LLC 0.67% of their portfolio Boca Raton, FL 818,655818.7k $8.1m $8.1m 0.67% Reduced -231.3k -231,345
12 Alberta Investment Management Corp 0.04% of their portfolio EDMONTON, A0 750,000750.0k $7.5m $7.5m 0.04% Unchanged
13 SONA ASSET MANAGEMENT (US) LLC 0.28% of their portfolio NEW YORK, NY 750,000750.0k $7.4m $7.4m 0.28% Unchanged
14 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 604,376604.4k $6.0m $6.0m 0.00% Unchanged
15 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 600,000600.0k $6.0m $6.0m 0.00% New
16 Periscope Capital Inc. 0.92% of their portfolio Toronto, A6 584,900584.9k $5.8m $5.8m 0.92% Unchanged
17 CSS LLC/IL 0.21% of their portfolio CHICAGO, IL 487,763487.8k $4.8m $4.8m 0.21% Added +396.3k +396,263
18 GLAZER CAPITAL, LLC 0.11% of their portfolio New York, NY 449,983450.0k $4.5m $4.5m 0.11% Reduced -17 -17
19 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 398,750398.8k $4.0m $4.0m 0.00% Unchanged
20 Shaolin Capital Management LLC 0.22% of their portfolio Miami, FL 390,524390.5k $3.9m $3.9m 0.22% Reduced -519.5k -519,476
21 MMCAP International Inc. SPC 0.30% of their portfolio GRAND CAYMAN, E9 352,300352.3k $3.5m $3.5m 0.30% New
22 COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.01% of their portfolio HARRISBURG, PA 300,000300.0k $3.0m $3.0m 0.01% New
23 BERKLEY W R CORP 0.12% of their portfolio Greenwich, CT 247,924247.9k $2.5m $2.5m 0.12% Unchanged
24 Radcliffe Capital Management, L.P. 0.16% of their portfolio BALA CYNWYD, PA 213,494213.5k $2.1m $2.1m 0.16% Added +79.2k +79,242
25 Clear Street Group Inc. 0.01% of their portfolio NEW YORK, NY 212,448212.4k $2.1m $2.1m 0.01% Reduced -467.1k -467,116
26 Schonfeld Strategic Advisors LLC 0.01% of their portfolio NEW YORK, NY 200,000200.0k $2.0m $2.0m 0.01% Added +139.9k +139,880
27 PICTON MAHONEY ASSET MANAGEMENT 0.02% of their portfolio Toronto, A6 199,996200.0k $2.0m $2.0m 0.02% New
28 Hudson Bay Capital Management LP 0.01% of their portfolio STAMFORD, CT 184,872184.9k $1.8m $1.8m 0.01% Unchanged
29 WHITEBOX ADVISORS LLC 0.02% of their portfolio MINNEAPOLIS, MN 126,066126.1k $1.3m $1.3m 0.02% Unchanged
30 Parallax Volatility Advisers, L.P. 0.04% of their portfolio San Francisco, CA 102,790102.8k $1.0m $1.0m 0.04% Reduced -237.2k -237,197
31 RIVERNORTH CAPITAL MANAGEMENT, LLC 0.05% of their portfolio WEST PALM BEACH, FL 100,000100.0k $996.5k $996.5k 0.05% Unchanged
32 Ghisallo Capital Management LLC 0.02% of their portfolio BOSTON, MA 100,000100.0k $994.0k $994.0k 0.02% Unchanged
33 RLH Capital LLC 0.48% of their portfolio Great Neck, NY 100,000100.0k $993.0k $993.0k 0.48% New
34 Logan Stone Capital, LLC 0.16% of their portfolio CHICAGO, IL 74,99675.0k $744.7k $744.7k 0.16% Unchanged
35 First Trust Capital Management L.P. 0.04% of their portfolio CHICAGO, IL 65,94065.9k $654.8k $654.8k 0.04% Unchanged
36 K2 PRINCIPAL FUND, L.P. 0.05% of their portfolio TORONTO, A6 54,30054.3k $539.2k $539.2k 0.05% Added +4.3k +4,300
37 Alyeska Investment Group, L.P. 0.00% of their portfolio CHICAGO, IL 50,00050.0k $501.5k $501.5k 0.00% New
38 Bulldog Investors, LLP 0.11% of their portfolio SADDLE BROOK, NJ 50,00050.0k $496.5k $496.5k 0.11% New
39 Warberg Asset Management LLC 0.15% of their portfolio WINNETKA, IL 50,00050.0k $496.5k $496.5k 0.15% Unchanged
40 Quarry LP 0.08% of their portfolio NEW YORK, NY 50,00050.0k $496.5k $496.5k 0.08% New
41 Stoic Point Capital Management LLC 0.42% of their portfolio PALO ALTO, CA 50,00050.0k $501.5k $501.5k 0.42% New
42 BOOTHBAY FUND MANAGEMENT, LLC 0.01% of their portfolio NEW YORK, NY 46,88346.9k $465.5k $465.5k 0.01% Reduced -150.0k -150,000
43 ABC ARBITRAGE SA 0.04% of their portfolio PARIS, I0 35,00035.0k $347.6k $347.6k 0.04% Reduced -5.0k -5,000
44 Kepos Capital LP 0.33% of their portfolio NEW YORK, NY 24,10024.1k $239.0k $239.0k 0.33% Reduced -900 -900
45 Tuttle Capital Management, LLC 0.14% of their portfolio RIVERSIDE, CT 21,53821.5k $214.1k $214.1k 0.14% New
46 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 4545 $447 $447 0.00% Added +33 +33