ATII · Archimedes Tech SPAC Partners II Co.
$10.71
-0.03 (-0.28%)
At close · Jul 17
Going-concern doubt
— flagged May 14, 2026
Substantial doubt about the company's ability to continue as a going concern.
“The date for mandatory liquidation and subsequent dissolution raises substantial doubt about the Company's ability to continue as a going concern. Management plans to consummate an initial business combination prior to the mandatory liquidation date.”View the 10-Q filed May 14, 2026
Market Cap
$316.91M
Shares
29,590,000
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
The Jun 30, 2026 filing window is
still open — showing the latest known positions. Funds that have not filed yet
carry their prior-quarter positions; a fund that filed without this stock counts
as sold out.
Holders: 54
Total Value: $230,316,752
Total Shares: 22,112,940
Institutional Ownership Trend
5 quarters
Holder Concentration
Across 54 13F filersTop Holder
6.8%
of institutional value
Top 5
26.4%
of institutional value
Top 10
44.7%
of institutional value
HHI
320
Broadly held
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mid TENOR CAPITAL MANAGEMENT Co., L.P. | $15,615,000 | 6.78% | 1,500,000 | Shares | Sole | 2026-05-15 | ||||
| Mid Magnetar Financial LLC | $13,533,000 | 5.88% | 1,300,000 | Shares | Sole | 2026-05-13 | ||||
| Mega D. E. Shaw & Co., Inc. | $11,851,785 | 5.15% | 1,138,500 | Shares | Defined | 2026-05-15 | ||||
| Mid Linden Advisors LP | $10,410,000 | 4.52% | 1,000,000 | Shares | Sole | 2026-05-15 | ||||
| Mid AQR Arbitrage LLC | $9,584,195 | 4.16% | 920,672 | Shares | Defined | 2026-05-15 | ||||
| Mid Westchester Capital Management, LLC | $9,443,367 | 4.10% | 907,144 | Shares | Other | 2026-05-15 | ||||
| Large LMR Partners LLP | $8,848,500 | 3.84% | 850,000 | Shares | Sole | 2026-05-15 | ||||
| Mid Ghisallo Capital Management LLC | $8,328,000 | 3.62% | 800,000 | Shares | Sole | 2026-05-15 | ||||
| Mid Governors Lane LP | $7,906,977 | 3.43% | 759,556 | Shares | Sole | 2026-05-15 | ||||
| Mid GLAZER CAPITAL, LLC | $7,807,500 | 3.39% | 750,000 | Shares | Sole | 2026-05-14 | ||||
| Mid Alberta Investment Management Corp | $7,807,500 | 3.39% | 750,000 | Shares | Sole | 2026-04-29 | ||||
| Mega TWO SIGMA INVESTMENTS, LP | $7,547,250 | 3.28% | 725,000 | Shares | Sole | 2026-05-15 | ||||
| Large Hudson Bay Capital Management LP | $7,287,000 | 3.16% | 700,000 | Shares | Sole | 2026-05-13 | ||||
| Small Radcliffe Capital Management, L.P. | $6,884,518 | 2.99% | 661,337 | Shares | Sole | 2026-05-15 | ||||
| Large TORONTO DOMINION BANK Bank | $6,766,500 | 2.94% | 650,000 | Shares | Defined | 2026-05-15 | ||||
| Mid Sculptor Capital LP | $6,252,724 | 2.71% | 600,646 | Shares | Defined | 2026-05-15 | ||||
| Mid PICTON MAHONEY ASSET MANAGEMENT | $5,205,000 | 2.26% | 500,000 | Shares | Sole | 2026-05-13 | ||||
| Large Jain Global LLC | $5,205,000 | 2.26% | 500,000 | Shares | Sole | 2026-05-15 | ||||
| Mid MOORE CAPITAL MANAGEMENT, LP | $4,684,500 | 2.03% | 450,000 | Shares | Sole | 2026-05-15 | ||||
| Mid RIVERNORTH CAPITAL MANAGEMENT, LLC | $4,450,275 | 1.93% | 427,500 | Shares | Sole | 2026-05-15 | ||||
| Small RLH Capital LLC | $4,173,441 | 1.81% | 400,907 | Shares | Defined | 2026-04-29 | ||||
| Mid J. Goldman & Co LP | $3,849,388 | 1.67% | 369,778 | Shares | Sole | 2026-05-15 | ||||
| Small Periscope Capital Inc. | $3,673,480 | 1.59% | 352,880 | Shares | Sole | 2026-05-14 | ||||
| Small FNY Investment Advisers, LLC | $3,527,216 | 1.53% | 327,200 | Shares | Sole | 2026-07-08 | ||||
| Mega GOLDMAN SACHS GROUP INC | $3,408,754 | 1.48% | 327,450 | Shares | Defined | 2026-05-15 | ||||
| Mega MILLENNIUM MANAGEMENT LLC | $3,206,123 | 1.39% | 307,985 | Shares | Sole | 2026-05-15 | ||||
| Small Mint Tower Capital Management B.V. | $3,123,000 | 1.36% | 300,000 | Shares | Sole | 2026-05-04 | ||||
| Mid METEORA CAPITAL, LLC | $3,077,320 | 1.34% | 295,612 | Shares | Defined | 2026-05-15 | ||||
| Large Centiva Capital, LP | $2,972,211 | 1.29% | 285,515 | Shares | Sole | 2026-05-14 | ||||
| Small Quarry LP | $2,966,850 | 1.29% | 285,000 | Shares | Other | 2026-05-15 | ||||
| Mid Shaolin Capital Management LLC | $2,818,851 | 1.22% | 270,783 | Shares | Sole | 2026-05-15 | ||||
| Mid ARISTEIA CAPITAL, L.L.C. | $2,602,500 | 1.13% | 250,000 | Shares | Sole | 2026-05-15 | ||||
| Mid WHITEBOX ADVISORS LLC | $2,602,500 | 1.13% | 250,000 | Shares | Sole | 2026-05-15 | ||||
| Large Verition Fund Management LLC | $2,409,602 | 1.05% | 231,470 | Shares | Sole | 2026-05-15 | ||||
| Mid BERKLEY W R CORP | $2,165,956 | 0.94% | 208,065 | Shares | Sole | 2026-05-15 | ||||
| Small L1 Global Manager Pty Ltd | $2,082,000 | 0.90% | 200,000 | Shares | Sole | 2026-05-15 | ||||
| Mid O'Connor Alternative Investments LLC | $2,082,000 | 0.90% | 200,000 | Shares | Defined | 2026-05-15 | ||||
| Large Schonfeld Strategic Advisors LLC | $1,806,291 | 0.78% | 173,515 | Shares | Sole | 2026-05-15 | ||||
| Small DLD Asset Management, LP | $1,561,500 | 0.68% | 150,000 | Shares | Sole | 2026-05-13 | ||||
| Mid READYSTATE ASSET MANAGEMENT LP | $1,548,320 | 0.67% | 148,734 | Shares | Sole | 2026-05-15 | ||||
| Mid WOLVERINE ASSET MANAGEMENT LLC | $1,397,854 | 0.61% | 134,280 | Shares | Defined | 2026-05-04 | ||||
| Small MMCAP International Inc. SPC | $1,301,250 | 0.56% | 125,000 | Shares | Sole | 2026-05-15 | ||||
| Micro GRITSTONE ASSET MANAGEMENT LLC | $1,031,433 | 0.45% | 99,081 | Shares | Sole | 2026-05-05 | ||||
| Small Lineage Point Capital LP | $998,266 | 0.43% | 95,895 | Shares | Sole | 2026-05-15 | ||||
| Small K2 PRINCIPAL FUND, L.P. | $915,039 | 0.40% | 87,900 | Shares | Sole | 2026-05-14 | ||||
| Large Baird Financial Group, Inc. | $817,185 | 0.35% | 78,500 | Shares | Defined | 2026-05-14 | ||||
| Large Clear Street Group Inc. | $806,275 | 0.35% | 77,452 | Shares | Sole | 2026-05-15 | ||||
| Small CSS LLC/IL | $594,858 | 0.26% | 57,143 | Shares | Sole | 2026-05-15 | ||||
| Mid Virtu Financial LLC | $558,871 | 0.24% | 53,686 | Shares | Defined | 2026-05-14 | ||||
| Mega BNP PARIBAS ARBITRAGE, SA | $392,915 | 0.17% | 37,744 | Shares | Defined | 2026-05-12 | ||||
| Mid MIZUHO SECURITIES USA LLC Broker-Dealer | $202,672 | 0.09% | 19,469 | Shares | Defined | 2026-05-11 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $115,571 | 0.05% | 11,102 | Shares | Defined | 2026-05-15 | ||||
| Mega CITADEL ADVISORS LLC | $108,024 | 0.05% | 10,377 | Shares | Defined | 2026-05-15 | ||||
| Mega MORGAN STANLEY | $645 | 0.00% | 62 | Shares | Defined | 2026-05-15 | ||||
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