ATII · Archimedes Tech SPAC Partners II Co.
$10.66
+0.01 (+0.09%)
At close · Sep 2
Going-concern doubt
— flagged Aug 13, 2026
Substantial doubt about the company's ability to continue as a going concern.
“In connection with the Company's assessment of going concern considerations in accordance with FASB ASC 2014-15, "Disclosures of Uncertainties about an Entity's Ability to Continue as a Going Concern," management has determined that the Company currently lacks the liquidity it needs to sustain operations for a reasonable period of time, which is considered to be at least one year from the date that the unaudited condensed consolidated financial statements are issued as it expects to continue to incur significant costs in pursuit of its acquisition plans. In addition, if the Company is unable to complete an initial business combination by November 12, 2026, then the Company will cease all operations except for the purpose of liquidating. The date for mandatory liquidation and subsequent dissolution and liquidity concerns raise 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. No adjustments have been made to the carrying amounts of assets or liabilities should the Company be required to liquidate after November 12, 2026.”View the 10-Q filed Aug 13, 2026
Market Cap
$315.43M
Shares
29.59M
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.
Holders: 60
Total Value: $189,157,740
Total Shares: 26,071,175
Institutional Ownership Trend
6 quarters
Holder Concentration
Across 60 13F filers · Δ vs Mar 31, 2026Top Holder
7.8%
+1.0 pts
Top 5
34.6%
+8.2 pts
Top 10
55.7%
+10.9 pts
HHI
425
Broadly held+105
Quarterly Activity
vs Mar 31, 2026
New
12
Increased
6
Decreased
30
Sold Out
12
Unchanged
12
Holder count:
0
Institutional value:
-18.1%
Shares held:
-20.5%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mid ARISTEIA CAPITAL, L.L.C. | +613,491 | 988,491 | |
| Small K2 PRINCIPAL FUND, L.P. | +479,150 | 806,945 | |
| Mega CITADEL ADVISORS LLC | +239,889 | 250,266 | |
| Mid Sculptor Capital LP | +102,173 | 702,819 | |
| Small DLD Asset Management, LP | +14,853 | 264,853 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Large TORONTO DOMINION BANK | −1,122,124 | 82,550 | |
| Mid GLAZER CAPITAL, LLC | −724,751 | 50,100 | |
| Small Shaolin Capital Management LLC | −512,972 | 257,811 | |
| Mid Linden Advisors LP | −508,551 | 1,352,411 | |
| Mid RIVERNORTH CAPITAL MANAGEMENT, LLC | −427,500 | 224,942 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mid Fort Baker Capital Management LP | 1,371,923 | $14,345,441 | |
| Small Decagon Asset Management LLP | 1,269,131 | $10,109,796 | |
| Mid Shay Capital LLC | 623,687 | $6,723,345 | |
| Small FNY Investment Advisers, LLC | 327,200 | $3,527,216 | |
| Large TUDOR INVESTMENT CORP ET AL | 123,842 | $1,335,016 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mid Westchester Capital Management, LLC | 1,107,143 | $9,443,367 | |
| Large PICTON MAHONEY ASSET MANAGEMENT | 625,000 | $5,205,000 | |
| Small RLH Capital LLC | 448,289 | $4,173,441 | |
| Large COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 400,000 | $4,164,000 | |
| Mid J. Goldman & Co LP | 369,778 | $3,849,388 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mid TENOR CAPITAL MANAGEMENT Co., L.P. | $14,745,207 | 7.80% | 1,367,830 | Shares | 2026-08-14 | |
| Mid Fort Baker Capital Management LP | $14,345,441 | 7.58% | 1,330,746 | Shares | 2026-08-14 | |
| Mid Magnetar Financial LLC | $13,984,915 | 7.39% | 1,297,302 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $12,273,030 | 6.49% | 1,138,500 | Shares | 2026-08-14 | |
| Small Decagon Asset Management LLP | $10,109,796 | 5.34% | 937,829 | Shares | 2026-08-14 | |
| Mid Linden Advisors LP | $9,144,382 | 4.83% | 848,273 | Shares | 2026-08-14 | |
| Mid Ghisallo Capital Management LLC | $8,624,000 | 4.56% | 800,000 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP | $7,815,500 | 4.13% | 725,000 | Shares | 2026-08-14 | |
| Large Hudson Bay Capital Management LP | $7,546,000 | 3.99% | 700,000 | Shares | 2026-08-14 | |
| Mid Shay Capital LLC | $6,723,345 | 3.55% | 623,687 | Shares | 2026-08-14 | |
| Mid Governors Lane LP | $6,520,358 | 3.45% | 604,857 | Shares | 2026-08-14 | |
| Mid AQR Arbitrage LLC | $6,363,024 | 3.36% | 590,262 | Shares | 2026-08-14 | |
| Mid Sculptor Capital LP | $5,957,232 | 3.15% | 552,619 | Shares | 2026-08-14 | |
| Small K2 PRINCIPAL FUND, L.P. | $5,672,727 | 3.00% | 526,227 | Shares | 2026-08-07 | |
| Large LMR Partners LLP | $5,163,382 | 2.73% | 478,978 | Shares | 2026-08-14 | |
| Small Radcliffe Capital Management, L.P. | $5,153,497 | 2.72% | 478,061 | Shares | 2026-08-14 | |
| Mid MOORE CAPITAL MANAGEMENT, LP | $4,851,000 | 2.56% | 450,000 | Shares | 2026-08-14 | |
| Mid Alberta Investment Management Corp | $4,312,000 | 2.28% | 400,000 | Shares | 2026-08-06 | |
| Small FNY Investment Advisers, LLC | $3,527,216 | 1.86% | 327,200 | Shares | 2026-07-08 | |
| Small Mint Tower Capital Management B.V. | $3,234,000 | 1.71% | 300,000 | Shares | 2026-08-18 | |
| Mega CITADEL ADVISORS LLC | $2,697,867 | 1.43% | 250,266 | Shares | 2026-09-02 | |
| Mid WHITEBOX ADVISORS LLC | $2,695,000 | 1.42% | 250,000 | Shares | 2026-08-14 | |
| Small Harraden Circle Investments, LLC | $2,529,645 | 1.34% | 234,661 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC | $2,210,870 | 1.17% | 205,090 | Shares | 2026-08-14 | |
| Micro L1 Global Manager Pty Ltd | $2,156,000 | 1.14% | 200,000 | Shares | 2026-08-13 | |
| Mid ARISTEIA CAPITAL, L.L.C. | $2,156,000 | 1.14% | 200,000 | Shares | 2026-08-14 | |
| Small DLD Asset Management, LP | $2,106,983 | 1.11% | 195,453 | Shares | 2026-08-13 | |
| Large Jain Global LLC | $1,995,464 | 1.05% | 185,108 | Shares | 2026-08-14 | |
| Small Periscope Capital Inc. | $1,886,500 | 1.00% | 175,000 | Shares | 2026-08-11 | |
| Large Verition Fund Management LLC | $1,517,791 | 0.80% | 140,797 | Shares | 2026-08-14 | |
| Mid MMCAP International Inc. SPC | $1,347,500 | 0.71% | 125,000 | Shares | 2026-08-14 | |
| Large TUDOR INVESTMENT CORP ET AL | $1,335,016 | 0.71% | 123,842 | Shares | 2026-08-14 | |
| Mid CANTOR FITZGERALD, L. P. | $951,690 | 0.50% | 88,283 | Shares | 2026-08-19 | |
| Large TORONTO DOMINION BANK Bank | $889,889 | 0.47% | 82,550 | Shares | 2026-08-14 | |
| Large Baird Financial Group, Inc. | $846,230 | 0.45% | 78,500 | Shares | 2026-08-12 | |
| Small Shaolin Capital Management LLC | $821,123 | 0.43% | 76,171 | Shares | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC | $747,959 | 0.40% | 69,384 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO ATIIU | $587,510 | 0.31% | 49,000 | Shares | 2026-08-12 | |
| Mega JANE STREET GROUP, LLC ATIIU | $540,136 | 0.29% | 45,049 | Shares | 2026-08-14 | |
| Mid GLAZER CAPITAL, LLC | $540,078 | 0.29% | 50,100 | Shares | 2026-08-17 | |
| Large Schonfeld Strategic Advisors LLC | $539,000 | 0.28% | 50,000 | Shares | 2026-08-14 | |
| Large HRT FINANCIAL LP | $508,708 | 0.27% | 47,190 | Shares | 2026-08-14 | |
| Large Clear Street Group Inc. | $269,500 | 0.14% | 25,000 | Shares | 2026-08-12 | |
| Mega BNP PARIBAS ARBITRAGE, SA | $256,456 | 0.14% | 23,790 | Shares | 2026-08-13 | |
| Mid MIZUHO SECURITIES USA LLC Broker-Dealer | $209,875 | 0.11% | 19,469 | Shares | 2026-07-24 | |
| Mid HIGHBRIDGE CAPITAL MANAGEMENT LLC | $188,617 | 0.10% | 17,497 | Shares | 2026-08-14 | |
| Large Clear Street Group Inc. ATIIU | $169,826 | 0.09% | 14,164 | Shares | 2026-08-12 | |
| Large READYSTATE ASSET MANAGEMENT LP | $135,051 | 0.07% | 12,528 | Shares | 2026-08-14 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | $119,679 | 0.06% | 11,102 | Shares | 2026-08-12 | |
| Mid EverSource Wealth Advisors, LLC | $91,630 | 0.05% | 8,500 | Shares | 2026-07-24 | |
| Mega UBS Group AG ATIIU | $25,802 | 0.01% | 2,152 | Shares | 2026-08-13 | |
| Mega UBS Group AG | $17,873 | 0.01% | 1,658 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY | $377 | 0.00% | 35 | Shares | 2026-08-13 | |
| Small Caitong International Asset Management Co., Ltd | $43 | 0.00% | 4 | Shares | 2026-08-05 | |
| Mid TENOR CAPITAL MANAGEMENT Co., L.P. ATIIW | — | — | 750,000 | Shares | 2026-08-14 | |
| Small Periscope Capital Inc. ATIIW | — | — | 40,000 | Shares | 2026-08-11 | |
| Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension ATIIW | — | — | 500,000 | Shares | 2026-08-13 | |
| Mid AQR Arbitrage LLC ATIIW | — | — | 481,366 | Shares | 2026-08-14 | |
| Mid MOORE CAPITAL MANAGEMENT, LP ATIIW | — | — | 225,000 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. ATIIW | — | — | 287,500 | Shares | 2026-08-14 | |
| Mid HIGHBRIDGE CAPITAL MANAGEMENT LLC ATIIW | — | — | 109 | Principal | 2026-08-14 | |
| Small K2 PRINCIPAL FUND, L.P. ATIIW | — | — | 280,718 | Shares | 2026-08-07 | |
| Small Lineage Point Capital LP ATIIW | — | — | 35,771 | Shares | 2026-08-14 | |
| Mid RIVERNORTH CAPITAL MANAGEMENT, LLC ATIIW | — | — | 224,942 | Shares | 2026-08-14 | |
| Mid Centiva Capital, LP ATIIW | — | — | 31,450 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP ATIIW | — | — | 48,825 | Shares | 2026-08-14 | |
| Small Thomas J. Herzfeld Advisors, Inc. ATIIW | — | — | 5,000 | Shares | 2026-08-10 | |
| Small Decagon Asset Management LLP ATIIW | — | — | 331,302 | Shares | 2026-08-14 | |
| Mid Alberta Investment Management Corp ATIIW | — | — | 375,000 | Shares | 2026-08-06 | |
| Small CSS LLC/IL ATIIW | — | — | 151,718 | Shares | 2026-08-14 | |
| Small Mint Tower Capital Management B.V. ATIIW | — | — | 130,000 | Shares | 2026-08-18 | |
| Small Alpine Global Management, LLC ATIIW | — | — | 71,039 | Shares | 2026-08-14 | |
| Mid Fort Baker Capital Management LP ATIIW | — | — | 41,177 | Shares | 2026-08-14 | |
| Small Harraden Circle Investments, LLC ATIIW | — | — | 1,131,600 | Shares | 2026-08-14 | |
| Mid MMCAP International Inc. SPC ATIIW | — | — | 62,500 | Shares | 2026-08-14 | |
| Large Hudson Bay Capital Management LP ATIIW | — | — | 39,994 | Shares | 2026-08-14 | |
| Mid Magnetar Financial LLC ATIIW | — | — | 437,600 | Shares | 2026-08-14 | |
| Mid WHITEBOX ADVISORS LLC ATIIW | — | — | 125,000 | Shares | 2026-08-14 | |
| Small DLD Asset Management, LP ATIIW | — | — | 69,400 | Shares | 2026-08-13 | |
| Large LMR Partners LLP ATIIW | — | — | 613,701 | Shares | 2026-08-14 | |
| Large Schonfeld Strategic Advisors LLC ATIIW | — | — | 30,000 | Shares | 2026-08-14 | |
| Mid Sculptor Capital LP ATIIW | — | — | 150,200 | Shares | 2026-08-14 | |
| Large Clear Street Group Inc. ATIIW | — | — | 60,000 | Shares | 2026-08-12 | |
| Small Shaolin Capital Management LLC ATIIW | — | — | 181,640 | Shares | 2026-08-14 | |
| Mid ARISTEIA CAPITAL, L.L.C. ATIIW | — | — | 788,491 | Shares | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC ATIIW | — | — | 169,353 | Call | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA ATIIW | — | — | 161,927 | Shares | 2026-08-13 | |
| Mid Linden Advisors LP ATIIW | — | — | 504,138 | Shares | 2026-08-14 |