ATIIU · Archimedes Tech SPAC Partners II Co. · Holdings
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
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.
Institutional Ownership Trend
Holder Concentration
Across 4 13F filersWho Holds ATIIU
Last 6 quarters through Jun 30, 2026Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026: 4 filers, like-for-like change +1.8%; actively managed books +1.8%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 0.0% | 0 | -100.0% |
| Bank | 46.3% | 2 | -2.2% |
| Exempt adviser | 0.0% | 0 | — |
| Adviser | 0.0% | 0 | — |
| Insurer | 0.0% | 0 | — |
| Broker-dealer | 0.0% | 0 | — |
| Non-US | 0.0% | 0 | — |
| Unknown | 53.7% | 2 | +5.6% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Concentrated | 12.8% | 1 | +41.6% |
| Diversified active | 87.2% | 3 | -2.2% |
| Systematic-like | 0.0% | 0 | — |
| Index-like | 0.0% | 0 | — |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 44.4% | 1 | -2.0% |
| Medium turnover | 1.9% | 1 | -7.6% |
| High turnover | 40.8% | 1 | -2.2% |
| Unknown | 12.8% | 1 | +41.6% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 12.8% | 1 | +41.6% |
| Long horizon | 87.2% | 3 | -2.2% |
| Medium horizon | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| $1B to $10B | 0.0% | 0 | -100.0% |
| $10B to $100B | 12.8% | 1 | +41.6% |
| $100B or more | 87.2% | 3 | -2.2% |
| Under $1B | 0.0% | 0 | — |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Pooled investment vehicles | 0.0% | 0 | -100.0% |
| Registered funds and BDCs | 0.0% | 0 | — |
| Charitable organizations | 0.0% | 0 | — |
| Other investment advisers | 0.0% | 0 | — |
| Unknown | 100.0% | 4 | +1.8% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 0.0% | 0 | -100.0% |
| No private funds | 0.0% | 0 | — |
| Private equity funds | 0.0% | 0 | — |
| Private funds, type not stated | 0.0% | 0 | — |
| Unknown | 100.0% | 4 | +1.8% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 98.1% | 3 | +2.0% |
| Outside the US | 1.9% | 1 | -7.5% |
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Conviction and Crowding
4 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 85.2% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies ATIIU's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | NHIC NewHold Investment Corp. III | 3 |
| 2 | VLOS Velos Acquisition I Corp. | 3 |
| 3 | ALDF Aldel Financial II Inc. | 3 |
| 4 | NTWO Newbury Street II Acquisition Corp | 4 |
| 5 | TVA Texas Ventures Acquisition III Corp | 3 |
| 6 | CLBR Colombier Acquisition Corp. III | 4 |
| 7 | POLE Andretti Acquisition Corp. II | 3 |
| 8 | CCII Cohen Circle Acquisition Corp. II | 4 |
| 9 | CEPV Cantor Equity Partners V, Inc. | 4 |
| 10 | NWAX New America Acquisition I Corp. | 3 |
Shareholder Targets
13F filers that own its peers but not ATIIU, quarter ended Jun 30, 2026Found through its holder-overlap peers: NHIC, VLOS, ALDF, NTWO, TVA, CLBR, POLE, CCII, CEPV, NWAX, BBCQ, RTAC, RNGT, EVAC, CEPF, RVMD, GEV, META, NVDA, AMZN. 6,802 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | BlackRock, Inc. Holding company, Index-like | $692,740,308,982 5 held | NVDA, AMZN, META |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC Registered adviser, Index-like | $562,952,114,168 5 held | NVDA, AMZN, META |
| 3 | FMR LLC Holding company, Diversified active | $367,730,729,303 5 held | NVDA, AMZN, META |
| 4 | STATE STREET CORP Bank, Index-like | $363,294,665,559 5 held | NVDA, AMZN, META |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active | $161,324,908,318 5 held | NVDA, AMZN, META |
| 6 | Invesco Ltd. Adviser, Diversified active | $125,016,419,143 5 held | NVDA, AMZN, META |
| 7 | NORGES BANK Non-US, Index-like | $121,578,016,535 5 held | NVDA, AMZN, META |
| 8 | PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser, Diversified active | $120,940,320,874 5 held | NVDA, AMZN, META |
| 9 | Capital Research Global Investors Adviser, Diversified active | $91,646,444,910 4 held | NVDA, AMZN, META |
| 10 | NORTHERN TRUST CORP Bank, Index-like | $88,610,954,452 5 held | NVDA, AMZN, META |
Quarterly Activity
New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Large Clear Street Group Inc. | +4,164 | 14,164 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega JANE STREET GROUP, LLC | −1,011 | 45,049 | |
| Mega JPMORGAN CHASE & CO | −1,000 | 49,000 | |
| Mega UBS Group AG | −175 | 2,152 |
Top New Positions
vs Mar 31, 2026Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mid GLAZER CAPITAL, LLC | 1 | $0 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega JPMORGAN CHASE & CO Bank ATIIU | $587,510 | 44.40% | 49,000 | Shares | 2026-08-12 | |
| Mega JANE STREET GROUP, LLC ATIIU | $540,136 | 40.82% | 45,049 | Shares | 2026-08-14 | |
| Large Clear Street Group Inc. ATIIU | $169,826 | 12.83% | 14,164 | Shares | 2026-08-12 | |
| Mega UBS Group AG Bank ATIIU | $25,802 | 1.95% | 2,152 | Shares | 2026-08-13 |