Who owns Armada Acquisition Corp. III (AACI)
Which tracked institutional funds hold AACI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AACI company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-17). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
11 tracked funds added or opened AACI while 9 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
AACI’s largest tracked holder by dollar value, TENOR CAPITAL MANAGEMENT Co., L.P., sizes it at 1.5% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 1.4pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in AACI divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 50 tracked filers holding AACI, 16 increased or opened the position and 19 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in AACI between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 6
- Context Capital Management, LLC$4M
- COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS$4M
- D. E. Shaw & Co., Inc.$1M
- Logan Stone Capital, LLC$1M
- StoneX Group Inc.$968K
- ROYAL BANK OF CANADA$545K
Full exits 6
- TENOR CAPITAL MANAGEMENT Co., L.P.$112M
- METEORA CAPITAL, LLC$48M
- GLAZER CAPITAL, LLC$5M
- Kepos Capital LP$1M
- Mint Tower Capital Management B.V.$1M
- Virtu Financial LLC$589K
Largest adds
- WOLVERINE ASSET MANAGEMENT LLC$5M
- HIGHBRIDGE CAPITAL MANAGEMENT LLC$2M
- Clear Street Group Inc.$705K
- ADAGE CAPITAL PARTNERS GP, L.L.C.$294K
- PenderFund Capital Management Ltd.$256K
Largest trims
- RK Capital Management, LLC/FL$5M
- Saba Capital Management, L.P.$2M
- Shaolin Capital Management LLC$331K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 2,025,000 | $20M | 5.3% | 2026-Q2 |
| ARISTEIA CAPITAL, L.L.C. added | 1,657,146 | $17M | 4.4% | 2026-Q2 |
| Linden Advisors LP | 1,400,000 | $14M | 3.7% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 1,100,000 | $11M | 2.9% | 2026-Q2 |
| WOLVERINE ASSET MANAGEMENT LLC added | 1,019,872 | $10M | 2.7% | 2026-Q2 |
| LMR Partners LLP | 1,000,000 | $10M | 2.7% | 2026-Q2 |
| Magnetar Financial LLC | 1,000,000 | $10M | 2.6% | 2026-Q2 |
| Polar Asset Management Partners Inc. | 900,000 | $9M | 2.4% | 2026-Q2 |
| Hudson Bay Capital Management LP | 900,000 | $9M | 2.4% | 2026-Q2 |
| AQR Arbitrage LLC trimmed | 739,995 | $7M | 1.9% | 2026-Q2 |
| Alberta Investment Management Corp | 700,000 | $7M | 1.8% | 2026-Q2 |
| SONA ASSET MANAGEMENT (US) LLC | 650,000 | $6M | 1.7% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC | 612,000 | $6M | 1.6% | 2026-Q2 |
| WHITEBOX ADVISORS LLC | 550,000 | $5M | 1.4% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS | 537,680 | $5M | 1.4% | 2026-Q2 |
| CSS LLC/IL trimmed | 499,959 | $5M | 1.3% | 2026-Q2 |
| OMERS ADMINISTRATION Corp | 450,000 | $5M | 1.2% | 2026-Q2 |
| Radcliffe Capital Management, L.P. added | 426,213 | $4M | 1.1% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 417,507 | $4M | 1.1% | 2026-Q2 |
| Crossingbridge Advisors, LLC | 400,000 | $4M | 1.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP | 407,812 | $4M | 1.1% | 2026-Q2 |
| Context Capital Management, LLC new | 400,000 | $4M | 1.1% | 2026-Q2 |
| HEIGHTS CAPITAL MANAGEMENT, INC | 365,000 | $4M | 1.0% | 2026-Q2 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS new | 350,000 | $3M | 0.9% | 2026-Q2 |
| Kryger Capital LLC trimmed | 346,214 | $3M | 0.9% | 2026-Q2 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 320,798 | $3M | 0.8% | 2026-Q2 |
| Periscope Capital Inc. trimmed | 299,800 | $3M | 0.8% | 2026-Q2 |
| Verition Fund Management LLC | 300,100 | $3M | 0.8% | 2026-Q2 |
| Wealthspring Capital LLC | 229,040 | $2M | 0.6% | 2026-Q2 |
| Clear Street Group Inc. added | 204,896 | $2M | 0.5% | 2026-Q2 |
| READYSTATE ASSET MANAGEMENT LP | 200,000 | $2M | 0.5% | 2026-Q2 |
| Cable Car Capital, LP | 200,000 | $2M | 0.5% | 2026-Q2 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC added | 199,544 | $2M | 0.5% | 2026-Q2 |
| BERKLEY W R CORP | 198,800 | $2M | 0.5% | 2026-Q2 |
| Shaolin Capital Management LLC trimmed | 162,341 | $2M | 0.4% | 2026-Q2 |
| DLD Asset Management, LP | 150,000 | $1M | 0.4% | 2026-Q2 |
| D. E. Shaw & Co., Inc. new | 133,072 | $1M | 0.3% | 2026-Q2 |
| Logan Stone Capital, LLC new | 129,135 | $1M | 0.3% | 2026-Q2 |
| Lineage Point Capital LP trimmed | 121,400 | $1M | 0.3% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT trimmed | 124,998 | $1M | 0.3% | 2026-Q2 |
| StoneX Group Inc. new | 96,427 | $959K | 0.3% | 2026-Q2 |
| ROYAL BANK OF CANADA new | 54,047 | $540K | 0.1% | 2026-Q2 |
| ABC ARBITRAGE SA | 40,000 | $400K | 0.1% | 2026-Q2 |
| PenderFund Capital Management Ltd. added | 33,900 | $337K | 0.1% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 17,664 | $176K | 0.0% | 2026-Q2 |
| TORONTO DOMINION BANK new | 10,000 | $100K | 0.0% | 2026-Q2 |
| RK Capital Management, LLC/FL trimmed | 268,996 | $85K | 0.0% | 2026-Q2 |
| Saba Capital Management, L.P. trimmed | 99,557 | $32K | 0.0% | 2026-Q2 |
| MORGAN STANLEY added | 45 | $450 | 0.0% | 2026-Q2 |
| HARBOUR INVESTMENTS, INC. new | 3 | $30 | 0.0% | 2026-Q2 |
| TENOR CAPITAL MANAGEMENT Co., L.P. new | 350,000 | $105M | 27.7% | 2026-Q1 stale (1 quarter behind) |
| METEORA CAPITAL, LLC new | 149,999 | $45M | 11.9% | 2026-Q1 stale (1 quarter behind) |
| GLAZER CAPITAL, LLC new | 476,113 | $5M | 1.3% | 2026-Q1 stale (1 quarter behind) |
| Kepos Capital LP new | 150,000 | $1M | 0.4% | 2026-Q1 stale (1 quarter behind) |
| Mint Tower Capital Management B.V. new | 100,000 | $986K | 0.3% | 2026-Q1 stale (1 quarter behind) |
| Virtu Financial LLC new | 58,956 | $589K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| JPMORGAN CHASE & CO new | 27,303 | $270K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| Warberg Asset Management LLC new | 10,000 | $100K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| UBS Group AG new | 10 | $2 | 0.0% | 2026-Q1 stale (1 quarter behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.