Among active 13F managers last quarter, 5 opened and 3 added, while 1 reduced; the largest holder to move was Adage Capital Partners GP, L.L.C. (new position). No open-market insider trades in the last 180 days.
Funds lean in and no leg opposes.
20 tracked 13F filers disclose a position in AACOU as of the latest SEC 13F filings, a combined $83.8M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Adage Capital Partners GP, L.L.C. | 1.8M | $17.9M | ▲New +1.8M sh | Q1 2026 | |
| 2 | Linden Advisors LP | 1.4M | $13.4M | ▲New +1.4M sh | Q1 2026 | |
| 3 | Millennium Management LLC | 926K | $9.2M | ▲New +926K sh | Q1 2026 | |
| 4 | LMR Partners LLP | 900K | $9.0M | —Held | Q2 2026 | |
| 5 | Healthcare Of Ontario Pension Plan Trust Fund | 800K | $8.0M | ▲New +800K sh | Q1 2026 | |
| 6 | BNP Paribas Financial Markets | 686K | $6.8M | ▲New +686K sh | Q1 2026 | |
| 7 | Aristeia Capital, L.L.C. | 445K | $4.5M | ▲+0.3% Added · +1K sh | Q2 2026 | |
| 8 | Two Sigma Investments, LP | 363K | $3.6M | ▲New +363K sh | Q1 2026 | |
| 9 | Toronto Dominion Bank | 230K | $2.3M | ▲New +230K sh | Q1 2026 | |
| 10 | Calamos Advisors LLC | 214K | $2.2M | ▲+8.0% Added · +16K sh | Q2 2026 | |
| 11 | Lineage Point Capital LP | 199K | $2.0M | ▼−0.3% Reduced · −605 sh | Q2 2026 | |
| 12 | Berkley W R Corp | 160K | $1.6M | ▲New +160K sh | Q1 2026 | |
| 13 | Westchester Capital Management, LLC | 125K | $1.3M | —Held | Q2 2026 | |
| 14 | Stoic Point Capital Management LLC | 55K | $551K | —Held | Q2 2026 | |
| 15 | Prelude Capital Management, LLC | 55K | $551K | —Held | Q2 2026 | |
| 16 | Quarry LP | 25K | $251K | —Held | Q2 2026 | |
| 17 | Clear Street Group Inc. | 23K | $234K | ▲52× Added · +23K sh | Q2 2026 | |
| 18 | Royal Bank Of Canada | 20K | $197K | ▲New +20K sh | Q1 2026 | |
| 19 | Susquehanna International Group, LLP | 15K | $149K | ▲New +15K sh | Q1 2026 | |
| 20 | Tuttle Capital Management, LLC | 11K | $108K | ▲+7.7% Added · +769 sh | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 5 funds opened a new position in AACOU and 3 added to an existing one, while 1 reduced. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Their position there |
|---|---|---|
| Idea Acquisition CorpIACOU | 11 funds | $89.4M |
| Gores Holdings X Inc-CL AGTEN | 10 funds | $60.7M |
| D. Boral Arc Acquisit - CL ABCAR | 10 funds | $50.4M |
| Cambridge Acquisition CorpCAQUU | 10 funds | $46.3M |
| Blue Water Acquisition CorpBWIV/U | 10 funds | $45.7M |
| Viking Acquisition Corp - AVACI | 10 funds | $45.0M |
| Proem Acquisition Corp IPAACU | 10 funds | $36.5M |
| Mountain Lake Acquisiti-CL AMLAA | 9 funds | $91.7M |
| Eqv Ventures Acquisition C-AEVAC | 9 funds | $85.4M |
| Bleichroeder Acquis II-CL ABBCQ | 9 funds | $83.3M |
| Otg Acquisition Corp I-CL AOTGA | 9 funds | $63.7M |
| Silverbox Corp IV-ASBXD | 9 funds | $60.4M |
Ranked by how many of AACOU's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in AACOU.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Feb 20, 2026 | Abony Lorne | Chief Executive Officer, Director, 10% Owner | Buy (P) | 465K | — |
| Feb 20, 2026 | Abony Sponsor I LLC | 10% Owner | Buy (P) | 465K | — |
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 4 | 1 | – |
Insiders Form 4 open-market | 0 | 0 | $0 |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
| Class | 13F holders | Value held |
|---|---|---|
| AACOORD SHS CL A | 23 funds | $96.6M |
| AACOWWarrant | 21 funds | $1.6M |
| AACOUthis pageUnit | 20 funds | $83.8M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for AACOU
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/AACOU/capital-change-brief"
Use Arkolith's capital_change_brief for AACOU. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + the live filing stream, joined for AACOU. Filings are public domain, sourced to SEC EDGAR.