Among active 13F managers last quarter, 2 opened and 3 added, while 3 reduced; the largest holder to move was Picton Mahoney Asset Management (+1.5%). No recent Form 4 insider filings for OBA.
Funds lean in and no leg opposes.
53 tracked 13F filers disclose a position in OBA as of the latest SEC 13F filings, a combined $192.3M 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 | Magnetar Financial LLC | 1.3M | $12.8M | —Held | Q2 2026 | |
| 2 | D. E. Shaw & Co., Inc. | 1.2M | $12.6M | —Held | Q1 2026 | |
| 3 | Westchester Capital Management, LLC | 1.1M | $11.4M | —Held | Q2 2026 | |
| 4 | Picton Mahoney Asset Management | 1.0M | $10.4M | ▲+1.5% Added · +15K sh | Q2 2026 | |
| 5 | Karpus Management, Inc. | 846K | $8.6M | ▼−1.8% Reduced · −16K sh | Q2 2026 | |
| 6 | AQR Arbitrage LLC | 813K | $8.3M | ▲+0.9% Added · +7K sh | Q2 2026 | |
| 7 | Two Sigma Investments, LP | 691K | $7.0M | —Held | Q1 2026 | |
| 8 | Aristeia Capital, L.L.C. | 650K | $6.6M | —Held | Q2 2026 | |
| 9 | Radcliffe Capital Management, L.P. | 625K | $6.4M | —Held | Q2 2026 | |
| 10 | TIG Advisors, LLC | 602K | $6.1M | —Held | Q2 2026 | |
| 11 | Tenor Capital Management Co., L.P. | 600K | $6.1M | —Held | Q2 2026 | |
| 12 | Logan Stone Capital, LLC | 502K | $5.1M | —Held | Q2 2026 | |
| 13 | Hudson Bay Capital Management LP | 500K | $5.1M | —Held | Q2 2026 | |
| 14 | Jain Global LLC | 500K | $5.1M | —Held | Q2 2026 | |
| 15 | Ghisallo Capital Management LLC | 500K | $5.1M | —Held | Q2 2026 | |
| 16 | Polar Asset Management Partners Inc. | 500K | $5.1M | —Held | Q2 2026 | |
| 17 | Linden Advisors LP | 500K | $5.1M | —Held | Q1 2026 | |
| 18 | Verition Fund Management LLC | 499K | $5.1M | —Held | Q2 2026 | |
| 19 | Wealthspring Capital LLC | 451K | $4.6M | ▼−0.3% Reduced · −1K sh | Q2 2026 | |
| 20 | Berkley W R Corp | 425K | $4.3M | —Held | Q1 2026 | |
| 21 | Millennium Management LLC | 400K | $4.1M | —Held | Q1 2026 | |
| 22 | Shaolin Capital Management LLC | 377K | $3.9M | ▼−14% Reduced · −60K sh | Q2 2026 | |
| 23 | Periscope Capital Inc. | 325K | $3.3M | —Held | Q2 2026 | |
| 24 | Context Capital Management, LLC | 300K | $3.1M | —Held | Q2 2026 | |
| 25 | Commonwealth Of Pennsylvania Public School Empls Retrmt Sys | 300K | $3.0M | —Held | Q1 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, 2 funds opened a new position in OBA and 3 added to an existing one, while 3 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 |
|---|---|---|
| Pioneer Acquisition I-CL APACH | 40 funds | $157.1M |
| Eqv Ventures Acquisition C-AEVAC | 36 funds | $233.8M |
| Cantor Equity Partners-CL ACEPF | 35 funds | $168.3M |
| Trailblazer Acquisition-CL ABLZR | 35 funds | $140.8M |
| Cantor Equity Partners-CL ACEPV | 35 funds | $116.2M |
| Apex Treasury Corp-CL AAPXT | 34 funds | $187.3M |
| Oyster Enterprises II Acq-AOYSE | 34 funds | $173.5M |
| M3-Brigade Acquisition-CL AMBVI | 34 funds | $170.8M |
| Republic Digital Acquis-CL ARDAG | 34 funds | $152.5M |
| Lightwave Acquisition Corp-ALWAC | 34 funds | $148.2M |
| Cal Redwood Acquisit-CL ACRAQ | 34 funds | $145.6M |
| Drugs Made In America AcquisDMII | 33 funds | $278.2M |
Ranked by how many of OBA's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in OBA.
No open-market insider transactions on file yet. Grants, gifts, and exercises live on the full insider page.
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 | 6 | 4 | – |
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 |
|---|---|---|
| OBAthis pageUSDCL | 53 funds | $192.3M |
| OBAWWWarrant | 42 funds | $2.1M |
| OBAWUUnit | 10 funds | $26.6M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
No filings captured for this ticker in the live stream yet.
Connected entities for OBA
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/OBA/capital-change-brief"
Use Arkolith's capital_change_brief for OBA. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for OBA. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.