Among active 13F managers last quarter, 6 opened and 20 added, while 13 reduced; the largest holder to move was Cadian Capital Management, LP (+1.3%). Over the last 180 days, 3 insiders sold and none bought, a net -$50K in open-market trades.
The legs disagree, or only one of them leans.
119 tracked 13F filers disclose a position in OABI as of the latest SEC 13F filings, a combined $93.5M 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 | BlackRock, Inc. | 8.9M | $21.9M | ▲+9.8% Added · +791K sh | Q2 2026 | |
| 2 | Cadian Capital Management, LP | 4.2M | $10.4M | ▲+1.3% Added · +55K sh | Q2 2026 | |
| 3 | Vanguard Capital Management LLC | 3.9M | $9.5M | ▼−3.5% Reduced · −141K sh | Q2 2026 | |
| 4 | Geode Capital Management, LLC | 2.9M | $7.1M | ▼−1.4% Reduced · −42K sh | Q2 2026 | |
| 5 | Rice Hall James & Associates, LLC | 2.6M | $6.4M | ▲+2.5% Added · +63K sh | Q2 2026 | |
| 6 | Private Management Group Inc | 2.3M | $5.8M | ▼−3.5% Reduced · −84K sh | Q2 2026 | |
| 7 | State Street Corp | 2.1M | $5.2M | ▲+3.2% Added · +66K sh | Q2 2026 | |
| 8 | Dimensional Fund Advisors LP | 1.7M | $2.7M | ▼−19% Reduced · −407K sh | Q1 2026 | |
| 9 | Towerview LLC | 1.2M | $2.9M | ▲+18% Added · +180K sh | Q2 2026 | |
| 10 | Vanguard Portfolio Management LLC | 980K | $2.4M | ▲+8.5% Added · +77K sh | Q2 2026 | |
| 11 | Charles Schwab Investment Management Inc | 960K | $1.5M | ▼−0.7% Reduced · −6K sh | Q1 2026 | |
| 12 | Northern Trust Corp | 881K | $1.4M | ▲+6.3% Added · +52K sh | Q1 2026 | |
| 13 | Isthmus Partners, LLC | 803K | $2.0M | ▲+6.2% Added · +47K sh | Q2 2026 | |
| 14 | Vanguard Fiduciary Trust Co | 758K | $1.9M | ▲+4.5% Added · +33K sh | Q2 2026 | |
| 15 | ADAR1 Capital Management, LLC | 705K | $1.1M | ▲+0.4% Added · +3K sh | Q1 2026 | |
| 16 | Nuveen, LLC | 624K | $979K | ▼−29% Reduced · −251K sh | Q1 2026 | |
| 17 | Millennium Management LLC | 524K | $630K | ▼−22% Reduced · −149K sh | Q1 2026 | |
| 18 | Two Sigma Investments, LP | 513K | $805K | ▲+21% Added · +90K sh | Q1 2026 | |
| 19 | Goldman Sachs Group Inc | 419K | $658K | ▼−22% Reduced · −121K sh | Q1 2026 | |
| 20 | Morgan Stanley | 408K | $640K | ▲+4.7% Added · +18K sh | Q1 2026 | |
| 21 | D. E. Shaw & Co., Inc. | 380K | $597K | ▼−0.8% Reduced · −3K sh | Q1 2026 | |
| 22 | Bank of New York Mellon Corp | 274K | $431K | ▲+2.2% Added · +6K sh | Q1 2026 | |
| 23 | Renaissance Technologies LLC | 270K | $423K | ▲+11% Added · +27K sh | Q1 2026 | |
| 24 | FMR LLC | 200K | $492K | ▲+5.4% Added · +10K sh | Q2 2026 | |
| 25 | Bridgeway Capital Management, LLC | 199K | $489K | —Held | 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, 6 funds opened a new position in OABI and 20 added to an existing one, while 13 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 |
|---|---|---|
| Nvidia CorpNVDA | 60 funds | $208.1B |
| Eli Lilly & CoLLY | 60 funds | $43.8B |
| Microsoft CorpMSFT | 59 funds | $122.5B |
| Apple IncAAPL | 58 funds | $147.4B |
| Amazon.com IncAMZN | 58 funds | $94.1B |
| Merck & Co. Inc.MRK | 58 funds | $12.3B |
| Alphabet Inc-CL AGOOGL | 57 funds | $88.1B |
| Broadcom IncAVGO | 57 funds | $84.5B |
| Meta Platforms Inc-Class AMETA | 57 funds | $54.5B |
| Visa Inc-Class A SharesV | 57 funds | $31.7B |
| Costco Wholesale CorpCOST | 57 funds | $18.6B |
| Cisco Systems IncCSCO | 57 funds | $16.0B |
Ranked by how many of OABI's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in OABI.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Apr 7, 2026 | Gustafson Kurt A | Executive VP, Finance and CFO | Sell (S) | 7K | $10K |
| Apr 7, 2026 | Berkman Charles S | Chief Legal Officer | Sell (S) | 7K | $11K |
| Apr 7, 2026 | Foehr Matthew W | President and CEO, Director | Sell (S) | 19K | $29K |
| Feb 18, 2026 | Foehr Matthew W | President and CEO, Director | Sell (S) | 31K | $53K |
| Feb 18, 2026 | Berkman Charles S | Chief Legal Officer | Sell (S) | 10K | $17K |
| Feb 18, 2026 | Gustafson Kurt A | Executive VP, Finance and CFO | Sell (S) | 9K | $16K |
| Feb 17, 2026 | Berkman Charles S | Chief Legal Officer | Sell (S) | 7K | $12K |
| Feb 17, 2026 | Gustafson Kurt A | Executive VP, Finance and CFO | Sell (S) | 7K | $12K |
| Feb 17, 2026 | Foehr Matthew W | President and CEO, Director | Sell (S) | 21K | $35K |
| Dec 8, 2025 | Foehr Matthew W | President and CEO, Director | Sell (S) | 14K | $27K |
| Dec 8, 2025 | Berkman Charles S | Chief Legal Officer | Sell (S) | 8K | $16K |
| Dec 8, 2025 | Gustafson Kurt A | Executive VP, Finance and CFO | Sell (S) | 24K | $47K |
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 | 44 | 32 | – |
Insiders Form 4 open-market | 0 | 3 | -$50K |
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 |
|---|---|---|
| OABIthis pagecs | 119 funds | $93.5M |
| OABIWWarrant | 9 funds | $250K |
| 68218J202RIGHT | 2 funds | $0 |
| 68218J301RIGHT | 2 funds | $0 |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for OABI
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/OABI/capital-change-brief"
Use Arkolith's capital_change_brief for OABI. 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 OABI. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.