113 tracked 13F filers disclose a position in OABI as of the latest SEC 13F filings, a combined $67.6M 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 | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $12.7M | 8.1M | ▲+0.5% Added · +42K sh | Q1 2026 | |
| 2 | CADIAN CAPITAL MANAGEMENT, LP | $6.5M | 4.2M | ▼−6.3% Reduced · −278K sh | Q1 2026 | |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $6.3M | 4.0M | →First observed position No prior filed position | Q1 2026 | |
| 4 | GEODE CAPITAL MANAGEMENT, LLC | $4.6M | 2.9M | ▲+7.5% Added · +203K sh | Q1 2026 | |
| 5 | RICE HALL JAMES & ASSOCIATES, LLC | $4.0M | 2.5M | ▲+6.1% Added · +146K sh | Q1 2026 | |
| 6 | PRIVATE MANAGEMENT GROUP INC | $5.8M | 2.3M | ▼−3.5% Reduced · −84K sh | Q2 2026 | |
| 7 | STATE STREET CORP | $3.2M | 2.1M | ▲+0.9% Added · +18K sh | Q1 2026 | |
| 8 | DIMENSIONAL FUND ADVISORS LP | $2.7M | 1.7M | ▼−19% Reduced · −407K sh | Q1 2026 | |
| 9 | TOWERVIEW LLC | $2.9M | 1.2M | ▲+18% Added · +180K sh | Q2 2026 | |
| 10 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.5M | 960K | ▼−0.7% Reduced · −6K sh | Q1 2026 | |
| 11 | VANGUARD PORTFOLIO MANAGEMENT LLC | $1.4M | 904K | →First observed position No prior filed position | Q1 2026 | |
| 12 | NORTHERN TRUST CORP | $1.4M | 881K | ▲+6.3% Added · +52K sh | Q1 2026 | |
| 13 | ISTHMUS PARTNERS, LLC | $2.0M | 803K | ▲+6.2% Added · +47K sh | Q2 2026 | |
| 14 | VANGUARD FIDUCIARY TRUST CO | $1.1M | 726K | →First observed position No prior filed position | Q1 2026 | |
| 15 | ADAR1 Capital Management, LLC | $1.1M | 705K | ▲+0.4% Added · +3K sh | Q1 2026 | |
| 16 | Nuveen, LLC | $979K | 624K | ▼−29% Reduced · −251K sh | Q1 2026 | |
| 17 | MILLENNIUM MANAGEMENT LLC | $630K | 524K | ▼−22% Reduced · −149K sh | Q1 2026 | |
| 18 | TWO SIGMA INVESTMENTS, LP | $805K | 513K | ▲+21% Added · +90K sh | Q1 2026 | |
| 19 | GOLDMAN SACHS GROUP INC | $658K | 419K | ▼−22% Reduced · −121K sh | Q1 2026 | |
| 20 | MORGAN STANLEY | $640K | 408K | ▲+4.7% Added · +18K sh | Q1 2026 | |
| 21 | D. E. Shaw & Co., Inc. | $597K | 380K | ▼−0.8% Reduced · −3K sh | Q1 2026 | |
| 22 | Bank of New York Mellon Corp | $431K | 274K | ▲+2.2% Added · +6K sh | Q1 2026 | |
| 23 | RENAISSANCE TECHNOLOGIES LLC | $423K | 270K | ▲+11% Added · +27K sh | Q1 2026 | |
| 24 | CITADEL ADVISORS LLC | $359K | 229K | ▼−20% Reduced · −56K sh | Q1 2026 | |
| 25 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $312K | 199K | —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, 6 funds opened a new position in OABI and 16 added to an existing one, while 16 reduced and 0 exited entirely — 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 | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 53 funds | $199.9B |
| MICROSOFT CORPMSFT | 53 funds | $132.6B |
| ELI LILLY & COLLY | 53 funds | $38.6B |
| APPLE INCAAPL | 52 funds | $150.1B |
| BROADCOM INCAVGO | 52 funds | $78.9B |
| MERCK & CO. INC.MRK | 52 funds | $12.9B |
| CHEVRON CORPCVX | 52 funds | $12.4B |
| AMAZON.COM INCAMZN | 51 funds | $92.7B |
| ALPHABET INC-CL AGOOGL | 51 funds | $73.7B |
| META PLATFORMS INC-CLASS AMETA | 51 funds | $56.7B |
| COSTCO WHOLESALE CORPCOST | 51 funds | $19.4B |
| ALPHABET INC-CL CGOOG | 50 funds | $65.3B |
Ranked by how many of OABI's institutional holders also hold each name, a cross-fund conviction signal.
| 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 |
| Class | 13F holders | Value held |
|---|---|---|
| OABIthis pagecs | 113 funds | $67.6M |
| OABIWWarrant | 8 funds | $244K |
| 68218J202Common Stock | 1 funds | $0 |
| 68218J301Common Stock | 1 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.