Who owns OmniAb, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from SEC filings.
Institutional ownership of OABI from SEC Form 13F filings across 100 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 100 institutions disclosed 36.4M shares of OmniAb, Inc. worth $88.5M — about 28.3% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
100
13F holders
$88.5M
value, 2026 filers
28.3%
of shares outstanding (36.4M sh)
14
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of OABI's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 8.9M | $21.9M | 0.0% | 6.9% | +9.8% |
| 2 | NOMURA HOLDINGS INC | 5.0M | $12.4M | 0.0% | 3.9% | +613.2% |
| 3 | CADIAN CAPITAL MANAGEMENT, LP | 4.2M | $10.4M | 0.8% | 3.3% | +1.3% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 3.9M | $9.5M | 0.0% | 3% | -51.8% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 2.9M | $7.1M | 0.0% | 2.2% | -1.4% |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | 980,416 | $2.4M | 0.0% | 0.8% | +8.5% |
| 7 | Sixth Street Partners Management Company, L.P.NEW | 966,877 | $2.4M | 0.4% | 0.8% | new |
| 8 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 966,877 | $2.4M | 0.0% | 0.8% | +0.8% |
| 9 | NORTHERN TRUST CORP | 948,294 | $2.3M | 0.0% | 0.7% | +7.7% |
| 10 | VANGUARD FIDUCIARY TRUST CO | 758,460 | $1.9M | 0.0% | 0.6% | +4.5% |
| 11 | TWO SIGMA INVESTMENTS, LP | 657,432 | $1.6M | 0.0% | 0.5% | +28.2% |
| 12 | Nuveen, LLC | 642,811 | $1.6M | 0.0% | 0.5% | +3.0% |
| 13 | D. E. Shaw & Co., Inc. | 559,404 | $1.4M | 0.0% | 0.4% | +47.1% |
| 14 | MACKENZIE FINANCIAL CORPNEW | 489,134 | $1.2M | 0.0% | 0.4% | new |
| 15 | MILLENNIUM MANAGEMENT LLC | 474,159 | $864,306 | 0.0% | 0.4% | -9.5% |
| 16 | GOLDMAN SACHS GROUP INC | 384,573 | $946,049 | 0.0% | 0.3% | -8.2% |
| 17 | MORGAN STANLEY | 371,506 | $913,905 | 0.0% | 0.3% | -8.9% |
| 18 | Bank of New York Mellon Corp | 318,406 | $783,279 | 0.0% | 0.2% | +16.0% |
| 19 | FMR LLC | 199,818 | $491,552 | 0.0% | 0.2% | +5.4% |
| 20 | RHUMBLINE ADVISERS | 171,957 | $423,003 | 0.0% | 0.1% | +8.0% |
| 21 | Invesco Ltd. | 161,376 | $396,986 | 0.0% | 0.1% | +19.5% |
| 22 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIPNEW | 159,621 | $392,668 | 0.0% | 0.1% | new |
| 23 | ALLIANCEBERNSTEIN L.P. | 155,992 | $244,907 | 0.0% | 0.1% | +3.6% |
| 24 | BANK OF AMERICA CORP /DE/ | 149,493 | $367,753 | 0.0% | 0.1% | +22.9% |
| 25 | Walleye Capital LLCNEW | 144,427 | $355,290 | 0.0% | 0.1% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.