OmniAb, Inc. - Common Stock, par value $0.0001 per share (OABI)
CUSIP: 68218J103
Q4 2025 13F Holders as of 31 Dec 2025
- Type / Class
- Equity / Common Stock, par value $0.0001 per share
- Shares outstanding
- 144,611,435
- Total 13F shares
- 57,293,183
- Share change
- -5,163,859
- Total reported value
- $105,777,712
- Price per share
- $1.85
- Number of holders
- 129
- Value change
- -$9,466,573
- Number of buys
- 54
- Number of sells
- 60
Quarterly Holders Quick Answers
What is CUSIP 68218J103?
CUSIP 68218J103 identifies OABI - OmniAb, Inc. - Common Stock, par value $0.0001 per share in SEC institutional holdings data.
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Recent filing periods for CUSIP 68218J103:
Top shareholders of OABI - OmniAb, Inc. - Common Stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Avista Acquisition GP LLC II |
3/4/5
|
Director, 10%+ Owner |
—
mixed-class rows
|
14,817,674
mixed-class rows
|
$85,344,500 | — | 09 Dec 2022 | |
| Avista Capital Managing Member V, LLC |
3/4/5
|
10%+ Owner |
—
mixed-class rows
|
27,274,972
mixed-class rows
|
$59,485,556 | — | 28 Jun 2024 | |
| Whitefort Capital Management, LP |
13F
13D/G
|
Company |
9.9%
from 13D/G
|
14,223,658
|
$22,757,853 | — | 30 Sep 2025 | |
| Ash X LP |
13D/G
|
Robert Goldstein |
8.5%
|
12,291,972
|
$22,740,148 | +$4,107,701 | 31 Dec 2025 | |
| BlackRock, Inc. |
13F
|
Company |
4.8%
|
6,964,222
|
$11,142,756 | — | 30 Sep 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
3.6%
|
5,148,061
|
$8,236,897 | — | 30 Sep 2025 | |
| CADIAN CAPITAL MANAGEMENT, LP |
13F
|
Company |
2.5%
|
3,675,568
|
$5,880,909 | — | 30 Sep 2025 | |
| Woodline Partners LP |
13F
|
Company |
2%
|
2,857,142
|
$4,571,427 | — | 30 Sep 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.8%
|
2,548,284
|
$4,077,330 | — | 30 Sep 2025 | |
| PRIVATE MANAGEMENT GROUP INC |
13F
|
Company |
1.7%
|
2,518,279
|
$4,029,246 | — | 30 Sep 2025 | |
| RICE HALL JAMES & ASSOCIATES, LLC |
13F
|
Company |
1.7%
|
2,412,038
|
$3,859,261 | — | 30 Sep 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.6%
|
2,326,236
|
$3,722,772 | — | 30 Sep 2025 | |
| Stonepine Capital Management, LLC |
13F
|
Company |
1.5%
|
2,142,857
|
$3,428,571 | — | 30 Sep 2025 | |
| STATE STREET CORP |
13F
|
Company |
1.4%
|
2,094,846
|
$3,351,754 | — | 30 Sep 2025 | |
| JANUS HENDERSON GROUP PLC |
13D/G
|
— |
0.8%
|
948,434
|
$2,086,555 | -$15,655,944 | 30 Jun 2025 | |
| ADAR1 Capital Management, LLC |
13F
|
Company |
0.75%
|
1,090,628
|
$1,745,005 | — | 30 Sep 2025 | |
| JACOBS LEVY EQUITY MANAGEMENT, INC |
13F
|
Company |
0.7%
|
1,006,256
|
$1,610,010 | — | 30 Sep 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.6%
|
874,510
|
$1,399,216 | — | 30 Sep 2025 | |
| BARCLAYS PLC |
3/4/5
13F
|
Not a 10% owner · Company |
0.1%
from 13F
|
134,344
|
$1,343,440 | — | 04 Nov 2022 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.58%
|
836,799
|
$1,338,878 | — | 30 Sep 2025 | |
| TOWERVIEW LLC |
13F
|
Company |
0.57%
|
831,100
|
$1,329,760 | — | 30 Sep 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.57%
|
820,222
|
$1,312,355 | — | 30 Sep 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.57%
|
818,466
|
$1,309,546 | — | 30 Sep 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.54%
|
785,477
|
$1,256,763 | — | 30 Sep 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.53%
|
762,912
|
$1,220,659 | — | 30 Sep 2025 | |
| ISTHMUS PARTNERS, LLC |
13F
|
Company |
0.46%
|
669,071
|
$1,070,514 | — | 30 Sep 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.41%
|
587,786
|
$940,458 | — | 30 Sep 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.36%
|
523,454
|
$837,526 | — | 30 Sep 2025 | |
| Kent Lake PR LLC |
13F
|
Company |
0.35%
|
500,000
|
$800,000 | — | 30 Sep 2025 | |
| WOODSTOCK CORP |
13F
|
Company |
0.24%
|
351,753
|
$562,805 | — | 30 Sep 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.21%
|
303,162
|
$485,000 | — | 30 Sep 2025 | |
| TANG CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.21%
|
300,000
|
$480,000 | — | 30 Sep 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.2%
|
291,735
|
$466,776 | — | 30 Sep 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.18%
|
263,698
|
$421,917 | — | 30 Sep 2025 | |
| GSA CAPITAL PARTNERS LLP |
13F
|
Company |
0.18%
|
262,371
|
$420,000 | — | 30 Sep 2025 | |
| TLS Advisors LLC |
13F
|
Company |
0.17%
|
250,185
|
$388,000 | — | 30 Sep 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.16%
|
232,787
|
$372,459 | — | 30 Sep 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.13%
|
189,082
|
$302,531 | — | 30 Sep 2025 | |
| Sarah Boyce |
3/4/5
|
Director |
—
mixed-class rows
|
128,381
mixed-class rows
|
$301,970 | — | 18 Jun 2024 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
0.13%
|
186,281
|
$298,049 | — | 30 Sep 2025 | |
| Graham Capital Management, L.P. |
13F
|
Company |
0.12%
|
167,172
|
$267,475 | — | 30 Sep 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.2%
|
285,801
|
$260,069 | — | 30 Sep 2025 | |
| RHUMBLINE ADVISERS |
13F
|
Company |
0.11%
|
160,936
|
$257,488 | — | 30 Sep 2025 | |
| Arbiter Partners Capital Management LLC |
13F
|
Company |
0.11%
|
160,529
|
$256,846 | — | 30 Sep 2025 | |
| FMR LLC |
13F
|
Company |
0.11%
|
154,546
|
$247,273 | — | 30 Sep 2025 | |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.11%
|
153,900
|
$246,240 | — | 30 Sep 2025 | |
| ALLIANCEBERNSTEIN L.P. |
13F
|
Company |
0.1%
|
150,592
|
$240,947 | — | 30 Sep 2025 | |
| Jennifer R. Cochran |
3/4/5
|
Director |
—
mixed-class rows
|
225,274
mixed-class rows
|
$206,592 | +$45,600 | 17 Jun 2025 | |
| TWO SIGMA ADVISERS, LP |
13F
|
Company |
0.09%
|
126,030
|
$201,648 | — | 30 Sep 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.09%
|
124,051
|
$198,482 | — | 30 Sep 2025 |
Institutional Holders of OmniAb, Inc. - Common Stock, par value $0.0001 per share (OABI) as of Q4 2025
As of 31 Dec 2025,
OmniAb, Inc. - Common Stock, par value $0.0001 per share (OABI) was held by
129 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
57,293,183 shares.
The largest 10 holders included
Whitefort Capital Management, LP, BlackRock, Inc., VANGUARD GROUP INC, CADIAN CAPITAL MANAGEMENT, LP, GEODE CAPITAL MANAGEMENT, LLC, PRIVATE MANAGEMENT GROUP INC, RICE HALL JAMES & ASSOCIATES, LLC, DIMENSIONAL FUND ADVISORS LP, STATE STREET CORP, and TOWERVIEW LLC.
This page lists
129
institutional shareholders reporting positions in this security
for the Q4 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
139
Q4 2025 holders
129
Holder diff
-10
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 Value $ | Q4 2025 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.