OmniAb (OABI)
OmniAb on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as services-commercial physical & biological research.
8.2M
Short interest
settlement 2026-09-30
6.8
Days to cover
+2.6 days vs prior
71.8%
Short share of volume
2026-10-12
385
Fails to deliver
settlement 2026-09-14
Tue 3 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-10-12.
Short interest
FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSONAs of 30 September 2026, short interest in OABI is 8,198,042 shares, up 2,214,903 shares over the last month. Over the last 48 readings it ranged from 4,680,231 shares (29 May 2026) to 9,067,068 shares (31 March 2025). At the reported average volume of 1.2M shares a day that is 6.8 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/oabi" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-30 | 8,198,042 | +15.1% | 1,214,656 | 6.75 |
| 2026-09-15 | 7,125,743 | +19.1% | 1,732,459 | 4.11 |
| 2026-08-31 | 5,983,139 | -4.2% | 3,240,703 | 1.85 |
| 2026-08-14 | 6,245,027 | +4.1% | 961,483 | 6.50 |
| 2026-07-31 | 5,997,131 | +2.0% | 339,704 | 17.65 |
| 2026-07-15 | 5,877,116 | +23.6% | 572,754 | 10.26 |
| 2026-06-30 | 4,754,413 | +1.2% | 746,071 | 6.37 |
| 2026-06-15 | 4,697,533 | +0.4% | 470,662 | 9.98 |
| 2026-05-29 | 4,680,231 | -4.9% | 849,429 | 5.51 |
| 2026-05-15 | 4,920,166 | -6.4% | 1,152,946 | 4.27 |
| 2026-04-30 | 5,255,853 | -3.8% | 652,576 | 8.05 |
| 2026-04-15 | 5,461,215 | -8.2% | 492,038 | 11.10 |
| 2026-03-31 | 5,947,662 | +5.5% | 310,860 | 19.13 |
| 2026-03-13 | 5,638,641 | -2.7% | 351,365 | 16.05 |
| 2026-02-27 | 5,793,722 | +0.1% | 207,027 | 27.99 |
| 2026-02-13 | 5,788,617 | -0.8% | 360,878 | 16.04 |
| 2026-01-30 | 5,837,094 | -1.4% | 491,228 | 11.88 |
| 2026-01-15 | 5,922,213 | -1.8% | 270,882 | 21.86 |
| 2025-12-31 | 6,030,426 | +14.4% | 675,864 | 8.92 |
| 2025-12-15 | 5,271,877 | -2.0% | 527,025 | 10.00 |
| 2025-11-28 | 5,378,146 | -3.4% | 632,017 | 8.51 |
| 2025-11-14 | 5,565,203 | -3.4% | 481,366 | 11.56 |
| 2025-10-31 | 5,758,932 | -3.7% | 549,167 | 10.49 |
| 2025-10-15 | 5,979,259 | -30.2% | 513,026 | 11.65 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 12 October 2026, the short share of OABI volume is 71.8%, up 15.4 points over the last five sessions. Over the last 30 readings it ranged from 34.5% (1 September 2026) to 77.6% (17 September 2026). The latest reading is 16.3 points above the 30-session average of 55.4%, on 538K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-12 | 386K | 538K | 71.8% | 0 |
| 2026-10-09 | 156K | 330K | 47.4% | 1 |
| 2026-10-08 | 405K | 607K | 66.6% | 407 |
| 2026-10-07 | 402K | 715K | 56.2% | 63,420 |
| 2026-10-06 | 564K | 815K | 69.2% | 85,001 |
| 2026-10-05 | 293K | 520K | 56.4% | 179 |
| 2026-10-02 | 455K | 759K | 60.0% | 0 |
| 2026-10-01 | 612K | 1.0M | 61.1% | 9,340 |
| 2026-09-30 | 647K | 928K | 69.8% | 390 |
| 2026-09-29 | 212K | 439K | 48.4% | 11 |
| 2026-09-28 | 131K | 232K | 56.4% | 0 |
| 2026-09-25 | 143K | 267K | 53.4% | 126 |
| 2026-09-24 | 230K | 450K | 51.1% | 0 |
| 2026-09-23 | 189K | 364K | 52.0% | 1 |
| 2026-09-22 | 228K | 430K | 52.9% | 2,280 |
| 2026-09-21 | 241K | 471K | 51.3% | 58 |
| 2026-09-18 | 163K | 299K | 54.5% | 0 |
| 2026-09-17 | 298K | 384K | 77.6% | 18 |
| 2026-09-16 | 165K | 307K | 53.7% | 1 |
| 2026-09-15 | 171K | 317K | 54.0% | 367 |
| 2026-09-14 | 401K | 671K | 59.8% | 6,534 |
| 2026-09-11 | 226K | 475K | 47.6% | 0 |
| 2026-09-10 | 311K | 587K | 53.1% | 771 |
| 2026-09-09 | 267K | 499K | 53.5% | 6,117 |
| 2026-09-08 | 269K | 471K | 57.1% | 2,517 |
| 2026-09-04 | 277K | 723K | 38.3% | 4,945 |
| 2026-09-03 | 448K | 802K | 55.9% | 9,672 |
| 2026-09-02 | 1.1M | 2.0M | 56.1% | 70,430 |
| 2026-09-01 | 170K | 494K | 34.5% | 0 |
| 2026-08-31 | 111K | 256K | 43.3% | 7,567 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 14 September 2026, the fails-to-deliver balance in OABI is 385 shares, unchanged over the last settlement date. Over the last 30 readings it ranged from 384 shares (3 August 2026) to 25,360 shares (20 August 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-14 | 385 | $4.07 | $2K |
| 2026-09-11 | 385 | $3.95 | $2K |
| 2026-09-10 | 385 | $4.02 | $2K |
| 2026-09-09 | 385 | $4.24 | $2K |
| 2026-09-08 | 385 | $4.33 | $2K |
| 2026-09-04 | 385 | $4.75 | $2K |
| 2026-09-03 | 385 | $5.04 | $2K |
| 2026-09-02 | 385 | $4.44 | $2K |
| 2026-09-01 | 385 | $4.38 | $2K |
| 2026-08-31 | 385 | $4.47 | $2K |
| 2026-08-28 | 385 | $4.61 | $2K |
| 2026-08-27 | 385 | $4.81 | $2K |
| 2026-08-26 | 385 | $4.66 | $2K |
| 2026-08-25 | 385 | $4.71 | $2K |
| 2026-08-24 | 385 | $4.33 | $2K |
| 2026-08-21 | 8,215 | $4.30 | $35K |
| 2026-08-20 | 25,360 | $4.19 | $106K |
| 2026-08-19 | 384 | $3.92 | $2K |
| 2026-08-18 | 384 | $3.82 | $1K |
| 2026-08-17 | 384 | $3.38 | $1K |
| 2026-08-14 | 1,041 | $3.43 | $4K |
| 2026-08-13 | 384 | $3.42 | $1K |
| 2026-08-12 | 384 | $3.38 | $1K |
| 2026-08-11 | 384 | $3.39 | $1K |
| 2026-08-10 | 384 | $3.08 | $1K |
| 2026-08-07 | 384 | $2.24 | $860 |
| 2026-08-06 | 654 | $2.03 | $1K |
| 2026-08-05 | 384 | $2.00 | $768 |
| 2026-08-04 | 384 | $1.96 | $753 |
| 2026-08-03 | 384 | $1.98 | $760 |
Insider trades
SEC Form 4, newest first, 50 of 100 shown. JSONNo open-market insider trades were reported for OABI in the last 90 days. The most recent filings are listed below. Latest filing: Love Steven (Director) on 2026-06-17.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-06-17 | Love Steven | Director | Option exercise | 20K | price not stated in the filing | not stated | 92K |
| 2026-06-17 | HIGGINS JOHN L | Director | Option exercise | 20K | price not stated in the filing | not stated | 3.0M |
| 2026-06-17 | Gotwals Philip J | Director | Option exercise | 20K | price not stated in the filing | not stated | 33K |
| 2026-06-17 | Crouse Steven C. | Director | Option exercise | 20K | price not stated in the filing | not stated | 33K |
| 2026-06-17 | Cochran Jennifer R. | Director | Option exercise | 20K | price not stated in the filing | not stated | 185K |
| 2026-06-17 | Bertozzi Carolyn R | Director | Option exercise | 20K | price not stated in the filing | not stated | 113K |
| 2026-04-21 | Crouse Steven C. | Director | Option exercise | 13K | price not stated in the filing | not stated | 13K |
| 2026-04-21 | Gotwals Philip J | Director | Option exercise | 13K | price not stated in the filing | not stated | 13K |
| 2026-04-07 | GUSTAFSON KURT A | Executive VP, Finance and CFO | Sell | 7K | $1.49 | $10K | 261K |
| 2026-04-07 | GUSTAFSON KURT A | Executive VP, Finance and CFO | Option exercise | 14K | $0.00 | $0 | 268K |
| 2026-04-07 | FOEHR MATTHEW W | President and CEO | Sell | 19K | $1.49 | $29K | 4.4M |
| 2026-04-07 | FOEHR MATTHEW W | President and CEO | Option exercise | 36K | $0.00 | $0 | 4.4M |
| 2026-04-07 | Berkman Charles S | Chief Legal Officer | Sell | 7K | $1.49 | $11K | 399K |
| 2026-04-07 | Berkman Charles S | Chief Legal Officer | Option exercise | 14K | $0.00 | $0 | 406K |
| 2026-02-18 | FOEHR MATTHEW W | President and CEO | Sell | 31K | $1.71 | $53K | 4.4M |
| 2026-02-18 | FOEHR MATTHEW W | President and CEO | Option exercise | 58K | price not stated in the filing | not stated | 4.4M |
| 2026-02-18 | GUSTAFSON KURT A | Executive VP, Finance and CFO | Sell | 9K | $1.71 | $16K | 269K |
| 2026-02-18 | GUSTAFSON KURT A | Executive VP, Finance and CFO | Option exercise | 19K | $0.00 | $0 | 278K |
| 2026-02-18 | Berkman Charles S | Chief Legal Officer | Sell | 10K | $1.71 | $17K | 393K |
| 2026-02-18 | Berkman Charles S | Chief Legal Officer | Option exercise | 19K | $0.00 | $0 | 402K |
| 2026-02-17 | GUSTAFSON KURT A | Executive VP, Finance and CFO | Sell | 7K | $1.70 | $12K | 259K |
| 2026-02-17 | FOEHR MATTHEW W | President and CEO | Sell | 21K | $1.70 | $35K | 4.4M |
| 2026-02-17 | Berkman Charles S | Chief Legal Officer | Sell | 7K | $1.70 | $12K | 384K |
| 2026-02-16 | GUSTAFSON KURT A | Executive VP, Finance and CFO | Option exercise | 14K | $0.00 | $0 | 266K |
| 2026-02-16 | FOEHR MATTHEW W | President and CEO | Option exercise | 36K | $0.00 | $0 | 4.4M |
| 2026-02-16 | Berkman Charles S | Chief Legal Officer | Option exercise | 14K | $0.00 | $0 | 391K |
| 2026-01-30 | HIGGINS JOHN L | Director | Option exercise | 13K | price not stated in the filing | not stated | 2.9M |
| 2025-12-08 | GUSTAFSON KURT A | Executive VP, Finance and CFO | Sell | 24K | $1.96 | $47K | 253K |
| 2025-12-08 | FOEHR MATTHEW W | President and CEO | Sell | 14K | $1.96 | $27K | 4.4M |
| 2025-12-08 | Berkman Charles S | Chief Legal Officer | Sell | 8K | $1.96 | $16K | 377K |
| 2025-12-07 | GUSTAFSON KURT A | Executive VP, Finance and CFO | Option exercise | 47K | $0.00 | $0 | 277K |
| 2025-12-07 | FOEHR MATTHEW W | President and CEO | Option exercise | 27K | $0.00 | $0 | 4.4M |
| 2025-12-07 | Berkman Charles S | Chief Legal Officer | Option exercise | 16K | $0.00 | $0 | 385K |
| 2025-11-07 | HIGGINS JOHN L | Director | Buy | 41K | $1.38 | $57K | 2.9M |
| 2025-11-06 | HIGGINS JOHN L | Director | Buy | 36K | $1.41 | $51K | 2.9M |
| 2025-11-01 | Love Steven | Director | Option exercise | 13K | price not stated in the filing | not stated | 72K |
| 2025-11-01 | Bertozzi Carolyn R | Director | Option exercise | 18K | price not stated in the filing | not stated | 93K |
| 2025-08-26 | FOEHR MATTHEW W | President and CEO | Grant | 541K | $1.85 | $1000K | 4.3M |
| 2025-06-17 | Bertozzi Carolyn R | Director | Option exercise | 20K | price not stated in the filing | not stated | 76K |
| 2025-06-17 | Cochran Jennifer R. | Director | Option exercise | 20K | price not stated in the filing | not stated | 165K |
| 2025-06-17 | HIGGINS JOHN L | Director | Option exercise | 20K | price not stated in the filing | not stated | 2.9M |
| 2025-06-17 | Love Steven | Director | Option exercise | 20K | price not stated in the filing | not stated | 58K |
| 2025-05-15 | Cochran Jennifer R. | Director | Buy | 30K | $1.52 | $46K | 145K |
| 2025-05-14 | Love Steven | Director | Buy | 25K | $1.46 | $37K | 38K |
| 2025-05-12 | HIGGINS JOHN L | Director | Buy | 65K | $1.44 | $94K | 2.8M |
| 2025-04-07 | GUSTAFSON KURT A | Executive VP, Finance and CFO | Option exercise | 14K | $0.00 | $0 | 231K |
| 2025-04-07 | GUSTAFSON KURT A | Executive VP, Finance and CFO | Sell | 7K | $2.00 | $14K | 224K |
| 2025-04-07 | Berkman Charles S | Chief Legal Officer | Option exercise | 14K | $0.00 | $0 | 370K |
| 2025-04-07 | Berkman Charles S | Chief Legal Officer | Sell | 7K | $2.00 | $14K | 363K |
| 2025-04-07 | FOEHR MATTHEW W | President and CEO | Sell | 19K | $2.00 | $39K | 3.8M |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON9 Form 144 notices on file for OABI worth $197K at the prices reported; 0 in the last 90 days worth $0. Latest: GUSTAFSON KURT A filed on 2026-04-07 to sell 6,913 shares ($10K) from 2026-04-07.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-04-07 | GUSTAFSON KURT AOfficer | 7K | $10K | 0.005% | 2026-04-07 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES |
| 2026-04-07 | FOEHR MATTHEW WOfficer | 19K | $29K | 0.013% | 2026-04-07 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES |
| 2026-04-07 | Berkman Charles SOfficer | 7K | $11K | 0.005% | 2026-04-07 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES |
| 2026-02-17 | GUSTAFSON KURT AOfficer | 7K | $12K | 0.005% | 2026-02-17 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES |
| 2026-02-17 | FOEHR MATTHEW WOfficer | 20K | $35K | 0.014% | 2026-02-17 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES |
| 2026-02-17 | Berkman Charles SOfficer | 7K | $12K | 0.005% | 2026-02-17 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES |
| 2025-12-08 | GUSTAFSON KURT AOfficer | 24K | $47K | 0.017% | 2025-12-08 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES |
| 2025-12-08 | FOEHR MATTHEW WOfficer | 14K | $27K | 0.009% | 2025-12-08 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES |
| 2025-12-08 | Berkman Charles SOfficer | 8K | $16K | 0.006% | 2025-12-08 | MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON6 holders report 5% or more of OABI in their latest filing, all on Schedule 13G (passive). The largest reported stake is Robert Goldstein at 8.5% of the class (12,291,972 shares), filed 2026-02-10 for an event on 2025-12-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-14 | 13G/Ano. 3 | Joseph Kaplanindividual, parent holding company | 10.2M | 7.1% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 3 | David Salanicindividual, parent holding company | 10.2M | 7.1% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 3 | Whitefort Capital Management, LPpartnership, investment adviser | 10.2M | 7.1% | 2026-06-30 |
| 2026-02-10 | 13G/Ano. 2 | Robert Goldsteinindividual, parent holding company | 12.3M | 8.5% | 2025-12-31 |
| 2026-02-10 | 13G/Ano. 2 | Ash X LPpartnership | 7.6M | 5.3% | 2025-12-31 |
| 2026-02-10 | 13G/Ano. 2 | RLG GP LLCother entity | 7.6M | 5.3% | 2025-12-31 |
| 2026-02-10 | 13G/Ano. 2 | RLG Capco II LLCother entity | 4.7M | 3.3% | 2025-12-31 |
| 2026-02-10 | 13G/Ano. 2 | Joel Greenblattindividual, parent holding company | 1.4M | 1.0% | 2025-12-31 |
| 2026-02-10 | 13G/Ano. 2 | Gotham Asset Management Holdings, LPparent holding company, partnership | 1K | 0.0% | 2025-12-31 |
| 2026-02-10 | 13G/Ano. 2 | Gotham Asset Management, LLCinvestment adviser, other entity | 1K | 0.0% | 2025-12-31 |
| 2026-02-10 | 13G/Ano. 2 | Gotham GP LLCother entity, parent holding company | 1K | 0.0% | 2025-12-31 |
13F holders
Tracked managers holding OABI at their latest 13F. JSON6 of the 30 tracked managers held OABI at their latest 13F, $5.9M in total at quarter-end prices. Two Sigma Investments is the largest at $1.6M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Two Sigma Investments | 2026-06-30 | 657K | $1.6M | 0.00% | +145K |
| Renaissance Technologies | 2026-06-30 | 600K | $1.5M | 0.00% | +331K |
| D. E. Shaw & Co. | 2026-06-30 | 559K | $1.4M | 0.00% | +179K |
| Millennium Management | 2026-06-30 | 474K | $864K | 0.00% | -50K |
| AQR Capital Management | 2026-06-30 | 158K | $388K | 0.00% | +42K |
| Citadel Advisors | 2026-06-30 | 58K | $143K | 0.00% | -170K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
OmniAb in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows OmniAb (OABI), SEC CIK 1846253, listed on Nasdaq, classified by the SEC as services-commercial physical & biological research. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-12.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-14.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-04-07.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-14.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-06.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-06-17.JSON and CSV
- Company record
- EDGAR filing index for CIK 1846253Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as services-commercial physical & biological research
Other company pages
Datasets
Frequently Asked Questions
How much of OABI is sold short?
What is OABI's daily short volume?
Does OABI have fails to deliver?
Are OABI insiders buying or selling?
Have OABI insiders filed to sell?
Who owns 5% or more of OABI?
Which tracked 13F managers own OABI?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.