A quick note on timing. The figures on this page come from different places and refresh on different clocks. Exchange short interest is reported twice a month, FINRA short volume lands every trading day, SEC fails to deliver arrive about two weeks late, and borrow numbers move throughout the day, so two figures here can carry different as of dates. Anything tagged PREVIEW is sample data while we finish wiring its live feed. Prices are delayed 15 minutes. This page is for education, not investment advice.

OmniAb Inc. (OABI) Short Interest, Short Squeeze & Borrow Rates ● LIVE

OmniAb Inc. · NASDAQ · Healthcare

$1.96-0.07 (-3.45%)

15-min delayed · Jul 28, 3:45 PM ET · Get real-time quotes →

About 1.52M shares of OmniAb Inc. are sold short, or roughly 3.98% of the float. At recent volume that works out to about 6.40 days to cover, with a borrow fee near 89.35% and a squeeze score of 40.0 out of 100. No single number tells you whether a squeeze is coming, so it helps to read the whole picture below.

Basic stats

Short Interest

1,524,759 shares

source: NASDAQ / EODHD

Short Interest Ratio

6.40 days to cover

source: NASDAQ / EODHD

Short Interest % Float

3.98%

source: NASDAQ · Capital IQ (float)

Off-Exch. Short Volume

2,400 shares

source: FINRA (inc. dark pool)

Off-Exch. Short Vol %

96.10%

source: FINRA (inc. dark pool)

Introduction

This page gathers everything we track on the short side of OmniAb Inc. (OABI) in one place, ordered by how quickly each number changes. The fastest moving figures, like the borrow fee, sit near the top. Daily figures such as short volume and fails to deliver come next. The slowest data, the official short interest that exchanges publish twice a month, sits at the bottom. Reading it top to bottom gives you a feel for what is happening right now versus what has built up over time.

Short squeeze score

Updates intraday

Moderate squeeze risk

OABI scores 40 out of 100. The biggest factor is borrow fee at 89.4% (high); days to cover of 6.40 is elevated and a borrow fee near 89.4% is high. Short-side pressure is middling and nothing here points to an imminent squeeze.

Short interest % float4.0%Low

Days to cover6.40Elevated

Borrow fee89.4%High

A relative reading versus other stocks, not a prediction. It weighs short interest, float, days to cover and the cost to borrow into one 0–100 number where 50 is the middle of the pack.

Low

Moderate

Elevated

High

Extreme

40.00

0 · less crowded50 · average100 · most crowded

Short interest over time

NASDAQ · Capital IQ (float)Updates twice monthly

Reported short interest for OABI at each date, shown with days to cover and short interest as a percent of float. Short interest updates twice a month; the percentages are recomputed as float changes.

Date	Short Interest	Days to Cover	SI % Float	Float (MM)	Shares Out (MM)
2026-05-17	—	—	3.98%	97.53	144.97
2026-05-16	—	—	3.98%	97.53	144.97
2026-05-15	—	—	3.98%	97.53	144.97
2026-05-14	—	—	3.98%	97.53	144.97

Short interest (official NASDAQ settlement)

NASDAQUpdates twice monthlyPREVIEW

Placeholder data, not real OABI figures. We are still wiring the official settlement feed, so the numbers below are illustrative sample values used to show the layout. Do not rely on them. This section will switch to live data once the feed lands.

The raw short interest NASDAQ publishes at each settlement date, with the publication date and the change from the prior period. These are the exchange own figures and are not adjusted for stock splits.

Settlement Date	Publication Date	Short Interest	Percent Change	SI Ratio (DTC)	Float (MM)	SI % Float
2026-07-19	2026-07-29	1,524,759	0.00%	13.90	92.66	1.65
2026-07-04	2026-07-14	1,701,925	-11.62%	5.28	93.02	1.83
2026-06-19	2026-06-29	1,653,271	2.86%	11.99	106.27	1.56
2026-06-04	2026-06-14	1,438,281	13.00%	9.65	106.66	1.35
2026-05-20	2026-05-30	1,482,102	-3.05%	12.77	109.59	1.35
2026-05-05	2026-05-15	1,636,718	-10.43%	13.30	110.87	1.48
2026-04-20	2026-04-30	1,780,919	-8.81%	13.11	101.20	1.76
2026-04-05	2026-04-15	2,071,928	-16.34%	8.24	113.62	1.82
2026-03-21	2026-03-31	1,953,151	5.73%	11.03	115.97	1.68
2026-03-06	2026-03-16	2,069,838	-5.97%	11.65	105.16	1.97
2026-02-19	2026-03-01	2,229,310	-7.70%	11.16	103.68	2.15
2026-02-04	2026-02-14	2,350,254	-5.43%	8.92	109.09	2.15

Short sale volume (FINRA)

FINRAUpdates daily at close

How many OABI shares were sold short off exchange each day, summed across the reporting venues we track. It includes market maker hedging and other routine activity, so a high reading is normal and is not the same as outstanding short interest.

Market Date	Non-Exempt Vol	Exempt Vol	Short Vol	Total Vol	Short Vol Ratio
2026-07-27	2,400	0	2,400	2,498	96.1%
2026-07-24	54,754	20	54,774	72,118	76.0%
2026-07-23	52,358	0	52,358	88,307	59.3%
2026-07-22	182,208	0	182,208	431,480	42.2%
2026-07-21	46,693	418	47,111	93,444	50.4%
2026-07-20	122,403	0	122,403	238,799	51.3%
2026-07-17	93,639	0	93,639	170,843	54.8%
2026-07-16	159,149	2,310	161,459	260,298	62.0%
2026-07-15	144,723	0	144,723	258,250	56.0%
2026-07-14	207,867	2	207,869	291,205	71.4%
2026-07-13	192,654	0	192,654	322,186	59.8%
2026-07-10	123,474	0	123,474	184,576	66.9%
2026-07-09	87,762	63	87,825	160,620	54.7%
2026-07-08	264,368	66	264,434	410,822	64.4%
2026-07-07	275,379	5,042	280,421	458,781	61.1%
2026-07-06	117,828	0	117,828	183,671	64.2%
2026-07-02	114,645	0	114,645	193,176	59.3%
2026-07-01	130,012	732	130,744	304,601	42.9%
2026-06-30	198,895	0	198,895	346,950	57.3%
2026-06-29	167,681	3,950	171,631	307,834	55.8%
2026-06-26	125,399	128	125,527	268,460	46.8%
2026-06-25	319,574	1,020	320,594	527,383	60.8%
2026-06-24	148,114	654	148,768	390,426	38.1%
2026-06-23	92,125	0	92,125	253,096	36.4%
2026-06-22	98,677	434	99,111	268,391	36.9%
2026-06-18	191,671	20	191,691	403,393	47.5%
2026-06-17	90,023	0	90,023	322,555	27.9%
2026-06-16	91,035	0	91,035	164,646	55.3%
2026-06-15	93,698	0	93,698	328,504	28.5%
2026-06-12	31,273	598	31,871	128,423	24.8%

Short sale volume (combined exchange and off-exchange)

FINRA, PSX/BXUpdates daily at closePREVIEW

Placeholder data, not real OABI figures. We are still wiring the per-venue combined volume feed, so the numbers below are illustrative sample values used to show the layout. Do not rely on them. This section will switch to live data once the feed lands.

Off-exchange volume combined with the on-exchange venues we track. The aggregate columns cover those venues only, not every place OABI trades, so treat the totals as a representative sample rather than a full market count.

Market Date	FINRA Short	PSX/BX Short	Aggregate Short	Aggregate Total	Agg Short Ratio
2026-07-29	100,236	1,483	101,719	164,081	62.0%
2026-07-28	185,841	2,031	187,872	304,533	61.7%
2026-07-27	86,452	350	86,802	146,490	59.3%
2026-07-24	121,220	1,622	122,842	205,939	59.6%
2026-07-23	144,262	2,140	146,402	237,612	61.6%
2026-07-22	155,757	2,409	158,166	274,241	57.7%
2026-07-21	116,307	162	116,469	192,387	60.5%
2026-07-20	130,078	1,949	132,027	229,791	57.5%
2026-07-17	100,276	505	100,781	174,609	57.7%
2026-07-16	121,138	2,100	123,238	234,389	52.6%

Fails-to-deliver

SECUpdates twice monthly, delayed

OABI shares that did not settle on time, reported by the SEC. Each figure is a running balance on a given date rather than a daily tally, and it is not added up across dates. Fails happen for many ordinary reasons and are not on their own a sign of anything improper.

Settlement Date	Price	Quantity	Value
2026-06-30	$2.57	944	$2,426.08
2026-06-29	$2.52	944	$2,378.88
2026-06-26	$2.51	944	$2,369.44
2026-06-25	$2.28	944	$2,152.32
2026-06-24	$2.33	944	$2,199.52
2026-06-23	$2.32	944	$2,190.08
2026-06-22	$2.34	944	$2,208.96
2026-06-18	$2.03	944	$1,916.32
2026-06-17	$2.02	1,896	$3,829.92
2026-06-16	$2.11	944	$1,991.84
2026-06-15	$2.27	2,105	$4,778.35
2026-06-12	$2.34	1,018	$2,382.12
2026-06-11	$2.38	944	$2,246.72
2026-06-10	$2.40	944	$2,265.60
2026-06-09	$2.28	944	$2,152.32
2026-06-08	$2.48	944	$2,341.12
2026-06-05	$2.66	944	$2,511.04
2026-06-04	$2.50	944	$2,360.00
2026-06-03	$2.62	944	$2,473.28
2026-06-02	$2.61	944	$2,463.84
2026-06-01	$2.70	944	$2,548.80
2026-05-29	$2.72	944	$2,567.68
2026-05-28	$2.59	6,849	$17,738.91
2026-05-27	$2.55	944	$2,407.20

Short shares availability

Prime brokerage sampleUpdates intradayPREVIEW

Placeholder data, not real OABI figures. We are still wiring the share availability feed, so the numbers below are illustrative sample values used to show the layout. Do not rely on them. This section will switch to live data once the feed lands.

How many OABI shares one large prime broker had available to lend at each timestamp. It is a sample of a single lender, not the total shortable pool and not the short interest, but the direction over a day or two is a useful read on demand. Last update 7 minutes ago.

Time Since Last Change	Timestamp (UTC)	OABI Short Shares Availability
42 minutes ago	2026-07-29 02:00 UTC	200,000
2 hours ago	2026-07-29 01:07 UTC	150,000
6 hours ago	2026-07-28 21:14 UTC	100,000
6 hours ago	2026-07-28 21:21 UTC	150,000
7 hours ago	2026-07-28 20:28 UTC	200,000
8 hours ago	2026-07-28 19:35 UTC	250,000
11 hours ago	2026-07-28 16:42 UTC	700
15 hours ago	2026-07-28 12:49 UTC	900
17 hours ago	2026-07-28 10:56 UTC	500
20 hours ago	2026-07-28 07:03 UTC	400

Cost to borrow

Lending feedUpdates intraday

The annualized rate a short seller pays to borrow OABI. The latest reading is 89.35%. A high or rising fee means shares are getting harder and more expensive to short, which is one of the conditions that can feed a squeeze.

Date	Borrow Fee
2026-07-28	89.35%
2026-07-27	92.42%
2026-07-24	89.60%
2026-07-23	90.37%
2026-07-22	91.48%
2026-06-08	53.31%
2026-06-05	53.51%
2026-06-04	53.63%
2026-06-03	54.24%
2026-06-02	54.36%
2026-06-01	54.50%
2026-05-29	54.51%
2026-05-28	54.54%
2026-05-27	54.58%
2026-05-26	54.65%
2026-05-25	54.77%
2026-05-22	54.90%
2026-05-21	55.01%
2026-05-20	55.15%
2026-05-19	55.30%
2026-05-18	55.42%
2026-05-15	55.53%
2026-05-14	55.60%
2026-05-13	55.69%

OABI short interest FAQ

How much of OABI is sold short right now?+

About 1,524,759 shares of OmniAb Inc. are currently sold short, which is roughly 3.98% of the float. At recent trading volume that would take around 6.40 days to buy back. Exchanges publish this figure twice a month, so it moves in steps rather than continuously.

What does the OABI squeeze score mean?+

It is a single reading from 0 to 100, with 50 as the middle of the pack, that blends short interest, float, days to cover, the borrow fee and a few other signals. OABI currently sits at 40.00, which we read as moderate squeeze risk. A higher score means a more crowded setup, not a promise that the stock will squeeze.

Is short volume the same as short interest?+

No, and it is a common mix up. Short interest counts open short positions at a settlement date and updates twice a month. Short volume counts shares traded short on a single day and updates daily. A stock can show heavy short volume from routine market making without its open short interest going up at all.

What are fails to deliver?+

They are shares that did not change hands by the settlement date, reported by the SEC on a delay. The number is a running balance on a given date, not a daily count, so you should not add it up across dates. Fails happen for many ordinary reasons and are not on their own a sign of anything improper.

What does the borrow fee tell me?+

It is the yearly rate a short seller pays to borrow the stock, and OABI is near 89.35% right now. When the fee is high and shares are hard to find, shorting gets expensive and harder to hold, which is one of the ingredients that can feed a squeeze.

How often does this data update?+

It depends on the source. Official short interest lands twice a month, FINRA short volume every trading day, SEC fails to deliver about two weeks late, and borrow figures through the day. Each section on this page shows its own as of date so you can see how fresh it is.

This page is for education and is not investment advice. Short interest, short volume, fails to deliver and borrow figures come from separate reporting systems with different as of dates and methods, and none of them on its own proves any wrongdoing or predicts where the price will go. Numbers can differ from other sites because of how float is measured, when each source reports, which venues are covered, and corporate actions like splits. Always do your own research and talk to a licensed financial advisor before you trade.

Introduction