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Opko Health, Inc.

OPK
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0000944809

In the last 90 days, Opko Health, Inc. insiders filed 0 open-market purchases and 1 sale; 223 institutions reported holding it in 13F filings for Q2 2026, worth $303.4M in total; no superinvestor holds it.

Four kinds of short-selling data, each measuring something different:

  • Short interest: shares sold short and not yet bought back, as of a settlement date. FINRA publishes it twice a month, about eight business days after the settlement date.
  • Daily short volume: shares sold short each day in off-exchange trades reported to FINRA. It counts trades, not open positions, and is published the next day.
  • Fails-to-deliver: shares not delivered by the settlement date. The SEC publishes them twice a month, about two weeks late.
  • ATS (dark pool) volume: weekly volume on alternative trading systems and other off-exchange venues. FINRA publishes it two to four weeks after the week.

More in the glossary.

Short interest

Shares sold short and not yet bought back, from FINRA, on every settlement date in the last two years.

Short interest
32.8M
Shares, settlement Oct 30, 2026
Change
−1.16M
−3.4% vs. Oct 15, 2026
Days to cover
9.23
Short interest ÷ average daily volume
Average daily volume
3.56M
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 95,861,930 sharesNov 15, 2024: 95,640,258 sharesNov 29, 2024: 98,565,253 sharesDec 13, 2024: 84,800,882 sharesDec 31, 2024: 91,327,219 sharesJan 15, 2025: 87,917,595 sharesJan 31, 2025: 88,641,089 sharesFeb 14, 2025: 88,626,421 sharesFeb 28, 2025: 89,471,671 sharesMar 14, 2025: 111,000,485 sharesMar 31, 2025: 116,494,002 sharesApr 15, 2025: 34,956,354 sharesApr 30, 2025: 34,891,409 sharesMay 15, 2025: 34,038,935 sharesMay 30, 2025: 31,662,082 sharesJun 13, 2025: 30,996,173 sharesJun 30, 2025: 34,139,928 sharesJul 15, 2025: 32,409,499 sharesJul 31, 2025: 32,768,192 sharesAug 15, 2025: 33,043,499 sharesAug 29, 2025: 32,466,072 sharesSep 15, 2025: 32,890,467 sharesSep 30, 2025: 33,683,158 sharesOct 15, 2025: 33,372,771 sharesOct 31, 2025: 32,755,482 sharesNov 14, 2025: 33,814,574 sharesNov 28, 2025: 31,424,789 sharesDec 15, 2025: 32,577,197 sharesDec 31, 2025: 30,340,574 sharesJan 15, 2026: 30,515,491 sharesJan 30, 2026: 30,881,465 sharesFeb 13, 2026: 31,677,429 sharesFeb 27, 2026: 31,374,396 sharesMar 13, 2026: 32,776,490 sharesMar 31, 2026: 33,615,361 sharesApr 15, 2026: 32,978,308 sharesApr 30, 2026: 33,763,628 sharesMay 15, 2026: 32,656,834 sharesMay 29, 2026: 33,037,706 sharesJun 15, 2026: 32,789,842 sharesJun 30, 2026: 32,594,765 sharesJul 15, 2026: 33,644,789 sharesJul 31, 2026: 32,883,700 sharesAug 14, 2026: 33,649,355 sharesAug 31, 2026: 34,558,372 sharesSep 15, 2026: 35,987,629 sharesSep 30, 2026: 35,560,259 sharesOct 15, 2026: 34,009,478 sharesOct 30, 2026: 32,849,261 shares
Short interest in OPK by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 202632.8M−1.16M−3.4%3.56M9.23
Oct 15, 202634.0M−1.55M−4.4%6.47M5.26
Sep 30, 202635.6M−427.4K−1.2%2.38M14.94
Sep 15, 202636.0M+1.43M+4.1%3.41M10.55
Aug 31, 202634.6M+909.0K+2.7%2.51M13.77
Aug 14, 202633.6M+765.7K+2.3%2.72M12.37
Jul 31, 202632.9M−761.1K−2.3%6.10M5.39
Jul 15, 202633.6M+1.05M+3.2%2.60M12.96
Jun 30, 202632.6M−195.1K−0.6%3.65M8.93
Jun 15, 202632.8M−247.9K−0.8%2.77M11.84
May 29, 202633.0M+380.9K+1.2%3.03M10.91
May 15, 202632.7M−1.11M−3.3%1.97M16.54
Apr 30, 202633.8M+785.3K+2.4%2.66M12.69
Apr 15, 202633.0M−637.1K−1.9%1.86M17.69
Mar 31, 202633.6M+838.9K+2.6%3.08M10.91
Mar 13, 202632.8M+1.40M+4.5%2.28M14.38
Feb 27, 202631.4M−303.0K−1.0%1.77M17.73
Feb 13, 202631.7M+796.0K+2.6%2.89M10.95
Jan 30, 202630.9M+366.0K+1.2%3.68M8.38
Jan 15, 202630.5M+174.9K+0.6%3.13M9.75
Dec 31, 202530.3M−2.24M−6.9%4.24M7.16
Dec 15, 202532.6M+1.15M+3.7%3.01M10.82
Nov 28, 202531.4M−2.39M−7.1%2.87M10.96
Nov 14, 202533.8M+1.06M+3.2%2.72M12.43
Oct 31, 202532.8M−617.3K−1.9%1.83M17.94
Oct 15, 202533.4M−310.4K−0.9%1.65M20.27
Sep 30, 202533.7M+792.7K+2.4%3.20M10.54
Sep 15, 202532.9M+424.4K+1.3%1.97M16.73
Aug 29, 202532.5M−577.4K−1.8%1.95M16.63
Aug 15, 202533.0M+275.3K+0.8%3.15M10.50
Jul 31, 202532.8M+358.7K+1.1%2.79M11.73
Jul 15, 202532.4M−1.73M−5.1%2.04M15.89
Jun 30, 202534.1M+3.14M+10.1%4.68M7.30
Jun 13, 202531.0M−665.9K−2.1%2.51M12.34
May 30, 202531.7M−2.38M−7.0%2.62M12.08
May 15, 202534.0M−852.5K−2.4%4.36M7.81
Apr 30, 202534.9M−64.9K−0.2%2.47M14.10
Apr 15, 202535.0M−81.5M−70.0%4.47M7.82
Mar 31, 2025116.5M+5.49M+5.0%3.39M34.36
Mar 14, 2025111.0M+21.5M+24.1%12.3M9.05
Feb 28, 202589.5M+845.3K+1.0%4.59M19.48
Feb 14, 202588.6M−14.7K0.0%3.26M27.19
Jan 31, 202588.6M+723.5K+0.8%2.03M43.66
Jan 15, 202587.9M−3.41M−3.7%3.05M28.86
Dec 31, 202491.3M+6.53M+7.7%3.53M25.85
Dec 13, 202484.8M−13.8M−14.0%4.91M17.28
Nov 29, 202498.6M+2.92M+3.1%4.57M21.55
Nov 15, 202495.6M−221.7K−0.2%4.86M19.68
Oct 31, 202495.9M+2.92M+3.2%2.90M33.01

Fails-to-deliver

Shares that weren't delivered by the settlement date, from the SEC, for the last 30 dates with fails. The price is the previous day's closing price published by the SEC.

Fails-to-deliver in OPK by settlement date
Settlement dateSharesPriceValue
Oct 13, 2026374$1.38$516.12
Oct 8, 202621,536$1.39$29.9K
Oct 7, 202619,534$1.46$28.5K
Oct 6, 202619,535$1.57$30.7K
Oct 5, 202619,515$1.56$30.4K
Oct 2, 202619,514$1.57$30.6K
Oct 1, 202619,588$1.61$31.5K
Sep 30, 202619,588$1.62$31.7K
Sep 29, 202624,581$1.63$40.1K
Sep 28, 202624,587$1.64$40.3K
Sep 25, 202623,979$1.64$39.3K
Sep 24, 202623,988$1.70$40.8K
Sep 23, 202623,988$1.73$41.5K
Sep 21, 20263,401$1.67$5.68K
Sep 14, 20263,327$1.57$5.22K
Sep 9, 2026845$1.59$1.34K
Sep 2, 20265,585$1.52$8.49K
Aug 31, 202613,881$1.48$20.5K
Aug 27, 2026260$1.51$392.6
Aug 26, 20261$1.49$1.49
Aug 25, 202617$1.48$25.16
Aug 24, 202616,132$1.48$23.9K
Aug 14, 20263,157$1.40$4.42K
Aug 13, 20263,674$1.39$5.11K
Aug 12, 20263,396$1.39$4.72K
Aug 11, 20263,396$1.39$4.72K
Aug 10, 20266,396$1.37$8.76K
Aug 7, 2026100,573$1.32$132.8K
Aug 6, 20268,651$1.35$11.7K
Aug 5, 20262,878$1.31$3.77K

Daily short volume

Off-exchange short-sale volume, not short interest: shares sold short each day in trades reported to FINRA, for the last 30 trading days.

The short volume ratio isn't a sentiment gauge: market makers sell short to fill buy orders and to hedge, so short sales are usually about half of off-exchange volume.

Off-exchange short volume in OPK by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 2026637,8942,4081,258,12850.7%
Nov 9, 2026670,571301,382,65848.5%
Nov 6, 20261,618,0183042,336,94669.2%
Nov 5, 20261,730,03570,8153,532,56049.0%
Nov 4, 20261,076,7781,8001,803,83859.7%
Nov 3, 20261,126,23801,776,83563.4%
Nov 2, 2026769,18601,439,78353.4%
Oct 30, 2026535,619141,012,50252.9%
Oct 29, 2026513,589601861,10759.6%
Oct 28, 2026401,8943,228922,55343.6%
Oct 27, 2026645,72120,1501,235,54252.3%
Oct 26, 2026376,905307796,26247.3%
Oct 23, 2026396,9252,098731,64754.3%
Oct 22, 2026597,6764,399994,12160.1%
Oct 21, 2026684,5409021,286,41553.2%
Oct 20, 2026935,86812,106,16244.4%
Oct 19, 20261,391,29786,4392,043,02068.1%
Oct 16, 20263,107,28930,2875,288,87658.8%
Oct 15, 202610,207,81494,03119,014,52753.7%
Oct 14, 2026334,1770697,02147.9%
Oct 13, 2026242,578400681,83435.6%
Oct 12, 2026210,9023500,42342.1%
Oct 9, 2026115,6320412,71228.0%
Oct 8, 2026418,47116,400863,15048.5%
Oct 7, 2026259,3764,900860,51030.1%
Oct 6, 2026456,51912,2791,032,20944.2%
Oct 5, 2026372,245200745,24149.9%
Oct 2, 2026368,5971,000628,93358.6%
Oct 1, 2026559,5713001,128,44149.6%
Sep 30, 2026348,076501982,59435.4%

ATS (dark pool) volume

Weekly volume on alternative trading systems (ATS) and other off-exchange (OTC) venues, from FINRA, for the last 12 weeks. ATS share is ATS volume ÷ (ATS + OTC volume), not a share of all trading.

Weekly ATS and OTC volume in OPK
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T21,514,88112,4652,499,82812,51437.7%
Sep 28, 2026T21,634,78815,1602,937,51011,23835.8%
Sep 21, 2026T21,368,35312,6893,989,34711,89725.5%
Sep 14, 2026T21,355,17012,4543,328,19112,00128.9%
Sep 7, 2026T21,032,11310,8633,470,27813,33322.9%
Aug 31, 2026T22,675,26917,4306,665,40613,46028.6%
Aug 24, 2026T21,887,25515,4703,868,43020,90532.8%
Aug 17, 2026T21,823,95618,4383,766,47510,84132.6%
Aug 10, 2026T21,704,09313,6492,979,2428,58236.4%
Aug 3, 2026T22,373,77514,8994,625,47012,57933.9%
Jul 27, 2026T26,096,27225,04422,857,76544,52821.1%
Jul 20, 2026T22,433,64317,6614,628,40215,17634.5%