Skip to main content
Livermore
Livermore
US stocksTW
ZHEN

Inogen Inc

INGN
Exchange
Nasdaq
Industry
Orthopedic, Prosthetic & Surgical Appliances & Supplies
SEC CIK
0001294133

No open-market purchases or sales by Inogen Inc insiders were filed in the last 90 days; 129 institutions reported holding it in 13F filings for Q2 2026, worth $124.3M 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
1.40M
Shares, settlement Oct 30, 2026
Change
−127.7K
−8.3% vs. Oct 15, 2026
Days to cover
5.76
Short interest ÷ average daily volume
Average daily volume
243.7K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 826,339 sharesNov 15, 2024: 744,771 sharesNov 29, 2024: 794,734 sharesDec 13, 2024: 761,266 sharesDec 31, 2024: 714,199 sharesJan 15, 2025: 733,987 sharesJan 31, 2025: 798,636 sharesFeb 14, 2025: 665,892 sharesFeb 28, 2025: 746,977 sharesMar 14, 2025: 790,036 sharesMar 31, 2025: 662,853 sharesApr 15, 2025: 910,821 sharesApr 30, 2025: 1,031,648 sharesMay 15, 2025: 1,101,915 sharesMay 30, 2025: 1,093,979 sharesJun 13, 2025: 1,083,442 sharesJun 30, 2025: 1,013,543 sharesJul 15, 2025: 986,556 sharesJul 31, 2025: 892,304 sharesAug 15, 2025: 1,049,106 sharesAug 29, 2025: 891,968 sharesSep 15, 2025: 768,019 sharesSep 30, 2025: 731,926 sharesOct 15, 2025: 732,184 sharesOct 31, 2025: 684,907 sharesNov 14, 2025: 730,930 sharesNov 28, 2025: 752,242 sharesDec 15, 2025: 765,525 sharesDec 31, 2025: 715,422 sharesJan 15, 2026: 771,568 sharesJan 30, 2026: 818,449 sharesFeb 13, 2026: 973,130 sharesFeb 27, 2026: 1,208,558 sharesMar 13, 2026: 1,164,300 sharesMar 31, 2026: 1,120,713 sharesApr 15, 2026: 997,966 sharesApr 30, 2026: 1,050,105 sharesMay 15, 2026: 802,083 sharesMay 29, 2026: 943,489 sharesJun 15, 2026: 892,604 sharesJun 30, 2026: 1,026,490 sharesJul 15, 2026: 1,053,270 sharesJul 31, 2026: 1,258,451 sharesAug 14, 2026: 1,438,520 sharesAug 31, 2026: 1,462,458 sharesSep 15, 2026: 1,366,129 sharesSep 30, 2026: 1,473,603 sharesOct 15, 2026: 1,530,789 sharesOct 30, 2026: 1,403,057 shares
Short interest in INGN by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20261.40M−127.7K−8.3%243.7K5.76
Oct 15, 20261.53M+57.2K+3.9%373.6K4.10
Sep 30, 20261.47M+107.5K+7.9%404.1K3.65
Sep 15, 20261.37M−96.3K−6.6%265.7K5.14
Aug 31, 20261.46M+23.9K+1.7%225.2K6.49
Aug 14, 20261.44M+180.1K+14.3%293.5K4.90
Jul 31, 20261.26M+205.2K+19.5%200.6K6.27
Jul 15, 20261.05M+26.8K+2.6%201.0K5.24
Jun 30, 20261.03M+133.9K+15.0%278.3K3.69
Jun 15, 2026892.6K−50.9K−5.4%385.7K2.31
May 29, 2026943.5K+141.4K+17.6%339.1K2.78
May 15, 2026802.1K−248.0K−23.6%386.7K2.07
Apr 30, 20261.05M+52.1K+5.2%315.2K3.33
Apr 15, 2026998.0K−122.7K−11.0%293.9K3.40
Mar 31, 20261.12M−43.6K−3.7%204.2K5.49
Mar 13, 20261.16M−44.3K−3.7%322.1K3.61
Feb 27, 20261.21M+235.4K+24.2%322.8K3.74
Feb 13, 2026973.1K+154.7K+18.9%267.2K3.64
Jan 30, 2026818.4K+46.9K+6.1%208.5K3.93
Jan 15, 2026771.6K+56.1K+7.9%227.6K3.39
Dec 31, 2025715.4K−50.1K−6.5%131.8K5.43
Dec 15, 2025765.5K+13.3K+1.8%172.1K4.45
Nov 28, 2025752.2K+21.3K+2.9%199.6K3.77
Nov 14, 2025730.9K+46.0K+6.7%232.8K3.14
Oct 31, 2025684.9K−47.3K−6.5%145.6K4.70
Oct 15, 2025732.2K+2580.0%152.6K4.80
Sep 30, 2025731.9K−36.1K−4.7%209.3K3.50
Sep 15, 2025768.0K−123.9K−13.9%209.7K3.66
Aug 29, 2025892.0K−157.1K−15.0%164.2K5.43
Aug 15, 20251.05M+156.8K+17.6%351.0K2.99
Jul 31, 2025892.3K−94.3K−9.6%200.9K4.44
Jul 15, 2025986.6K−27.0K−2.7%144.0K6.85
Jun 30, 20251.01M−69.9K−6.5%257.9K3.93
Jun 13, 20251.08M−10.5K−1.0%152.7K7.10
May 30, 20251.09M−7.94K−0.7%249.0K4.39
May 15, 20251.10M+70.3K+6.8%354.6K3.11
Apr 30, 20251.03M+120.8K+13.3%200.4K5.15
Apr 15, 2025910.8K+248.0K+37.4%381.4K2.39
Mar 31, 2025662.9K−127.2K−16.1%310.8K2.13
Mar 14, 2025790.0K+43.1K+5.8%358.6K2.20
Feb 28, 2025747.0K+81.1K+12.2%477.2K1.57
Feb 14, 2025665.9K−132.7K−16.6%255.4K2.61
Jan 31, 2025798.6K+64.6K+8.8%300.4K2.66
Jan 15, 2025734.0K+19.8K+2.8%193.8K3.79
Dec 31, 2024714.2K−47.1K−6.2%168.1K4.25
Dec 13, 2024761.3K−33.5K−4.2%164.0K4.64
Nov 29, 2024794.7K+50.0K+6.7%188.2K4.22
Nov 15, 2024744.8K−81.6K−9.9%285.1K2.61
Oct 31, 2024826.3K−106.2K−11.4%136.0K6.08

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 INGN by settlement date
Settlement dateSharesPriceValue
Oct 7, 2026734$5.77$4.24K
Sep 10, 2026278$5.27$1.47K
Aug 27, 202615,156$5.56$84.3K
Aug 25, 202620$5.50$110
Aug 17, 20261,933$5.75$11.1K
Aug 11, 20263,094$6.02$18.6K
Aug 5, 2026483$6.92$3.34K
Aug 3, 20263,327$6.45$21.5K
Jul 10, 20261,385$6.53$9.04K
Jun 18, 20261,496$6.37$9.53K
Jun 11, 20263,132$6.59$20.6K
Jun 10, 20262,891$6.35$18.4K
Jun 9, 2026606$6.06$3.67K
Jun 5, 2026254$6.31$1.60K
May 19, 202668$6.30$428.4
Mar 23, 2026347$6.10$2.12K
Mar 19, 20261,367$6.13$8.38K
Mar 16, 202615$6.06$90.9
Mar 5, 20261$6.31$6.31
Feb 26, 202616,405$6.01$98.6K
Feb 3, 2026175$6.00$1.05K
Feb 2, 20262,675$5.90$15.8K
Sep 22, 20251,000$8.66$8.66K
Sep 17, 2025262$8.50$2.23K
Sep 15, 20255,909$8.54$50.5K
Aug 28, 2025221$7.93$1.75K
Aug 15, 202524$7.67$184.08
Jul 1, 20251,123$7.03$7.89K
Jun 24, 20251$6.67$6.67
May 27, 2025721$6.53$4.71K

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 INGN by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 13, 202632,0221289,06636.0%
Nov 12, 202620,516079,41025.8%
Nov 11, 202639,1860111,63535.1%
Nov 10, 202620,097071,72628.0%
Nov 9, 202642,432291107,94839.3%
Nov 6, 2026153,74221,641303,01250.7%
Nov 5, 202647,414078,05760.7%
Nov 4, 202644,4410120,97636.7%
Nov 3, 202632,62442560,95753.5%
Nov 2, 202632,862081,74040.2%
Oct 30, 202636,563171,44551.2%
Oct 29, 202652,07910093,94555.4%
Oct 28, 202631,088277,66440.0%
Oct 27, 202627,09320569,72138.9%
Oct 26, 202630,028072,79041.3%
Oct 23, 202634,877081,47642.8%
Oct 22, 202648,7450175,40527.8%
Oct 21, 202632,334057,41756.3%
Oct 20, 202624,1945264,01637.8%
Oct 19, 202638,20810098,40538.8%
Oct 16, 202623,760056,94141.7%
Oct 15, 202620,435056,54636.1%
Oct 14, 202637,689090,70841.5%
Oct 13, 202637,5480115,82632.4%
Oct 12, 202635,838091,12739.3%
Oct 9, 202639,87360079,01950.5%
Oct 8, 202643,0320120,22735.8%
Oct 7, 202617,662057,89130.5%
Oct 6, 202661,71911109,73356.2%
Oct 5, 202650,7090140,97136.0%

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 INGN
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2347,2357,821168,8642,33667.3%
Sep 28, 2026T2421,6578,683438,5532,82549.0%
Sep 21, 2026T2488,0349,548407,4712,05554.5%
Sep 14, 2026T2462,6306,833272,1782,39963.0%
Sep 7, 2026T2191,1706,631192,2282,01249.9%
Aug 31, 2026T2221,9236,423319,7912,08341.0%
Aug 24, 2026T2186,8765,555244,0411,89643.4%
Aug 17, 2026T2180,5226,904208,8801,78446.4%
Aug 10, 2026T2275,4858,606203,8552,06057.5%
Aug 3, 2026T2318,3359,267365,2912,45646.6%
Jul 27, 2026T2140,3737,789134,4221,58051.1%
Jul 20, 2026T2259,1678,157148,6571,38863.5%