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Astera Labs, Inc.

ALAB
Exchange
Nasdaq
Industry
Semiconductors & Related Devices
SEC CIK
0001736297

In the last 90 days, Astera Labs, Inc. insiders filed 0 open-market purchases and 7 sales; 997 institutions reported holding it in 13F filings for Q2 2026, worth $61.2B in total; Maverick Capital is the only superinvestor holding 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
7.95M
Shares, settlement Oct 30, 2026
Change
−62.1K
−0.8% vs. Oct 15, 2026
Days to cover
2.16
Short interest ÷ average daily volume
Average daily volume
3.68M
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 10,641,402 sharesNov 15, 2024: 8,909,518 sharesNov 29, 2024: 8,341,303 sharesDec 13, 2024: 8,044,507 sharesDec 31, 2024: 10,061,804 sharesJan 15, 2025: 8,046,067 sharesJan 31, 2025: 7,678,854 sharesFeb 14, 2025: 8,510,641 sharesFeb 28, 2025: 9,551,710 sharesMar 14, 2025: 11,119,748 sharesMar 31, 2025: 10,824,891 sharesApr 15, 2025: 10,193,758 sharesApr 30, 2025: 10,761,874 sharesMay 15, 2025: 10,970,970 sharesMay 30, 2025: 10,657,092 sharesJun 13, 2025: 10,977,921 sharesJun 30, 2025: 11,029,405 sharesJul 15, 2025: 11,165,582 sharesJul 31, 2025: 9,280,319 sharesAug 15, 2025: 8,997,848 sharesAug 29, 2025: 9,206,501 sharesSep 15, 2025: 9,621,313 sharesSep 30, 2025: 8,989,174 sharesOct 15, 2025: 9,260,453 sharesOct 31, 2025: 8,398,986 sharesNov 14, 2025: 10,645,508 sharesNov 28, 2025: 12,081,579 sharesDec 15, 2025: 12,293,014 sharesDec 31, 2025: 11,711,907 sharesJan 15, 2026: 11,139,247 sharesJan 30, 2026: 10,653,797 sharesFeb 13, 2026: 11,632,347 sharesFeb 27, 2026: 10,763,918 sharesMar 13, 2026: 13,516,520 sharesMar 31, 2026: 15,495,055 sharesApr 15, 2026: 14,440,640 sharesApr 30, 2026: 13,125,304 sharesMay 15, 2026: 12,417,409 sharesMay 29, 2026: 11,906,625 sharesJun 15, 2026: 11,511,657 sharesJun 30, 2026: 12,676,294 sharesJul 15, 2026: 9,525,824 sharesJul 31, 2026: 9,109,856 sharesAug 14, 2026: 8,753,228 sharesAug 31, 2026: 9,033,499 sharesSep 15, 2026: 8,685,910 sharesSep 30, 2026: 9,176,900 sharesOct 15, 2026: 8,015,331 sharesOct 30, 2026: 7,953,225 shares
Short interest in ALAB by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20267.95M−62.1K−0.8%3.68M2.16
Oct 15, 20268.02M−1.16M−12.7%4.42M1.81
Sep 30, 20269.18M+491.0K+5.7%4.13M2.22
Sep 15, 20268.69M−347.6K−3.9%3.88M2.24
Aug 31, 20269.03M+280.3K+3.2%3.20M2.83
Aug 14, 20268.75M−356.6K−3.9%4.73M1.85
Jul 31, 20269.11M−416.0K−4.4%4.49M2.03
Jul 15, 20269.53M−3.15M−24.9%4.60M2.07
Jun 30, 202612.7M+1.16M+10.1%7.30M1.74
Jun 15, 202611.5M−395.0K−3.3%5.58M2.06
May 29, 202611.9M−510.8K−4.1%7.03M1.69
May 15, 202612.4M−707.9K−5.4%5.73M2.17
Apr 30, 202613.1M−1.32M−9.1%5.67M2.31
Apr 15, 202614.4M−1.05M−6.8%5.70M2.54
Mar 31, 202615.5M+1.98M+14.6%4.36M3.56
Mar 13, 202613.5M+2.75M+25.6%4.87M2.77
Feb 27, 202610.8M−868.4K−7.5%3.85M2.80
Feb 13, 202611.6M+978.5K+9.2%7.59M1.53
Jan 30, 202610.7M−485.4K−4.4%4.67M2.28
Jan 15, 202611.1M−572.7K−4.9%5.01M2.23
Dec 31, 202511.7M−581.1K−4.7%3.45M3.40
Dec 15, 202512.3M+211.4K+1.8%7.06M1.74
Nov 28, 202512.1M+1.44M+13.5%6.15M1.96
Nov 14, 202510.6M+2.25M+26.8%6.40M1.66
Oct 31, 20258.40M−861.5K−9.3%4.95M1.70
Oct 15, 20259.26M+271.3K+3.0%7.05M1.31
Sep 30, 20258.99M−632.1K−6.6%7.56M1.19
Sep 15, 20259.62M+414.8K+4.5%5.39M1.79
Aug 29, 20259.21M+208.7K+2.3%4.19M2.20
Aug 15, 20259.00M−282.5K−3.0%7.04M1.28
Jul 31, 20259.28M−1.89M−16.9%6.30M1.47
Jul 15, 202511.2M+136.2K+1.2%4.00M2.79
Jun 30, 202511.0M+51.5K+0.5%6.00M1.84
Jun 13, 202511.0M+320.8K+3.0%3.27M3.36
May 30, 202510.7M−313.9K−2.9%4.66M2.29
May 15, 202511.0M+209.1K+1.9%4.84M2.27
Apr 30, 202510.8M+568.1K+5.6%2.57M4.19
Apr 15, 202510.2M−631.1K−5.8%4.62M2.21
Mar 31, 202510.8M−294.9K−2.7%2.94M3.69
Mar 14, 202511.1M+1.57M+16.4%5.25M2.12
Feb 28, 20259.55M+1.04M+12.2%5.60M1.70
Feb 14, 20258.51M+831.8K+10.8%6.60M1.29
Jan 31, 20257.68M−367.2K−4.6%6.38M1.20
Jan 15, 20258.05M−2.02M−20.0%3.18M2.53
Dec 31, 202410.1M+2.02M+25.1%4.82M2.09
Dec 13, 20248.04M−296.8K−3.6%4.13M1.95
Nov 29, 20248.34M−568.2K−6.4%5.64M1.48
Nov 15, 20248.91M−1.73M−16.3%7.36M1.21
Oct 31, 202410.6M+313.5K+3.0%3.10M3.43

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 ALAB by settlement date
Settlement dateSharesPriceValue
Oct 5, 2026500$350.33$175.2K
Sep 30, 20263,282$357.84$1.17M
Sep 29, 20263,562$351.31$1.25M
Sep 28, 202611,647$364.62$4.25M
Sep 24, 20263,497$360.46$1.26M
Sep 22, 202620$340.74$6.81K
Sep 21, 2026448$303.25$135.9K
Sep 18, 2026123$293.56$36.1K
Sep 8, 2026400$310.40$124.2K
Sep 3, 202614$274.13$3.84K
Sep 2, 202622,174$279.91$6.21M
Aug 28, 202684$304.09$25.5K
Aug 27, 2026213$290.30$61.8K
Aug 26, 202622$282.65$6.22K
Aug 24, 20261,024$284.97$291.8K
Aug 14, 202624,226$322.78$7.82M
Aug 11, 202640,683$317.23$12.9M
Aug 10, 202643,973$334.17$14.7M
Aug 5, 20266,312$361.67$2.28M
Aug 4, 202622,147$321.05$7.11M
Jul 29, 202650$260.23$13.0K
Jul 27, 202625$291.58$7.29K
Jul 20, 20262,700$303.62$819.8K
Jul 17, 20261,266$319.74$404.8K
Jul 9, 202669$393.16$27.1K
Jul 8, 2026100$382.89$38.3K
Jul 7, 2026338$432.74$146.3K
Jul 6, 202647,345$406.42$19.2M
Jun 30, 20265,727$455.96$2.61M
Jun 29, 2026423$391.74$165.7K

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 ALAB by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 2026727,3966701,427,11651.0%
Nov 9, 20261,239,2612,3532,492,46149.7%
Nov 6, 20261,221,42454,3532,527,42948.3%
Nov 5, 20262,006,49732,3074,278,79246.9%
Nov 4, 20261,270,34117,9363,223,51139.4%
Nov 3, 2026815,79830,0401,901,62442.9%
Nov 2, 2026926,50222,4061,996,77446.4%
Oct 30, 20261,178,42911,0022,132,06855.3%
Oct 29, 2026710,3893,3541,130,94062.8%
Oct 28, 2026659,03732,2461,303,31150.6%
Oct 27, 2026885,0761,6651,607,29755.1%
Oct 26, 2026632,0342,5091,161,01654.4%
Oct 23, 2026509,39134,335941,31154.1%
Oct 22, 20261,025,48439,4082,066,18749.6%
Oct 21, 2026485,2481,996833,22058.2%
Oct 20, 2026445,82568810,74955.0%
Oct 19, 2026563,3572951,089,03151.7%
Oct 16, 2026753,1762,2331,454,16751.8%
Oct 15, 2026868,3342,0671,651,34352.6%
Oct 14, 2026787,1995321,431,04455.0%
Oct 13, 2026600,14813,5201,215,18849.4%
Oct 12, 2026605,607211,442,06142.0%
Oct 9, 2026755,54882,0781,737,54743.5%
Oct 8, 20261,430,72812,5782,749,44152.0%
Oct 7, 20261,090,8662,8981,919,91356.8%
Oct 6, 20261,992,3082,5013,137,20663.5%
Oct 5, 2026866,87221,2201,396,99462.1%
Oct 2, 20261,076,5761,2431,842,25358.4%
Oct 1, 2026960,2881,5751,586,78260.5%
Sep 30, 2026558,7553471,279,11743.7%

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 ALAB
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 19, 2026T13,506,20885,4912,621,97875,54257.2%
Oct 12, 2026T14,420,446106,3924,017,46688,86452.4%
Oct 5, 2026T16,057,464135,5366,310,091141,17449.0%
Sep 28, 2026T15,025,155120,0043,109,98192,93561.8%
Sep 21, 2026T15,040,392128,1934,030,536111,29855.6%
Sep 14, 2026T15,445,224117,6214,743,795100,23953.4%
Sep 7, 2026T13,584,69794,1422,921,75376,54855.1%
Aug 31, 2026T14,988,795114,9533,028,93484,04662.2%
Aug 24, 2026T12,984,22488,5452,648,27063,76253.0%
Aug 17, 2026T14,990,409128,6095,194,573111,86349.0%
Aug 10, 2026T13,555,715101,2113,299,40085,21851.9%
Aug 3, 2026T17,175,727163,5645,421,045144,84457.0%