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Alarm.com Holdings, Inc.

ALRM
Exchange
Nasdaq
Industry
Services-Prepackaged Software
SEC CIK
0001459200

In the last 90 days, Alarm.com Holdings, Inc. insiders filed 0 open-market purchases and 2 sales; 316 institutions reported holding it in 13F filings for Q2 2026, worth $2.27B 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
3.48M
Shares, settlement Oct 30, 2026
Change
+381.4K
+12.3% vs. Oct 15, 2026
Days to cover
6.29
Short interest ÷ average daily volume
Average daily volume
553.0K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 2,343,267 sharesNov 15, 2024: 2,363,069 sharesNov 29, 2024: 2,194,730 sharesDec 13, 2024: 2,402,904 sharesDec 31, 2024: 2,349,553 sharesJan 15, 2025: 2,326,838 sharesJan 31, 2025: 2,306,383 sharesFeb 14, 2025: 2,339,571 sharesFeb 28, 2025: 2,272,636 sharesMar 14, 2025: 2,448,857 sharesMar 31, 2025: 2,293,763 sharesApr 15, 2025: 2,256,293 sharesApr 30, 2025: 1,836,126 sharesMay 15, 2025: 1,884,877 sharesMay 30, 2025: 1,957,966 sharesJun 13, 2025: 2,053,791 sharesJun 30, 2025: 1,981,322 sharesJul 15, 2025: 2,042,583 sharesJul 31, 2025: 2,120,251 sharesAug 15, 2025: 2,275,790 sharesAug 29, 2025: 2,432,593 sharesSep 15, 2025: 2,436,050 sharesSep 30, 2025: 2,383,535 sharesOct 15, 2025: 2,465,095 sharesOct 31, 2025: 2,386,240 sharesNov 14, 2025: 2,252,463 sharesNov 28, 2025: 2,185,445 sharesDec 15, 2025: 2,171,449 sharesDec 31, 2025: 2,247,761 sharesJan 15, 2026: 2,411,536 sharesJan 30, 2026: 2,203,546 sharesFeb 13, 2026: 2,534,809 sharesFeb 27, 2026: 2,289,014 sharesMar 13, 2026: 2,471,128 sharesMar 31, 2026: 2,360,846 sharesApr 15, 2026: 2,295,934 sharesApr 30, 2026: 2,505,835 sharesMay 15, 2026: 2,509,905 sharesMay 29, 2026: 2,582,478 sharesJun 15, 2026: 2,525,828 sharesJun 30, 2026: 2,742,299 sharesJul 15, 2026: 2,566,578 sharesJul 31, 2026: 2,597,657 sharesAug 14, 2026: 2,727,976 sharesAug 31, 2026: 2,793,058 sharesSep 15, 2026: 2,955,286 sharesSep 30, 2026: 3,047,905 sharesOct 15, 2026: 3,096,633 sharesOct 30, 2026: 3,478,082 shares
Short interest in ALRM by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20263.48M+381.4K+12.3%553.0K6.29
Oct 15, 20263.10M+48.7K+1.6%427.6K7.24
Sep 30, 20263.05M+92.6K+3.1%516.1K5.91
Sep 15, 20262.96M+162.2K+5.8%403.2K7.33
Aug 31, 20262.79M+65.1K+2.4%342.1K8.16
Aug 14, 20262.73M+130.3K+5.0%394.9K6.91
Jul 31, 20262.60M+31.1K+1.2%411.9K6.31
Jul 15, 20262.57M−175.7K−6.4%446.7K5.75
Jun 30, 20262.74M+216.5K+8.6%806.1K3.40
Jun 15, 20262.53M−56.6K−2.2%511.7K4.94
May 29, 20262.58M+72.6K+2.9%453.5K5.70
May 15, 20262.51M+4.07K+0.2%524.6K4.78
Apr 30, 20262.51M+209.9K+9.1%441.6K5.68
Apr 15, 20262.30M−64.9K−2.8%471.3K4.87
Mar 31, 20262.36M−110.3K−4.5%432.0K5.47
Mar 13, 20262.47M+182.1K+8.0%428.0K5.77
Feb 27, 20262.29M−245.8K−9.7%596.8K3.84
Feb 13, 20262.53M+331.3K+15.0%460.4K5.51
Jan 30, 20262.20M−208.0K−8.6%366.9K6.01
Jan 15, 20262.41M+163.8K+7.3%326.4K7.39
Dec 31, 20252.25M+76.3K+3.5%368.3K6.10
Dec 15, 20252.17M−14.0K−0.6%400.4K5.42
Nov 28, 20252.19M−67.0K−3.0%483.0K4.52
Nov 14, 20252.25M−133.8K−5.6%376.3K5.99
Oct 31, 20252.39M−78.9K−3.2%309.0K7.72
Oct 15, 20252.47M+81.6K+3.4%339.0K7.27
Sep 30, 20252.38M−52.5K−2.2%609.1K3.91
Sep 15, 20252.44M+3.46K+0.1%312.4K7.80
Aug 29, 20252.43M+156.8K+6.9%321.9K7.56
Aug 15, 20252.28M+155.5K+7.3%475.5K4.79
Jul 31, 20252.12M+77.7K+3.8%272.9K7.77
Jul 15, 20252.04M+61.3K+3.1%264.3K7.73
Jun 30, 20251.98M−72.5K−3.5%350.6K5.65
Jun 13, 20252.05M+95.8K+4.9%315.2K6.52
May 30, 20251.96M+73.1K+3.9%297.0K6.59
May 15, 20251.88M+48.8K+2.7%397.2K4.75
Apr 30, 20251.84M−420.2K−18.6%307.0K5.98
Apr 15, 20252.26M−37.5K−1.6%466.9K4.83
Mar 31, 20252.29M−155.1K−6.3%360.3K6.37
Mar 14, 20252.45M+176.2K+7.8%412.3K5.94
Feb 28, 20252.27M−66.9K−2.9%508.8K4.47
Feb 14, 20252.34M+33.2K+1.4%283.5K8.25
Jan 31, 20252.31M−20.5K−0.9%230.8K9.99
Jan 15, 20252.33M−22.7K−1.0%296.4K7.85
Dec 31, 20242.35M−53.4K−2.2%420.6K5.59
Dec 13, 20242.40M+208.2K+9.5%466.8K5.15
Nov 29, 20242.19M−168.3K−7.1%363.5K6.04
Nov 15, 20242.36M+19.8K+0.9%528.9K4.47
Oct 31, 20242.34M+150.2K+6.9%297.9K7.87

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 ALRM by settlement date
Settlement dateSharesPriceValue
Oct 5, 20263$54.68$164.04
Sep 10, 20265,508$54.99$302.9K
Sep 8, 202693$56.48$5.25K
Sep 4, 202624$56.73$1.36K
Aug 18, 202683$55.00$4.57K
Aug 17, 20268$55.57$444.56
Aug 13, 2026926$55.46$51.4K
Aug 10, 2026556$57.53$32.0K
Aug 5, 2026886$55.87$49.5K
Aug 4, 20261,027$55.54$57.0K
Jul 31, 202651$54.22$2.77K
Jul 29, 202617$54.51$926.67
Jul 16, 202628$52.25$1.46K
Jul 9, 202624$50.99$1.22K
Jul 7, 2026160$49.87$7.98K
Jul 6, 202611,050$49.69$549.1K
Jun 25, 202636$44.47$1.60K
Jun 17, 2026154$45.98$7.08K
Jun 15, 2026304$46.65$14.2K
May 19, 2026101$43.83$4.43K
May 12, 202624$43.72$1.05K
May 11, 2026137$47.60$6.52K
May 4, 2026367$47.13$17.3K
Apr 23, 2026413$46.27$19.1K
Apr 20, 2026567$46.51$26.4K
Apr 13, 2026112$42.65$4.78K
Apr 9, 2026135$44.69$6.03K
Apr 6, 202635$43.67$1.53K
Apr 2, 20265$43.30$216.5
Mar 27, 2026276$43.21$11.9K

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 ALRM by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 13, 202665,823386130,99450.2%
Nov 12, 202637,094073,67650.3%
Nov 11, 202662,5450144,46143.3%
Nov 10, 202671,1891,516135,36952.6%
Nov 9, 2026174,29527228,37276.3%
Nov 6, 2026108,7612196,60155.3%
Nov 5, 2026127,8130207,89961.5%
Nov 4, 2026183,4997224,38281.8%
Nov 3, 202694,1344139,53667.5%
Nov 2, 2026165,83711259,39763.9%
Oct 30, 2026199,685559277,09272.1%
Oct 29, 2026173,4191,063251,58168.9%
Oct 28, 2026155,2630242,08364.1%
Oct 27, 202696,9820135,75371.4%
Oct 26, 2026163,2660207,75378.6%
Oct 23, 2026215,6190293,58873.4%
Oct 22, 2026299,4560391,68276.5%
Oct 21, 2026132,3377174,56875.8%
Oct 20, 202665,282091,61471.3%
Oct 19, 2026100,6520154,68865.1%
Oct 16, 202682,2670137,54659.8%
Oct 15, 202689,646683224,46139.9%
Oct 14, 202691,3401,003188,47648.5%
Oct 13, 202657,4700113,69850.5%
Oct 12, 202656,470291,72761.6%
Oct 9, 202653,339094,16856.6%
Oct 8, 202689,2923129,69568.8%
Oct 7, 2026139,6201265,92152.5%
Oct 6, 202653,808189,53160.1%
Oct 5, 202692,1800147,48762.5%

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 ALRM
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2613,78521,387271,7333,21069.3%
Sep 28, 2026T2417,36519,007909,1963,19331.5%
Sep 21, 2026T2528,57920,991522,4433,46250.3%
Sep 14, 2026T2727,58028,157674,3073,76251.9%
Sep 7, 2026T2445,96918,703361,6852,52555.2%
Aug 31, 2026T2489,48723,447358,3283,59757.7%
Aug 24, 2026T2454,36121,869175,3484,22672.2%
Aug 17, 2026T2455,57122,921266,2613,98063.1%
Aug 10, 2026T2578,93221,899179,1724,33276.4%
Aug 3, 2026T2657,73826,638192,6095,43577.3%
Jul 27, 2026T2552,75720,900262,8423,68967.8%
Jul 20, 2026T2473,20920,919190,1973,65471.3%