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Affiliated Managers Group, Inc.

MGR
Exchange
NYSE
Industry
Investment Advice
SEC CIK
0001004434

No open-market purchases or sales by Affiliated Managers Group, Inc. insiders were filed in the last 90 days; 2 institutions reported holding it in 13F filings for Q2 2026, worth $12.8K in total; no superinvestor holds it.

Other share classesAMGMGRBMGRDMGRE

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
4.98K
Shares, settlement Oct 30, 2026
Change
−5.45K
−52.2% vs. Oct 15, 2026
Days to cover
1.00
Short interest ÷ average daily volume
Average daily volume
32.5K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 75,127 sharesNov 15, 2024: 68,898 sharesNov 29, 2024: 64,759 sharesDec 13, 2024: 41,012 sharesDec 31, 2024: 46,722 sharesJan 15, 2025: 49,515 sharesJan 31, 2025: 70,081 sharesFeb 14, 2025: 54,445 sharesFeb 28, 2025: 32,261 sharesMar 14, 2025: 23,456 sharesMar 31, 2025: 16,405 sharesApr 15, 2025: 10,266 sharesApr 30, 2025: 10,557 sharesMay 15, 2025: 2,996 sharesMay 30, 2025: 6,244 sharesJun 13, 2025: 4,299 sharesJun 30, 2025: 5,339 sharesJul 15, 2025: 12,409 sharesJul 31, 2025: 7,773 sharesAug 15, 2025: 2,707 sharesAug 29, 2025: 10,309 sharesSep 15, 2025: 6,072 sharesSep 30, 2025: 14,364 sharesOct 15, 2025: 9,881 sharesOct 31, 2025: 13,618 sharesNov 14, 2025: 21,982 sharesNov 28, 2025: 15,132 sharesDec 15, 2025: 1,311 sharesDec 31, 2025: 1,341 sharesJan 15, 2026: 9,579 sharesJan 30, 2026: 16,198 sharesFeb 13, 2026: 15,579 sharesFeb 27, 2026: 14,532 sharesMar 13, 2026: 7,472 sharesMar 31, 2026: 11,149 sharesApr 15, 2026: 4,152 sharesApr 30, 2026: 2,567 sharesMay 15, 2026: 10,082 sharesMay 29, 2026: 3,698 sharesJun 15, 2026: 2,657 sharesJun 30, 2026: 16,020 sharesJul 15, 2026: 28,789 sharesJul 31, 2026: 12,714 sharesAug 14, 2026: 15,140 sharesAug 31, 2026: 1,720 sharesSep 15, 2026: 11,699 sharesSep 30, 2026: 51,533 sharesOct 15, 2026: 10,431 sharesOct 30, 2026: 4,982 shares
Short interest in MGR by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20264.98K−5.45K−52.2%32.5K1.00
Oct 15, 202610.4K−41.1K−79.8%33.9K1.00
Sep 30, 202651.5K+39.8K+340.5%37.5K1.37
Sep 15, 202611.7K+9.98K+580.2%48.4K1.00
Aug 31, 20261.72K−13.4K−88.6%30.0K1.00
Aug 14, 202615.1K+2.43K+19.1%16.9K1.00
Jul 31, 202612.7K−16.1K−55.8%19.5K1.00
Jul 15, 202628.8K+12.8K+79.7%38.4K1.00
Jun 30, 202616.0K+13.4K+502.9%47.1K1.00
Jun 15, 20262.66K−1.04K−28.2%28.7K1.00
May 29, 20263.70K−6.38K−63.3%27.4K1.00
May 15, 202610.1K+7.51K+292.8%15.9K1.00
Apr 30, 20262.57K−1.58K−38.2%15.7K1.00
Apr 15, 20264.15K−7.00K−62.8%17.4K1.00
Mar 31, 202611.1K+3.68K+49.2%25.7K1.00
Mar 13, 20267.47K−7.06K−48.6%26.0K1.00
Feb 27, 202614.5K−1.05K−6.7%24.0K1.00
Feb 13, 202615.6K−619−3.8%19.4K1.00
Jan 30, 202616.2K+6.62K+69.1%16.3K1.00
Jan 15, 20269.58K+8.24K+614.3%21.1K1.00
Dec 31, 20251.34K+30+2.3%33.3K1.00
Dec 15, 20251.31K−13.8K−91.3%42.1K1.00
Nov 28, 202515.1K−6.85K−31.2%16.2K1.00
Nov 14, 202522.0K+8.36K+61.4%23.1K1.00
Oct 31, 202513.6K+3.74K+37.8%17.1K1.00
Oct 15, 20259.88K−4.48K−31.2%28.5K1.00
Sep 30, 202514.4K+8.29K+136.6%23.6K1.00
Sep 15, 20256.07K−4.24K−41.1%18.4K1.00
Aug 29, 202510.3K+7.60K+280.8%26.8K1.00
Aug 15, 20252.71K−5.07K−65.2%24.9K1.00
Jul 31, 20257.77K−4.64K−37.4%23.0K1.00
Jul 15, 202512.4K+7.07K+132.4%38.4K1.00
Jun 30, 20255.34K+1.04K+24.2%28.7K1.00
Jun 13, 20254.30K−1.95K−31.2%19.0K1.00
May 30, 20256.24K+3.25K+108.4%20.6K1.00
May 15, 20253.00K−7.56K−71.6%15.8K1.00
Apr 30, 202510.6K+291+2.8%21.3K1.00
Apr 15, 202510.3K−6.14K−37.4%29.8K1.00
Mar 31, 202516.4K−7.05K−30.1%32.4K1.00
Mar 14, 202523.5K−8.80K−27.3%21.6K1.09
Feb 28, 202532.3K−22.2K−40.8%17.2K1.88
Feb 14, 202554.4K−15.6K−22.3%13.0K4.19
Jan 31, 202570.1K+20.6K+41.5%19.9K3.52
Jan 15, 202549.5K+2.79K+6.0%24.3K2.04
Dec 31, 202446.7K+5.71K+13.9%45.4K1.03
Dec 13, 202441.0K−23.7K−36.7%31.5K1.30
Nov 29, 202464.8K−4.14K−6.0%31.2K2.08
Nov 15, 202468.9K−6.23K−8.3%19.8K3.48
Oct 31, 202475.1K+36.3K+93.5%27.4K2.74

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 MGR by settlement date
Settlement dateSharesPriceValue
Oct 14, 2026552$18.80$10.4K
Oct 9, 2026717$18.74$13.4K
Oct 7, 2026820$18.83$15.4K
Oct 2, 202615$19.10$286.5
Oct 1, 2026996$19.09$19.0K
Sep 29, 202636$19.65$707.4
Sep 28, 20261,233$19.66$24.2K
Sep 25, 20261,856$19.72$36.6K
Sep 24, 2026860$19.57$16.8K
Sep 23, 2026294$19.49$5.73K
Sep 22, 2026221$19.68$4.35K
Sep 14, 202638$19.83$753.54
Sep 8, 2026992$19.65$19.5K
Sep 3, 202620$19.39$387.8
Sep 2, 20261,119$19.30$21.6K
Sep 1, 20261,320$19.40$25.6K
Aug 25, 2026525$19.64$10.3K
Aug 20, 20262,492$19.79$49.3K
Aug 12, 202621$20.05$421.05
Aug 11, 2026235$19.99$4.70K
Aug 10, 2026100$20.09$2.01K
Jul 28, 2026259$20.18$5.23K
Jul 27, 202639$20.15$785.85
Jul 24, 202696$20.15$1.93K
Jul 23, 202616$20.20$323.2
Jul 16, 2026492$20.69$10.2K
Jul 15, 2026944$20.47$19.3K
Jul 14, 20261,070$20.36$21.8K
Jul 13, 2026123$20.13$2.48K
Jul 10, 2026200$19.95$3.99K

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 MGR by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 12, 20262,444014,07717.4%
Nov 11, 20262,531011,90921.3%
Nov 10, 20265,647022,75224.8%
Nov 9, 20264,189021,58819.4%
Nov 6, 20266,038021,96427.5%
Nov 5, 20266,204054,25011.4%
Nov 4, 202610,520029,06736.2%
Nov 3, 20266,45748920,58831.4%
Nov 2, 20267,11552415,47846.0%
Oct 30, 20267,23622816,76543.2%
Oct 29, 20264,578017,67825.9%
Oct 28, 20265,23731220,03026.1%
Oct 27, 20264,55314615,01730.3%
Oct 26, 20266,92314417,50839.5%
Oct 23, 20266,514015,28542.6%
Oct 22, 202620,87520028,40073.5%
Oct 21, 202611,38338021,70952.4%
Oct 20, 20263,1873611,10128.7%
Oct 19, 202610,8501,05422,53948.1%
Oct 16, 202616,524023,63569.9%
Oct 15, 20262,76212214,07119.6%
Oct 14, 20267,99335134,27923.3%
Oct 13, 20267,152013,15554.4%
Oct 12, 202615,2331,71127,19256.0%
Oct 9, 20266,21463915,44340.2%
Oct 8, 20266,492019,31933.6%
Oct 7, 20266,08617614,07143.3%
Oct 6, 20262,598011,07323.5%
Oct 5, 202628,810040,55771.0%
Oct 2, 202611,79818033,51135.2%

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 MGR
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T26,190107101,5268965.7%
Sep 28, 2026T218,68285681,45292018.7%
Sep 21, 2026T215,634172142,9759069.9%
Sep 14, 2026T216,55014789,18690115.7%
Sep 7, 2026T213,85711582,32362914.4%
Aug 31, 2026T214,525234180,4008027.5%
Aug 24, 2026T23,91515451,7067037.0%
Aug 17, 2026T26,26917675,6687827.7%
Aug 10, 2026T22,8346151,1926645.2%
Aug 3, 2026T21,5134339,8536993.7%
Jul 27, 2026T29,63647945,66872217.4%
Jul 20, 2026T25,63712651,2999609.9%