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Atmus Filtration Technologies ATMU

US equityMarket cap rank #2313Auto Parts
$46.18 +$0.48 (+1.05%)
Pre-market · Oct 6, 4:10 am ET · After hours $46.18 0.00%
Open$45.63
Prev close$45.70
Day range$45.13 – $46.57
Volume734.1K
Market cap$3.77B
P/E (TTM)17.7
Dividend yield0.48%

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership109.5%-0.40 pts vs. prior quarter
Institutions holding405-6 vs. prior quarter
Insider trades (recent)33 buys / 16 sellsNet buying
Short interest3.78% of floatDays to cover 5.1 · as of 15 Sep 2026
Short-sale volume share22.5%5-day average of daily volume

Short-sale volume as % of daily volume

13%20%28%35%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$2.34M (9 inflow days, 11 outflow days).

The five largest holders on file together own 40.1% of shares outstanding.

Largest holders

  • BlackRock15.18%
  • T. Rowe Price Group, Inc.7.57%
  • FMR6.51%
  • Vanguard Portfolio Management, LLC5.64%
  • Invesco Ltd.5.19%
  • Vanguard Capital Management, LLC5.14%
  • State Street Global Advisors3.99%
  • Geode Capital Management, LLC3.52%

By investor type

  • Mutual Fund97.47%
  • Hedge Fund5.06%
  • Public Company3.18%
  • Government Pension Fund2.66%
  • Individual/Insider0.80%
  • Private Company0.62%
  • Insurance Company0.35%
  • Sovereign Wealth Fund0.09%

Reported short interest has fallen from 4.16% to 3.78% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 3,087,685 3.8% 5.1
31 Aug 2026 3,807,016 4.7% 7.3
14 Aug 2026 3,050,905 3.7% 3.4
31 Jul 2026 2,907,077 3.6% 5.4
15 Jul 2026 2,964,034 3.6% 5.0
30 Jun 2026 3,393,791 4.2% 3.0

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