Atmus Filtration Technologies Inc.
Atmus Filtration Technologies Inc. (ATMU) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ATMU · as of Sep 30, 2025
Ownership Breakdown
301
Institutional Holders
▲ 23 vs Q2
$3.73B
Total Inst. Value
▲ $695.34M vs Q2
81.67M
Shares Outstanding
freeFloat 99.12%
82.80M
13F Shares Held
▼ 562,995 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ATMU largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC motor vehicle parts & accessories | 7.97M | 9.67% | 9.67% | $359.57B | Nov 7, 2025 | ▼ 170.7K |
BLACKROCK, INC. motor vehicle parts & accessories | 6.66M | 8.07% | 8.07% | $300.34B | Nov 12, 2025 | ▼ 78.0K |
EMINENCE CAPITAL, LP motor vehicle parts & accessories | 6.52M | 7.91% | 7.91% | $294.10B | Nov 14, 2025 | ▲ 73.4K |
PRICE T ROWE ASSOCIATES INC /MD/ motor vehicle parts & accessories | 4.08M | 4.95% | 4.95% | $184.03B | Nov 14, 2025 | ▲ 1.97M |
FMR LLC motor vehicle parts & accessories | 3.50M | 4.25% | 4.25% | $157.93B | Nov 13, 2025 | ▼ 479.7K |
GOLDMAN SACHS GROUP INC motor vehicle parts & accessories | 3.04M | 3.68% | 3.68% | $136.92B | Nov 14, 2025 | ▲ 70.5K |
GEODE CAPITAL MANAGEMENT, LLC motor vehicle parts & accessories | 2.37M | 2.88% | 2.88% | $107.07B | Nov 12, 2025 | ▲ 8.9K |
MORGAN STANLEY motor vehicle parts & accessories | 2.32M | 2.81% | 2.81% | $104.47B | May 27, 2026 | ▼ 147.5K |
INVESCO LTD. motor vehicle parts & accessories | 2.22M | 2.70% | 2.70% | $100.27B | Nov 13, 2025 | ▲ 34.1K |
WELLINGTON MANAGEMENT GROUP LLP motor vehicle parts & accessories | 2.22M | 2.69% | 2.69% | $100.05B | Nov 14, 2025 | ▼ 414.4K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
24
Increased
+7.26M shares1
New Positions
first time holders25
Decreased
−4.00M shares0
Sold Out
fully exitedNet shares change (top 50)
+3.25M
+7.26M / −4.00M
Net new holders
+0
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ATMU insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
16
Buy transactions
4
Sell transactions
4.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Swan Renee Chief People Officer | Jun 1, 2026 | Sale | 2,566 | $45.25 | $116.1K | 50.7K | Form 4 ↗ |
Masters Charles Senior Vice President | Jun 1, 2026 | Sale | 2,890 | $45.25 | $130.8K | 43.6K | Form 4 ↗ |
Kienzler Jack Chief Financial Officer | Jun 1, 2026 | Sale | 5,132 | $45.25 | $232.2K | 75.8K | Form 4 ↗ |
Disher Stephanie Chief Executive Officer | Jun 1, 2026 | Sale | 25,652 | $45.25 | $1.16M | 363.0K | Form 4 ↗ |
Carpenter Kevin N SVP-Chief Supply Chain Officer | May 12, 2026 | Award | 28,509 | — | — | 28.5K | Form 4 ↗ |
Sharp Heath director | May 12, 2026 | Award | 2,619 | — | — | 5.7K | Form 4 ↗ |
Macadam Stephen E. director | May 12, 2026 | Award | 2,619 | — | — | 38.6K | Form 4 ↗ |
Leipold Jane A director | May 12, 2026 | Award | 2,619 | — | — | 20.5K | Form 4 ↗ |
TAYLOR STUART A II director | May 12, 2026 | Award | 2,619 | — | — | 11.7K | Form 4 ↗ |
Donoso Diego director | May 12, 2026 | Award | 2,619 | — | — | 11.7K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Atmus Filtration Technologies Inc. (ATMU) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 0.88%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Atmus Filtration Technologies Inc. is VANGUARD GROUP INC, holding approximately 7.97 million shares — equal to 9.67% of outstanding shares — as of September 30, 2025.
A total of 301 institutional investors currently hold ATMU stock, with a combined institutional value of approximately $3.73 billion as of the most recent 13F filing period.
Frequently asked questions
ATMU ownershipAtmus Filtration Technologies Inc. (ATMU) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is VANGUARD GROUP INC with a 9.67% stake. Company insiders hold 0.88%. Data sourced from SEC Form 13F as of September 30, 2025.