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 Mar 31, 2025
Ownership Breakdown
282
Institutional Holders
▼ 10 vs Q4
$3.06B
Total Inst. Value
▼ $211.52M vs Q4
81.67M
Shares Outstanding
freeFloat 99.12%
83.40M
13F Shares Held
▼ 205,391 vs Q4
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
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC motor vehicle parts & accessories | 8.17M | 9.87% | 9.87% | $300.07B | May 9, 2025 | ▼ 139.8K |
BLACKROCK, INC. motor vehicle parts & accessories | 7.07M | 8.54% | 8.54% | $259.70B | May 2, 2025 | ▲ 540.6K |
EMINENCE CAPITAL, LP motor vehicle parts & accessories | 5.76M | 6.95% | 6.95% | $211.46B | May 15, 2025 | ▲ 1.16M |
FMR LLC motor vehicle parts & accessories | 4.13M | 4.99% | 4.99% | $151.61B | May 12, 2025 | ▲ 855.8K |
GOLDMAN SACHS GROUP INC motor vehicle parts & accessories | 3.00M | 3.63% | 3.63% | $110.36B | Jun 27, 2025 | ▼ 343.2K |
WELLINGTON MANAGEMENT GROUP LLP motor vehicle parts & accessories | 2.43M | 2.93% | 2.93% | $89.09B | May 13, 2025 | ▲ 478.0K |
MORGAN STANLEY motor vehicle parts & accessories | 2.37M | 2.86% | 2.86% | $87.05B | May 15, 2025 | ▼ 93.6K |
INVESCO LTD. motor vehicle parts & accessories | 2.16M | 2.61% | 2.61% | $79.26B | May 12, 2025 | ▲ 990.5K |
PRICE T ROWE ASSOCIATES INC /MD/ motor vehicle parts & accessories | 2.12M | 2.56% | 2.56% | $77.99B | May 14, 2025 | ▼ 2.14M |
D. E. SHAW & CO., INC. motor vehicle parts & accessories | 2.08M | 2.51% | 2.51% | $76.31B | May 15, 2025 | ▲ 166.4K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
27
Increased
+7.78M shares2
New Positions
first time holders20
Decreased
−5.56M shares0
Sold Out
fully exitedNet shares change (top 50)
+2.22M
+7.78M / −5.56M
Net new holders
+9
2 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 8.17 million shares — equal to 9.87% of outstanding shares — as of March 31, 2025.
A total of 282 institutional investors currently hold ATMU stock, with a combined institutional value of approximately $3.06 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 9.87% stake. Company insiders hold 0.88%. Data sourced from SEC Form 13F as of March 31, 2025.