ATMUS FILTRATION TECHNOLOGIE ATMU
COM · Common Stock · CUSIP 04956D107
- SectorConsumer discretionary
- IndustryMotor Vehicle Parts & Accessories
- HeadquartersNashville, TN
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($10.3m this quarter). Holder counts are more reliable. Shares outstanding: 81.7m as of 2026-04-27, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $56.79. Options: 3 managers hold calls ($1.8m notional), 1 hold puts ($340.6k).
Trends to Q1 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q2 2023 | 68 |
| Q3 2023 | 83 |
| Q4 2023 | 94 |
| Q1 2024 | 231 |
| Q2 2024 | 238 |
| Q3 2024 | 283 |
| Q4 2024 | 288 |
| Q1 2025 | 278 |
| Q2 2025 | 280 |
| Q3 2025 | 291 |
| Q4 2025 | 312 |
| Q1 2026 | 351 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2024 | 143 | 124 |
| Q3 2024 | 152 | 118 |
| Q4 2024 | 126 | 134 |
| Q1 2025 | 133 | 135 |
| Q2 2025 | 130 | 137 |
| Q3 2025 | 128 | 146 |
| Q4 2025 | 160 | 132 |
| Q1 2026 | 185 | 130 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2025 | $6.7m | $25.3k | 0.00 |
| Q3 2025 | $24.3m | $2.4m | 0.10 |
| Q4 2025 | $27.4m | $882.5k | 0.03 |
| Q1 2026 | $1.8m | $340.6k | 0.19 |
Biggest buyers
| NEUBERGER BERMAN GROUP LLC | Added | +1.2m |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Added | +659.4k |
| Invesco Ltd. | Added | +615.4k |
| FMR LLC | Added | +518.0k |
| JANE STREET GROUP, LLC | Added | +416.5k |
| Qube Research & Technologies Ltd | Added | +407.0k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Added | +401.3k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | New | +284.2k |
| BANK OF AMERICA CORP /DE/ | Added | +225.6k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +216.4k |
Biggest sellers
| EMINENCE CAPITAL, LP | Reduced | -2.5m |
| Allspring Global Investments Holdings, LLC | Reduced | -483.3k |
| Assenagon Asset Management S.A. | Reduced | -452.7k |
| Parsifal Capital Management, LP | Reduced | -445.3k |
| MORGAN STANLEY | Reduced | -386.4k |
| Medina Value Partners, LLC | Reduced | -285.8k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Reduced | -255.9k |
| Channing Capital Management, LLC | Reduced | -243.0k |
| MARSHALL WACE, LLP | Reduced | -242.1k |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | -216.1k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $965.1k17.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $488.2k8.6k shares |
| IMC-Chicago, LLC | Reduced | $346.3k6.1k shares |
Biggest puts
| CITADEL ADVISORS LLC | Reduced | $340.6k6.0k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2026-05-06 | 14.2% |
| FMR LLC 13G · institution +1.1 pts · filed 2026-08-06 | 6.5% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-07-31 | 5.7% |
| PRICE T ROWE ASSOCIATES INC /MD/ 13G · institution +3.2 pts · filed 2026-02-17 | 5.7% |
| Invesco Ltd. 13G · institution new · filed 2026-08-13 | 5.5% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.1% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC), EMINENCE CAPITAL, LP (4.7%, 2026-02-17)
Insider purchases and sales in Q1 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 2 | $460.4k | 0 | — | — |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 1 | $1.5k | — |
| Q3 2025 | 1 | $1.8k | 0 | — | — |
| Q4 2025 | 0 | — | 1 | $977 | — |
| Q1 2026 | 0 | — | 0 | — | — |
None reported in Q1 2026.
Holders, Q1 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 6.8m $386.7m | Added +40.3k |
| FMR LLC 0.01% of their portfolio | 4.9m $280.3m | Added +518.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.03% of their portfolio | 4.5m $254.7m | Reduced -191.2k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 3.7m $209.5m | First filing |
| VANGUARD CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 3.6m $202.5m | First filing |
| Invesco Ltd. 0.02% of their portfolio | 3.3m $189.8m | Added +615.4k |
| GOLDMAN SACHS GROUP INC 0.02% of their portfolio | 3.3m $186.8m | Added +88.8k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 2.6m $150.2m | Added +216.4k |
| FIRST TRUST ADVISORS LP 0.09% of their portfolio | 2.2m $125.1m | Added +70.9k |
| STATE STREET CORP 0.00% of their portfolio | 1.9m $107.6m | Reduced -6.6k |
| MORGAN STANLEY 0.01% of their portfolio | 1.7m $98.6m | Reduced -386.4k |
| D. E. Shaw & Co., Inc. 0.07% of their portfolio | 1.6m $92.0m | Added +176.8k |
| T. Rowe Price Investment Management, Inc. 0.06% of their portfolio | 1.6m $89.7m | Reduced -96.6k |
| JANUS HENDERSON GROUP PLC 0.04% of their portfolio | 1.6m $88.1m | Added +181.8k |
| Nuveen, LLC 0.02% of their portfolio | 1.4m $82.0m | Added +134.3k |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 1.4m $78.7m | Reduced -216.1k |
| Channing Capital Management, LLC 2.01% of their portfolio | 1.4m $78.7m | Reduced -243.0k |
| MANGROVE PARTNERS IM, LLC 6.05% of their portfolio | 1.3m $74.7m | Unchanged |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 1.3m $74.0m | Added +45.1k |
| EMINENCE CAPITAL, LP 1.67% of their portfolio | 1.3m $72.8m | Reduced -2.5m |
| WESTWOOD HOLDINGS GROUP INC 0.51% of their portfolio | 1.2m $70.3m | Reduced -142.3k |
| NEUBERGER BERMAN GROUP LLC 0.05% of their portfolio | 1.2m $66.7m | Added +1.2m |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.03% of their portfolio | 999.5k $56.7m | Added +659.4k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 940.6k $53.4m | Added +4.8k |
| Port Capital LLC 2.29% of their portfolio | 908.7k $51.6m | Added +32.0k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 893.6k $50.7m | Added +225.6k |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 821.7k $45.2m | Reduced -43.8k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.02% of their portfolio | 818.9k $50.3m | Reduced -58.6k |
| Parsifal Capital Management, LP 5.78% of their portfolio | 789.0k $44.8m | Reduced -445.3k |
| ROYCE & ASSOCIATES LP 0.44% of their portfolio | 777.7k $44.2m | Added +109.9k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.04% of their portfolio | 758.8k $43.1m | Reduced -10.9k |
| Boston Trust Walden Corp 0.35% of their portfolio | 750.6k $42.6m | Reduced -102.9k |
| FRONTIER CAPITAL MANAGEMENT CO LLC 0.43% of their portfolio | 742.2k $42.1m | Added +88.7k |
| Qube Research & Technologies Ltd 0.06% of their portfolio | 741.2k $42.1m | Added +407.0k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.30% of their portfolio | 740.6k $42.0m | Reduced -10.0k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 726.5k $41.2m | Added +9.8k |
| VANGUARD FIDUCIARY TRUST CO 0.01% of their portfolio | 564.2k $32.0m | First filing |
| ALGERT GLOBAL LLC 0.44% of their portfolio | 514.9k $29.2m | Reduced -55.0k |
| FEDERATED HERMES, INC. 0.04% of their portfolio | 487.3k $27.7m | Added +74.3k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 481.5k $26.4m | Added +157.4k |
| TEACHER RETIREMENT SYSTEM OF TEXAS 0.11% of their portfolio | 474.4k $26.9m | Reduced -116.3k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.04% of their portfolio | 454.6k $25.8m | Added +401.3k |
| GW&K Investment Management, LLC 0.22% of their portfolio | 439.2k $24.9m | Reduced -43.5k |
| JANE STREET GROUP, LLC 0.03% of their portfolio | 426.6k $24.2m | Added +416.5k |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.08% of their portfolio | 426.1k $24.2m | Reduced -255.9k |
| UBS Group AG 0.00% of their portfolio | 381.7k $21.7m | Added +48.0k |
| Aberdeen Group plc 0.03% of their portfolio | 372.8k $21.2m | Reduced -27.9k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.03% of their portfolio | 362.2k $20.6m | Reduced -47.1k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 359.7k $20.4m | Added +8.6k |
| Woodline Partners LP 0.08% of their portfolio | 355.9k $20.2m | Added +98.7k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.02% of their portfolio | 339.1k $19.2m | Reduced -104.9k |
| MARSHALL WACE, LLP 0.02% of their portfolio | 322.6k $18.3m | Reduced -242.1k |
| BARCLAYS PLC 0.01% of their portfolio | 308.7k $17.5m | Added +165.0k |
| LOOMIS SAYLES & CO L P 0.02% of their portfolio | 292.4k $16.6m | Reduced -59.6k |
| Schonfeld Strategic Advisors LLC 0.13% of their portfolio | 286.7k $16.3m | Reduced -79.4k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.03% of their portfolio | 284.2k $16.1m | New |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 283.4k $16.1m | Added +215.9k |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 282.3k $16.0m | Reduced -18.6k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.33% of their portfolio | 275.2k $15.6m | Reduced -68.6k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 265.9k $15.1m | Reduced -62.0k |
| Allspring Global Investments Holdings, LLC 0.03% of their portfolio | 257.3k $15.0m | Reduced -483.3k |
| ALTRINSIC GLOBAL ADVISORS LLC 0.48% of their portfolio | 234.7k $13.3m | Reduced -12.5k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 230.5k $13.1m | Added +33.2k |
| Medina Value Partners, LLC 2.69% of their portfolio | 226.4k $12.9m | Reduced -285.8k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 208.5k $11.8m | Reduced -68.5k |
| PANAGORA ASSET MANAGEMENT INC 0.04% of their portfolio | 204.2k $11.6m | Added +29.1k |
| AXIOM INVESTORS LLC /DE 0.13% of their portfolio | 203.7k $11.6m | Reduced -21.1k |
| Ancora Advisors LLC 0.25% of their portfolio | 203.3k $11.5m | Reduced -172.3k |
| Assenagon Asset Management S.A. 0.02% of their portfolio | 181.9k $10.3m | Reduced -452.7k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.04% of their portfolio | 167.6k $9.5m | Reduced -132.7k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 164.2k $9.3m | Added +62.0k |
| Swiss National Bank 0.01% of their portfolio | 161.2k $9.2m | Reduced -800 |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 161.1k $9.1m | Added +32.5k |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC 0.03% of their portfolio | 158.0k $9.0m | Reduced -133.1k |
| Vest Financial, LLC 0.10% of their portfolio | 145.9k $8.3m | Added +5.9k |
| ACADIAN ASSET MANAGEMENT LLC 0.01% of their portfolio | 139.7k $7.9m | Added +104.1k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 133.9k $7.6m | Added +3.3k |
| PRUDENTIAL FINANCIAL INC 0.01% of their portfolio | 130.0k $7.4m | Reduced -22.5k |
| OP Asset Management Ltd 0.07% of their portfolio | 122.3k $6.9m | Added +85.0k |
| Tidal Investments LLC 0.02% of their portfolio | 120.6k $6.8m | New |
| CASTLEARK MANAGEMENT LLC 0.22% of their portfolio | 119.3k $6.8m | New |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 118.6k $6.7m | Added +840 |
| DARK FOREST CAPITAL MANAGEMENT LP 0.59% of their portfolio | 116.3k $6.6m | Reduced -35.7k |
| BAR HARBOR WEALTH MANAGEMENT 0.38% of their portfolio | 115.6k $6.6m | Added +2.9k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 115.5k $6.6m | Reduced -63.3k |
| Susquehanna Portfolio Strategies, LLC 0.10% of their portfolio | 114.7k $6.5m | Unchanged |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 110.2k $6.3m | Added +18.6k |
| PRENTISS SMITH & CO INC 3.52% of their portfolio | 106.7k $6.1m | Reduced -30 |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 104.7k $5.9m | Reduced -1.1k |
| Livforsakringsbolaget Skandia, Omsesidigt 0.23% of their portfolio | 103.5k $5.9m | Added +9.3k |
| Tema ETFs LLC 0.39% of their portfolio | 102.0k $5.8m | Added +12.1k |
| Jefferies Financial Group Inc. 0.07% of their portfolio | 100.5k $5.7m | Added +74.2k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 97.5k $5.5m | Added +18.9k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 95.5k $5.0m | Added +7.0k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 93.4k $5.3m | Added +28.4k |
| Moody Aldrich Partners LLC 0.94% of their portfolio | 92.1k $5.2m | Reduced -987 |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 86.0k $4.9m | Added +78.8k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 82.3k $4.7m | Added +2.7k |
| ExodusPoint Capital Management, LP 0.05% of their portfolio | 81.8k $4.6m | Added +59.7k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio | 78.3k $4.4m | Reduced -4.9k |