ATMU Institutional Ownership & Shareholders
ATMUS FILTRATION TECHNOLOGIE (ATMU) is currently held by 324 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $4.45B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ATMU tracked by InsiderSet, reporting ownership valued at approximately $631.62M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $530.29M, representing an estimated loss of -16.04% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% of the total disclosed ATMU value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Fmr Llc, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in ATMUS FILTRATION TECHNOLOGIE (ATMU).
This page ranks the largest institutional ATMU shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
324
Total Reported Value
$4.45B
Largest Holder
Blackrock, Inc.
Largest Position
$631.62M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
57
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 12,387,072 | $631,616,801 | $530,290,552 | -$101,326,249 | -16.04% | |
| Fmr Llc | 0.01% | 5,316,383 | $271,082,395 | $227,594,356 | -$43,488,039 | -16.04% | |
| Vanguard Portfolio Management Llc | 0.01% | 4,604,869 | $234,802,270 | $197,134,442 | -$37,667,828 | -16.04% | |
| Invesco Ltd. | 0.02% | 4,457,550 | $227,290,474 | $190,827,716 | -$36,462,759 | -16.04% | |
| Price T Rowe Associates Inc | 0.02% | 4,388,256 | $223,758,000 | $187,861,239 | -$35,896,761 | -16.04% | |
| Vanguard Capital Management Llc | 0.00% | 3,609,746 | $184,060,949 | $154,533,226 | -$29,527,723 | -16.04% | |
| State Street Corp | 0.00% | 3,256,278 | $166,037,615 | $139,401,261 | -$26,636,354 | -16.04% | |
| Goldman Sachs Group Inc | 0.02% | 2,903,771 | $148,063,297 | $124,310,437 | -$23,752,860 | -16.04% | |
| Geode Capital Management, Llc | 0.01% | 2,868,271 | $146,271,286 | $122,790,682 | -$23,480,604 | -16.05% | |
| Neuberger Berman Group Llc | 0.08% | 2,420,647 | $123,428,791 | $103,627,898 | -$19,800,893 | -16.04% | |
| T. Rowe Price Investment Management, Inc. | 0.06% | 1,784,618 | $90,998,000 | $76,399,497 | -$14,598,503 | -16.04% | |
| Janus Henderson Group Plc | 0.04% | 1,551,117 | $88,103,810 | $66,403,319 | -$21,700,491 | -24.63% | |
| Channing Capital Management, Llc | 2.03% | 1,725,956 | $88,006,496 | $73,888,176 | -$14,118,320 | -16.04% | |
| Morgan Stanley | 0.00% | 1,618,166 | $82,510,457 | $69,273,686 | -$13,236,771 | -16.04% | |
| First Trust Advisors Lp | 0.05% | 1,586,834 | $80,912,667 | $67,932,364 | -$12,980,303 | -16.04% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,460,934 | $74,493,033 | $62,542,585 | -$11,950,448 | -16.04% | |
| Wellington Management Group Llp | 0.01% | 1,445,763 | $73,719,455 | $61,893,114 | -$11,826,341 | -16.04% | |
| Westwood Holdings Group Inc | 0.54% | 1,397,165 | $71,241,442 | $59,812,634 | -$11,428,808 | -16.04% | |
| Mangrove Partners Im, Llc | 4.06% | 1,211,236 | $61,760,924 | $51,853,013 | -$9,907,911 | -16.04% | |
| Frontier Capital Management Co Llc | 0.55% | 1,157,930 | $59,042,838 | $49,570,983 | -$9,471,855 | -16.04% | |
| Port Capital Llc | 2.15% | 1,034,293 | $52,738,600 | $44,278,083 | -$8,460,517 | -16.04% | |
| Royce & Associates Lp | 0.41% | 995,247 | $50,747,645 | $42,606,524 | -$8,141,121 | -16.04% | |
| Charles Schwab Investment Management Inc | 0.01% | 957,068 | $48,800,897 | $40,972,081 | -$7,828,816 | -16.04% | |
| Nuveen, Llc | 0.01% | 930,518 | $47,447,114 | $39,835,476 | -$7,611,638 | -16.04% | |
| Northern Trust Corp | 0.01% | 852,441 | $43,465,966 | $36,492,999 | -$6,972,967 | -16.04% | |
| Marshall Wace, Llp | 0.03% | 806,251 | $41,110,739 | $34,515,605 | -$6,595,134 | -16.04% | |
| Manufacturers Life Insurance Company, The | 0.03% | 767,841 | $39,152,213 | $32,871,273 | -$6,280,940 | -16.04% | |
| Boston Trust Walden Corp | 0.28% | 709,764 | $36,190,867 | $30,384,997 | -$5,805,870 | -16.04% | |
| Silvercrest Asset Management Group Llc | 0.23% | 702,658 | $35,828,728 | $30,080,789 | -$5,747,939 | -16.04% | |
| Woodline Partners Lp | 0.10% | 607,471 | $30,974,946 | $26,005,834 | -$4,969,112 | -16.04% | |
| Vanguard Fiduciary Trust Co | 0.01% | 583,865 | $29,771,276 | $24,995,261 | -$4,776,015 | -16.04% | |
| Bank Of New York Mellon Corp | 0.00% | 578,864 | $29,516,260 | $24,781,168 | -$4,735,092 | -16.04% | |
| Teacher Retirement System Of Texas | 0.07% | 533,685 | $27,212,598 | $22,847,055 | -$4,365,543 | -16.04% | |
| Aberdeen Group Plc | 0.04% | 521,724 | $26,602,707 | $22,335,004 | -$4,267,703 | -16.04% | |
| Boston Partners | 0.02% | 494,688 | $25,283,004 | $21,177,593 | -$4,105,411 | -16.24% | |
| Raymond James Financial Inc | 0.01% | 493,314 | $25,154,082 | $21,118,772 | -$4,035,310 | -16.04% | |
| Bank Of America Corp | 0.00% | 484,705 | $24,715,108 | $20,750,221 | -$3,964,887 | -16.04% | |
| Principal Financial Group Inc | 0.01% | 482,392 | $24,597,169 | $20,651,202 | -$3,945,967 | -16.04% | |
| D. E. Shaw & Co., Inc. | 0.02% | 482,029 | $24,578,659 | $20,635,661 | -$3,942,998 | -16.04% | |
| Federated Hermes, Inc. | 0.04% | 478,265 | $24,386,733 | $20,474,525 | -$3,912,208 | -16.04% | |
| New York State Common Retirement Fund | 0.03% | 457,331 | $23,319,308 | $19,578,340 | -$3,740,968 | -16.04% | |
| William Blair Investment Management, Llc | 0.06% | 405,168 | $20,659,516 | $17,345,242 | -$3,314,274 | -16.04% | |
| Massachusetts Financial Services Co | 0.01% | 403,485 | $20,573,700 | $17,273,193 | -$3,300,507 | -16.04% | |
| Ameriprise Financial Inc | 0.00% | 401,126 | $20,452,698 | $17,172,204 | -$3,280,494 | -16.04% | |
| Nomura Asset Management International Inc. | 0.03% | 395,982 | $20,191,000 | $16,951,989 | -$3,239,011 | -16.04% | |
| Gw&K Investment Management, Llc | 0.16% | 390,392 | $19,906,000 | $16,712,682 | -$3,193,318 | -16.04% | |
| Jpmorgan Chase & Co | 0.00% | 387,641 | $19,802,894 | $16,594,911 | -$3,207,983 | -16.20% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 383,637 | $19,561,651 | $16,423,500 | -$3,138,151 | -16.04% | |
| Victory Capital Management Inc | 0.01% | 378,117 | $19,280,186 | $16,187,189 | -$3,092,997 | -16.04% | |
| Ubs Group Ag | 0.00% | 372,005 | $18,968,535 | $15,925,534 | -$3,043,001 | -16.04% |
Frequently asked questions about ATMU
Who are the largest institutional holders of ATMU?
The largest institutional holders of ATMU reported in the latest SEC Form 13F filings include Blackrock, Inc., Fmr Llc, Vanguard Portfolio Management Llc, Invesco Ltd., and Price T Rowe Associates Inc. InsiderSet ranks institutional holders by their latest reported ATMU position.
What is ATMU institutional ownership?
This page tracks ATMU positions reported by institutional investment managers through SEC Form 13F. ATMUS FILTRATION TECHNOLOGIE (ATMU) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ATMU?
InsiderSet currently tracks 324 institutional managers reporting ATMU holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ATMU shareholders.
How much ATMU stock do institutions own?
Institutional investment managers disclosed approximately $4.45B in ATMU holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ATMU institutional ownership last updated?
The latest ATMU institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ATMU holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ATMU position after the reporting date.
Are institutions buying or selling ATMU?
Institutional buying and selling can be analyzed by comparing ATMU positions across consecutive 13F reporting periods. InsiderSet's ATMU Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ATMU ownership changes.
How has ATMU institutional ownership changed over time?
InsiderSet tracks ATMU institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.