ATMUS FILTRATION TECHNOLOGIE (ATMU) Institutional Shareholders
ATMUS FILTRATION TECHNOLOGIE (ATMU) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $4.45B in ATMU holdings during the latest filing period.
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 $543.67M, representing an estimated loss of -13.92% 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
325
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
62
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 | $543,668,590 | -$87,948,211 | -13.92% | |
| Fmr Llc | 0.01% | 5,316,383 | $271,082,395 | $233,336,050 | -$37,746,345 | -13.92% | |
| Vanguard Portfolio Management Llc | 0.01% | 4,604,869 | $234,802,270 | $202,107,700 | -$32,694,570 | -13.92% | |
| Invesco Ltd. | 0.02% | 4,457,550 | $227,290,474 | $195,641,870 | -$31,648,605 | -13.92% | |
| Price T Rowe Associates Inc | 0.02% | 4,388,256 | $223,758,000 | $192,600,556 | -$31,157,444 | -13.92% | |
| Vanguard Capital Management Llc | 0.00% | 3,609,746 | $184,060,949 | $158,431,752 | -$25,629,197 | -13.92% | |
| State Street Corp | 0.00% | 3,256,278 | $166,037,615 | $142,918,041 | -$23,119,574 | -13.92% | |
| Goldman Sachs Group Inc | 0.02% | 2,903,771 | $148,063,297 | $127,446,509 | -$20,616,788 | -13.92% | |
| Geode Capital Management, Llc | 0.01% | 2,868,271 | $146,271,286 | $125,888,414 | -$20,382,872 | -13.93% | |
| Neuberger Berman Group Llc | 0.08% | 2,420,647 | $123,428,791 | $106,242,197 | -$17,186,594 | -13.92% | |
| T. Rowe Price Investment Management, Inc. | 0.06% | 1,784,618 | $90,998,000 | $78,326,884 | -$12,671,116 | -13.92% | |
| Janus Henderson Group Plc | 0.04% | 1,551,117 | $88,103,810 | $68,078,525 | -$20,025,285 | -22.73% | |
| Channing Capital Management, Llc | 2.03% | 1,725,956 | $88,006,496 | $75,752,209 | -$12,254,287 | -13.92% | |
| Morgan Stanley | 0.00% | 1,618,166 | $82,510,457 | $71,021,306 | -$11,489,151 | -13.92% | |
| First Trust Advisors Lp | 0.05% | 1,586,834 | $80,912,667 | $69,646,144 | -$11,266,523 | -13.92% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,460,934 | $74,493,033 | $64,120,393 | -$10,372,640 | -13.92% | |
| Wellington Management Group Llp | 0.01% | 1,445,763 | $73,719,455 | $63,454,538 | -$10,264,917 | -13.92% | |
| Westwood Holdings Group Inc | 0.54% | 1,397,165 | $71,241,442 | $61,321,572 | -$9,919,870 | -13.92% | |
| Mangrove Partners Im, Llc | 4.06% | 1,211,236 | $61,760,924 | $53,161,148 | -$8,599,776 | -13.92% | |
| Frontier Capital Management Co Llc | 0.55% | 1,157,930 | $59,042,838 | $50,821,548 | -$8,221,290 | -13.92% | |
| Port Capital Llc | 2.15% | 1,034,293 | $52,738,600 | $45,395,120 | -$7,343,480 | -13.92% | |
| Royce & Associates Lp | 0.41% | 995,247 | $50,747,645 | $43,681,391 | -$7,066,254 | -13.92% | |
| Charles Schwab Investment Management Inc | 0.01% | 957,068 | $48,800,897 | $42,005,715 | -$6,795,182 | -13.92% | |
| Nuveen, Llc | 0.01% | 930,518 | $47,447,114 | $40,840,435 | -$6,606,679 | -13.92% | |
| Northern Trust Corp | 0.01% | 852,441 | $43,465,966 | $37,413,635 | -$6,052,331 | -13.92% | |
| Marshall Wace, Llp | 0.03% | 806,251 | $41,110,739 | $35,386,356 | -$5,724,383 | -13.92% | |
| Manufacturers Life Insurance Company, The | 0.03% | 767,841 | $39,152,213 | $33,700,541 | -$5,451,672 | -13.92% | |
| Boston Trust Walden Corp | 0.28% | 709,764 | $36,190,867 | $31,151,542 | -$5,039,325 | -13.92% | |
| Silvercrest Asset Management Group Llc | 0.23% | 702,658 | $35,828,728 | $30,839,660 | -$4,989,068 | -13.92% | |
| Woodline Partners Lp | 0.10% | 607,471 | $30,974,946 | $26,661,902 | -$4,313,044 | -13.92% | |
| Vanguard Fiduciary Trust Co | 0.01% | 583,865 | $29,771,276 | $25,625,835 | -$4,145,441 | -13.92% | |
| Bank Of New York Mellon Corp | 0.00% | 578,864 | $29,516,260 | $25,406,341 | -$4,109,919 | -13.92% | |
| Teacher Retirement System Of Texas | 0.07% | 533,685 | $27,212,598 | $23,423,435 | -$3,789,163 | -13.92% | |
| Aberdeen Group Plc | 0.04% | 521,724 | $26,602,707 | $22,898,466 | -$3,704,241 | -13.92% | |
| Boston Partners | 0.02% | 494,688 | $25,283,004 | $21,711,856 | -$3,571,148 | -14.12% | |
| Raymond James Financial Inc | 0.01% | 493,314 | $25,154,082 | $21,651,551 | -$3,502,531 | -13.92% | |
| Bank Of America Corp | 0.00% | 484,705 | $24,715,108 | $21,273,702 | -$3,441,406 | -13.92% | |
| Principal Financial Group Inc | 0.01% | 482,392 | $24,597,169 | $21,172,185 | -$3,424,984 | -13.92% | |
| D. E. Shaw & Co., Inc. | 0.02% | 482,029 | $24,578,659 | $21,156,253 | -$3,422,406 | -13.92% | |
| Federated Hermes, Inc. | 0.04% | 478,265 | $24,386,733 | $20,991,051 | -$3,395,682 | -13.92% | |
| New York State Common Retirement Fund | 0.03% | 457,331 | $23,319,308 | $20,072,258 | -$3,247,050 | -13.92% | |
| William Blair Investment Management, Llc | 0.06% | 405,168 | $20,659,516 | $17,782,824 | -$2,876,692 | -13.92% | |
| Massachusetts Financial Services Co | 0.01% | 403,485 | $20,573,700 | $17,708,957 | -$2,864,743 | -13.92% | |
| Ameriprise Financial Inc | 0.00% | 401,126 | $20,452,698 | $17,605,420 | -$2,847,278 | -13.92% | |
| Nomura Asset Management International Inc. | 0.03% | 395,982 | $20,191,000 | $17,379,650 | -$2,811,350 | -13.92% | |
| Gw&K Investment Management, Llc | 0.16% | 390,392 | $19,906,000 | $17,134,305 | -$2,771,695 | -13.92% | |
| Jpmorgan Chase & Co | 0.00% | 387,641 | $19,802,894 | $17,013,563 | -$2,789,331 | -14.09% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 383,637 | $19,561,651 | $16,837,828 | -$2,723,823 | -13.92% | |
| Victory Capital Management Inc | 0.01% | 378,117 | $19,280,186 | $16,595,555 | -$2,684,631 | -13.92% | |
| Ubs Group Ag | 0.00% | 372,005 | $18,968,535 | $16,327,299 | -$2,641,236 | -13.92% |
Frequently asked questions about ATMU
Who owns the most ATMU stock?
The largest holders of ATMU are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ATMUS FILTRATION TECHNOLOGIE (ATMU).
Is ATMU widely held by superinvestors?
Many widely followed stocks like ATMU appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ATMU is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.