ATMUS FILTRATION TECHNOLOGIE (ATMU) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $4.26B 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 $386.65M in its March 31, 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 $346.47M, representing an estimated loss of -10.39% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 45% 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
342
Total Reported Value
$4.26B
Largest Holder
Blackrock, Inc.
Largest Position
$386.65M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
72
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% | 6,810,861 | $386,652,580 | $346,468,499 | -$40,184,081 | -10.39% | |
| Fmr Llc | 0.01% | 4,937,777 | $280,317,604 | $251,184,716 | -$29,132,888 | -10.39% | |
| Vanguard Portfolio Management Llc | 0.01% | 3,689,470 | $209,451,212 | $187,683,339 | -$21,767,873 | -10.39% | |
| Vanguard Capital Management Llc | 0.01% | 3,566,486 | $202,469,410 | $181,427,143 | -$21,042,267 | -10.39% | |
| Invesco Ltd. | 0.03% | 3,343,900 | $189,833,203 | $170,104,193 | -$19,729,010 | -10.39% | |
| Goldman Sachs Group Inc | 0.02% | 3,290,936 | $186,826,434 | $167,409,914 | -$19,416,520 | -10.39% | |
| Geode Capital Management, Llc | 0.01% | 2,645,085 | $150,181,526 | $134,555,474 | -$15,626,052 | -10.40% | |
| First Trust Advisors Lp | 0.09% | 2,202,816 | $125,053,864 | $112,057,250 | -$12,996,614 | -10.39% | |
| State Street Corp | 0.00% | 1,895,114 | $107,585,622 | $96,404,449 | -$11,181,173 | -10.39% | |
| Morgan Stanley | 0.01% | 1,736,994 | $98,609,289 | $88,360,885 | -$10,248,404 | -10.39% | |
| D. E. Shaw & Co., Inc. | 0.07% | 1,620,752 | $92,010,091 | $82,447,654 | -$9,562,437 | -10.39% | |
| Janus Henderson Group Plc | 0.04% | 1,551,117 | $88,103,810 | $78,905,322 | -$9,198,488 | -10.44% | |
| Nuveen, Llc | 0.02% | 1,444,750 | $82,018,458 | $73,494,433 | -$8,524,026 | -10.39% | |
| Wellington Management Group Llp | 0.01% | 1,386,421 | $78,707,120 | $70,527,236 | -$8,179,884 | -10.39% | |
| Channing Capital Management, Llc | 2.01% | 1,385,924 | $78,678,905 | $70,501,954 | -$8,176,951 | -10.39% | |
| Mangrove Partners Im, Llc | 6.04% | 1,315,227 | $74,665,437 | $66,905,597 | -$7,759,840 | -10.39% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,302,972 | $73,958,755 | $66,282,186 | -$7,676,569 | -10.38% | |
| Eminence Capital, Lp | 1.67% | 1,281,995 | $72,778,856 | $65,215,086 | -$7,563,770 | -10.39% | |
| Westwood Holdings Group Inc | 0.51% | 1,239,186 | $70,348,588 | $63,037,392 | -$7,311,196 | -10.39% | |
| Neuberger Berman Group Llc | 0.05% | 1,174,210 | $66,659,902 | $59,732,063 | -$6,927,839 | -10.39% | |
| Arrowstreet Capital, Limited Partnership | 0.03% | 999,548 | $56,744,340 | $50,847,007 | -$5,897,333 | -10.39% | |
| Charles Schwab Investment Management Inc | 0.01% | 940,625 | $53,399,281 | $47,849,594 | -$5,549,687 | -10.39% | |
| Port Capital Llc | 2.29% | 908,680 | $51,585,764 | $46,224,552 | -$5,361,212 | -10.39% | |
| Bank Of America Corp | 0.00% | 893,577 | $50,728,365 | $45,456,262 | -$5,272,103 | -10.39% | |
| Massachusetts Financial Services Co | 0.02% | 818,850 | $50,263,921 | $41,654,900 | -$8,609,022 | -17.13% | |
| Parsifal Capital Management, Lp | 5.78% | 788,987 | $44,790,792 | $40,135,769 | -$4,655,023 | -10.39% | |
| Royce & Associates Lp | 0.44% | 777,735 | $44,152,016 | $39,563,379 | -$4,588,637 | -10.39% | |
| Manufacturers Life Insurance Company, The | 0.04% | 758,807 | $43,077,473 | $38,600,512 | -$4,476,961 | -10.39% | |
| Boston Trust Walden Corp | 0.35% | 750,579 | $42,610,370 | $38,181,954 | -$4,428,416 | -10.39% | |
| Frontier Capital Management Co Llc | 0.43% | 742,221 | $42,135,886 | $37,756,782 | -$4,379,104 | -10.39% | |
| Qube Research & Technologies Ltd | 0.06% | 741,198 | $42,077,810 | $37,704,742 | -$4,373,068 | -10.39% | |
| Silvercrest Asset Management Group Llc | 0.30% | 740,647 | $42,046,769 | $37,676,713 | -$4,370,056 | -10.39% | |
| Northern Trust Corp | 0.01% | 726,506 | $41,243,746 | $36,957,360 | -$4,286,386 | -10.39% | |
| Vanguard Fiduciary Trust Co | 0.01% | 564,188 | $32,028,953 | $28,700,244 | -$3,328,709 | -10.39% | |
| Federated Hermes, Inc. | 0.04% | 487,289 | $27,663,396 | $24,788,391 | -$2,875,005 | -10.39% | |
| Teacher Retirement System Of Texas | 0.11% | 474,416 | $26,932,596 | $24,133,542 | -$2,799,054 | -10.39% | |
| Healthcare Of Ontario Pension Plan Trust Fund | 0.04% | 454,638 | $25,809,799 | $23,127,435 | -$2,682,364 | -10.39% | |
| Raymond James Financial Inc | 0.01% | 446,743 | $24,630,360 | $22,725,816 | -$1,904,544 | -7.73% | |
| Jane Street Group, Llc | 0.03% | 426,622 | $24,219,331 | $21,702,261 | -$2,517,070 | -10.39% | |
| William Blair Investment Management, Llc | 0.08% | 426,072 | $24,188,107 | $21,674,283 | -$2,513,824 | -10.39% | |
| Ubs Group Ag | 0.00% | 381,676 | $21,667,747 | $19,415,858 | -$2,251,889 | -10.39% | |
| Aberdeen Group Plc | 0.03% | 372,794 | $21,163,516 | $18,964,031 | -$2,199,485 | -10.39% | |
| New York State Common Retirement Fund | 0.03% | 362,222 | $20,563,343 | $18,426,233 | -$2,137,110 | -10.39% | |
| Bank Of New York Mellon Corp | 0.00% | 359,696 | $20,419,922 | $18,297,736 | -$2,122,186 | -10.39% | |
| Woodline Partners Lp | 0.08% | 355,936 | $20,206,487 | $18,106,464 | -$2,100,023 | -10.39% | |
| Susquehanna International Group, Llp | 0.02% | 339,083 | $19,249,742 | $17,249,152 | -$2,000,590 | -10.39% | |
| Marshall Wace, Llp | 0.02% | 322,609 | $18,314,511 | $16,411,120 | -$1,903,391 | -10.39% | |
| Barclays Plc | 0.01% | 308,725 | $17,526,317 | $15,704,841 | -$1,821,476 | -10.39% | |
| Loomis Sayles & Co L P | 0.02% | 292,366 | $16,597,618 | $14,872,658 | -$1,724,960 | -10.39% | |
| Schonfeld Strategic Advisors Llc | 0.13% | 286,704 | $16,276,185 | $14,584,632 | -$1,691,553 | -10.39% |
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.