Vault-13

ATMUS FILTRATION TECHNOLOGIE ATMU

COM · Common Stock · CUSIP 04956D107

231 institutional holders +137 vs Q4 2023
95,919,73195.9m shares reported held*
115.1% of all shares outstanding*
$3.1bnreported value*
144 new 67 added 14 reduced 10 sold out net bought ≈ $2.2bn (+67.3m shares)

* 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. Holder counts are more reliable. Shares outstanding: 83.4m as of 2024-04-30, 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 ≈ $32.24. Options: 15 managers hold calls ($156.1m notional), 16 hold puts ($84.9m).

Trends to Q1 2024

Institutional holders

Managers reporting a position, each quarter

0100200300Q2 23: 68Q3 23: 83Q4 23: 94Q1 24: 231231Q2 23Q3 23Q4 23Q1 24
Numbers
QuarterHolders
Q2 202368
Q3 202383
Q4 202394
Q1 2024231

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
4000400Q3 23: 65 bought or addedQ3 23: 32 cut or sold outQ3 23Q4 23: 63 bought or addedQ4 23: 32 cut or sold outQ4 23Q1 24: 211 bought or addedQ1 24: 24 cut or sold outQ1 24
Numbers
QuarterBought or addedCut or sold out
Q3 20236532
Q4 20236332
Q1 202421124

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$50m$100m$150m$200mQ2 23 calls: $731Q2 23 puts: $0Q2 23P/C 0.00Q3 23 calls: $9.7mQ3 23 puts: $1.1mQ3 23P/C 0.11Q4 23 calls: $30.3mQ4 23 puts: $885.0kQ4 23P/C 0.03Q1 24 calls: $156.1mQ1 24 puts: $84.9mQ1 24P/C 0.54
Numbers
QuarterCallsPutsP/C
Q2 2023$731$00.00
Q3 2023$9.7m$1.1m0.11
Q4 2023$30.3m$885.0k0.03
Q1 2024$156.1m$84.9m0.54

Biggest buyers

MORGAN STANLEY Added +9,718,319+9.7m
VANGUARD GROUP INC Added +6,348,391+6.3m
BlackRock Inc. Added +4,152,972+4.2m
FMR LLC Added +3,023,835+3.0m
GOLDMAN SACHS GROUP INC Added +2,531,113+2.5m
WELLINGTON MANAGEMENT GROUP LLP Added +1,988,845+2.0m
Balyasny Asset Management L.P. Added +1,823,830+1.8m
Artisan Partners Limited Partnership New +1,622,262+1.6m
STATE STREET CORP Added +1,551,284+1.6m
JANE STREET GROUP, LLC Added +1,547,948+1.5m

Biggest sellers

Weiss Asset Management LP Reduced -545,299-545.3k
ArrowMark Colorado Holdings LLC Reduced -282,114-282.1k
Western Standard LLC Reduced -162,543-162.5k
DekaBank Deutsche Girozentrale Sold out -111,730-111.7k
RENAISSANCE TECHNOLOGIES LLC Sold out -100,900-100.9k
Alpine Global Management, LLC Sold out -90,000-90.0k
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC Reduced -88,730-88.7k
ARISTEIA CAPITAL, L.L.C. Sold out -75,000-75.0k
Ghisallo Capital Management LLC Reduced -50,000-50.0k
NOMURA HOLDINGS INC Reduced -25,356-25.4k

Biggest calls

BARCLAYS PLC Added $34.7m1.1m shares
TOMS Capital Investment Management LP New $32.2m1.0m shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $18.6m575.9k shares
CITADEL ADVISORS LLC Added $17.0m528.5k shares
Governors Lane LP New $14.7m457.2k shares
Squarepoint Ops LLC New $12.7m392.8k shares
BANK OF AMERICA CORP /DE/ New $9.8m304.6k shares
SIMPLEX TRADING, LLC Added $7.0m217.4k shares
GROUP ONE TRADING LLC Reduced $3.2m99.5k shares
TORNO CAPITAL, LLC New $2.3m70.0k shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP New $27.3m847.7k shares
SIMPLEX TRADING, LLC New $12.8m396.9k shares
GROUP ONE TRADING LLC New $12.3m380.6k shares
MILLENNIUM MANAGEMENT LLC New $9.7m300.0k shares
CITADEL ADVISORS LLC Added $8.2m253.3k shares
NATIXIS New $3.2m100.0k shares
PEAK6 Investments LLC New $3.1m95.2k shares
Walleye Trading LLC New $2.8m86.3k shares
CSS LLC/IL New $1.9m60.2k shares
BANK OF MONTREAL /CAN/ New $1.6m50.0k 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.

HolderStakeChangeShares Last filed
BlackRock, Inc. 13G · institution filed 2026-05-06 14.2% 11.6m≈ $590.0m 2026-05-06
FMR LLC 13G · institution +1.1 pts · filed 2026-08-06 6.5% +1.1 pts 5.3m≈ $271.1m 2026-08-06
VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-07-31 5.7% new 4.7m≈ $238.8m 2026-07-31
PRICE T ROWE ASSOCIATES INC /MD/ 13G · institution +3.2 pts · filed 2026-02-17 5.7% +3.2 pts 4.7m≈ $238.5m 2026-02-17
Invesco Ltd. 13G · institution new · filed 2026-08-13 5.5% new 4.5m≈ $227.3m 2026-08-13
VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 5.1% new 4.2m≈ $212.7m 2026-04-29

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 2024

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)

BuyingSelling
101Q2 22: 0 buyingQ2 22: 0 sellingQ3 22: 0 buyingQ3 22: 0 sellingQ3 22Q4 22: 0 buyingQ4 22: 0 sellingQ1 23: 0 buyingQ1 23: 0 sellingQ1 23Q2 23: 1 buyingQ2 23: 0 sellingQ3 23: 0 buyingQ3 23: 0 sellingQ3 23Q4 23: 1 buyingQ4 23: 0 sellingQ1 24: 0 buyingQ1 24: 0 sellingQ1 24
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q2 20220—0——
Q3 20220—0——
Q4 20220—0——
Q1 20230—0——
Q2 20231$100.0k0——
Q3 20230—0——
Q4 20231$101.3k0——
Q1 20240—0——

None reported in Q1 2024.

Holders, Q1 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 MORGAN STANLEY 0.01% of their portfolio NEW YORK, NY 11,898,65711.9m $383.7m $383.7m 0.01% Added +9.7m +9,718,319
2 VANGUARD GROUP INC 0.01% of their portfolio Valley Forge, PA 8,080,6418.1m $260.6m $260.6m 0.01% Added +6.3m +6,348,391
3 FMR LLC 0.01% of their portfolio BOSTON, MA 5,893,3035.9m $190.1m $190.1m 0.01% Added +3.0m +3,023,835
4 BlackRock Inc. 0.00% of their portfolio New York, NY 5,650,8045.7m $182.2m $182.2m 0.00% Added +4.2m +4,152,972
5 GOLDMAN SACHS GROUP INC 0.02% of their portfolio NEW YORK, NY 3,177,8883.2m $102.5m $102.5m 0.02% Added +2.5m +2,531,113
6 WELLINGTON MANAGEMENT GROUP LLP 0.02% of their portfolio Boston, MA 2,816,8902.8m $90.8m $90.8m 0.02% Added +2.0m +1,988,845
7 FRANKLIN RESOURCES INC 0.03% of their portfolio San Mateo, CA 2,646,3602.6m $85.3m $85.3m 0.03% Added +43.6k +43,614
8 PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio BALTIMORE, MD 2,088,4962.1m $67.4m $67.4m 0.01% Added +583.1k +583,078
9 AMERICAN CENTURY COMPANIES INC 0.04% of their portfolio KANSAS CITY, MO 1,927,8861.9m $62.2m $62.2m 0.04% Added +752.0k +752,006
10 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 1,858,2641.9m $59.9m $59.9m 0.00% Added +1.6m +1,551,284
11 Balyasny Asset Management L.P. 0.15% of their portfolio Chicago, IL 1,857,7091.9m $59.9m $59.9m 0.15% Added +1.8m +1,823,830
12 HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC 0.20% of their portfolio Los Angeles, CA 1,857,4901.9m $59.9m $59.9m 0.20% Reduced -88.7k -88,730
13 JANE STREET GROUP, LLC 0.08% of their portfolio NEW YORK, NY 1,826,8501.8m $58.9m $58.9m 0.08% Added +1.5m +1,547,948
14 GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio BOSTON, MA 1,756,6681.8m $56.7m $56.7m 0.01% Added +1.4m +1,449,974
15 Artisan Partners Limited Partnership 0.08% of their portfolio Milwaukee, WI 1,622,2621.6m $52.3m $52.3m 0.08% New
16 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 1,506,0771.5m $48.6m $48.6m 0.00% Added +1.1m +1,095,729
17 Weiss Asset Management LP 2.09% of their portfolio BOSTON, MA 1,385,8831.4m $44.7m $44.7m 2.09% Reduced -545.3k -545,299
18 MANGROVE PARTNERS IM, LLC 2.98% of their portfolio Greenwich, CT 1,264,7001.3m $40.8m $40.8m 2.98% Added +142.5k +142,484
19 MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.01% of their portfolio Boston, MA 1,215,6311.2m $39.2m $39.2m 0.01% New
20 Schonfeld Strategic Advisors LLC 0.30% of their portfolio NEW YORK, NY 1,174,0961.2m $37.9m $37.9m 0.30% New
21 Rubric Capital Management LP 1.08% of their portfolio NEW YORK, NY 1,132,0561.1m $36.5m $36.5m 1.08% New
22 Nuveen Asset Management, LLC 0.01% of their portfolio CHICAGO, IL 1,123,5611.1m $36.2m $36.2m 0.01% Added +250.6k +250,642
23 Jefferies Financial Group Inc. 0.69% of their portfolio NEW YORK, NY 1,056,3031.1m $34.1m $34.1m 0.69% New
24 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 1,004,6521.0m $32.4m $32.4m 0.00% Added +691.3k +691,324
25 Allspring Global Investments Holdings, LLC 0.05% of their portfolio CHARLOTTE, NC 973,246973.2k $31.4m $31.4m 0.05% Added +484.4k +484,420
26 CARDINAL CAPITAL MANAGEMENT LLC /CT 1.53% of their portfolio GREENWICH, CT 943,629943.6k $30.4m $30.4m 1.53% New
27 Point72 Asset Management, L.P. 0.09% of their portfolio STAMFORD, CT 915,986916.0k $29.5m $29.5m 0.09% New
28 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.03% of their portfolio Toronto, A6 858,120858.1k $27.7m $27.7m 0.03% Added +172.4k +172,391
29 Boston Partners 0.03% of their portfolio BOSTON, MA 843,012843.0k $27.1m $27.1m 0.03% New
30 TWO SIGMA INVESTMENTS, LP 0.07% of their portfolio NEW YORK, NY 828,883828.9k $26.7m $26.7m 0.07% Added +804.3k +804,289
31 Bayberry Capital Partners LP 7.01% of their portfolio NEW YORK, NY 800,000800.0k $25.8m $25.8m 7.01% New
32 SAMLYN CAPITAL, LLC 0.43% of their portfolio New York, NY 768,159768.2k $24.8m $24.8m 0.43% New
33 Medina Value Partners, LLC 11.43% of their portfolio LOS ANGELES, CA 723,444723.4k $23.3m $23.3m 11.43% Added +215.4k +215,359
34 HIGHLAND PEAK CAPITAL, LLC 13.92% of their portfolio OLD GREENWICH, CT 710,925710.9k $22.9m $22.9m 13.92% New
35 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 696,686696.7k $22.5m $22.5m 0.00% Added +558.9k +558,886
36 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 664,121664.1k $21.4m $21.4m 0.00% Added +547.7k +547,742
37 D. E. Shaw & Co., Inc. 0.03% of their portfolio New York, NY 656,882656.9k $21.2m $21.2m 0.03% Added +555.0k +554,984
38 Parsifal Capital Management, LP 1.46% of their portfolio GREENWICH, CT 655,469655.5k $21.1m $21.1m 1.46% New
39 MARSHALL WACE, LLP 0.03% of their portfolio LONDON, X0 622,375622.4k $20.1m $20.1m 0.03% New
40 ROYCE & ASSOCIATES LP 0.18% of their portfolio New York, NY 621,348621.3k $20.0m $20.0m 0.18% Added +397.1k +397,068
41 CAAS CAPITAL MANAGEMENT LP 8.44% of their portfolio NEW YORK, NY 615,223615.2k $19.8m $19.8m 8.44% New
42 VICTORY CAPITAL MANAGEMENT INC 0.02% of their portfolio San Antonio, TX 613,289613.3k $19.8m $19.8m 0.02% Added +573.4k +573,406
43 TWO SIGMA ADVISERS, LP 0.04% of their portfolio NEW YORK, NY 563,198563.2k $18.2m $18.2m 0.04% Added +366.7k +366,698
44 Governors Lane LP 2.87% of their portfolio NEW YORK, NY 555,176555.2k $17.9m $17.9m 2.87% New
45 KENNEDY CAPITAL MANAGEMENT LLC 0.35% of their portfolio ST LOUIS, MO 530,838530.8k $17.1m $17.1m 0.35% Added +246.3k +246,287
46 INTRINSIC EDGE CAPITAL MANAGEMENT LLC 1.37% of their portfolio CHICAGO, IL 500,000500.0k $16.1m $16.1m 1.37% New
47 Wolf Hill Capital Management, LP 1.06% of their portfolio GREENWICH, CT 500,000500.0k $16.1m $16.1m 1.06% New
48 Rivermont Capital Management LP 5.63% of their portfolio NEW YORK, NY 476,479476.5k $15.4m $15.4m 5.63% New
49 FIL Ltd 0.01% of their portfolio HAMILTON, D0 458,658458.7k $14.8m $14.8m 0.01% New
50 Russell Investments Group, Ltd. 0.02% of their portfolio Seattle, WA 424,066424.1k $13.7m $13.7m 0.02% Added +423.9k +423,896
51 GW&K Investment Management, LLC 0.12% of their portfolio BOSTON, MA 413,428413.4k $13.3m $13.3m 0.12% Added +111.6k +111,565
52 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 408,176408.2k $13.2m $13.2m 0.00% Added +52.1k +52,066
53 BARCLAYS PLC 0.01% of their portfolio LONDON, X0 398,654398.7k $12.9m $12.9m 0.01% Added +372.8k +372,805
54 Grandeur Peak Global Advisors, LLC 0.98% of their portfolio SALT LAKE CITY, UT 381,159381.2k $12.3m $12.3m 0.98% New
55 LOOMIS SAYLES & CO L P 0.02% of their portfolio BOSTON, MA 374,093374.1k $12.1m $12.1m 0.02% New
56 MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio NEW YORK, NY 340,268340.3k $11.0m $11.0m 0.01% New
57 HAWK RIDGE CAPITAL MANAGEMENT LP 0.47% of their portfolio LOS ANGELES, CA 320,664320.7k $10.3m $10.3m 0.47% New
58 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 307,711307.7k $9.9m $9.9m 0.00% Added +189.0k +188,975
59 Walleye Capital LLC 0.11% of their portfolio NEW YORK, NY 303,158303.2k $9.8m $9.8m 0.11% Added +291.9k +291,858
60 Verition Fund Management LLC 0.09% of their portfolio GREENWICH, CT 291,820291.8k $9.4m $9.4m 0.09% New
61 Polar Asset Management Partners Inc. 0.25% of their portfolio TORONTO, A6 288,621288.6k $9.3m $9.3m 0.25% New
62 Squarepoint Ops LLC 0.04% of their portfolio NEW YORK, NY 280,469280.5k $9.0m $9.0m 0.04% Added +270.5k +270,481
63 SEI INVESTMENTS CO 0.01% of their portfolio OAKS, PA 270,428270.4k $8.7m $8.7m 0.01% Added +118.7k +118,670
64 Park West Asset Management LLC 0.65% of their portfolio SAN FRANCISCO, CA 270,000270.0k $8.7m $8.7m 0.65% New
65 PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio DES MOINES, IA 261,736261.7k $8.4m $8.4m 0.00% New
66 KINGDON CAPITAL MANAGEMENT, L.L.C. 1.07% of their portfolio NEW YORK, NY 251,690251.7k $8.1m $8.1m 1.07% New
67 Clearline Capital LP 0.78% of their portfolio NEW YORK, NY 245,272245.3k $7.9m $7.9m 0.78% New
68 Quantbot Technologies LP 0.43% of their portfolio NEW YORK, NY 239,250239.2k $7.7m $7.7m 0.43% New
69 One Fin Capital Management LP 2.59% of their portfolio San Francisco, CA 235,000235.0k $7.6m $7.6m 2.59% New
70 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio BOSTON, MA 220,216220.2k $7.1m $7.1m 0.01% New
71 BOOTHBAY FUND MANAGEMENT, LLC 0.19% of their portfolio NEW YORK, NY 214,234214.2k $6.9m $6.9m 0.19% New
72 CITADEL ADVISORS LLC 0.01% of their portfolio MIAMI, FL 208,806208.8k $6.7m $6.7m 0.01% Added +181.5k +181,505
73 NEUBERGER BERMAN GROUP LLC 0.01% of their portfolio NEW YORK, NY 201,406201.4k $6.5m $6.5m 0.01% New
74 Kepos Capital LP 1.66% of their portfolio NEW YORK, NY 200,000200.0k $6.5m $6.5m 1.66% New
75 Hudson Bay Capital Management LP 0.05% of their portfolio STAMFORD, CT 190,362190.4k $6.1m $6.1m 0.05% New
76 Aperture Investors, LLC 0.78% of their portfolio New York, NY 188,896188.9k $6.1m $6.1m 0.78% New
77 Swiss National Bank 0.00% of their portfolio ZURICH, V8 188,349188.3k $6.1m $6.1m 0.00% Added +155.4k +155,449
78 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 178,507178.5k $5.8m $5.8m 0.00% Added +173.0k +172,982
79 ArrowMark Colorado Holdings LLC 0.06% of their portfolio Denver, CO 177,662177.7k $5.7m $5.7m 0.06% Reduced -282.1k -282,114
80 WOLVERINE ASSET MANAGEMENT LLC 0.11% of their portfolio CHICAGO, IL 170,000170.0k $5.5m $5.5m 0.11% New
81 Boussard & Gavaudan Investment Management LLP 0.74% of their portfolio London, X0 158,350158.3k $5.1m $5.1m 0.74% New
82 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio BALA CYNWYD, PA 155,346155.3k $5.0m $5.0m 0.01% Added +139.5k +139,463
83 STATE OF WISCONSIN INVESTMENT BOARD 0.01% of their portfolio MADISON, WI 136,748136.7k $4.4m $4.4m 0.01% Reduced -5.9k -5,928
84 NATIXIS 0.02% of their portfolio PARIS, I0 136,040136.0k $4.4m $4.4m 0.02% New
85 MACQUARIE GROUP LTD 0.00% of their portfolio Sydney, NSW 2000, C3 135,837135.8k $4.4m $4.4m 0.00% New
86 Tweedy, Browne Co LLC 0.20% of their portfolio Stamford, CT 132,195132.2k $4.3m $4.3m 0.20% Unchanged
87 Jump Financial, LLC 0.11% of their portfolio Chicago, IL 127,111127.1k $4.1m $4.1m 0.11% Added +102.8k +102,812
88 Diameter Capital Partners LP 0.67% of their portfolio New York, NY 125,000125.0k $4.0m $4.0m 0.67% New
89 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 102,593102.6k $3.3m $3.3m 0.00% Added +80.7k +80,729
90 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 101,929101.9k $3.3m $3.3m 0.00% Added +99.6k +99,593
91 Monashee Investment Management LLC 0.38% of their portfolio Boston, MA 100,000100.0k $3.2m $3.2m 0.38% New
92 UBS Group AG 0.00% of their portfolio ZURICH, V8 99,18799.2k $3.2m $3.2m 0.00% Added +78.9k +78,933
93 CALDWELL SUTTER CAPITAL, INC. 1.52% of their portfolio SAUSALITO, CA 97,86197.9k $3.2m $3.2m 1.52% New
94 CAPSTONE INVESTMENT ADVISORS, LLC 0.06% of their portfolio NEW YORK, NY 95,39895.4k $3.1m $3.1m 0.06% Added +85.4k +85,398
95 Greenland Capital Management LP 0.51% of their portfolio NEW YORK, NY 95,25095.2k $3.1m $3.1m 0.51% New
96 NOMURA HOLDINGS INC 0.02% of their portfolio TOKYO, M0 92,30292.3k $3.0m $3.0m 0.02% Reduced -25.4k -25,356
97 CAMBIAR INVESTORS LLC 0.11% of their portfolio Denver, CO 87,59887.6k $2.8m $2.8m 0.11% Reduced -7.0k -6,992
98 Bayesian Capital Management, LP 0.27% of their portfolio Brooklyn, NY 86,50086.5k $2.8m $2.8m 0.27% New
99 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 85,94385.9k $2.8m $2.8m 0.00% New
100 GTS SECURITIES LLC 0.06% of their portfolio NEW YORK, NY 85,00085.0k $2.3m $2.3m 0.06% New