Atmus Filtration Technologies (ATMU)
Atmus Filtration Technologies on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on NYSE, classified by the SEC as motor vehicle parts & accessories.
3.4M
Short interest
settlement 2026-10-15
4.9
Days to cover
+1.2 days vs prior
62.7%
Short share of volume
2026-11-02
1
Fails to deliver
settlement 2026-10-09
Fri 6 Nov
Next earnings
estimated date
-$97K
Insider flow, 90 days
1 buys, 1 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in ATMU is 3,358,055 shares, up 270,370 shares over the last month. Over the last 48 readings it ranged from 1,330,202 shares (15 January 2025) to 4,358,706 shares (15 April 2026). At the reported average volume of 683K shares a day that is 4.9 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 3,358,055 | -1.3% | 682,562 | 4.92 |
| 2026-09-30 | 3,400,405 | +10.1% | 903,225 | 3.76 |
| 2026-09-15 | 3,087,685 | -18.9% | 610,713 | 5.06 |
| 2026-08-31 | 3,807,016 | +24.8% | 518,333 | 7.34 |
| 2026-08-14 | 3,050,905 | +5.0% | 900,337 | 3.39 |
| 2026-07-31 | 2,907,077 | -1.9% | 543,077 | 5.35 |
| 2026-07-15 | 2,964,034 | -12.7% | 592,158 | 5.01 |
| 2026-06-30 | 3,393,791 | +7.6% | 1,121,045 | 3.03 |
| 2026-06-15 | 3,154,714 | -0.8% | 897,510 | 3.51 |
| 2026-05-29 | 3,181,341 | -10.2% | 848,003 | 3.75 |
| 2026-05-15 | 3,543,464 | -4.5% | 1,488,832 | 2.38 |
| 2026-04-30 | 3,708,685 | -14.9% | 947,173 | 3.92 |
| 2026-04-15 | 4,358,706 | +79.8% | 2,618,681 | 1.66 |
| 2026-03-31 | 2,423,756 | +5.7% | 770,828 | 3.14 |
| 2026-03-13 | 2,293,004 | +17.3% | 811,625 | 2.83 |
| 2026-02-27 | 1,955,535 | -2.9% | 995,873 | 1.96 |
| 2026-02-13 | 2,014,325 | -13.5% | 1,133,575 | 1.78 |
| 2026-01-30 | 2,329,732 | -11.2% | 507,512 | 4.59 |
| 2026-01-15 | 2,623,382 | +10.7% | 463,140 | 5.66 |
| 2025-12-31 | 2,369,861 | +17.1% | 649,759 | 3.65 |
| 2025-12-15 | 2,023,198 | +8.1% | 695,067 | 2.91 |
| 2025-11-28 | 1,870,896 | -0.9% | 890,937 | 2.10 |
| 2025-11-14 | 1,887,155 | +0.7% | 808,849 | 2.33 |
| 2025-10-31 | 1,873,919 | +8.6% | 612,170 | 3.06 |
| 2025-10-15 | 1,724,962 | -16.2% | 547,867 | 3.15 |
| 2025-09-30 | 2,057,426 | -4.2% | 752,807 | 2.73 |
| 2025-09-15 | 2,147,582 | -2.8% | 752,963 | 2.85 |
| 2025-08-29 | 2,208,406 | +3.4% | 714,095 | 3.09 |
| 2025-08-15 | 2,135,620 | -3.0% | 1,056,446 | 2.02 |
| 2025-07-31 | 2,202,685 | -14.2% | 530,951 | 4.15 |
| 2025-07-15 | 2,567,442 | +21.4% | 707,065 | 3.63 |
| 2025-06-30 | 2,114,351 | +11.8% | 830,341 | 2.55 |
| 2025-06-13 | 1,891,797 | +36.5% | 597,336 | 3.17 |
| 2025-05-30 | 1,385,959 | -5.0% | 800,504 | 1.73 |
| 2025-05-15 | 1,458,343 | +8.2% | 677,629 | 2.15 |
| 2025-04-30 | 1,348,271 | -12.6% | 694,875 | 1.94 |
| 2025-04-15 | 1,542,735 | -23.7% | 1,074,267 | 1.44 |
| 2025-03-31 | 2,022,459 | +2.8% | 1,065,911 | 1.90 |
| 2025-03-14 | 1,968,008 | +28.0% | 1,099,746 | 1.79 |
| 2025-02-28 | 1,537,947 | +9.7% | 1,060,578 | 1.45 |
| 2025-02-14 | 1,402,280 | -29.5% | 569,891 | 2.46 |
| 2025-01-31 | 1,988,893 | +49.5% | 624,968 | 3.18 |
| 2025-01-15 | 1,330,202 | -26.7% | 608,346 | 2.19 |
| 2024-12-31 | 1,815,597 | +12.1% | 536,333 | 3.39 |
| 2024-12-13 | 1,620,269 | -27.2% | 928,911 | 1.74 |
| 2024-11-29 | 2,226,493 | -7.3% | 635,584 | 3.50 |
| 2024-11-15 | 2,401,949 | -6.5% | 1,013,043 | 2.37 |
| 2024-10-31 | 2,568,160 | -1.9% | 694,338 | 3.70 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of ATMU volume is 62.7%, up 20.3 points over the last five sessions. Over the last 30 readings it ranged from 21.6% (15 October 2026) to 74.1% (19 October 2026). The latest reading is 7.0 points above the 30-session average of 55.7%, on 327K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 205K | 327K | 62.7% | 0 |
| 2026-10-30 | 169K | 235K | 71.9% | 0 |
| 2026-10-29 | 119K | 179K | 66.5% | 0 |
| 2026-10-28 | 113K | 179K | 62.7% | 339 |
| 2026-10-27 | 186K | 362K | 51.3% | 0 |
| 2026-10-26 | 96K | 225K | 42.5% | 0 |
| 2026-10-23 | 93K | 133K | 70.4% | 0 |
| 2026-10-22 | 129K | 202K | 63.6% | 0 |
| 2026-10-21 | 91K | 126K | 72.3% | 0 |
| 2026-10-20 | 181K | 276K | 65.7% | 0 |
| 2026-10-19 | 193K | 261K | 74.1% | 0 |
| 2026-10-16 | 125K | 325K | 38.6% | 0 |
| 2026-10-15 | 116K | 537K | 21.6% | 0 |
| 2026-10-14 | 73K | 165K | 44.0% | 0 |
| 2026-10-13 | 79K | 193K | 41.0% | 0 |
| 2026-10-12 | 60K | 113K | 52.8% | 0 |
| 2026-10-09 | 88K | 203K | 43.4% | 311 |
| 2026-10-08 | 161K | 442K | 36.4% | 48 |
| 2026-10-07 | 103K | 190K | 54.5% | 13 |
| 2026-10-06 | 82K | 136K | 60.6% | 457 |
| 2026-10-05 | 149K | 237K | 62.7% | 52 |
| 2026-10-02 | 233K | 361K | 64.5% | 0 |
| 2026-10-01 | 173K | 355K | 48.6% | 0 |
| 2026-09-30 | 118K | 212K | 55.7% | 11 |
| 2026-09-29 | 146K | 420K | 34.7% | 400 |
| 2026-09-28 | 126K | 275K | 45.9% | 722 |
| 2026-09-25 | 89K | 138K | 64.6% | 0 |
| 2026-09-24 | 127K | 202K | 62.9% | 0 |
| 2026-09-23 | 128K | 178K | 71.7% | 0 |
| 2026-09-22 | 154K | 243K | 63.4% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 9 October 2026, the fails-to-deliver balance in ATMU is 1 share, down 50 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (12 February 2026) to 42,634 shares (30 June 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-09 | 1 | $42.62 | $43 |
| 2026-09-30 | 51 | $43.94 | $2K |
| 2026-09-22 | 2,006 | $44.59 | $89K |
| 2026-09-03 | 555 | $47.29 | $26K |
| 2026-08-19 | 8 | $49.89 | $399 |
| 2026-08-05 | 2,532 | $55.12 | $140K |
| 2026-08-04 | 447 | $53.88 | $24K |
| 2026-07-17 | 1,769 | $52.45 | $93K |
| 2026-07-15 | 2,848 | $52.07 | $148K |
| 2026-06-30 | 42,634 | $51.00 | $2.2M |
| 2026-06-04 | 158 | $47.37 | $7K |
| 2026-06-02 | 1,089 | $45.70 | $50K |
| 2026-05-22 | 2 | $48.43 | $97 |
| 2026-05-12 | 1 | $56.60 | $57 |
| 2026-05-07 | 749 | $54.25 | $41K |
| 2026-05-04 | 42 | $52.65 | $2K |
| 2026-05-01 | 31,459 | $63.40 | $2.0M |
| 2026-04-21 | 12 | $63.03 | $756 |
| 2026-04-20 | 20 | $63.38 | $1K |
| 2026-03-30 | 18 | $58.07 | $1K |
| 2026-03-18 | 4 | $56.65 | $227 |
| 2026-03-04 | 252 | $62.85 | $16K |
| 2026-03-03 | 2,868 | $65.57 | $188K |
| 2026-02-17 | 1 | $64.12 | $64 |
| 2026-02-12 | 1 | $63.00 | $63 |
| 2026-01-20 | 100 | $56.68 | $6K |
| 2025-11-20 | 626 | $46.92 | $29K |
| 2025-11-19 | 626 | $46.26 | $29K |
| 2025-11-17 | 16 | $47.64 | $762 |
| 2025-11-14 | 16 | $48.69 | $779 |
Insider trades
SEC Form 4, newest first. JSONOver the last 90 days ATMU insiders reported 1 open-market buy ($100K) against 1 sell ($197K), so the dollar flow leans toward selling. Latest filing: Swan Renee (Chief People Officer) on 2026-08-17.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-08-17 | Swan Renee | Chief People Officer | Sell | 4K | $50.89 | $197K | 47K |
| 2026-08-12 | Macadam Stephen E. | Director | Buy | 2K | $49.78 | $100K | 41K |
| 2026-06-01 | Swan Renee | Chief People Officer | Sell | 3K | $45.25 | $116K | 51K |
| 2026-06-01 | Kienzler Jack | Chief Financial Officer | Sell | 5K | $45.25 | $232K | 76K |
| 2026-06-01 | Masters Charles | Senior Vice President | Sell | 3K | $45.25 | $131K | 44K |
| 2026-06-01 | Disher Stephanie | Chief Executive Officer | Sell | 26K | $45.25 | $1.2M | 363K |
| 2026-05-12 | HAGGERTY GRETCHEN R | Director | Buy | 100 | $55.71 | $6K | 24K |
| 2026-05-12 | Sharp Heath | Director | Grant | 3K | $0.00 | $0 | 6K |
| 2026-05-12 | Bennett Roy Edwin | Director | Grant | 3K | $0.00 | $0 | 19K |
| 2026-05-12 | Carpenter Kevin N | SVP-Chief Supply Chain Officer | Grant | 29K | $0.00 | $0 | 29K |
| 2026-05-12 | Donoso Diego | Director | Grant | 3K | $0.00 | $0 | 12K |
| 2026-05-12 | Macadam Stephen E. | Director | Grant | 3K | $0.00 | $0 | 39K |
| 2026-05-12 | Leipold Jane A | Director | Grant | 3K | $0.00 | $0 | 21K |
| 2026-05-12 | HAGGERTY GRETCHEN R | Director | Grant | 3K | $0.00 | $0 | 28K |
| 2026-05-12 | HAGGERTY GRETCHEN R | Director | Buy | 2K | $55.74 | $104K | 26K |
| 2026-05-12 | HAGGERTY GRETCHEN R | Director | Buy | 1 | $55.74 | $56 | 24K |
| 2026-05-12 | HAGGERTY GRETCHEN R | Director | Buy | 100 | $55.71 | $6K | 24K |
| 2026-05-12 | TAYLOR STUART A II | Director | Grant | 3K | $0.00 | $0 | 12K |
| 2026-04-01 | Swan Renee | Chief People Officer | Grant | 2K | $0.00 | $0 | 53K |
| 2026-04-01 | Kienzler Jack | Chief Financial Officer | Grant | 5K | $0.00 | $0 | 81K |
| 2026-04-01 | Masters Charles | Senior Vice President | Grant | 4K | $0.00 | $0 | 46K |
| 2026-04-01 | Disher Stephanie | Chief Executive Officer | Grant | 31K | $0.00 | $0 | 389K |
| 2026-04-01 | Heltebran Laura | CLO & Corp Sec | Grant | 4K | $0.00 | $0 | 24K |
| 2026-02-27 | Swan Renee | Chief People Officer | Tax withholding | 2K | $64.53 | $145K | 51K |
| 2026-02-27 | Swan Renee | Chief People Officer | Tax withholding | 10K | $64.53 | $618K | 54K |
| 2026-02-27 | Kienzler Jack | Chief Financial Officer | Tax withholding | 4K | $64.53 | $249K | 76K |
| 2026-02-27 | Kienzler Jack | Chief Financial Officer | Tax withholding | 16K | $64.53 | $1.0M | 80K |
| 2026-02-27 | Masters Charles | Senior Vice President | Tax withholding | 2K | $64.53 | $138K | 42K |
| 2026-02-27 | Masters Charles | Senior Vice President | Tax withholding | 9K | $64.53 | $584K | 44K |
| 2026-02-27 | Disher Stephanie | Chief Executive Officer | Tax withholding | 16K | $64.53 | $1.0M | 357K |
| 2026-02-27 | Disher Stephanie | Chief Executive Officer | Tax withholding | 67K | $64.53 | $4.3M | 373K |
| 2026-02-13 | Swan Renee | Chief People Officer | Grant | 19K | $0.00 | $0 | 63K |
| 2026-02-13 | Kienzler Jack | Chief Financial Officer | Grant | 41K | $0.00 | $0 | 96K |
| 2026-02-13 | Masters Charles | Senior Vice President | Grant | 21K | $0.00 | $0 | 54K |
| 2026-02-13 | Disher Stephanie | Chief Executive Officer | Grant | 169K | $0.00 | $0 | 440K |
| 2026-02-05 | Sharp Heath | Director | Grant | 614 | $0.00 | $0 | 3K |
| 2025-11-18 | Donoso Diego | Director | Other transaction | 20 | $0.00 | $0 | 9K |
| 2025-11-13 | Donoso Diego | Director | Sell | 20 | $48.84 | $977 | 9K |
| 2025-10-03 | Kienzler Jack | Chief Financial Officer | Tax withholding | 25 | $44.50 | $1K | 55K |
| 2025-10-03 | Masters Charles | Senior Vice President | Tax withholding | 28 | $44.50 | $1K | 32K |
| 2025-09-05 | Donoso Diego | Director | Buy | 15 | $45.81 | $687 | 9K |
| 2025-08-14 | Swan Renee | Chief People Officer | Tax withholding | 5K | $45.18 | $226K | 45K |
| 2025-08-13 | Donoso Diego | Director | Buy | 25 | $45.00 | $1K | 9K |
| 2025-05-20 | TAYLOR STUART A II | Director | Grant | 4K | $0.00 | $0 | 9K |
| 2025-05-20 | Macadam Stephen E. | Director | Grant | 4K | $0.00 | $0 | 36K |
| 2025-05-20 | Leipold Jane A | Director | Grant | 4K | $0.00 | $0 | 18K |
| 2025-05-20 | HAGGERTY GRETCHEN R | Director | Grant | 4K | $0.00 | $0 | 24K |
| 2025-05-20 | Donoso Diego | Director | Grant | 4K | $0.00 | $0 | 9K |
| 2025-05-20 | Bennett Roy Edwin | Director | Grant | 4K | $0.00 | $0 | 17K |
| 2025-05-13 | Heltebran Laura | CLO & Corp Sec | Grant | 20K | $0.00 | $0 | 20K |
| 2025-04-02 | Donoso Diego | Director | Sell | 40 | $37.79 | $2K | 9K |
| 2025-04-01 | Disher Stephanie | Chief Executive Officer | Grant | 40K | $0.00 | $0 | 270K |
| 2025-04-01 | Kienzler Jack | Chief Financial Officer | Grant | 7K | $0.00 | $0 | 55K |
| 2025-04-01 | Masters Charles | Senior Vice President | Grant | 4K | $0.00 | $0 | 32K |
| 2025-04-01 | Swan Renee | Chief People Officer | Grant | 3K | $0.00 | $0 | 50K |
| 2025-03-03 | Disher Stephanie | Chief Executive Officer | Tax withholding | 3K | $39.80 | $108K | 233K |
| 2025-03-03 | Disher Stephanie | Chief Executive Officer | Tax withholding | 2K | $39.80 | $98K | 230K |
| 2025-03-03 | Kienzler Jack | Chief Financial Officer | Tax withholding | 456 | $39.80 | $18K | 48K |
| 2025-03-03 | Kienzler Jack | Chief Financial Officer | Tax withholding | 383 | $39.80 | $15K | 48K |
| 2025-03-03 | Masters Charles | Senior Vice President | Tax withholding | 570 | $39.80 | $23K | 28K |
| 2025-03-03 | Masters Charles | Senior Vice President | Tax withholding | 736 | $39.80 | $29K | 29K |
| 2025-02-17 | Kienzler Jack | Chief Financial Officer | Grant | 2K | $0.00 | $0 | 49K |
| 2025-02-17 | Masters Charles | Senior Vice President | Grant | 2K | $0.00 | $0 | 29K |
| 2025-02-17 | Disher Stephanie | Chief Executive Officer | Grant | 11K | $0.00 | $0 | 236K |
| 2024-10-03 | Masters Charles | VP, Engine Products | Tax withholding | 20 | $37.96 | $759 | 27K |
| 2024-10-03 | Masters Charles | VP, Engine Products | Grant | 87 | $0.00 | $0 | 27K |
| 2024-10-03 | Masters Charles | VP, Engine Products | Tax withholding | 26 | $37.96 | $987 | 27K |
| 2024-10-03 | Kienzler Jack | Chief Financial Officer | Tax withholding | 22 | $37.96 | $835 | 47K |
| 2024-10-03 | Kienzler Jack | Chief Financial Officer | Grant | 87 | $0.00 | $0 | 47K |
| 2024-08-23 | HAGGERTY GRETCHEN R | Director | Buy | 6K | $34.20 | $200K | 20K |
| 2024-08-14 | Swan Renee | Chief People Officer | Tax withholding | 4K | $32.78 | $116K | 47K |
| 2024-08-07 | Macadam Stephen E. | Director | Buy | 8K | $31.56 | $260K | 32K |
| 2024-05-14 | TAYLOR STUART A II | Director | Grant | 5K | $0.00 | $0 | 5K |
| 2024-05-14 | Donoso Diego | Director | Grant | 5K | $0.00 | $0 | 5K |
| 2024-05-14 | Leipold Jane A | Director | Grant | 5K | $0.00 | $0 | 14K |
| 2024-05-14 | HAGGERTY GRETCHEN R | Director | Grant | 5K | $0.00 | $0 | 14K |
| 2024-05-14 | Bennett Roy Edwin | Director | Grant | 5K | $0.00 | $0 | 13K |
| 2024-05-14 | Macadam Stephen E. | Director | Grant | 5K | $0.00 | $0 | 24K |
| 2024-04-16 | Kienzler Jack | Chief Financial Officer | Grant | 186 | $0.00 | $0 | 47K |
| 2024-04-16 | Masters Charles | VP, Engine Products | Grant | 186 | $0.00 | $0 | 27K |
| 2024-04-16 | Hickey Toni | Chief Legal Officer | Grant | 186 | $0.00 | $0 | 26K |
| 2024-04-01 | Disher Stephanie | Chief Executive Officer | Grant | 38K | $0.00 | $0 | 225K |
| 2024-04-01 | Kienzler Jack | Chief Financial Officer | Grant | 9K | $0.00 | $0 | 47K |
| 2024-04-01 | Masters Charles | VP, Engine Products | Grant | 5K | $0.00 | $0 | 27K |
| 2024-04-01 | Hickey Toni | Chief Legal Officer | Grant | 4K | $0.00 | $0 | 25K |
| 2024-04-01 | Swan Renee | Chief People Officer | Grant | 4K | $0.00 | $0 | 50K |
| 2024-03-18 | Satterthwaite Tony | Director | Other transaction | 4K | price not stated in the filing | not stated | 4K |
| 2024-03-18 | CUMMINS INC | TenPercentOwner | Other transaction | 67.1M | price not stated in the filing | not stated | 0 |
| 2024-03-18 | TAYLOR STUART A II | Director | Grant | 627 | $0.00 | $0 | 627 |
| 2024-03-18 | Donoso Diego | Director | Grant | 627 | $0.00 | $0 | 627 |
| 2024-03-01 | Masters Charles | VP, Engine Products | Tax withholding | 1K | $23.96 | $25K | 22K |
| 2024-03-01 | Masters Charles | VP, Engine Products | Tax withholding | 245 | $23.96 | $6K | 23K |
| 2024-03-01 | Masters Charles | VP, Engine Products | Grant | 704 | $0.00 | $0 | 23K |
| 2024-03-01 | Hickey Toni | Chief Legal Officer | Tax withholding | 152 | $23.96 | $4K | 22K |
| 2024-03-01 | Hickey Toni | Chief Legal Officer | Tax withholding | 643 | $23.96 | $15K | 21K |
| 2024-03-01 | Hickey Toni | Chief Legal Officer | Grant | 512 | $0.00 | $0 | 22K |
| 2024-03-01 | Kienzler Jack | Chief Financial Officer | Grant | 512 | $0.00 | $0 | 39K |
| 2024-03-01 | Kienzler Jack | Chief Financial Officer | Tax withholding | 753 | $23.96 | $18K | 38K |
| 2024-03-01 | Kienzler Jack | Chief Financial Officer | Tax withholding | 178 | $23.96 | $4K | 39K |
| 2024-03-01 | Disher Stephanie | Chief Executive Officer | Tax withholding | 3K | $23.96 | $62K | 186K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON5 Form 144 notices on file for ATMU worth $1.8M at the prices reported; 1 in the last 90 days worth $197K. Latest: Swan Renee filed on 2026-08-17 to sell 3,870 shares ($197K) from 2026-08-17.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-08-17 | Swan ReneeOfficer | 4K | $197K | 0.005% | 2026-08-17 | Fidelity Brokerage Services LLC |
| 2026-06-01 | Kienzler JackOfficer | 5K | $232K | 0.006% | 2026-06-01 | Fidelity Brokerage Services LLC |
| 2026-06-01 | Disher StephanieOfficer, Director | 26K | $1.2M | 0.031% | 2026-06-01 | Fidelity Brokerage Services LLC |
| 2026-06-01 | Swan ReneeOfficer | 3K | $116K | 0.003% | 2026-06-01 | Fidelity Brokerage Services LLC |
| 2026-06-01 | Masters CharlesOfficer | 3K | $131K | 0.004% | 2026-06-01 | Fidelity Brokerage Services LLC |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON7 holders report 5% or more of ATMU in their latest filing, all on Schedule 13G (passive). The largest reported stake is BlackRock, Inc. at 14.2% of the class (11,570,977 shares), filed 2026-05-06 for an event on 2026-04-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-13 | 13G | Invesco Ltd.parent holding company, investment adviser | 4.5M | 5.5% | 2026-06-30 |
| 2026-08-06 | 13G/Ano. 1 | FMR LLCparent holding company | 5.3M | 6.5% | 2026-06-30 |
| 2026-08-06 | 13G/Ano. 1 | Abigail P. Johnsonindividual | 5.3M | 6.5% | 2026-06-30 |
| 2026-07-31 | 13G | Vanguard Portfolio Managementinvestment adviser | 4.7M | 5.7% | 2026-06-30 |
| 2026-05-06 | 13G/Ano. 1 | BlackRock, Inc.parent holding company | 11.6M | 14.2% | 2026-04-30 |
| 2026-04-29 | 13G | Vanguard Capital Managementinvestment adviser | 4.2M | 5.1% | 2026-03-31 |
| 2026-03-26 | 13G/Ano. 1 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-17 | 13G/Ano. 2 | Eminence Capital, LPinvestment adviser, partnership | 3.8M | 4.7% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 2 | Ricky C. Sandlerparent holding company, individual | 3.8M | 4.7% | 2025-12-31 |
| 2026-02-17 | 13G | T. Rowe Price Associates, Inc.investment adviser | 4.7M | 5.7% | 2025-12-31 |
13F holders
Tracked managers holding ATMU at their latest 13F. JSON4 of the 30 tracked managers held ATMU at their latest 13F, $35.1M in total at quarter-end prices. D. E. Shaw & Co. is the largest at $24.6M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 0 added shares and 4 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| D. E. Shaw & Co. | 2026-06-30 | 482K | $24.6M | 0.01% | -1.1M |
| AQR Capital Management | 2026-06-30 | 89K | $4.6M | 0.00% | -21K |
| Citadel Advisors | 2026-06-30 | 87K | $4.5M | 0.00% | -143K |
| Two Sigma Investments | 2026-06-30 | 30K | $1.5M | 0.00% | -56K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
Atmus Filtration Technologies in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Atmus Filtration Technologies (ATMU), SEC CIK 1921963, listed on NYSE, classified by the SEC as motor vehicle parts & accessories. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-09.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-08-17.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-13.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-07.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-08-17.JSON and CSV
- Company record
- EDGAR filing index for CIK 1921963Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of ATMU is sold short?
3,358,055 shares were held short at the 2026-10-15 settlement, 4.9 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is ATMU's daily short volume?
On 2026-11-02, 205,260 of the 327,110 ATMU shares reported to FINRA were sold short, 62.7% of the day's reported volume. Short volume is a flow for one day, not a position.
Does ATMU have fails to deliver?
The SEC's latest file shows 1 ATMU shares failed to deliver at settlement 2026-10-09. Fails are reported per settlement date and published twice a month with a lag.
Are ATMU insiders buying or selling?
Over the last 90 days ATMU insiders reported 1 open-market buy ($100K) against 1 sell ($197K), so the dollar flow leans toward selling. Latest filing: Swan Renee (Chief People Officer) on 2026-08-17.
Have ATMU insiders filed to sell?
5 Form 144 notices on file for ATMU worth $1.8M at the prices reported; 1 in the last 90 days worth $197K. Latest: Swan Renee filed on 2026-08-17 to sell 3,870 shares ($197K) from 2026-08-17.
Who owns 5% or more of ATMU?
7 holders report 5% or more of ATMU in their latest filing, all on Schedule 13G (passive). The largest reported stake is BlackRock, Inc. at 14.2% of the class (11,570,977 shares), filed 2026-05-06 for an event on 2026-04-30.
Which tracked 13F managers own ATMU?
4 of the 30 tracked 13F managers held ATMU shares at their latest filing, $35.1M in all. The largest: D. E. Shaw & Co. (482K shares, $24.6M), Cliff Asness's AQR Capital Management (89K shares, $4.6M), Ken Griffin's Citadel Advisors (87K shares, $4.5M), Two Sigma Investments (30K shares, $1.5M).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.