ATMUS FILTRATION TECHNOLOGIE

Ticker: ATMU CUSIP: 04956D107 Class: Common Stock

FRONTIER CAPITAL MANAGEMENT CO LLC's Holding History (CIK: 0000351173)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 653,554 Value ($000) $33,926 Avg Close $48.33 Range $42.52 - $54.79

Q3 2025

Shares 368,626 Value ($000) $16,621 Avg Close $41.84 Range $35.97 - $47.01

Q2 2025

Shares 339,303 Value ($000) $12,357 Avg Close $35.53 Range $30.80 - $38.98

Q1 2025

Shares 251,770 Value ($000) $9,248 Avg Close $39.25 Range $35.50 - $43.83

Q4 2024

Shares 352,526 Value ($000) $13,812 Avg Close $40.32 Range $36.62 - $45.16

Q3 2024

Shares 207,983 Value ($000) $7,806 Avg Close $32.39 Range $27.48 - $37.69

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	653,554	$33,926	$48.33	$42.52 - $54.79
Q3 2025	368,626	$16,621	$41.84	$35.97 - $47.01
Q2 2025	339,303	$12,357	$35.53	$30.80 - $38.98
Q1 2025	251,770	$9,248	$39.25	$35.50 - $43.83
Q4 2024	352,526	$13,812	$40.32	$36.62 - $45.16
Q3 2024	207,983	$7,806	$32.39	$27.48 - $37.69