ALLEGRO MICROSYSTEMS INC

Ticker: ALGM CUSIP: 01749D105 Class: Common Stock

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

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

Q4 2025

Shares 524,931 Value ($000) $13,848 Avg Close $27.52 Range $22.41 - $33.84

Q3 2025

Shares 895,797 Value ($000) $26,157 Avg Close $32.34 Range $28.85 - $38.45

Q2 2025

Shares 2,365,957 Value ($000) $80,892 Avg Close $24.91 Range $16.38 - $34.30

Q1 2025

Shares 2,909,737 Value ($000) $73,122 Avg Close $24.96 Range $21.16 - $29.45

Q4 2024

Shares 91,194 Value ($000) $1,994 Avg Close $21.30 Range $18.59 - $24.14

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	524,931	$13,848	$27.52	$22.41 - $33.84
Q3 2025	895,797	$26,157	$32.34	$28.85 - $38.45
Q2 2025	2,365,957	$80,892	$24.91	$16.38 - $34.30
Q1 2025	2,909,737	$73,122	$24.96	$21.16 - $29.45
Q4 2024	91,194	$1,994	$21.30	$18.59 - $24.14