SILICON LABORATORIES INC

Ticker: SLAB CUSIP: 826919102 Class: Common Stock

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q4 2025

Shares 547,403 Value ($000) $71,546 Avg Close $131.47 Range $115.51 - $146.62

Q3 2025

Shares 342,310 Value ($000) $44,887 Avg Close $136.18 Range $119.59 - $153.71

Q1 2025

Shares 330,897 Value ($000) $37,249 Avg Close $135.11 Range $109.91 - $160.00

Q1 2014

Shares 202,890 Value ($000) $10,601 Avg Close $48.31 Range $41.19 - $54.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	547,403	$71,546	$131.47	$115.51 - $146.62
Q3 2025	342,310	$44,887	$136.18	$119.59 - $153.71
Q1 2025	330,897	$37,249	$135.11	$109.91 - $160.00
Q1 2014	202,890	$10,601	$48.31	$41.19 - $54.00