ANNEXON INC

Ticker: ANNX CUSIP: 03589W102 Class: COM

SIRIOS CAPITAL MANAGEMENT L P's Holding History (CIK: 0001104883)

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

Q4 2025

Shares 710,256 Value ($000) $3,565 Avg Close $3.82 Range $2.54 - $5.48

Q3 2025

Shares 970,200 Value ($000) $2,959 Avg Close $2.48 Range $1.85 - $3.42

Q2 2025

Shares 989,577 Value ($000) $2,375 Avg Close $2.00 Range $1.28 - $2.82

Q1 2025

Shares 768,686 Value ($000) $1,484 Avg Close $3.33 Range $1.93 - $5.66

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	710,256	$3,565	$3.82	$2.54 - $5.48
Q3 2025	970,200	$2,959	$2.48	$1.85 - $3.42
Q2 2025	989,577	$2,375	$2.00	$1.28 - $2.82
Q1 2025	768,686	$1,484	$3.33	$1.93 - $5.66