SPERO THERAPEUTICS INC

Ticker: SPRO CUSIP: 84833T103 Class: COM

Pfizer Inc's Holding History (CIK: 0000078003)

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

Q4 2025

Shares 2,362,348 Value ($000) $5,504 Avg Close $2.32 Range $1.89 - $2.75

Q3 2025

Shares 2,362,348 Value ($000) $4,441 Avg Close $2.20 Range $1.80 - $3.22

Q2 2025

Shares 2,362,348 Value ($000) $6,851 Avg Close $1.44 Range $0.51 - $3.09

Q1 2025

Shares 2,362,348 Value ($000) $1,701 Avg Close $0.84 Range $0.70 - $1.13

Q4 2024

Shares 2,362,348 Value ($000) $2,433 Avg Close $1.19 Range $0.92 - $1.36

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	2,362,348	$5,504	$2.32	$1.89 - $2.75
Q3 2025	2,362,348	$4,441	$2.20	$1.80 - $3.22
Q2 2025	2,362,348	$6,851	$1.44	$0.51 - $3.09
Q1 2025	2,362,348	$1,701	$0.84	$0.70 - $1.13
Q4 2024	2,362,348	$2,433	$1.19	$0.92 - $1.36