BACKBLAZE INC

Ticker: BLZE CUSIP: 05637B105 Class: Common Stock

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q4 2025

Shares 9,771 Value ($000) $46 Avg Close $6.85 Range $4.13 - $10.86

Q2 2025

Shares 8,162 Value ($000) $45 Avg Close $5.08 Range $3.94 - $6.14

Q1 2025

Shares 8,662 Value ($000) $42 Avg Close $6.16 Range $4.71 - $7.83

Q4 2024

Shares 16,965 Value ($000) $102 Avg Close $6.79 Range $5.50 - $8.08

Q1 2022

Shares 4,000 Value ($000) $43 Avg Close $12.49 Range $8.75 - $18.16

Q4 2021

Shares 2,000 Value ($000) $34 Avg Close $22.16 Range $16.50 - $36.50

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	9,771	$46	$6.85	$4.13 - $10.86
Q2 2025	8,162	$45	$5.08	$3.94 - $6.14
Q1 2025	8,662	$42	$6.16	$4.71 - $7.83
Q4 2024	16,965	$102	$6.79	$5.50 - $8.08
Q1 2022	4,000	$43	$12.49	$8.75 - $18.16
Q4 2021	2,000	$34	$22.16	$16.50 - $36.50