DZS INC

Ticker: DZSIQ CUSIP: 268211109 Class: Common Stock

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

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

Q3 2021

Shares 400 Value ($000) $5 Avg Close — Range —

Q2 2021

Shares 400 Value ($000) $8 Avg Close — Range —

Q1 2021

Shares 400 Value ($000) $6 Avg Close — Range —

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2021	400	$5	—	—
Q2 2021	400	$8	—	—
Q1 2021	400	$6	—	—