RIBBON COMMUNICATIONS INC

Ticker: RBBN CUSIP: 762544104 Class: Common Stock

MARTINGALE ASSET MANAGEMENT L P's Holding History (CIK: 0000936944)

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

Q3 2020

Shares 25,966 Value ($000) $101 Avg Close $4.22 Range $3.61 - $5.64

Q2 2020

Shares 198,152 Value ($000) $779 Avg Close $3.63 Range $2.67 - $4.68

Q1 2020

Shares 199,352 Value ($000) $605 Avg Close $3.01 Range $1.95 - $3.68

Q4 2019

Shares 208,152 Value ($000) $646 Avg Close $3.98 Range $2.44 - $5.92

Q3 2019

Shares 44,646 Value ($000) $261 Avg Close $5.25 Range $4.79 - $5.93

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2020	25,966	$101	$4.22	$3.61 - $5.64
Q2 2020	198,152	$779	$3.63	$2.67 - $4.68
Q1 2020	199,352	$605	$3.01	$1.95 - $3.68
Q4 2019	208,152	$646	$3.98	$2.44 - $5.92
Q3 2019	44,646	$261	$5.25	$4.79 - $5.93