RIBBON COMMUNICATIONS INC

Ticker: RBBN CUSIP: 762544104 Class: Common Stock

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

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

Q1 2022

Shares 45,678 Value ($000) $141 Avg Close $4.10 Range $2.74 - $6.42

Q4 2021

Shares 45,209 Value ($000) $274 Avg Close $5.93 Range $5.11 - $6.46

Q3 2021

Shares 46,123 Value ($000) $276 Avg Close $6.75 Range $5.80 - $7.78

Q2 2021

Shares 46,727 Value ($000) $356 Avg Close $7.65 Range $6.29 - $8.72

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2022	45,678	$141	$4.10	$2.74 - $6.42
Q4 2021	45,209	$274	$5.93	$5.11 - $6.46
Q3 2021	46,123	$276	$6.75	$5.80 - $7.78
Q2 2021	46,727	$356	$7.65	$6.29 - $8.72