RIBBON COMMUNICATIONS INC

Ticker: RBBN CUSIP: 762544104 Class: Common Stock

Capital Research Global Investors's Holding History (CIK: 0001422848)

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

Q1 2018

Shares 1,044,300 Value ($000) $5,326 Avg Close $6.47 Range $5.01 - $7.93

Q4 2017

Shares 1,395,540 Value ($000) $10,788 Avg Close $7.68 Range $6.89 - $9.05

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2018	1,044,300	$5,326	$6.47	$5.01 - $7.93
Q4 2017	1,395,540	$10,788	$7.68	$6.89 - $9.05