RIBBON COMMUNICATIONS INC

Ticker: RBBN CUSIP: 762544104 Class: Common Stock

MACKAY SHIELDS LLC's Holding History (CIK: 0000061227)

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

Q1 2021

Shares 70,600 Value ($000) $580 Avg Close $8.28 Range $6.22 - $11.25

Q4 2020

Shares 117,600 Value ($000) $771 Avg Close $5.28 Range $3.62 - $7.49

Q3 2020

Shares 265,900 Value ($000) $1,029 Avg Close $4.22 Range $3.61 - $5.64

Q2 2020

Shares 496,100 Value ($000) $1,949 Avg Close $3.63 Range $2.67 - $4.68

Q1 2020

Shares 362,600 Value ($000) $1,098 Avg Close $3.01 Range $1.95 - $3.68

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	70,600	$580	$8.28	$6.22 - $11.25
Q4 2020	117,600	$771	$5.28	$3.62 - $7.49
Q3 2020	265,900	$1,029	$4.22	$3.61 - $5.64
Q2 2020	496,100	$1,949	$3.63	$2.67 - $4.68
Q1 2020	362,600	$1,098	$3.01	$1.95 - $3.68