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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1708055	Ribbon Communications Inc.	RBBN	Services-Computer Integrated Systems Design (7373)	821669692

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1720721	S Eric Marmurek	C/O Ribbon Communications Inc. 4 Technology Park Drive Westford MA 01886	Svp And Cao	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2020-04-15	12,113	$0.00	42,861	No	4	M	Direct
Common Stock	Disposition	2020-04-15	3,422	$2.92	39,439	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Restricted Stock Units	Disposition	2020-04-15	12,113	$0.00	12,113	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
24,225			No	4	M	Direct

Footnotes

Restricted stock units (RSUs) convert into common stock on a one-for-one basis.
The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 instruction letter previously adopted by the Reporting Person and represent shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of RSUs.
The RSUs vest over a three-year period as follows: one-third of the shares vested on April 15, 2020, and the remaining two-thirds of the shares will vest in four equal increments semi-annually thereafter through April 15, 2022.