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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1708055	Ribbon Communications Inc.	RBBN	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1550524	Anthony Scarfo	C/O Ribbon Communications Inc. 4 Technology Park Drive Westford MA 01886	Evp, Products & R&D	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	2019-12-16	2,500	$0.00	72,755	No	4	M	Direct
Common Stock	Disposition	2019-12-16	1,156	$2.80	71,599	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	2019-12-16	2,500	$0.00	2,500	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
7,499			No	4	M	Direct

Footnotes

Restricted stock units 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 restricted stock units.
15,000 restricted stock units were granted to the Reporting Person on June 15, 2018, vesting over a three-year period. One-third of those restricted stock units vested on June 17, 2019, one-sixth vested on December 16, 2019 and the remainder of the restricted stock units will vest in three equal, semi-annual installments thereafter through June 15, 2021