Eric S. Marmurek - 16 Sep 2021 Form 4 Insider Report for Ribbon Communications Inc. (RBBN)

Role: SVP, Finance & CAO
Signature: Patrick Macken, Attorney-in-Fact
Issuer symbol: RBBN
Transactions as of: 16 Sep 2021
Net transactions value: -$23,594
Form type: 4
Filing time: 17 Sep 2021, 16:08:16 UTC
Next filing: 19 Oct 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RBBN	Common Stock	Options Exercise		+15,432	+25%		76,932	16 Sep 2021	Direct	F1
transaction	RBBN	Common Stock	Tax liability	$23,594	-3,757	-4.9%	$6.28	73,175	16 Sep 2021	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	RBBN	Restricted Stock Units (RSU)	Options Exercise	$0	-15,432	-25%	$0.000000	46,296	16 Sep 2021	Common Stock	15,432		Direct	F1, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	RSUs convert to Common Stock on a one-for-one basis.
F2	Reflects shares of Common stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of RSUs.
F3	The RSU vested as to one third on 3/16/2021, and the remaining two thirds of the RSUs vest in four equal semi-annual installments thereafter through March 16, 2023.