Sam Bucci - 15 Sep 2021 Form 4 Insider Report for Ribbon Communications Inc. (RBBN)

Role: EVP & GM IP Optical Networks
Signature: Patrick Macken, Attorney-in-Fact
Issuer symbol: RBBN
Transactions as of: 15 Sep 2021
Net transactions value: -$450,958
Form type: 4
Filing time: 17 Sep 2021, 16:08:47 UTC
Next filing: 16 Mar 2022
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		+129,717	+224%		187,664	15 Sep 2021	Direct	F1
transaction	RBBN	Common Stock	Tax liability	$358,592	-57,283	-31%	$6.26	130,381	15 Sep 2021	Direct	F2
transaction	RBBN	Common Stock	Options Exercise		+33,413	+26%		163,784	15 Sep 2021	Direct	F1
transaction	RBBN	Common Stock	Tax liability	$92,366	-14,755	-9%	$6.26	149,039	15 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	-129,717	-100%	$0.000000^*	0	15 Sep 2021	Common Stock	129,717		Direct	F1, F3
transaction	RBBN	Restricted Stock Unit	Options Exercise	$0	-33,413	-33%	$0.000000	66,823	15 Sep 2021	Common Stock	33,413		Direct	F1, F4

* 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 the RSUs.
F3	The RSU vested in full on 9/15/2021.
F4	The RSUs vested as to one/third on 9/15/2021, and the remaining two-thirds of the RSUs vest in four equal semi-annual installments thereafter through September 15, 2023.