Matthew Slepian - Sep 11, 2022 Form 4 Insider Report for Casa Systems Inc (CASA)

Role: Corporate Controller
Signature: /s/ Timothy C. Rodenberger, as Attorney-in-Fact
Stock symbol: CASA
Transactions as of: Sep 11, 2022
Transactions value $: -$3,796
Form type: 4
Date filed: 9/13/2022, 04:09 PM
Previous filing: May 11, 2022
Next filing: Jan 4, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CASA	Common Stock	Options Exercise		+3.43K	+14.66%		26.9K	Sep 11, 2022	Direct	F1
transaction	CASA	Common Stock	Tax liability	-$3.8K	-1.01K	-3.75%	$3.77	25.8K	Sep 11, 2022	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	CASA	Restricted Stock Units	Options Exercise	$0	-3.43K	-50%	$0.00	3.43K	Sep 11, 2022	Common Stock	3.43K		Direct	F1, F3, F4

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

Explanation of Responses:

Id	Content
F1	Each Restricted Stock Unit ("RSU") represents the right to receive one share of common stock, $0.001 par value per share (the "Common Stock") of Casa Systems, Inc. (the "Company") upon vesting, subject to the reporting person's continued service relationship with the Company and the other terms and conditions set forth in the applicable RSU agreement. In the sole discretion of the Company's board of directors, the Company may, with respect to any applicable vesting date, deliver to the reporting person Common Stock or cash having a fair market value equal to the number of shares of Common Stock underlying the portion of the RSU that vested on such date, payable within 30 days of the vesting date, less applicable taxes.
F2	Shares withheld by the Company to satisfy tax withholding requirements on vesting of RSUs. No shares were sold.
F3	These RSUs are scheduled to vest over four years, with 25% of the 13,736 shares underlying the award having vested on September 11, 2020, and 25% of the shares underlying the award vesting at the end of each successive one-year period thereafter. The RSUs have no expiration date.
F4	Due to an administrative error, the reporting person filed a Form 4 on September 14, 2021 that inadvertently added the RSUs that vested in the reported transaction to the total number of derivative securities held by the reporting person following the reported transaction, rather than subtracting from such total. This resulted in an overstatement of the number of derivative securities held by the reporting person following the reported transaction by 6,868 shares. This Form 4 corrects such error.