KIMON MICHAELS - 23 Feb 2022 Form 4 Insider Report for PDF SOLUTIONS INC (PDFS)

Role: EVP OF PRODUCTS AND SOLUTIONS, Director
Signature: /s/ Kimon Michaels
Issuer symbol: PDFS
Transactions as of: 23 Feb 2022
Net transactions value: +$116,850
Form type: 4
Filing time: 25 Feb 2022, 16:54:06 UTC
Previous filing: 03 Feb 2022
Next filing: 05 Jul 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	PDFS	Common Stock	Options Exercise	$131,850	+15,000	+13%	$8.79^*	134,055	23 Feb 2022	By Spouse
transaction	PDFS	Common Stock	Sale		-8,850	-6.6%		125,205	23 Feb 2022	By Spouse	F1, F2
holding	PDFS	Common Stock						1,466,959	23 Feb 2022	Direct

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	PDFS	Stock Option (right to buy)	Options Exercise	$15,000				$0	23 Feb 2022	Commo Stock	15,000	$8.79	By Spouse	F3

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

Explanation of Responses:

Id	Content
F1	These shares were sold to cover the reporting person's option exercise price and tax withholding obligations.
F2	These shares were sold in multiple transactions at prices ranging from $24.53 to $25.51 per share, resulting in a weighted average sale price of $24.95 per share. These shares were sold to cover the reporting person's option exercise price and tax withholding obligations.
F3	1/48th of the total shares subject to the option vested on June 22, 2012 and 1/48th of the options continued vesting monthly thereafter, until fully vested on May 22, 2016.