Michael Millegan - 13 Dec 2021 Form 4 Insider Report for CoreSite Realty Corp (COR)

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	COR	Restricted Stock Units	Award	$0	+14	+0.75%	$0.000000	1,893	13 Dec 2021	Common Stock	14		Direct	F1, F2, F3

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

Id	Content
F1	Each Restricted Stock Unit ("RSU") represents the right to receive one share of common stock of the issuer. The reporting person also holds a tandem dividend equivalent for each RSU held, which gives the reporting person the right to receive, upon the payment of any ordinary quarterly cash dividend paid to holders of common stock of the issuer, an equivalent payment in the form of additional RSUs based on the fair market value of the issuer's common stock on the date of payment.
F2	Three (3) RSUs vested immediately with the remaining RSUs vesting on the earlier of (a) May 19, 2022 or (b) the day before the issuer's next annual meeting of stockholders. In addition, pursuant to a deferral election made by the reporting person, the RSUs are payable upon the earliest of (i) the reporting person's separation from service with the issuer, (ii) the reporting person's death or (iii) the date of a change in control of the issuer.
F3	The RSUs have no expiration date.