Forrester has authorized 500,000 shares of $0.01 par value preferred stock. The Board of Directors has full authority to issue this stock and to fix the voting powers, preferences, rights, qualifications, limitations, or restrictions thereof, including dividend rights, conversion rights, redemption privileges and liquidation preferences and the number of shares constituting any series or designation of such series.

Through 2018, Forrester’s Board of Directors has authorized an aggregate $535.0 million to purchase common stock under the Company’s stock repurchase program including $50.0 million authorized in February 2018. The shares repurchased may be used, among other things, in connection with Forrester’s equity incentive and purchase plans. As of December 31, 2018, the Company had repurchased approximately 16.3 million shares of common stock at an aggregate cost of $474.9 million.

During the years ended December 31, 2018, 2017 and 2016, the Company declared and paid four quarterly dividends of $0.20, $0.19 and $0.18 per share each quarter, respectively, amounting to $0.80 per share or $14.5 million, $0.76 per share or $13.6 million and $0.72 per share or $13.0 million, respectively.

Forrester maintains the following two equity incentive plans: the Forrester Research, Inc. Amended and Restated Equity Incentive Plan (the “Equity Incentive Plan” and previously the “2006 Plan”) and the 2006 Stock Option Plan for Directors, as amended (the “2006 Directors’ Plan”). Upon approval of an amendment to the 2006 Plan by stockholders in 2012, no future awards under the 2006 Directors’ Plan could be granted or issued. In May 2016, the stockholders of the Company approved an amendment and restatement of the Company’s 2006 Plan. The amendment and restatement resulted in (1) extending the term of the plan for 10 years until May 2026, (2) increasing the number of shares issuable under the plan by 2,000,000 shares, (3) establishing a maximum amount of awards issuable under the plan to the Company’s non-employee directors, and (4) changing the name of the plan to the Forrester Research, Inc. Amended and Restated Equity Incentive Plan.

The Equity Incentive Plan provides for the issuance of stock-based awards, including incentive stock options (“ISOs”), non-qualified stock options (“NSOs”), and restricted stock units (“RSUs”) to purchase up to 6,350,000 shares authorized in the plan, 80,000 shares returned from the 2006 Directors’ Plan and 713,275 shares returned from a prior plan. Under the terms of the Equity Incentive Plan, ISOs may not be granted at less than fair market value on the date of grant (and in no event less than par value). Options and RSUs generally vest annually over four years and options expire after 10 years. Beginning in 2017, RSUs granted to non-employee directors vest quarterly over one year. Options and RSUs granted under the Equity Incentive Plan immediately vest upon certain events, as described in the plan. As of December 31, 2018, approximately 2.5 million shares were available for future grant of awards under the Equity Incentive Plan.

The 2006 Directors’ Plan provided for the issuance of options to purchase up to 450,000 shares of common stock. As of December 31, 2018, approximately 36,000 options remain outstanding and are fully vested under the 2006 Directors’ Plan.

Restricted stock units (“RSUs”) represent the right to receive one share of Forrester common stock when the restrictions lapse and the vesting conditions are met, and are valued on the date of grant based upon the value of the Company’s stock on the date of grant less the present value of dividends expected to be paid during the requisite service period. Shares of Forrester’s common stock will be delivered to the grantee upon vesting, subject to a reduction of shares for payment of withholding taxes. The weighted average grant date fair value for RSUs granted in 2018, 2017 and 2016 was $43.71, $39.73 and $37.87, respectively. The value of RSUs vested and converted to common stock, based on the value of Forrester’s common stock on the date of vesting, was $9.1 million, $8.7 million and $6.6 million during 2018, 2017 and 2016, respectively.

RSU activity for the year ended December 31, 2018 is presented below (in thousands, except per share data):

				Weighted-
				Average
	Number of			Grant Date
	Shares			Fair Value
Unvested at December 31, 2017		509		$	37.59
Granted		261			43.71
Vested		(198	)		37.12
Forfeited		(75	)		38.31
Unvested at December 31, 2018		497		$	40.89

Stock option activity for the year ended December 31, 2018 is presented below (in thousands, except per share data and contractual term):

				Weighted -		Weighted -
				Average		Average
				Exercise		Remaining		Aggregate
	Number			Price Per		Contractual		Intrinsic
	of Shares			Share		Term (in years)		Value
Outstanding at December 31, 2017		937		$	35.10
Granted		—			—
Exercised		(319	)		34.83
Forfeited		(35	)		34.78
Outstanding at December 31, 2018		583		$	35.27		4.82	$	5,496
Exercisable at December 31, 2018		488		$	35.40		4.44	$	4,545
Vested and expected to vest at December 31, 2018		583		$	35.27		4.82	$	5,496

The total intrinsic value of options exercised during 2018, 2017 and 2016 was $3.3 million, $4.5 million and $3.7 million, respectively.

In May 2018, stockholders of the Company approved an amendment to the Company’s Amended and Restated Employee Stock Purchase Plan (the “Stock Purchase Plan”), which provided for an additional 400,000 shares of common stock, par value $0.01 per share, to be granted under the plan. The Stock Purchase Plan provides for the issuance of up to 1.1 million shares of common stock and as of December 31, 2018, approximately 0.5 million shares remain available for issuance. With certain limited exceptions, all employees of Forrester whose customary employment is more than 20 hours per week, including officers and directors who are employees, are eligible to participate in the Stock Purchase Plan. Purchase periods under the Stock Purchase Plan are six months in length and commence on each successive March 1 and September 1. Stock purchased under the Stock Purchase Plan is required to be held for one year before it is able to be sold. During each purchase period the maximum number of shares of common stock that may be purchased by an employee is limited to the number of shares equal to $12,500 divided by the fair market value of a share of common stock on the first day of the purchase period. An employee may elect to have up to 10% deducted from his or her compensation for the purpose of purchasing shares under the Stock Purchase Plan. The price at which the employee’s shares are purchased is the lower of: (a) 85% of the closing price of the common stock on the day that the purchase period commences, or (b) 85% of the closing price of the common stock on the day that the purchase period terminates.

Shares purchased by employees under the Stock Purchase Plan are as follows (in thousands, except per share data):

	Shares		Purchase
Purchase Period Ended	Purchased		Price
February 28, 2018		27	$	34.43
August 31, 2018		28	$	34.21
February 28, 2017		24	$	31.03
August 31, 2017		26	$	31.71