During 2020, Mid Penn announced the adoption of a treasury stock repurchase program authorizing the repurchase of up to $15,000,000 of Mid Penn’s outstanding common stock, which represents approximately 8.0% of the issued shares based on Mid Penn’s closing stock price and shares issued as of December 31, 2020. Under the treasury stock purchase program, Mid Penn may conduct repurchases of its common stock through open market transactions (which may be by means of a trading plan adopted under SEC Rule 10b5-1) or in privately negotiated transactions. Repurchases under the program are made at the discretion of management and are subject to market conditions and other factors. There is no guarantee as to the exact number of shares that Mid Penn may repurchase. The repurchase plan became effective March 19, 2020 and is authorized to continue through March 19, 2021, unless otherwise extended by Mid Penn’s Board of Directors.

The repurchase plan may be modified, suspended or terminated at any time, in Mid Penn’s discretion, based upon a number of factors, including liquidity, market conditions, the availability of alternative investment opportunities and other factors Mid Penn deems appropriate. The repurchase program does not obligate Mid Penn to repurchase any shares.

As of December 31, 2020, Mid Penn had repurchased 92,652 shares of common stock at an average price of $19.37 per share under the treasury stock repurchase program.

At the May 14, 2019 annual shareholder meeting, Mid Penn shareholders approved an amendment to the Articles of Incorporation to increase the number of authorized shares of common stock from 10,000,000 shares to 20,000,000 shares.

Under Mid Penn’s amended and restated dividend reinvestment plan (“DRIP”), 330,750 shares of Mid Penn’s authorized but unissued common stock are reserved for issuance. The DRIP also allows for voluntary cash payments, within specified limits, to be used for the purchase of additional shares.

Under Mid Penn’s 2014 Restricted Stock Plan, which was amended in 2020, Mid Penn may grant awards not exceeding, in the aggregate, 200,000 shares of common stock. The Plan was established for employees and directors of Mid Penn and the Bank, selected by the Compensation Committee of the Board of Directors, to align the interest of plan participants with those of Mid Penn’s shareholders. The plan provides those persons who have a responsibility for its growth with additional incentives by allowing them to acquire an ownership interest in Mid Penn and thereby encouraging them to contribute to the success of the company. As of December 31, 2020, 85,914 shares have been granted under the Plan, of which 2,446 shares were forfeited and available for reissuance. During 2020, Mid Penn granted 28,259 restricted shares, 19,759 of which were granted to employees, while 8,500 were granted to directors. As of December 31, 2019, 57,655 shares have been granted under the Plan, of which 2,346 shares were forfeited and available for reissuance. During 2019, Mid Penn granted 18,450 restricted shares, 11,650 of which were granted to employees, while 6,800 were granted to directors. Mid Penn granted 12,250 restricted shares in 2018, 7,450 of which were granted to employees, while 4,800 were granted to directors. During 2020, 100 shares were forfeited to Mid Penn due to the termination of employment of one plan participant. No restricted shares were forfeited in 2019. In 2018, 1,876 granted shares were forfeited to Mid Penn due to the termination of employment of three plan participants.

Share-based compensation expense relating to restricted stock is calculated using grant date fair value and is recognized on a straight-line basis over the vesting periods of the awards. Generally, restricted shares granted to employees vest in equal amounts on the anniversary of the grant date over a four-year vesting period, and the expense is a component of salaries and benefits expense on the Consolidated Statements of Income. Restricted shares granted to directors have a twelve-month vesting period, and the expense is a component of directors’ fees and benefits within the other expense line item on the Consolidated Statements of Income.

The following table presents compensation expense and related tax benefits for restricted stock awards recognized on the consolidated statements of income.

(Dollars in thousands)	2020			2019			2018
Compensation expense	$	414		$	346		$	267
Tax benefit		(87	)		(73	)		(56	)
Net income effect	$	327		$	273		$	211

At December 31, 2020 there was $726,000 of unrecognized compensation cost related to all non-vested share-based compensation awards. This cost is expected to be recognized through July 2024 with a weighted average recognition period of 2.6 years. At December 31, 2019, there was $630,000 of unrecognized compensation cost related to all non-vested share-based compensation awards. This cost was expected to be recognized through July 2023 with a weighted average recognition period of 2.9 years. Mid Penn recognizes the impact of forfeitures as of the forfeiture date.

The following table presents information regarding the non-vested restricted stock for the years ended December 31, 2020 and 2019.

	Shares			Weighted-Average Grant Date Fair Value
Non-vested at January 1, 2020		28,039		$	27.05
Vested		(14,771	)		25.89
Forfeited		(100	)		26.06
Granted		28,259			19.28
Non-vested at December 31, 2020		41,427			22.08

	Shares			Weighted-Average Grant Date Fair Value
Non-vested at January 1, 2019		20,226		$	28.76
Vested		(10,637	)		28.21
Forfeited		—			—
Granted		18,450			26.06
Non-vested at December 31, 2019		28,039			27.05