Item 5. Market for Registrant’s Common Equity
Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.
Our common stock trades on the Nasdaq Global Select Market under the symbol ACLS. As of February 23, 2022, we had approximately 788 stockholders of record.
The following table summarizes the stock repurchase activity for the 12 months ended December 31, 2021 pursuant to our stock repurchase program, the authorization for which ended at December 31, 2021:
Total Number of Shares Purchased
Average Price Paid per Share
Total Number of Shares Purchased as Part of Publicly Announced Program
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Program
(in thousands except per share amounts)
January 1, 2021 through January 31, 2021
—
N/A
—
$
100,000
February 1, 2021 through February 28, 2021
—
N/A
—
100,000
March 1, 2021 through March 31, 2021
303
$38.41
303
88,362
April 1, 2021 through April 30, 2021
117
$43.35
117
83,290
May 1, 2021 through May 31, 2021
100
$39.74
100
79,316
June 1, 2021 through June 30, 2021
106
$40.74
106
74,997
July 1, 2021 through July 31, 2021
95
$37.23
95
71,461
August 1, 2021 through August 31, 2021
110
$43.16
110
66,713
September 1, 2021 through September 30, 2021
86
$49.12
86
62,489
October 1, 2021 through October 31, 2021
95
$48.66
95
57,863
November 1, 2021 through November 30, 2021
105
$60.50
105
51,508
December 1, 2021 through December 31, 2021
24
$63.38
24
$
-
Total
1,141
1,141
17
We currently maintain one equity compensation plan, the 2012 Equity Incentive Plan (the “2012 Equity Plan”). The number of shares issuable upon exercise of outstanding options and unvested restricted stock units granted to employees and non-employee directors, as well as the number of shares remaining available for future issuance, under our equity compensation plans as of December 31, 2021 are summarized in the following table:
(A)
(B)
(C)
Plan category
Number of shares to be issued upon exercise of outstanding options, warrants and rights (1)
Weighted ‑ average exercise price of outstanding options, warrants and rights (2)
Number of shares remaining available for future issuance under equity compensation plans (excluding shares reflected in column (A)) (3)
Equity compensation plans approved by stockholders
1,013,367
$ 1.48
2,427,867
Equity compensation plans not approved by stockholders
—
NA
NA
Total
1,013,367
2,427,867
Weighted average exercise price of outstanding options at December 31, 2021
$13.51
Weighted average remaining term of outstanding options at December 31, 2021
0.73 years
(1) Represents, as of December 31, 2021: (A) 111,249 shares issuable on exercise of outstanding options under the 2012 Equity Plan, plus (B) 902,118 shares issuable on vesting of outstanding RSUs under the 2012 Equity Plan (some of which will be withheld in respect of tax withholding obligations).
(2) For the purposes of this table, the weighted-average exercise price of outstanding options, warrants and rights includes RSUs as if they had a $0 exercise price. The weighted-average exercise price of outstanding options alone at December 31, 2021 was $13.51.
(3) Represents the total shares available for issuance under our 2012 Equity Plan and our Employee Stock Purchase Plan, as of December 31, 2021, as follows:
(A)
1,473,477 shares were available for future issuance under the 2012 Equity Plan. Such amount represents the total number of shares reserved for issuance under the 2012 Equity Plan ((7,762,500 shares approved by the shareholders, plus 1,777,029 shares added in accordance with the terms of the 2012 Equity Plan as a result of the expiration or forfeiture of awards granted under our prior equity grant plan that were outstanding at the time of the adoption of the 2012 Equity Plan), less the shares issuable on options and restricted stock units (counted at 1.5 shares each) outstanding under the 2012 Equity Plan included in column (A)) and the shares issued prior to such date on exercise of options and vesting of restricted stock units granted under the 2012 Equity Plan. This plan is generally used for grants to employees and directors and was approved by our stockholders at our 2012 annual meeting.
(B)
954,390 shares were available under our 2021 Employee Stock Purchase Plan, which represents the total number of shares reserved for issuance under the plan (1,000,000) less the shares purchased through December 31, 2021.
Item 6. [RESERVED]
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