X0306 5 2012-12-31 0 0 1 0001044435 ACTIVE POWER INC ACPW 0001318924 Penver John K C/O ACTIVE POWER, INC. 2128 W. BRAKER LANE, BK12 AUSTIN TX 78758 0 1 0 0 Chief Financial Officer Common Stock 2012-05-17 4 M 0 L 563 A 11881 D Common Stock 2012-05-17 4 F 0 L 148 3.85 D 11733 D Common Stock 2012-08-17 4 M 0 L 563 A 12296 D Common Stock 2012-08-17 4 F 0 L 148 4.20 D 12148 D Restricted Stock Units 2012-05-17 4 M 0 L 563 0 D Common Stock 563 8437 D Restricted Stock Units 2012-08-17 4 M 0 L 563 0 D Common Stock 563 7874 D Shares issued upon the vesting of restricted stock units. All amounts included herein have been adjusted to reflect the reverse stock split of Active Power Inc.'s outstanding Common Stock at a reverse split ratio of five-for-one effective as of 5:00 p.m. EST on December 21, 2012. Each restricted stock unit represents a contingent right to receive one share of common stock. With continued service, the restricted stock units, representing a right to receive a total of 9,000 shares, vest in a series of sixteen equal quarterly installments upon the completion of each quarter beginning in 5/17/2012. Vested shares are delivered to the reporting person as soon as practicable after vesting, but in each case within the period ending no later than the later of the 15th day of the 3rd month following the end of the (i) fiscal year or the (ii) calendar year, which in either case includes the vesting date. John K. Penver 2013-02-12