X0306 4 2017-12-18 0 0000758938 QUALSTAR CORP QBAK 0001000383 BRONSON STEVEN N C/O QUALSTAR CORPORATION 130 WEST COCHRAN STREET, UNIT C WESTLAKE VILLAGE CA 91361 1 1 1 0 COB, CEO, President 0000009235 BKF CAPITAL GROUP INC C/O QUALSTAR CORPORATION 130 WEST COCHRAN STREET, UNIT C WESTLAKE VILLAGE CA 91361 0 0 1 0 0001626686 BKF Asset Holdings, Inc. C/O QUALSTAR CORPORATION 130 WEST COCHRAN STREET, UNIT C WESTLAKE VILLAGE CA 91361 0 0 1 0 Common Stock 2017-12-18 4 P 0 5000 7.50 A 14617 D Common Stock 2017-12-18 4 P 0 5000 7.60 A 5000 I By Mr. Bronson's spouse. Common Stock 2017-12-20 4 P 0 1482 7.80 A 6482 I By Mr. Bronson's spouse. Common Stock 2017-12-20 4 P 0 3518 7.9514 A 10000 I By Mr. Bronson's spouse. Common Stock 548085 I By BKF Asset Holdings, Inc. Common Stock 548085 I By BKF Capital Group, Inc. This Form 4 is filed jointly by BKF Capital Group, Inc. ("BKF Capital"), BKF Asset Holdings, Inc. ("BKF Holdings") and Steven N. Bronson (collectively, the "Reporting Persons"). Each of the Reporting Persons disclaims beneficial ownership of the shares of common stock reported herein except to the extent of his or its pecuniary interest therein. Represents shares of common stock owned directly by BKF Holdings. BKF Holdings is wholly owned by BKF Capital. Steven N. Bronson, as the Chairman, CEO and majority shareholder of BKF Capital and the CEO of BKF Holdings, may be deemed to be the beneficial owner of the shares of Qualstar Corporation held by BKF Holdings. Represents shares of common stock owned indirectly by BKF Capital through BFK Holdings. Steven N. Bronson, as the Chairman, CEO and majority shareholder of BKF Capital, may be deemed to be the beneficial owner of the shares of Qualstar Corporation indirectly held by BKF Capital. This Form 4 reflects a one-for-six reverse split of the Reporting Person's common stock which became effective on June 4, 2016. This transaction was executed in multiple trades at prices ranging from $7.92 to $7.9514. The price reported reflects the weighted average purchase price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder full information regarding the number of shares and prices at which the transaction was effected. /s/Steven N. Bronson 2017-12-20 /s/Steven N. Bronson, Chief Executive Officer of BKF Capital Group, Inc. 2017-12-20 /s/Steven N. Bronson, Chief Executive Officer of BKF Asset Holdings, Inc. 2017-12-20