OSS insider transactions

Chief Financial Officer Gabel Daniel G. covered exercise/tax liability with 1,613 shares, decreasing direct ownership by 1% to 153,896 units (SEC Form 4) (for tax liability)

Director Bassett David George was granted 32,984 shares and sold $141,120 worth of shares (8,000 units at $17.64) (SEC Form 4) (withholding obligation)

Director Matz Gregory W was granted 11,984 shares and sold $140,160 worth of shares (8,000 units at $17.52), increasing direct ownership by 5% to 78,914 units (SEC Form 4) (for withholding tax)

Director Dumont Michael J. was granted 11,984 shares, increasing direct ownership by 11% to 119,833 units (SEC Form 4)

Director Herbets Mitchell H was granted 11,984 shares and sold $88,100 worth of shares (5,000 units at $17.62), increasing direct ownership by 17% to 48,984 units (SEC Form 4) (tax withholding)

Amendment: SEC Form 4 filed by Knowles Michael

CPO Ison James gifted 12,476 shares, received a gift of 12,476 shares, was granted 34,313 shares and covered exercise/tax liability with 9,666 shares, increasing direct ownership by 17% to 141,907 units (SEC Form 4)

Chief Financial Officer Gabel Daniel G. covered exercise/tax liability with 7,799 shares, decreasing direct ownership by 5% to 155,509 units (SEC Form 4)

Chief Executive Officer Knowles Michael covered exercise/tax liability with 19,948 shares, decreasing direct ownership by 3% to 648,058 units (SEC Form 4)

Chief Financial Officer Gabel Daniel G. was granted 55,239 shares, increasing direct ownership by 51% to 163,308 units (SEC Form 4)

Chief Executive Officer Knowles Michael was granted 101,862 shares, increasing direct ownership by 18% to 668,006 units (SEC Form 4)

Chief Financial Officer Gabel Daniel G. covered exercise/tax liability with 3,215 shares, decreasing direct ownership by 3% to 108,069 units (SEC Form 4)

Chief Executive Officer Knowles Michael covered exercise/tax liability with 19,075 shares, decreasing direct ownership by 3% to 566,144 units (SEC Form 4)

Chief Executive Officer Knowles Michael was granted 152,448 shares and covered exercise/tax liability with 44,234 shares, increasing direct ownership by 23% to 585,219 units (SEC Form 4)

CPO Ison James covered exercise/tax liability with 3,113 shares, gifted 4,271 shares and received a gift of 4,271 shares, decreasing direct ownership by 6% to 121,523 units (SEC Form 4)

SEC Form 3 filed by new insider Bassett David George

Director Herbets Mitchell H was granted 21,000 shares, increasing direct ownership by 100% to 42,000 units (SEC Form 4)

SEC Form 4 filed by Director Dumont Michael J.

Director Matz Gregory W was granted 21,000 shares, increasing direct ownership by 39% to 74,930 units (SEC Form 4)

CPO Ison James covered exercise/tax liability with 7,006 shares, gifted 7,760 shares and received a gift of 7,760 units of Common, decreasing direct ownership by 10% to 128,907 units (SEC Form 4)

Chief Financial Officer Gabel Daniel G. was granted 71,284 shares, increasing direct ownership by 178% to 111,284 units (SEC Form 4)

CPO Ison James was granted 44,279 shares, increasing direct ownership by 48% to 135,913 units (SEC Form 4)

Chief Executive Officer Knowles Michael covered exercise/tax liability with 17,525 shares, decreasing direct ownership by 4% to 477,530 units (SEC Form 4)

SEC Form 4 filed by Chief Financial Officer Morrison John W Jr.

Chief Financial Officer Gabel Daniel G. was granted 40,000 shares (SEC Form 4)

SEC Form 3 filed by new insider Gabel Daniel G.

CPO Ison James received a gift of 8,227 shares, covered exercise/tax liability with 4,440 shares and gifted 8,227 shares, decreasing direct ownership by 12% to 91,634 units (SEC Form 4)

Chief Financial Officer Morrison John W Jr. covered exercise/tax liability with 5,961 shares, decreasing direct ownership by 2% to 305,381 units (SEC Form 4)

CPO Ison James covered exercise/tax liability with 3,271 shares, gifted 6,062 shares and received a gift of 6,062 shares, decreasing direct ownership by 8% to 104,301 units (SEC Form 4)

Chief Financial Officer Morrison John W Jr. covered exercise/tax liability with 4,059 shares, decreasing direct ownership by 1% to 311,342 units (SEC Form 4)

Director Manko Joseph M. Jr. bought $146,750 worth of shares (75,000 units at $1.96) (SEC Form 4)

Director Potashner Kenneth F exercised 40,000 shares at a strike of $0.46, increasing direct ownership by 11% to 398,601 units (SEC Form 4)

CPO Ison James was granted 44,300 shares, increasing direct ownership by 64% to 113,634 units (SEC Form 4)

Chief Financial Officer Morrison John W Jr. was granted 71,300 shares, increasing direct ownership by 29% to 315,401 units (SEC Form 4)

Director Potashner Kenneth F was granted 21,000 shares, increasing direct ownership by 6% to 358,601 units (SEC Form 4)

Director Matz Gregory W was granted 21,000 shares, increasing direct ownership by 64% to 53,930 units (SEC Form 4)

Director Messinger Gioia was granted 21,000 shares, increasing direct ownership by 73% to 49,690 units (SEC Form 4)

Director Herbets Mitchell H was granted 21,000 shares (SEC Form 4)

Director Dumont Michael J. was granted 21,000 shares (SEC Form 4)

Chief Executive Officer Knowles Michael was granted 131,450 shares, increasing direct ownership by 36% to 494,530 units (SEC Form 4)

Director Manko Joseph M. Jr. was granted 21,000 shares (SEC Form 4)

Chief Executive Officer Knowles Michael covered exercise/tax liability with 38,050 shares, decreasing direct ownership by 9% to 363,080 units (SEC Form 4)

Ison James covered exercise/tax liability with 1,031 shares, gifted 1,469 shares and received a gift of 1,469 shares, decreasing direct ownership by 3% to 69,334 units (SEC Form 4)

Morrison John W Jr. covered exercise/tax liability with 1,257 shares, decreasing direct ownership by 0.51% to 244,101 units (SEC Form 4)

Potashner Kenneth F exercised 19,767 shares at a strike of $2.15, increasing direct ownership by 6% to 337,601 units (SEC Form 4)

Raun David exercised 13,953 shares at a strike of $2.15, increasing direct ownership by 3% to 425,597 units (SEC Form 4)

Ison James covered exercise/tax liability with 9,677 shares, gifted 15,656 shares and received a gift of 15,656 shares, decreasing direct ownership by 26% to 71,834 units (SEC Form 4)

Morrison John W Jr. covered exercise/tax liability with 12,504 shares, decreasing direct ownership by 5% to 245,358 units (SEC Form 4)

Dumont Michael J. bought $8 worth of shares (4 units at $2.05) (SEC Form 5)

Ison James covered exercise/tax liability with 3,766 shares, gifted 5,567 shares and received a gift of 5,567 shares, decreasing direct ownership by 9% to 97,167 units (SEC Form 4)

Morrison John W Jr. covered exercise/tax liability with 4,624 shares, decreasing direct ownership by 2% to 257,862 units (SEC Form 4)

Ison James exercised 7,222 shares at a strike of $1.08 (SEC Form 4)

Cooper Steve D sold $372,932 worth of One Stop Systems (206,040 units at $1.81) (SEC Form 4)

SEC Form 3 filed by new insider Herbets Mitchell H

Morrison John W Jr. covered exercise/tax liability with 1,232 shares, decreasing direct ownership by 0.47% to 262,486 units (SEC Form 4)

Ison James covered exercise/tax liability with 849 shares, gifted 1,651 shares and received a gift of 1,651 shares, decreasing direct ownership by 2% to 106,500 units (SEC Form 4)

Morrison John W Jr. covered exercise/tax liability with 2,463 shares, decreasing direct ownership by 0.93% to 263,718 units (SEC Form 4)

Ison James covered exercise/tax liability with 2,463 shares, gifted 4,204 shares and received a gift of 4,204 shares, decreasing direct ownership by 6% to 109,000 units (SEC Form 4)

New insider Manko Joseph M. Jr. claimed ownership of 1,099,899 shares (SEC Form 3)

New insider Dumont Michael J. claimed ownership of 65,845 shares (SEC Form 3)