MGNI insider transactions

SEC Form 4 filed by Magnite Inc.

CHIEF ACCOUNTING OFFICER Sullivan Haas was granted 24,641 shares, increasing direct ownership by 34% to 97,554 units (SEC Form 4)

CHIEF FINANCIAL OFFICER Gephart Brian was granted 64,682 shares, increasing direct ownership by 63% to 167,010 units (SEC Form 4)

New insider Sullivan Haas claimed ownership of 72,913 shares (SEC Form 3)

Director Caine Paul sold $198,750 worth of shares (7,500 units at $26.50) as part of a pre-agreed trading plan, decreasing direct ownership by 5% to 137,401 units (SEC Form 4)

Director Knopper Douglas S sold $981,216 worth of shares (37,337 units at $26.28) as part of a pre-agreed trading plan, decreasing direct ownership by 42% to 51,136 units (SEC Form 4)

CHIEF TECHNOLOGY OFFICER Buonasera David sold $27,960 worth of shares (1,165 units at $24.00) as part of a pre-agreed trading plan, decreasing direct ownership by 0.47% to 245,155 units (SEC Form 4)

Director Spillane Robert F exercised 10,363 shares at a strike of $5.17 and sold $246,225 worth of shares (10,363 units at $23.76) (SEC Form 4)

Officer Evans Katie Seitz sold $335,928 worth of shares (13,997 units at $24.00) as part of a pre-agreed trading plan, decreasing direct ownership by 3% to 441,800 units (SEC Form 4)

CHIEF LEGAL OFFICER Saltz Aaron sold $936,400 worth of shares (40,000 units at $23.41) as part of a pre-agreed trading plan, decreasing direct ownership by 15% to 224,389 units (SEC Form 4)

Director Caine Paul sold $117,650 worth of shares (5,000 units at $23.53) as part of a pre-agreed trading plan, decreasing direct ownership by 3% to 144,901 units (SEC Form 4)

Officer Evans Katie Seitz sold $1,023,301 worth of shares (43,385 units at $23.59) as part of a pre-agreed trading plan and exercised 13,546 shares at a strike of $5.16, decreasing direct ownership by 6% to 455,797 units (SEC Form 4)

CHIEF TECHNOLOGY OFFICER Buonasera David sold $151,864 worth of shares (6,414 units at $23.68) as part of a pre-agreed trading plan, decreasing direct ownership by 3% to 246,320 units (SEC Form 4)

Director Harden Sarah Patricia sold $1,154,584 worth of shares (48,986 units at $23.57) as part of a pre-agreed trading plan, decreasing direct ownership by 30% to 114,751 units (SEC Form 4)

CHIEF TECHNOLOGY OFFICER Buonasera David covered exercise/tax liability with 8,102 shares, decreasing direct ownership by 3% to 252,734 units (SEC Form 4) to satisfy withholding obligation

Officer Evans Katie Seitz covered exercise/tax liability with 11,204 shares, decreasing direct ownership by 2% to 485,636 units (SEC Form 4) (for tax liability)

CHIEF LEGAL OFFICER Saltz Aaron covered exercise/tax liability with 5,627 shares, decreasing direct ownership by 2% to 264,389 units (SEC Form 4) (for tax liability)

CHIEF ACCOUNTING OFFICER Gephart Brian covered exercise/tax liability with 3,789 shares, decreasing direct ownership by 4% to 102,328 units (SEC Form 4) (for tax liability)

CEO Barrett Michael G. covered exercise/tax liability with 10,404 shares, decreasing direct ownership by 3% to 392,670 units (SEC Form 4) (withholding obligation)

CHIEF FINANCIAL OFFICER Day David covered exercise/tax liability with 14,170 shares, decreasing direct ownership by 3% to 452,861 units (SEC Form 4) to satisfy withholding tax

Director Caine Paul sold $187,500 worth of shares (7,500 units at $25.00) as part of a pre-agreed trading plan, decreasing direct ownership by 5% to 149,901 units (SEC Form 4)

Officer Buckley Sean Patrick covered exercise/tax liability with 11,715 shares and sold $270,043 worth of shares (11,030 units at $24.48) as part of a pre-agreed trading plan, decreasing direct ownership by 7% to 293,060 units (SEC Form 4) to satisfy tax liability

CHIEF FINANCIAL OFFICER Day David gifted 26,258 shares, decreasing direct ownership by 5% to 467,031 units (SEC Form 4)

CHIEF ACCOUNTING OFFICER Gephart Brian sold $307,982 worth of shares (12,479 units at $24.68), decreasing direct ownership by 11% to 106,117 units (SEC Form 4)

Director Lam Rachel sold $241,600 worth of shares (10,000 units at $24.16), decreasing direct ownership by 4% to 230,620 units (SEC Form 4)

Director Caine Paul sold $121,750 worth of shares (5,000 units at $24.35) as part of a pre-agreed trading plan, decreasing direct ownership by 3% to 157,401 units (SEC Form 4)

Officer Buckley Sean Patrick exercised 28,703 shares at a strike of $13.90 and sold $1,645,316 worth of shares (67,179 units at $24.49) as part of a pre-agreed trading plan, decreasing direct ownership by 11% to 315,805 units (SEC Form 4)

Director Knopper Douglas S sold $848,297 worth of shares (37,337 units at $22.72) as part of a pre-agreed trading plan, decreasing direct ownership by 30% to 88,473 units (SEC Form 4)

CHIEF TECHNOLOGY OFFICER Buonasera David sold $179,478 worth of shares (7,649 units at $23.46) as part of a pre-agreed trading plan, decreasing direct ownership by 3% to 260,836 units (SEC Form 4)

Officer Evans Katie Seitz exercised 20,000 shares at a strike of $5.16 and sold $480,000 worth of shares (20,000 units at $24.00) as part of a pre-agreed trading plan (SEC Form 4)

CEO Barrett Michael G. exercised 293,968 shares at a strike of $5.80 and sold $6,678,953 worth of shares (293,968 units at $22.72) as part of a pre-agreed trading plan (SEC Form 4)

CEO Barrett Michael G. exercised 38,596 shares at a strike of $5.80 and sold $785,429 worth of shares (38,596 units at $20.35) as part of a pre-agreed trading plan (SEC Form 4)

Director Caine Paul sold $103,200 worth of shares (5,000 units at $20.64) as part of a pre-agreed trading plan, decreasing direct ownership by 3% to 162,401 units (SEC Form 4)

CHIEF TECHNOLOGY OFFICER Buonasera David sold $25,704 worth of shares (1,224 units at $21.00) as part of a pre-agreed trading plan, decreasing direct ownership by 0.45% to 268,485 units (SEC Form 4)

Officer Buckley Sean Patrick sold $404,470 worth of shares (19,233 units at $21.03) as part of a pre-agreed trading plan, decreasing direct ownership by 5% to 354,281 units (SEC Form 4)

CHIEF TECHNOLOGY OFFICER Buonasera David sold $187,520 worth of shares (9,376 units at $20.00) as part of a pre-agreed trading plan, decreasing direct ownership by 3% to 269,709 units (SEC Form 4)

CEO Barrett Michael G. sold $1,462,500 worth of shares (75,000 units at $19.50) as part of a pre-agreed trading plan and exercised 75,000 shares at a strike of $5.80 (SEC Form 4)

Officer Buckley Sean Patrick sold $365,427 worth of shares (19,233 units at $19.00) as part of a pre-agreed trading plan, decreasing direct ownership by 5% to 373,514 units (SEC Form 4)

Director Knopper Douglas S sold $675,800 worth of shares (37,337 units at $18.10) as part of a pre-agreed trading plan, decreasing direct ownership by 23% to 125,810 units (SEC Form 4)

CHIEF TECHNOLOGY OFFICER Buonasera David sold $246,934 worth of shares (13,699 units at $18.03) as part of a pre-agreed trading plan, decreasing direct ownership by 5% to 279,085 units (SEC Form 4)

CEO Barrett Michael G. exercised 278,596 shares at a strike of $5.80 and sold $4,712,908 worth of shares (278,596 units at $16.92) as part of a pre-agreed trading plan (SEC Form 4)

Director Caine Paul was granted 13,798 shares, increasing direct ownership by 9% to 167,401 units (SEC Form 4)

Director Yu Diane was granted 13,798 shares, increasing direct ownership by 20% to 81,279 units (SEC Form 4)

Director Spillane Robert F was granted 13,798 shares, increasing direct ownership by 31% to 57,715 units (SEC Form 4)

Director Harden Sarah Patricia was granted 13,798 shares, increasing direct ownership by 9% to 163,737 units (SEC Form 4)

Director Knopper Douglas S was granted 13,798 shares and sold $169,349 worth of shares (10,766 units at $15.73) as part of a pre-agreed trading plan, increasing direct ownership by 2% to 163,147 units (SEC Form 4)

Director Rossman James was granted 13,798 shares, increasing direct ownership by 15% to 107,477 units (SEC Form 4)

Director Lam Rachel was granted 13,798 shares, increasing direct ownership by 6% to 240,620 units (SEC Form 4)

Director Pearson David T. was granted 13,798 shares and sold $168,488 worth of shares (10,766 units at $15.65) as part of a pre-agreed trading plan, increasing direct ownership by 4% to 79,001 units (SEC Form 4)

CHIEF TECHNOLOGY OFFICER Buonasera David sold $21,135 worth of shares (1,409 units at $15.00) as part of a pre-agreed trading plan, decreasing direct ownership by 0.48% to 292,784 units (SEC Form 4)

Director Spillane Robert F sold $133,300 worth of shares (10,000 units at $13.33), decreasing direct ownership by 19% to 43,917 units (SEC Form 4)

CHIEF ACCOUNTING OFFICER Gephart Brian covered exercise/tax liability with 3,789 shares, decreasing direct ownership by 3% to 118,596 units (SEC Form 4) (tax liability)

CHIEF TECHNOLOGY OFFICER Buonasera David covered exercise/tax liability with 8,335 shares, decreasing direct ownership by 3% to 294,193 units (SEC Form 4) (tax withholding)

President, Operations Evans Katie Seitz covered exercise/tax liability with 11,204 shares, decreasing direct ownership by 2% to 496,840 units (SEC Form 4) to satisfy withholding obligation

CHIEF FINANCIAL OFFICER Day David covered exercise/tax liability with 14,170 shares, decreasing direct ownership by 3% to 493,289 units (SEC Form 4) (tax liability)

CHIEF LEGAL OFFICER Saltz Aaron covered exercise/tax liability with 5,627 shares, decreasing direct ownership by 2% to 270,016 units (SEC Form 4) (withholding tax)

President, Revenue Buckley Sean Patrick covered exercise/tax liability with 12,019 shares, decreasing direct ownership by 3% to 392,747 units (SEC Form 4) to satisfy withholding obligation

CEO Barrett Michael G. covered exercise/tax liability with 10,404 shares, decreasing direct ownership by 3% to 403,074 units (SEC Form 4) to cover withholding tax

CHIEF PRODUCT OFFICER Soroca Adam Lee covered exercise/tax liability with 18,933 shares and sold $258,348 worth of shares (21,529 units at $12.00), decreasing direct ownership by 9% to 388,425 units (SEC Form 4)

CEO Barrett Michael G. covered exercise/tax liability with 23,549 shares, decreasing direct ownership by 5% to 412,162 units (SEC Form 4)