BARRETT MICHAEL G.

PrivateCIK: 1100612
Location

PLAYA VISTA, CA

BARRETT MICHAEL G. (President and CEO) sold 40.9% of their position (278.60K shares) of MAGNITE, INC. on the open market

Open‑market sale worth $4.71M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 2 sales
InsiderBARRETT MICHAEL G.CIK 1100612
IssuerMAGNITE, INC.CIK 1595974
DirectorOfficer· President and CEO
Since Aug 2018
-278.60K
Net shares
Net seller
$4.71M
Total sold
2
Open market trades
0B · 2S
6
Total transactions
278.60K acquired · 557.19K disposed
Non-Derivative Transactions4

Common Stock

Direct
M · Option Exercise

Shares

+178.60K

Price / share

$5.80

Trade value

$1.04M

% of position

44.3%
6/15/2026
403.07K581.67K

Common Stock

Direct
S · Sale

Shares

178.60K

Price / share

$16.59

Trade value

$2.96M

% of position

30.7%
6/15/2026
581.67K403.07K

Common Stock

Direct
M · Option Exercise

Shares

+100K

Price / share

$5.80

Trade value

$580K

% of position

24.8%
6/16/2026
403.07K503.07K

Common Stock

Direct
S · Sale

Shares

100K

Price / share

$17.50

Trade value

$1.75M

% of position

19.9%
6/16/2026
503.07K403.07K
Total

Net shares

+0.00

Net value

-$3.10M

Derivative Transactions2

Employee Stock Option (Right to Buy)

Direct
M · Option Exercise
Converts to

Common Stock

178.60K shares

Shares

178.60K

Strike price

5.80

Held after

507.56K

Exercisable

6/15/2026

Employee Stock Option (Right to Buy)

Direct
M · Option Exercise
Converts to

Common Stock

100K shares

Shares

100K

Strike price

5.80

Held after

407.56K

Exercisable

6/16/2026
BARRETT MICHAEL G. — Insider Transaction (Form 4) Filed Jun 17, 2026 | Finecho