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Magnite, Inc. planned insider sales

In the last twelve months insiders at Magnite, Inc. filed 59 Form 144 notices of planned sales, 1.5 million shares worth $29.4 million at the time of filing, from 15 sellers. The latest, filed 17 September 2026: Paul Caine (director), 20,000 shares worth $475,600, planned for around 17 September 2026 through Morgan Stanley Smith Barney LLC Executive Financial Services.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
17 September 2026Paul CaineDirector20,000$475,60017 September 202620,000 shares from 17 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
17 September 2026Douglas S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13Director37,337$887,87417 September 202637,337 shares from 17 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
14 September 2026David BuonaseraOfficer1,165$27,69214 September 20261,165 shares from 14 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
14 September 2026Robert SpillaneDirector10,363$246,24114 September 202610,363 shares from 14 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
11 September 2026Katheryn EvansOfficer13,997$335,92811 September 202613,997 shares from 11 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
10 September 2026Paul CaineDirector10,000$235,80010 September 20265,000 shares from 10 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
10 September 2026Aaron SaltzOfficer60,000$1.4 million10 September 202640,000 shares from 10 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPreviously Exercised Stock Options; Restricted Stock UnitsForm 144
9 September 2026Katheryn EvansOfficer11,100$260,3579 September 202643,385 shares from 8 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
8 September 2026Katheryn EvansOfficer32,285$762,8718 September 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock; Stock Option ExerciseForm 144
2 September 2026David BuonaseraOfficer1,043$26,0752 September 20266,414 shares from 1 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
1 September 2026David BuonaseraOfficer5,371$125,7891 September 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
28 August 2026Sarah Patricia HardenDirector18,436$442,46428 August 202618,436 shares from 28 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
26 August 2026Sarah Patricia HardenDirector30,550$712,16726 August 202630,550 shares from 26 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
18 August 2026Sean BuckleyOfficer2,759$66,74018 August 202611,030 shares from 17 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
17 August 2026Sean BuckleyOfficer8,271$204,54217 August 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
14 August 2026Paul CaineDirector2,500$61,45014 August 20267,500 shares from 14 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
10 August 2026Rachel LamDirector10,000$241,57210 August 202610,000 shares from 10 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
10 August 2026Brian GephartOfficer12,479$308,02410 August 202612,479 shares from 10 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
6 August 2026David BuonaseraOfficer7,649$179,4606 August 20267,649 shares from 6 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
6 August 2026Douglas S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13Director18,209$376,3806 August 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
6 August 2026Douglas KnopperDirector19,128$395,3766 August 202637,337 shares from 6 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
6 August 2026Katheryn EvansOfficer20,000$480,0006 August 202620,000 shares from 6 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
6 August 2026Sean BuckleyOfficer67,179$1.4 million6 August 202667,179 shares from 6 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock Options; RSU & PSAForm 144
6 August 2026Michael G BarrettOfficer, Director293,968$6.7 million6 August 2026293,968 shares from 6 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
15 July 2026Michael G BarrettOfficer, Director38,596$785,51015 July 202638,596 shares from 15 July 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
10 July 2026Paul CaineDirector15,000$318,30010 July 202610,000 shares from 10 July 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
7 July 2026David BuonaseraOfficer1,224$25,7047 July 20261,224 shares from 7 July 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
7 July 2026Adam L SorocaFormer Officer8,000$168,0007 July 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
7 July 2026Sean BuckleyOfficer19,233$400,8167 July 202619,233 shares from 7 July 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock Awards; Restricted Stock UnitsForm 144
1 July 2026Adam L SorocaFormer Officer8,000$160,0001 July 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
1 July 2026David BuonaseraOfficer9,376$187,5201 July 20269,376 shares from 1 July 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
29 June 2026Michael G BarrettOfficer, Director75,000$1.5 million29 June 202675,000 shares from 29 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
17 June 2026David BuonaseraOfficer1,409$26,77117 June 202612,642 shares from 16 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
17 June 2026Adam L SorocaFormer Officer8,000$152,00017 June 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
17 June 2026Sean BuckleyOfficer19,233$356,77217 June 202619,233 shares from 17 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
16 June 2026Adam L SorocaFormer Officer6,000$108,00016 June 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
16 June 2026David BuonaseraOfficer11,233$202,19416 June 20261,057 shares from 15 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
16 June 2026Douglas KnopperDirector37,337$625,39516 June 202637,337 shares from 16 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
16 June 2026Michael G BarrettOfficer, Director100,000$1.8 million16 June 2026278,596 shares from 15 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
15 June 2026David BuonaseraOfficer1,057$17,96915 June 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
15 June 2026Adam L SorocaFormer Officer6,000$102,00015 June 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
15 June 2026Michael G BarrettOfficer, Director178,596$3.0 million15 June 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
11 June 2026Adam L SorocaFormer Officer6,500$104,19511 June 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
10 June 2026David T PearsonDirector10,766$168,50010 June 202610,766 shares from 10 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
10 June 2026Douglas KnopperDirector10,766$170,21010 June 202610,766 shares from 10 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
9 June 2026Adam L SorocaFormer Officer6,900$105,2259 June 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
3 June 2026Adam L SorocaFormer Officer7,100$100,9753 June 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
1 June 2026David BuonaseraOfficer1,409$21,1351 June 20261,409 shares from 1 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
1 June 2026Adam L SorocaFormer Officer27,606$418,0151 June 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
28 May 2026Adam L SorocaFormer Officer42,756$603,08528 May 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
27 May 2026Adam L SorocaFormer Officer18,225$250,47727 May 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
19 May 2026Robert SpillaneDirector10,000$133,33119 May 202610,000 shares from 19 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
18 May 2026Adam L SorocaFormer Officer18,451$247,97618 May 2026No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
18 February 2026Adam L SorocaOfficer21,529$258,34818 February 202621,529 shares from 18 February 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
17 December 2025Adam L SorocaOfficer16,656$283,15217 December 202516,656 shares from 17 December 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesStock Option ExerciseForm 144
24 November 2025Sean P BuckleyOfficer2,213$32,08824 November 20252,213 shares from 24 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
21 November 2025Robert SpillaneDirector12,500$177,79521 November 202512,500 shares from 21 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
18 November 2025Sean P BuckleyOfficer4,426$59,14218 November 20254,426 shares from 18 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
18 November 2025Adam L SorocaOfficer10,857$143,68518 November 202510,857 shares from 18 November 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted StockForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Sold, per Form 4: the same seller's open-market sales on Form 4 from the notice's date to 90 days after, added up, as they appear on the insiders page; a holder who files no Form 4, such as some large holders, never shows one. What is a Form 144?