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Magnite, Inc.

MGNI
Exchange
Nasdaq
Industry
Services-Computer Programming, Data Processing, Etc.
SEC CIK
0001595974

In the last 90 days, Magnite, Inc. insiders filed 0 open-market purchases and 24 sales; 311 institutions reported holding it in 13F filings for Q2 2026, worth $2.69B in total; no superinvestor holds it.

13F holders, Q1 2026

Institutional positions in Magnite, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
297
−2 vs. Q4 2025
Shares held
131.6M
+9.78M (+8.0%) vs. Q4 2025
Total value
$1.56B
−$413.1M (−20.9%) vs. Q4 2025
New holders
52
114 more added
Sold out
54
80 more reduced

5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q4 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting MGNI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2026: 297 institutions
Q1 2021: 280 institutionsQ2 2021: 268 institutionsQ3 2021: 279 institutionsQ4 2021: 248 institutionsQ1 2022: 231 institutionsQ2 2022: 231 institutionsQ3 2022: 218 institutionsQ4 2022: 231 institutionsQ1 2023: 224 institutionsQ2 2023: 224 institutionsQ3 2023: 215 institutionsQ4 2023: 217 institutionsQ1 2024: 232 institutionsQ2 2024: 269 institutionsQ3 2024: 280 institutionsQ4 2024: 286 institutionsQ1 2025: 293 institutionsQ2 2025: 287 institutionsQ3 2025: 316 institutionsQ4 2025: 304 institutionsQ1 2026: 297 institutionsQ2 2026: 311 institutions
Value heldQ1 2026: $1.56B
Q1 2021: $3.59BQ2 2021: $2.89BQ3 2021: $2.52BQ4 2021: $1.57BQ1 2022: $1.17BQ2 2022: $781.6MQ3 2022: $679.0MQ4 2022: $988.1MQ1 2023: $892.4MQ2 2023: $1.39BQ3 2023: $780.6MQ4 2023: $959.0MQ1 2024: $1.10BQ2 2024: $1.39BQ3 2024: $1.65BQ4 2024: $1.97BQ1 2025: $1.52BQ2 2025: $3.54BQ3 2025: $3.00BQ4 2025: $2.22BQ1 2026: $1.56BQ2 2026: $2.69B
Institutions holding MGNI and their total value by quarter
QuarterHoldersValue
Q2 2026311$2.69B
Q1 2026297$1.56B
Q4 2025304$2.22B
Q3 2025316$3.00B
Q2 2025287$3.54B
Q1 2025293$1.52B
Q4 2024286$1.97B
Q3 2024280$1.65B
Q2 2024269$1.39B
Q1 2024232$1.10B
Q4 2023217$959.0M
Q3 2023215$780.6M
Q2 2023224$1.39B
Q1 2023224$892.4M
Q4 2022231$988.1M
Q3 2022218$679.0M
Q2 2022231$781.6M
Q1 2022231$1.17B
Q4 2021248$1.57B
Q3 2021279$2.52B
Q2 2021268$2.89B
Q1 2021280$3.59B

Institutions, Q1 2026

Shares, value and share of portfolio for each institution holding Magnite, Inc.; share changes are against Q4 2025.

Institutions holding MGNI in Q1 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Avion Wealth49$00.00%00.0%Unchanged
DiNuzzo Private Wealth, Inc.1$120.00%−14−93.3%Reduced
Kilter Group LLC1$120.00%+1New
Hughes Financial Services, LLC3$360.00%−48−94.1%Reduced
Dunhill Financial, LLC4$490.00%00.0%Unchanged
Truvestments Capital LLC5$590.00%00.0%Unchanged
Wealth Preservation Advisors, LLC8$950.00%+8New
Ancora Advisors, LLC11$1310.00%00.0%Unchanged
Massmutual Trust Co FSB11$1310.00%+11New
DHJJ Financial Advisors, Ltd.13$1550.00%00.0%Unchanged
Rialto Wealth Management, LLC13$1550.00%+6+85.7%Added
Clearstead Advisors, LLC14$1670.00%−6,517−99.8%Reduced
Assetmark, Inc18$2140.00%00.0%Unchanged
Keating Financial Advisory Services, Inc.20$2380.00%+1+5.3%Added
JFS Wealth Advisors, LLC23$2740.00%+9+64.3%Added
Twin Peaks Wealth Advisors, LLC29$3450.00%+29New
True Wealth Design, LLC32$3810.00%−34−51.5%Reduced
GWM Advisors LLC35$4160.00%+35New
Steward Partners Investment Advisory, LLC40$4750.00%−7,420−99.5%Reduced
IFP Advisors, Inc49$5820.00%00.0%Unchanged
Glen Eagle Advisors, LLC49$5820.00%00.0%Unchanged
Duncker Streett & Co Inc52$6180.00%00.0%Unchanged
CVA Family Office, LLC70$8320.00%+70New
Federated Hermes, Inc.71$8430.00%−172,876−100.0%Reduced
Gill Capital Partners, LLC75$8910.00%+75New
SJS Investment Consulting Inc.83$9870.00%+75+937.5%Added
Covestor Ltd90$1.00K0.00%00.0%Unchanged
Bruce G. Allen Investments, LLC108$1.28K0.00%+12+12.5%Added
International Assets Investment Management, LLC110$1.30K0.00%00.0%Unchanged
Fortitude Family Office, LLC130$1.54K0.00%−394−75.2%Reduced
Anchor Investment Management, LLC150$1.78K0.00%00.0%Unchanged
McIlrath & Eck, LLC160$1.90K0.00%00.0%Unchanged
SRS Capital Advisors, Inc.172$2.04K0.00%+61+55.0%Added
Abound Wealth Management176$2.09K0.00%00.0%Unchanged
Root Financial Partners, LLC228$2.71K0.00%+146+178.0%Added
Farther Finance Advisors, LLC246$2.90K0.00%+94+61.8%Added
Rothschild Investment LLC282$3.35K0.00%+101+55.8%Added
Parallel Advisors, LLC284$3.37K0.00%00.0%Unchanged
Colonial Trust Co308$3.56K0.00%00.0%Unchanged
Bessemer Group Inc462$5.00K0.00%00.0%Unchanged
Rossby Financial, LCC500$5.89K0.00%00.0%Unchanged
CoreCap Advisors, LLC524$6.22K0.00%+143+37.5%Added
SBI Securities Co., Ltd.679$8.07K0.00%−166−19.6%Reduced
Essential Partners LLC696$8.27K0.00%+679+3,994.1%Added
Evelyn Partners Investment Management Services Ltd703$8.35K0.00%00.0%Unchanged
Cassaday & Co Wealth Management LLC715$8.49K0.00%+715New
Kemnay Advisory Services Inc.742$8.81K0.00%+742New
EverSource Wealth Advisors, LLC766$9.10K0.00%+382+99.5%Added
Umb Bank N A850$10.1K0.00%+1+0.1%Added
Larson Financial Group LLC880$10.5K0.00%−150−14.6%Reduced
Sterling Capital Management LLC922$11.0K0.00%+21+2.3%Added
Owl Creek Wealth Partners LLC945$11.2K0.00%+945New
Allworth Financial LP957$11.4K0.00%+513+115.5%Added
MAI Capital Management1,145$13.6K0.00%+63+5.8%Added
US Bancorp1,176$14.0K0.00%+42+3.7%Added
Signaturefd, LLC1,372$16.3K0.00%+201+17.2%Added
NBC Securities, Inc.1,440$17.1K0.00%−111−7.2%Reduced
Pinnacle Wealth Planning Services, Inc.1,476$17.5K0.00%00.0%Unchanged
MCF Advisors LLC1,500$17.8K0.00%00.0%Unchanged
EFG International AG1,500$17.8K0.00%00.0%Unchanged
Smartleaf Asset Management LLC1,749$20.2K0.00%−1,929−52.4%Reduced
Exchange Traded Concepts, LLC1,964$23.3K0.00%+1,964New
Huntington National Bank2,254$26.8K0.00%−14−0.6%Reduced
Strategic Wealth Partners, Ltd.2,492$29.6K0.00%00.0%Unchanged
Central Pacific Bank - Trust Division2,500$29.7K0.00%00.0%Unchanged
GAMMA Investing LLC2,554$30.3K0.00%+469+22.5%Added
BNP PARIBAS ASSET MANAGEMENT Holding S.A.2,677$31.8K0.00%+2,677New
Northwestern Mutual Wealth Management Co3,000$35.6K0.00%−201−6.3%Reduced
Cetera Trust Company, N.A3,110$36.9K0.02%00.0%Unchanged
Acadian Asset Management LLC3,686$43.0K0.00%+3,686New
The PNC Financial Services Group, Inc.3,783$44.9K0.00%+1,949+106.3%Added
Rachor Investment Advisory Services, LLC4,164$49.5K0.03%00.0%Unchanged
KBC Group NV4,480$53.0K0.00%00.0%Unchanged
Nisa Investment Advisors, LLC4,578$54.4K0.00%+2,709+144.9%Added
Rockefeller Capital Management L.P.4,782$56.8K0.00%−3,620−43.1%Reduced
Versant Capital Management, Inc5,529$65.7K0.01%+4,148+300.4%Added
Optiver Holding B.V.5,579$66.3K0.00%+5,383+2,746.4%Added
Blackhill Capital Inc5,991$71.2K0.00%00.0%Unchanged
Jones Financial Companies LLLP7,064$82.3K0.00%+1,573+28.6%Added
CWM, LLC7,016$83.3K0.00%+4,435+171.8%Added
Walleye Capital LLC7,633$90.7K0.00%−17,924−70.1%Reduced
Murphy & Mullick Capital Management Corp8,800$104.5K0.08%00.0%Unchanged
1620 Investment Advisors, Inc.9,553$113.5K0.08%+600+6.7%Added
Advisor Group Holdings, Inc.9,713$115.4K0.00%−6,816−41.2%Reduced
Tower Research Capital LLC (TRC)9,760$115.9K0.00%+2,688+38.0%Added
JustInvest LLC10,311$122.5K0.00%+10,311New
Ritholtz Wealth Management10,334$122.8K0.00%+10,334New
Parkside Financial Bank & Trust10,813$128.5K0.01%+1,401+14.9%Added
Cornerstone Wealth Management, LLC10,920$129.7K0.01%00.0%Unchanged
Simplex Trading, LLC11,316$134.4K0.00%−252,046−95.7%Reduced
M&T Bank Corp11,621$137.8K0.00%−5,620−32.6%Reduced
Money Concepts Capital Corp11,659$138.5K0.01%+11,659New
Dark Forest Capital Management LP11,687$138.8K0.01%+11,687New
Ameritas Investment Partners, Inc.11,700$139.0K0.00%00.0%Unchanged
Sciencast Management LP11,704$139.0K0.02%+11,704New
Two Sigma Securities, LLC12,031$142.9K0.02%+12,031New
Truist Financial Corp12,076$143.5K0.00%−9,208−43.3%Reduced
Ledgewood Wealth Advisors, LLC12,577$149.4K0.08%−1,520−10.8%Reduced
OP Asset Management Ltd12,621$149.9K0.00%00.0%Unchanged
Gotham Asset Management, LLC12,885$153.1K0.00%+12,885New