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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, Q4 2025

Institutional positions in Magnite, Inc. as of Dec 31, 2025. 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
304
+1 vs. Q3 2025
Shares held
136.7M
−1.02M (−0.7%) vs. Q3 2025
Total value
$2.22B
−$779.0M (−26.0%) vs. Q3 2025
New holders
56
122 more added
Sold out
55
93 more reduced

13 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 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 holdersQ4 2025: 304 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 heldQ4 2025: $2.22B
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, Q4 2025

Shares, value and share of portfolio for each institution holding Magnite, Inc.; share changes are against Q3 2025.

Institutions holding MGNI in Q4 2025
InstitutionSharesValue% of portfolioChange in sharesAction
OP Asset Management Ltd12,621$204.8K0.00%+4,391+53.4%Added
Bayesian Capital Management, LP11,987$194.5K0.45%+11,987New
Ameritas Investment Partners, Inc.11,700$189.9K0.01%00.0%Unchanged
Concurrent Investment Advisors, LLC11,270$182.9K0.00%+11,270New
Xponance, Inc.11,096$180.1K0.00%+112+1.0%Added
Cornerstone Wealth Management, LLC10,920$177.2K0.01%00.0%Unchanged
Harbour Capital Advisors, LLC11,000$176.7K0.04%+11,000New
Versor Investments LP10,800$175.3K0.03%+10,800New
Parkside Financial Bank & Trust9,412$152.8K0.01%−52−0.5%Reduced
1620 Investment Advisors, Inc.8,953$145.3K0.10%+150+1.7%Added
Murphy & Mullick Capital Management Corp8,800$142.8K0.10%00.0%Unchanged
Rockefeller Capital Management L.P.8,402$136.4K0.00%+7,136+563.7%Added
Steward Partners Investment Advisory, LLC7,460$121.1K0.00%+7,420+18,550.0%Added
Tower Research Capital LLC (TRC)7,072$114.8K0.00%−3,682−34.2%Reduced
Clearstead Advisors, LLC6,531$106.0K0.00%+4,304+193.3%Added
Bayforest Capital Ltd6,415$104.1K0.08%+214+3.5%Added
Blackhill Capital Inc5,991$97.2K0.01%−5,631−48.5%Reduced
Jones Financial Companies LLLP5,491$89.1K0.00%−612−10.0%Reduced
Group One Trading, L.P.5,347$86.8K0.00%−104,968−95.2%Reduced
FNY Investment Advisers, LLC4,775$77.0K0.02%+4,761+34,007.1%Added
State of Wyoming4,600$74.7K0.01%+2,826+159.3%Added
KBC Group NV4,480$73.0K0.00%00.0%Unchanged
Amalgamated Bank4,400$71.0K0.00%+64+1.5%Added
Rachor Investment Advisory Services, LLC4,164$67.6K0.04%+4,164New
Smartleaf Asset Management LLC3,678$60.5K0.00%+1,824+98.4%Added
AdvisorNet Financial, Inc3,500$56.8K0.00%+3,500New
Smithfield Trust Co3,240$52.0K0.00%−900−21.7%Reduced
Northwestern Mutual Wealth Management Co3,201$52.0K0.00%+201+6.7%Added
Cetera Trust Company, N.A3,110$50.5K0.03%−6,750−68.5%Reduced
CWM, LLC2,581$42.0K0.00%+512+24.7%Added
Central Pacific Bank - Trust Division2,500$40.6K0.00%+2,500New
Strategic Wealth Partners, Ltd.2,492$40.4K0.00%+70+2.9%Added
Huntington National Bank2,268$36.8K0.00%+79+3.6%Added
GAMMA Investing LLC2,085$33.8K0.00%+275+15.2%Added
Strategic Advocates LLC1,920$31.6K0.01%−2−0.1%Reduced
Nisa Investment Advisors, LLC1,869$30.3K0.00%−911−32.8%Reduced
The PNC Financial Services Group, Inc.1,834$29.8K0.00%−594−24.5%Reduced
NBC Securities, Inc.1,551$25.2K0.00%+232+17.6%Added
MCF Advisors LLC1,500$24.3K0.00%00.0%Unchanged
EFG International AG1,500$24.3K0.00%+1,500New
Pinnacle Wealth Planning Services, Inc.1,476$24.0K0.00%+1,476New
Versant Capital Management, Inc1,381$22.4K0.00%+296+27.3%Added
Signaturefd, LLC1,171$19.0K0.00%00.0%Unchanged
US Bancorp1,134$18.4K0.00%−462−28.9%Reduced
MAI Capital Management1,082$17.6K0.00%−262−19.5%Reduced
Larson Financial Group LLC1,030$16.7K0.00%+100+10.8%Added
Sterling Capital Management LLC901$14.6K0.00%+562+165.8%Added
Umb Bank N A849$13.8K0.00%+4+0.5%Added
SBI Securities Co., Ltd.845$13.7K0.00%+17+2.1%Added
Evelyn Partners Investment Management Services Ltd703$11.4K0.00%00.0%Unchanged
Torren Management, LLC541$8.78K0.00%+541New
Fortitude Family Office, LLC524$8.51K0.00%−51−8.9%Reduced
Rossby Financial, LCC500$8.12K0.00%00.0%Unchanged
Bessemer Group Inc462$8.00K0.00%00.0%Unchanged
Allworth Financial LP444$7.21K0.00%−121−21.4%Reduced
Raleigh Capital Management Inc.385$6.25K0.00%−47−10.9%Reduced
EverSource Wealth Advisors, LLC384$6.23K0.00%−17−4.2%Reduced
CoreCap Advisors, LLC381$6.18K0.00%+71+22.9%Added
Colonial Trust Co308$5.07K0.00%+123+66.5%Added
Lloyd Advisory Services, LLC.301$4.88K0.00%+301New
Parallel Advisors, LLC284$4.61K0.00%−82−22.4%Reduced
MTM Investment Management, LLC275$4.46K0.00%−1,371−83.3%Reduced
Optiver Holding B.V.196$3.18K0.00%−228−53.8%Reduced
Rothschild Investment LLC181$2.94K0.00%−39−17.7%Reduced
Abound Wealth Management176$2.86K0.00%00.0%Unchanged
Flagship Harbor Advisors, LLC175$2.84K0.00%+175New
McIlrath & Eck, LLC160$2.60K0.00%00.0%Unchanged
Farther Finance Advisors, LLC152$2.47K0.00%−6,330−97.7%Reduced
Anchor Investment Management, LLC150$2.44K0.00%00.0%Unchanged
Richard W. Paul & Associates, LLC147$2.39K0.00%00.0%Unchanged
CIBC Private Wealth Group, LLC131$2.13K0.00%+80+156.9%Added
SRS Capital Advisors, Inc.111$1.80K0.00%−28−20.1%Reduced
International Assets Investment Management, LLC110$1.78K0.00%+110New
Bay Harbor Wealth Management, LLC108$1.75K0.00%−13−10.7%Reduced
Bruce G. Allen Investments, LLC96$1.56K0.00%−2−2.0%Reduced
Root Financial Partners, LLC82$1.33K0.00%+23+39.0%Added
Global Retirement Partners, LLC80$1.30K0.00%−3,200−97.6%Reduced
True Wealth Design, LLC66$1.07K0.00%+66New
ORG Partners LLC65$1.05K0.00%00.0%Unchanged
Covestor Ltd90$1.00K0.00%00.0%Unchanged
Duncker Streett & Co Inc52$8440.00%00.0%Unchanged
Hughes Financial Services, LLC51$8280.00%00.0%Unchanged
Glen Eagle Advisors, LLC49$7950.00%00.0%Unchanged
IFP Advisors, Inc49$7950.00%+43+716.7%Added
Westside Investment Management, Inc.45$7300.00%+45New
Basecamp Wealth Advisors LLC41$6650.00%+41New
Bare Financial Services, Inc34$5520.00%+34New
Quadrant Capital Group LLC33$5360.00%+33New
Bell Investment Advisors, Inc30$4870.00%+30New
UMA Financial Services, Inc.20$3250.00%+20New
Keating Financial Advisory Services, Inc.19$3080.00%+19New
Assetmark, Inc18$2920.00%−367−95.3%Reduced
Essential Partners LLC17$2760.00%−9−34.6%Reduced
DiNuzzo Private Wealth, Inc.15$2440.00%+15New
Atlantic Private Wealth, LLC15$2430.00%+15New
JFS Wealth Advisors, LLC14$2280.00%−4−22.2%Reduced
DHJJ Financial Advisors, Ltd.13$2110.00%00.0%Unchanged
Ancora Advisors, LLC11$1790.00%00.0%Unchanged
SJS Investment Consulting Inc.8$1300.00%+6+300.0%Added
Rialto Wealth Management, LLC7$1140.00%+4+133.3%Added