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Disclosery

MGNI MAGNITE INC

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Stock (common), issuer CIK 1595974

288 managers (297 13F filers) reported a position in MGNI shares at 2026-03-31, 131,564,561 shares in all. 45 filers opened a position and 54 filers sold out during the quarter.

Managers
288
13F filers
297
New
45
Added
114
Reduced
80
Sold out
54
Shares held by filers
131,564,561

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

The latest Form 4 transactions, non-derivative.
OwnerDateSharesPriceFiling
Caine Pauldirector2026-10-12-12,500 S$25.29Form 4

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
SIMPLEX TRADING, LLC11,316$134K<0.01%-252,04613F-HRTimeline
Cornerstone Wealth Management, LLC10,920$130K0.01%013F-HRTimeline
Parkside Financial Bank & Trust10,813$128K0.01%+1,40113F-HRTimeline
RITHOLTZ WEALTH MANAGEMENT10,334$123K<0.01%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…9,760$116K<0.01%+2,68813F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.9,713$115K<0.01%-6,81613F-HRTimelineGroup
1620 INVESTMENT ADVISORS, INC.9,553$113K0.08%+60013F-HRTimeline
Murphy & Mullick Capital Management Corp8,800$105K0.08%013F-HRTimeline
CWM, LLCin group CWM, LLC7,016$83.3K<0.01%+4,43513F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP7,064$82.3K<0.01%+1,57313F-HRTimelineGroup
BLACKHILL CAPITAL INC5,991$71.2K<0.01%013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.5,579$66.3K<0.01%+5,38313F-HR/ATimelineGroup
Versant Capital Management, Inc5,529$65.7K0.01%+4,14813F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…4,782$56.8K<0.01%-3,62013F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC4,578$54.4K<0.01%+2,70913F-HRTimeline
KBC Group NVin group KBC Group NV4,480$53K<0.01%013F-HRTimelineGroup
Rachor Investment Advisory Services, LLC4,164$49.5K0.03%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…3,783$44.9K<0.01%+1,94913F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC3,686$43K<0.01%new13F-HRTimelineGroup
Cetera Trust Company, N.A3,110$36.9K0.02%013F-HRTimeline
NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN…3,000$35.6K<0.01%-20113F-HRTimelineGroup
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …2,677$31.8K<0.01%new13F-HRTimelineGroup
GAMMA Investing LLC2,554$30.3K<0.01%+46913F-HRTimeline
Central Pacific Bank - Trust Division2,500$29.7K<0.01%013F-HRTimeline
Strategic Wealth Partners, Ltd.2,492$29.6K<0.01%013F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK2,254$26.8K<0.01%-1413F-HRTimelineGroup
EXCHANGE TRADED CONCEPTS, LLC1,964$23.3K<0.01%new13F-HRTimeline
Smartleaf Asset Management LLC1,749$20.2K<0.01%-1,92913F-HRTimeline
MCF Advisors LLC1,500$17.8K<0.01%013F-HRTimeline
EFG International AGin group EFG International AG1,500$17.8K<0.01%013F-HRTimelineGroup
Pinnacle Wealth Planning Services, Inc.1,476$17.5K<0.01%013F-HRTimeline
LANARK FINANCIAL, INC.1,440$17.1K<0.01%-11113F-HRTimeline
SIGNATUREFD, LLC1,372$16.3K<0.01%+20113F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\1,176$14K<0.01%+4213F-HRTimelineGroup
MAI Capital Management1,145$13.6K<0.01%+6313F-HRTimeline
Allworth Financial LP957$11.4K<0.01%+51313F-HRTimeline
Owl Creek Wealth Partners LLC945$11.2K<0.01%13F-HRTimeline
Sterling Capital Management LLC922$11K<0.01%+2113F-HRTimeline
Larson Financial Group LLC880$10.5K<0.01%-15013F-HRTimeline
UMB Bank, n.a.850$10.1K<0.01%+113F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…766$9.1K<0.01%+38213F-HR/ATimelineGroup
Kemnay Advisory Services Inc.742$8.81K<0.01%new13F-HRTimeline
Cassaday & Co Wealth Management LLC715$8.49K<0.01%new13F-HRTimeline
Evelyn Partners Investment Management S…in group Evelyn Partners Group Ltd703$8.35K<0.01%013F-HRTimelineGroup
Essential Partners LLC696$8.27K<0.01%+67913F-HRTimeline
SBI Securities Co., Ltd.679$8.07K<0.01%-16613F-HRTimeline
CoreCap Advisors, LLC524$6.22K<0.01%+14313F-HRTimeline
Rossby Financial, LCC500$5.89K<0.01%013F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC462$5K<0.01%013F-HRTimelineGroup
Colonial Trust Co / SCin group Colonial Trust Advisors308$3.56K<0.01%013F-HRTimelineGroup
Parallel Advisors, LLC284$3.37K<0.01%013F-HR/ATimeline
ROTHSCHILD INVESTMENT LLC282$3.35K<0.01%+10113F-HRTimeline
Farther Finance Advisors, LLC246$2.9K<0.01%+9413F-HRTimeline
Root Financial Partners, LLC228$2.71K<0.01%+14613F-HRTimeline
Abound Wealth Management176$2.09K<0.01%013F-HRTimeline
Arax Advisory Partners172$2.04K<0.01%+6113F-HRTimeline
McIlrath & Eck, LLC160$1.9K<0.01%013F-HRTimeline
Anchor Investment Management, LLC150$1.78K<0.01%013F-HRTimeline
Fortitude Family Office, LLC130$1.54K<0.01%-39413F-HRTimeline
INTERNATIONAL ASSETS INVESTMENT MANAGEM…110$1.3K<0.01%013F-HRTimeline
Bruce G. Allen Investments, LLC108$1.28K<0.01%+1213F-HRTimeline
Covestor Ltd90$1K<0.01%013F-HRTimeline
SJS Investment Consulting Inc.83$987<0.01%+7513F-HRTimeline
GILL CAPITAL PARTNERS, LLC75$891<0.01%new13F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.71$843<0.01%-172,87613F-HRTimelineGroup
CVA Family Office, LLC70$832<0.01%new13F-HRTimeline
DUNCKER STREETT & CO INC52$618<0.01%013F-HRTimeline
IFP Advisors, Inc49$582<0.01%013F-HRTimeline
Glen Eagle Advisors, LLC49$582<0.01%013F-HRTimeline
Steward Partners Investment Advisory, L…40$475<0.01%-7,42013F-HRTimeline
NewEdge Advisors, LLC35$416<0.01%new13F-HR/ATimeline
True Wealth Design, LLC32$381<0.01%-3413F-HRTimeline
TWIN PEAKS WEALTH ADVISORS, LLC29$345<0.01%new13F-HRTimeline
JFS WEALTH ADVISORS, LLC23$274<0.01%+913F-HRTimeline
Keating Financial Advisory Services, In…20$238<0.01%+113F-HRTimeline
ASSETMARK, INCin group ASSETMARK, INC18$214<0.01%013F-HRTimelineGroup
Clearstead Advisors, LLC14$167<0.01%-6,51713F-HRTimeline
DHJJ Financial Advisors, Ltd.13$155<0.01%013F-HRTimeline
Rialto Wealth Management, LLC13$155<0.01%+613F-HRTimeline
MassMutual Private Wealth & Trust, FSB11$131<0.01%new13F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC11$131<0.01%013F-HRTimelineGroup
Wealth Preservation Advisors, LLC8$95<0.01%new13F-HRTimeline
Truvestments Capital LLC5$59<0.01%013F-HRTimeline
Dunhill Financial, LLC4$49<0.01%013F-HRTimeline
Hughes Financial Services, LLC3$36<0.01%-4813F-HRTimeline
DiNuzzo Private Wealth, Inc.1$12<0.01%-1413F-HRTimeline
Kilter Group LLC1$12<0.01%new13F-HRTimeline
Avion Wealth49$00%013F-HRTimelineValue filed as zero, left out of ratios.

Events

  • Caine Paul sold 12,500 MGNI shares on 2026-10-12, Form 4 filed 2026-10-14. 0001411765-26-000011

    Accepted , ingested