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MGNI research notebook

Read the disclosures. Follow the relationships. Keep the dates in view.

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Filing timeline

Download filings CSV

SEC submissions · retrieved 2026-09-07 · 8010 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 4 · Ownership change

    Report date 2026-09-01 · 0001966857-26-000013

  2. 4 · Ownership change

    Report date 2026-08-26 · 0001781873-26-000003

  3. 4 · Ownership change

    Report date 2026-08-15 · 0001966857-26-000011

  4. 4 · Ownership change

    Report date 2026-08-15 · 0001865116-26-000009

  5. 4 · Ownership change

    Report date 2026-08-15 · 0001807986-26-000007

  6. 4 · Ownership change

    Report date 2026-08-15 · 0001778484-26-000008

  7. 4 · Ownership change

    Report date 2026-08-15 · 0001700262-26-000009

  8. 4 · Ownership change

    Report date 2026-08-15 · 0001523288-26-000010

  9. 10-Q · Quarterly report

    Report date 2026-06-30 · 0001628280-26-053343

  10. 8-K · Current report

    Report date 2026-08-05 · 0001628280-26-053334 · Items 2.02,9.01

  11. 8-K · Current report

    Report date 2026-06-08 · 0001628280-26-042512 · Items 5.07

  12. 8-K · Current report

    Report date 2026-05-06 · 0001595974-26-000023 · Items 2.02,9.01

  13. 10-Q · Quarterly report

    Report date 2026-03-31 · 0001595974-26-000022

  14. DEF 14A · Proxy statement

    Report date 2026-06-08 · 0001999371-26-008635

  15. 8-K · Current report

    Report date 2026-04-20 · 0001595974-26-000016 · Items 5.02,7.01,9.01

  16. 8-K · Current report

    Report date 2026-04-07 · 0001595974-26-000013 · Items 5.02

  17. 8-K · Current report

    Report date 2026-02-25 · 0001595974-26-000010 · Items 2.02,9.01

  18. 10-K · Annual report

    Report date 2025-12-31 · 0001595974-26-000007

  19. 10-Q · Quarterly report

    Report date 2025-09-30 · 0001595974-25-000043

  20. 8-K · Current report

    Report date 2025-11-05 · 0001595974-25-000041 · Items 2.02,9.01

  21. 8-K · Current report

    Report date 2025-09-16 · 0001595974-25-000035 · Items 7.01,8.01,9.01

  22. 8-K · Current report

    Report date 2025-08-31 · 0001595974-25-000030 · Items 1.01

  23. 8-K · Current report

    Report date 2025-08-06 · 0001595974-25-000028 · Items 2.02,9.01

  24. 10-Q · Quarterly report

    Report date 2025-06-30 · 0001595974-25-000027

  25. 8-K · Current report

    Report date 2025-06-05 · 0001595974-25-000020 · Items 5.07

  26. 10-Q · Quarterly report

    Report date 2025-03-31 · 0001595974-25-000017

  27. 8-K · Current report

    Report date 2025-05-07 · 0001595974-25-000015 · Items 2.02,9.01

  28. DEF 14A · Proxy statement

    Report date 2025-06-05 · 0001999371-25-004317

  29. 8-K · Current report

    Report date 2025-03-18 · 0001193125-25-056671 · Items 1.01,7.01,9.01

  30. 10-K · Annual report

    Report date 2024-12-31 · 0001595974-25-000008

  31. 8-K · Current report

    Report date 2025-02-26 · 0001595974-25-000006 · Items 2.02,9.01

  32. 8-K · Current report

    Report date 2024-12-11 · 0001595974-24-000045 · Items 5.02

  33. SC 13G/A · Ownership disclosure

    0000950103-24-016193

  34. SC 13G/A · Ownership disclosure

    0000315066-24-002794

  35. 10-Q · Quarterly report

    Report date 2024-09-30 · 0001595974-24-000041

  36. 8-K · Current report

    Report date 2024-11-07 · 0001595974-24-000039 · Items 2.02,9.01

  37. 8-K · Current report

    Report date 2024-09-18 · 0001193125-24-221440 · Items 1.01,7.01,9.01

  38. 10-Q · Quarterly report

    Report date 2024-06-30 · 0001595974-24-000032

  39. 8-K · Current report

    Report date 2024-08-07 · 0001595974-24-000031 · Items 2.02,9.01

  40. 8-K · Current report

    Report date 2024-06-12 · 0001595974-24-000025 · Items 5.07

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-09-07 · 2026 Q2: filings in this completed quarter; not a live transaction feed

Purchases and sales include open-market or private transactions. Grants, exercises and tax withholding are shown separately. Amendments and joint reports can overlap; rows are not a net-buying score. Prices retain the filing's units; consult its footnotes.

Transaction rows by code · counts, not monetary totals
Purchase: 0 transaction rows0PSale: 11 transaction rows11SGrant / award: 8 transaction rows8AExercise / conversion: 4 transaction rows4MTax / exercise payment: 7 transaction rows7FGift: 0 transaction rows0G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

30 matching transaction rows.

Transaction / filedReporting ownerTypeSecuritySharesReported price
2026-06-17
2026-06-18
Buckley Sean PatrickS · Sale
Disposed
Common Stock19233.019.0
2026-06-17
2026-06-17
Buonasera DavidS · Sale
Disposed
Common Stock1409.019.0
2026-06-16
2026-06-17
Knopper Douglas SS · Sale
Disposed
Common Stock37337.018.1
2026-06-16
2026-06-17
Buonasera DavidS · Sale
Disposed
Common Stock11233.018.0
2026-06-16
2026-06-17
BARRETT MICHAEL G.S · Sale
Disposed
Common Stock100000.017.5
2026-06-16
2026-06-17
BARRETT MICHAEL G.M · Exercise / conversion
Acquired
Common Stock100000.05.8
2026-06-16
2026-06-17
BARRETT MICHAEL G.M · Exercise / conversion
Disposed
Employee Stock Option (Right to Buy)
Derivative security
100000.00.0
2026-06-15
2026-06-17
Buonasera DavidS · Sale
Disposed
Common Stock1057.017.0
2026-06-15
2026-06-17
BARRETT MICHAEL G.S · Sale
Disposed
Common Stock178596.016.59
2026-06-15
2026-06-17
BARRETT MICHAEL G.M · Exercise / conversion
Acquired
Common Stock178596.05.8
2026-06-15
2026-06-17
BARRETT MICHAEL G.M · Exercise / conversion
Disposed
Employee Stock Option (Right to Buy)
Derivative security
178596.00.0
2026-06-10
2026-06-10
Knopper Douglas SS · Sale
Disposed
Common Stock10766.015.73
2026-06-10
2026-06-10
PEARSON DAVID T.S · Sale
Disposed
Common Stock10766.015.65
2026-06-08
2026-06-10
Caine PaulA · Grant / award
Acquired
Common Stock13798.00.0
2026-06-08
2026-06-10
Yu DianeA · Grant / award
Acquired
Common Stock13798.00.0
2026-06-08
2026-06-10
Spillane Robert FA · Grant / award
Acquired
Common Stock13798.00.0
2026-06-08
2026-06-10
Harden Sarah PatriciaA · Grant / award
Acquired
Common Stock13798.00.0
2026-06-08
2026-06-10
Knopper Douglas SA · Grant / award
Acquired
Common Stock13798.00.0
2026-06-08
2026-06-10
Rossman JamesA · Grant / award
Acquired
Common Stock13798.00.0
2026-06-08
2026-06-10
Lam RachelA · Grant / award
Acquired
Common Stock13798.00.0
2026-06-08
2026-06-10
PEARSON DAVID T.A · Grant / award
Acquired
Common Stock13798.00.0
2026-06-01
2026-06-03
Buonasera David
10b5-1 checkbox reported
S · Sale
Disposed
Common Stock1409.015.0
2026-05-19
2026-05-21
Spillane Robert FS · Sale
Disposed
Common Stock10000.013.33
2026-05-15
2026-05-19
Buonasera DavidF · Tax / exercise payment
Disposed
Common Stock8335.012.82
2026-05-15
2026-05-19
Buckley Sean PatrickF · Tax / exercise payment
Disposed
Common Stock12019.012.82
2026-05-15
2026-05-19
Saltz AaronF · Tax / exercise payment
Disposed
Common Stock5627.012.82
2026-05-15
2026-05-19
Gephart BrianF · Tax / exercise payment
Disposed
Common Stock3789.012.82
2026-05-15
2026-05-19
Evans Katie SeitzF · Tax / exercise payment
Disposed
Common Stock11204.012.82
2026-05-15
2026-05-19
Day DavidF · Tax / exercise payment
Disposed
Common Stock14170.012.82
2026-05-15
2026-05-19
BARRETT MICHAEL G.F · Tax / exercise payment
Disposed
Common Stock10404.012.82

Identity & relationships

Wikidata structured data · retrieved 2026-09-07 · 1611 unambiguous CIK-linked entities; coverage is incomplete

These are sourced identity and relationship claims, with incomplete coverage. Headquarters locations do not describe sales, assets or operating exposure.

SEC issuer · 0001595974MAGNITE, INC.

No parent relationship is available in this import; this is not proof of independence.

Legal Entity Identifier
54930018FR2YX1HHSB02
GLEIF legal name
MAGNITE, INC.
Entity / LEI registration status
ACTIVE / ISSUED
Reference data updated
2025-11-17T16:01:34Z

direct-parent: no parent LEI supplied

ultimate-parent: no parent LEI supplied

GLEIF legal entity reference data · retrieved 2026-09-07 · 1177 checked identities; 0 unavailable records

Search names and former names

View Wikidata identity and references ↗

  • RUBICON PROJECT, INC. · former SEC name · 2014-01-16 to 2020-06-30
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Revenue in constant purchasing power

USD revenue expressed in 2026-07 consumer-price dollars. Each annual period uses a CPI-U average weighted by the days in its actual reporting interval. This is a purchasing-power comparison, not a company-specific price or volume measure.

Year endedReported USD revenueCPI-adjusted USD revenue
2024-12-31$668.17M$711.24M
2023-12-31$619.71M$679.09M
2022-12-31$577.07M$658.33M
2021-12-31$468.41M$577.13M
2020-12-31$221.63M$285.94M
2019-12-31$156.41M$204.28M
2018-12-31$124.69M$165.80M

Bureau of Labor Statistics · retrieved 2026-09-07 · 9 selected series; gaps remain missing

Explore the CPI history ↗