Skip to content

MGNI · Magnite, Inc.

Communication Services · −4.5% on Oct 16

☆ Add to watchlist

Updated Oct 17 · 6 feeds behind: Insider filings, 3 days, and 5 more · Every feed →

On this page

The market view

Price chart

The interactive MGNI chart (by TradingView) loads here.

Our take

1 rule fired on MGNI

In short: none of these rules has solid or some evidence yet, so they show no clear lean on MGNI.

How each did in past tests, against similar stocks over 3 months. Past results don't predict future ones.

The 0–100 score for MGNI, and which of these rules are open on it right now
Members see one number for how strongly these rules agree on MGNI, and the day each rule fired. Better-tested rules count more, and so do different kinds of filings that point the same way.
See pricing →
Already a member? Sign in

Compare with this company’s history

Is disclosure activity unusual?

See how many different insiders or members of Congress reported purchases or sales of MGNI. Each bar covers 28 days, by disclosure date. Several trades by one person count once in each group and period.

Latest period: Sep 22, 2026–Oct 19, 2026 · UTC dates · today is excluded

Insider sales

Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual.

Latest 28 days
1
Earlier median
7
Earlier range
4–8
Distinct filers per 28 daysScale: 0–8
Oct 21, 2025Oct 19, 2026
Earlier periodsLatest 28 daysEarlier median 7Limited or missing history

Who appears in the latest period?

Up to three filers; one example disclosure each.

Inspect this period’s filings

The history behind this view

First stored company disclosure: Jun 10, 2026. Newest disclosure across this feed: Oct 16, 2026.

Earlier periods in the comparison: 3. Outlined periods are missing data, so they are left out of the comparison. The chart scale changes with the category.

Exact counts, dates and filings for all four categories
Insider purchases · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 0; range: 0–0.

Insider purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 20260Partial; excluded
Jun 30, 2026–Jul 27, 20260Within stored history
Jul 28, 2026–Aug 24, 20260Within stored history
Aug 25, 2026–Sep 21, 20260Within stored history
Sep 22, 2026–Oct 19, 2026Latest period0Within stored history
Insider sales · Short history

Only 3 earlier periods are on file to compare with. We need at least 6 full periods before calling a count unusual. Earlier median: 7; range: 4–8.

Insider sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 20265Partial; excluded
Jun 30, 2026–Jul 27, 20264Within stored history
Jul 28, 2026–Aug 24, 20268Within stored history
Aug 25, 2026–Sep 21, 20267Within stored history
Sep 22, 2026–Oct 19, 2026Latest period1Within stored history
Congress purchases · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress purchases: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 2026—Unavailable
Jun 30, 2026–Jul 27, 2026—Unavailable
Jul 28, 2026–Aug 24, 2026—Unavailable
Aug 25, 2026–Sep 21, 2026—Unavailable
Sep 22, 2026–Oct 19, 2026Latest period—Unavailable
Congress sales · History unavailable

No completed-period disclosures for this company are available in this source. Missing history is not zero activity. Earlier median: —; range: unavailable.

Congress sales: distinct filers in stored disclosures
Period and filingsFilersHistory
Oct 21, 2025–Nov 17, 2025—Unavailable
Nov 18, 2025–Dec 15, 2025—Unavailable
Dec 16, 2025–Jan 12, 2026—Unavailable
Jan 13, 2026–Feb 9, 2026—Unavailable
Feb 10, 2026–Mar 9, 2026—Unavailable
Mar 10, 2026–Apr 6, 2026—Unavailable
Apr 7, 2026–May 4, 2026—Unavailable
May 5, 2026–Jun 1, 2026—Unavailable
Jun 2, 2026–Jun 29, 2026—Unavailable
Jun 30, 2026–Jul 27, 2026—Unavailable
Jul 28, 2026–Aug 24, 2026—Unavailable
Aug 25, 2026–Sep 21, 2026—Unavailable
Sep 22, 2026–Oct 19, 2026Latest period—Unavailable
How to read this comparison

The median is the middle count in up to 12 earlier, non-overlapping 28-day periods; the range runs from the smallest to the largest count. The latest period is excluded from both. A comparison needs at least 6 earlier periods, including 3 with activity. The feed’s latest disclosure must be within 7 days of the current period’s end. This freshness check does not verify complete collection.

Insiders include individuals and reporting entities; only purchase and sale codes enter this view. Congress counts reporting members, including their disclosed family transactions. The same filer can appear in purchases and sales, so these categories should not be added into a net count.

These are stored disclosures, not a complete measure of trading. Reporting delays and collection gaps can change the comparison. More activity does not identify a motive or predict a stock’s return.

Company timeline

What has been happening?

May 1, 2026–Oct 16, 2026. Select a month in a category to inspect its records.

Company filings

Insiders

Owners & lobbying

All 36 records in this snapshot
  1. Disclosed
    Paul Caine · Sale

    Transaction dated Oct 12, 2026

  2. Filed
  3. Filed
  4. Filed
  5. Filed
  6. Filed
  7. Disclosed
    Douglas S Knopper · Sale

    Transaction dated Sep 17, 2026

  8. Disclosed
    Paul Caine · Sale

    Transaction dated Sep 17, 2026

  9. Filed
  10. Filed
  11. Disclosed
    David Buonasera · Sale

    Transaction dated Sep 14, 2026

  12. Disclosed
    Robert F Spillane · Sale

    Transaction dated Sep 14, 2026

  13. Filed
  14. Filed
  15. Disclosed
    Aaron Saltz · Sale

    Transaction dated Sep 10, 2026

  16. Disclosed
    Katie Seitz Evans · Sale

    Transaction dated Sep 11, 2026

  17. Filed
  18. Disclosed
    Paul Caine · Sale

    Transaction dated Sep 10, 2026

  19. Disclosed
    Katie Seitz Evans · Sale

    Transaction dated Sep 9, 2026

  20. Disclosed
    Katie Seitz Evans · Sale

    Transaction dated Sep 8, 2026

  21. Disclosed
    David Buonasera · Sale

    Transaction dated Sep 2, 2026

  22. Disclosed
    David Buonasera · Sale

    Transaction dated Sep 1, 2026

  23. Disclosed
    Sarah Patricia Harden · Sale

    Transaction dated Aug 26, 2026

  24. Disclosed
    Sarah Patricia Harden · Sale

    Transaction dated Aug 28, 2026

  25. Disclosed
    Paul Caine · Sale

    Transaction dated Aug 14, 2026

  26. Disclosed
    Sean Patrick Buckley · Sale

    Transaction dated Aug 18, 2026

  27. Disclosed
    Sean Patrick Buckley · Sale

    Transaction dated Aug 17, 2026

  28. Disclosed
    Brian Gephart · Sale

    Transaction dated Aug 10, 2026

  29. Disclosed
    Paul Caine · Sale

    Transaction dated Aug 10, 2026

  30. Disclosed
    Rachel Lam · Sale

    Transaction dated Aug 10, 2026

  31. Disclosed
    David Buonasera · Sale

    Transaction dated Aug 6, 2026

  32. Disclosed
    David Buonasera · Sale

    Transaction dated Aug 6, 2026

  33. Disclosed
    Douglas S Knopper · Sale

    Transaction dated Aug 6, 2026

  34. Disclosed
    Michael G. Barrett · Sale

    Transaction dated Aug 6, 2026

  35. Disclosed
    Sean Patrick Buckley · Sale

    Transaction dated Aug 6, 2026

  36. Filed

Month counts include every record on file. The lists show the newest records on this page. A dash means none on file that month. Trades use disclosure dates; contract dates follow the source record. Nearby events do not establish the cause of a price move.

Who's buying and selling · last 90 days

Congress

No Congress trades on MGNI disclosed in the last 90 days.

See every Congress trade on MGNI →

Company insiders

0 buys · 21 sells (28 filed lots) · $16.5M sold

  1. ▼ SELLPaul Caine DirectorMGNI Magnite, Inc.$316Kdisclosed Oct 14 · filed 2 days after the trade
  2. ▼ SELLPaul Caine DirectorMGNI Magnite, Inc.$199Kdisclosed Sep 18 · filed 1 day after the trade
  3. ▼ SELLDouglas S Knopper DirectorMGNI Magnite, Inc.$981Kdisclosed Sep 18 · filed 1 day after the trade
  4. ▼ SELLDavid Buonasera Chief Technology OfficerMGNI Magnite, Inc.$28Kdisclosed Sep 16 · filed 2 days after the trade
  5. ▼ SELLRobert F Spillane DirectorMGNI Magnite, Inc.$246Kdisclosed Sep 16 · filed 2 days after the trade
  6. ▼ SELLPaul Caine DirectorMGNI Magnite, Inc.$118Kdisclosed Sep 11 · filed 1 day after the trade
  7. ▼ SELLAaron Saltz Chief Legal OfficerMGNI Magnite, Inc.$936Kdisclosed Sep 11 · filed 1 day after the trade
  8. ▼ SELLKatie Seitz Evans InsiderMGNI Magnite, Inc.$336Kdisclosed Sep 11 · filed the same day
  9. ▼ SELLKatie Seitz Evans InsiderMGNI Magnite, Inc.$260Kdisclosed Sep 10 · filed 1 day after the trade
  10. ▼ SELLKatie Seitz Evans InsiderMGNI Magnite, Inc.$763Kdisclosed Sep 10 · filed 2 days after the trade
See every insider trade on MGNI →

Big holders (Schedule 13D / 13G): 1 filing in the last 90 days · newest: Fmr LLC (13G), Aug 6, 2026 ↗

Filings & events

Company filings (8-K) 42

Events the company must report to the SEC within days — results, deals, departures, restatements.

What it files 8-Ks about

  • Quarterly or yearly results · item 2.029
  • Shared information with investors · item 7.015
  • Signed a major agreement · item 1.013
  • Directors or officers joined, left or got new pay · item 5.023
  • Shareholder vote results · item 5.073
  • Other events · item 8.011

Filing red flags 11

Warning signs in the company's own SEC filings — going-concern doubts, control weaknesses, staff comment letters, late filings, restatements, Wells notices, clinical holds, dividend cuts.

Planned insider sales (Form 144) 168

Notices insiders file before they sell certain shares, such as ones they got straight from the company.

24 in the last 90 days · 168 notices on file

The notices on file don't give the sale's size; each sale shows up under company insiders once it is reported.

5% owners (13D / 13G) 7

Investors who reported owning 5% or more — 13D for owners who may push for changes, 13G for owners who just hold.

Push for changes, or just hold?

  • 13D, may push for changes: 0 filings
  • 13G, just holds: 7 filings

Filed most: Fmr LLC (2) · Capital Research Global Investors (2) · Vanguard Capital Management LLC (1) · Vanguard Portfolio Management LLC (1)

Biggest named funds (13F)

The largest MGNI holdings among the well-known funds whose quarterly 13F filings we read — opens here.

Every disclosed trade on MGNI

  1. ▼ SELLPaul Caine DirectorMGNI Magnite, Inc.$316Kdisclosed Oct 14 · filed 2 days after the trade
  2. ▼ SELLPaul Caine DirectorMGNI Magnite, Inc.$199Kdisclosed Sep 18 · filed 1 day after the trade
  3. ▼ SELLDouglas S Knopper DirectorMGNI Magnite, Inc.$981Kdisclosed Sep 18 · filed 1 day after the trade
  4. ▼ SELLDavid Buonasera Chief Technology OfficerMGNI Magnite, Inc.$28Kdisclosed Sep 16 · filed 2 days after the trade
  5. ▼ SELLRobert F Spillane DirectorMGNI Magnite, Inc.$246Kdisclosed Sep 16 · filed 2 days after the trade
  6. ▼ SELLPaul Caine DirectorMGNI Magnite, Inc.$118Kdisclosed Sep 11 · filed 1 day after the trade
  7. ▼ SELLAaron Saltz Chief Legal OfficerMGNI Magnite, Inc.$936Kdisclosed Sep 11 · filed 1 day after the trade
  8. ▼ SELLKatie Seitz Evans InsiderMGNI Magnite, Inc.$336Kdisclosed Sep 11 · filed the same day
  9. ▼ SELLKatie Seitz Evans InsiderMGNI Magnite, Inc.$260Kdisclosed Sep 10 · filed 1 day after the trade
  10. ▼ SELLKatie Seitz Evans InsiderMGNI Magnite, Inc.$763Kdisclosed Sep 10 · filed 2 days after the trade
  11. ▼ SELLDavid Buonasera Chief Technology OfficerMGNI Magnite, Inc.$26.1Kdisclosed Sep 3 · filed 1 day after the trade
  12. ▼ SELLDavid Buonasera Chief Technology OfficerMGNI Magnite, Inc.$126Kdisclosed Sep 3 · filed 2 days after the trade
  13. ▼ SELLSarah Patricia Harden DirectorMGNI Magnite, Inc.$712Kdisclosed Aug 28 · filed 2 days after the trade
  14. ▼ SELLSarah Patricia Harden DirectorMGNI Magnite, Inc.$442Kdisclosed Aug 28 · filed the same day
  15. ▼ SELLSean Patrick Buckley InsiderMGNI Magnite, Inc.$69Kdisclosed Aug 18 · filed the same day
  16. ▼ SELLSean Patrick Buckley InsiderMGNI Magnite, Inc.$201Kdisclosed Aug 18 · filed 1 day after the trade
  17. ▼ SELLPaul Caine DirectorMGNI Magnite, Inc.$188Kdisclosed Aug 18 · filed 4 days after the trade
  18. ▼ SELLRachel Lam DirectorMGNI Magnite, Inc.$242Kdisclosed Aug 12 · filed 2 days after the trade
  19. ▼ SELLPaul Caine DirectorMGNI Magnite, Inc.$122Kdisclosed Aug 12 · filed 2 days after the trade
  20. ▼ SELLBrian Gephart Chief Accounting OfficerMGNI Magnite, Inc.$308Kdisclosed Aug 12 · filed 2 days after the trade
  21. ▼ SELLSean Patrick Buckley InsiderMGNI Magnite, Inc.$442Kdisclosed Aug 7 · filed 1 day after the trade
  22. ▼ SELLMichael G. Barrett CEOMGNI Magnite, Inc.$6.7Mdisclosed Aug 7 · filed 1 day after the trade
  23. ▼ SELLDavid Buonasera Chief Technology OfficerMGNI Magnite, Inc.$95.3Kdisclosed Aug 7 · filed 1 day after the trade
  24. ▼ SELLDavid Buonasera Chief Technology OfficerMGNI Magnite, Inc.$62.4Kdisclosed Aug 7 · filed 1 day after the trade
  25. ▼ SELLDouglas S Knopper DirectorMGNI Magnite, Inc.$848Kdisclosed Aug 7 · filed 1 day after the trade
See all 43 trades on MGNI →
People & votes

Which members of Congress traded MGNI, sponsored bills that touch it and voted on them — opens here.