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MGNI · Magnite, Inc.
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MGNI Magnite (MGNI) Insider Trading, Ownership & Congress Trades

Software & IT · Services-computer programming, data processing, etc. · CIK 0001595974
Quote by TradingView
Form 144 · 24
Insider buyers, 180 days
0
House members buying, 1 year
0
STOCK Act, US House only, disclosed up to 45 days after the trade
Funds added, last quarter
173
13F, latest reported quarter
Conversions, 180 days
9
Codes C/M, not in net · $4.6M priced

What the filings say about MGNI

Insiders, 180 days
-$25.9M net sold
12 sellers · 29% of sales under a 10b5-1 plan
Planned sales (Form 144), 90 days
$16.3M
24 notices

Magnite insider trades (Form 4)

Form 4 buys and sells (codes P and S). Grants, option exercises and conversions excluded.

Over the last 180 days, MAGNITE, INC. insiders sold a net $25.9M of stock across 233 Form 4 purchases and sales, with no insider buying. Source: SEC Form 4 filings, as of 2026-10-28.

Insider
Filed
Shares
Value
Since filing
Caine Paul
Director
SELL
2026-10-14 SECtraded 2026-10-12
12,500
$316.1K
-11.7%
Context
  • 17 earlier Form 4 trades (code P or S) here by this insider (17 sales), the last on Sep 17, 2026.
  • The trade is 10.0% of the 124,901 shares held after it.
  • 3 other insiders sold within 30 days.
  • 173 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director Caine Paul sold about $316.1K of MGNI under a 10b5-1 plan on Oct 12, 2026; 3 other insiders sold within 30 days and 173 funds added in the latest 13F quarter.
Knopper Douglas S
Director
SELL
2026-09-18 SECtraded 2026-09-17
37,337
$981.2K
-14.6%
Context
  • 5 earlier Form 4 trades (code P or S) here by this insider (5 sales), the last on Aug 6, 2026.
  • The trade is 73.0% of the 51,136 shares held after it.
  • 7 other insiders sold within 30 days.
  • 173 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director Knopper Douglas S sold about $981.2K of MGNI under a 10b5-1 plan on Sep 17, 2026; 7 other insiders sold within 30 days and 173 funds added in the latest 13F quarter.
Caine Paul
Director
SELL
2026-09-18 SECtraded 2026-09-17
7,500
$198.8K
-14.6%
Context
  • 16 earlier Form 4 trades (code P or S) here by this insider (16 sales), the last on Sep 10, 2026.
  • The trade is 5.5% of the 137,401 shares held after it.
  • 7 other insiders sold within 30 days.
  • 173 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director Caine Paul sold about $198.8K of MGNI under a 10b5-1 plan on Sep 17, 2026; 7 other insiders sold within 30 days and 173 funds added in the latest 13F quarter.
Spillane Robert F
Director
SELL
2026-09-16 SECtraded 2026-09-14
10,363
$246.2K
-15.6%
Context
  • 6 earlier Form 4 trades (code P or S) here by this insider (6 sales), the last on May 19, 2026.
  • The trade is 18.0% of the 57,715 shares held after it.
  • 7 other insiders sold within 30 days.
  • 173 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director Spillane Robert F sold about $246.2K of MGNI on Sep 14, 2026; 7 other insiders sold within 30 days and 173 funds added in the latest 13F quarter.
Buonasera David
CHIEF TECHNOLOGY OFFICER
SELL
2026-09-16 SECtraded 2026-09-14
1,165
$28.0K
-15.6%
Context
  • 27 earlier Form 4 trades (code P or S) here by this insider (27 sales), the last on Sep 2, 2026.
  • The trade is 0.5% of the 245,155 shares held after it.
  • 7 other insiders sold within 30 days.
  • 173 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: CHIEF TECHNOLOGY OFFICER Buonasera David sold about $28.0K of MGNI under a 10b5-1 plan on Sep 14, 2026; 7 other insiders sold within 30 days and 173 funds added in the latest 13F quarter.
233 transactions on record
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
See all insider buying · insider selling
Showing the latest few. to see 228 more transactions and use the screener and CSV export. We store only your email; there is no password.
Seven facts, ranked against the sector · Rank is not a forecast
Insiders
net -$25.9M over 180 days
-$16.5M over 90 days
below 79% of Software & IT
Congress
no House purchase disclosed in the last 12 months
Funds
173 funds bought in last quarter
more than 68% of Software & IT
Revenue
+6.9% year over year
below 56% of Software & IT
Margin
20.3% net margin
more than 85% of Software & IT
Buybacks
$35.5M repurchased, FY to 2026-06-30
below 63% of Software & IT
Short interest
7.4% of the float short (float per yahoo 2026-10-27) · 6.1 days to cover · settled 2026-10-15
more than 76% of Software & IT
What changed in the last 30 days
Oct 14Director Caine Paul sold $316.1K under a 10b5-1 plan (Oct 12)
Why it matters
A 10b5-1 plan schedules trades months ahead, so this says little about what the insider thinks today.

Watch MGNI

A free account keeps a watchlist and can send one email a day when insiders, funds or Congress file on the names in it. No password and no card.

The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
+13.0%12M
-41%-16%+9%+34%2025-102025-122026-022026-042026-062026-082026-10 2026-08-06 · BARRETT MICHAEL G. sold $6.7M2026-06-15 · BARRETT MICHAEL G. sold $3.0M2026-06-16 · BARRETT MICHAEL G. sold $1.8M2026-06-29 · BARRETT MICHAEL G. sold $1.5M2026-08-06 · Buckley Sean Patrick sold $1.2M2026-09-17 · Knopper Douglas S sold $981.2K2026-09-10 · Saltz Aaron sold $936.4K2026-08-06 · Knopper Douglas S sold $848.3K2026-07-15 · BARRETT MICHAEL G. sold $785.4K2026-09-08 · Evans Katie Seitz sold $762.9K2026-08-26 · Harden Sarah Patricia sold $712.1K2026-06-16 · Knopper Douglas S sold $675.8K2026-08-06 · Evans Katie Seitz sold $480.0K2026-08-28 · Harden Sarah Patricia sold $442.5K2026-08-06 · Buckley Sean Patrick sold $442.5K2026-07-07 · Buckley Sean Patrick sold $404.5K2026-06-17 · Buckley Sean Patrick sold $365.4K2026-09-11 · Evans Katie Seitz sold $335.9K2026-10-12 · Caine Paul sold $316.1K2026-08-10 · Gephart Brian sold $308.0K2025-12-17 · Soroca Adam Lee sold $283.2K2026-09-09 · Evans Katie Seitz sold $260.4K2026-02-18 · Soroca Adam Lee sold $258.3K2026-09-14 · Spillane Robert F sold $246.2K2026-08-10 · Lam Rachel sold $241.6K2026-06-16 · Buonasera David sold $202.2K2026-08-17 · Buckley Sean Patrick sold $201.1K2026-09-17 · Caine Paul sold $198.8K2026-07-01 · Buonasera David sold $187.5K2026-08-14 · Caine Paul sold $187.5K2025-11-21 · Spillane Robert F sold $177.8K2026-06-10 · Knopper Douglas S sold $169.3K2026-06-10 · PEARSON DAVID T. sold $168.5K2025-11-18 · Soroca Adam Lee sold $143.6K2026-05-19 · Spillane Robert F sold $133.3K2026-09-01 · Buonasera David sold $125.8K2026-08-10 · Caine Paul sold $121.8K2026-09-10 · Caine Paul sold $117.7K2026-07-10 · Caine Paul sold $103.2K2025-10-24 · Caine Paul sold $100.0K2026-08-06 · Buonasera David sold $95.3K2026-08-18 · Buckley Sean Patrick sold $69.0K2026-09-17 · PAUL CAINE filed to sell $475.6K2026-09-17 · Douglas S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13 filed to sell $887.9K2026-09-14 · DAVID BUONASERA filed to sell $27.7K2026-09-14 · ROBERT SPILLANE filed to sell $246.2K2026-09-11 · KATHERYN EVANS filed to sell $335.9K2026-09-10 · PAUL CAINE filed to sell $235.8K2026-09-10 · AARON SALTZ filed to sell $1.4M2026-09-09 · KATHERYN EVANS filed to sell $260.4K2026-09-08 · KATHERYN EVANS filed to sell $762.9K2026-09-02 · DAVID BUONASERA filed to sell $26.1K2026-09-01 · DAVID BUONASERA filed to sell $125.8K2026-08-28 · SARAH PATRICIA HARDEN filed to sell $442.5K2026-08-26 · SARAH PATRICIA HARDEN filed to sell $712.2K2026-08-18 · SEAN BUCKLEY filed to sell $66.7K2026-08-17 · SEAN BUCKLEY filed to sell $204.5K2026-08-14 · PAUL CAINE filed to sell $61.5K2026-08-10 · BRIAN GEPHART filed to sell $308.0K2026-08-10 · RACHEL LAM filed to sell $241.6K2026-08-06 · MICHAEL G BARRETT filed to sell $6.7M2026-08-06 · SEAN BUCKLEY filed to sell $1.4M
Insider sellForm 144 (planned sale)
Indexed to 100, dividend-adjusted, not a price chart. When a name files heavily, the largest trades are drawn first.

Who owns MGNI: institutional holders (13F)

13F holdings, latest reported quarter
BlackRock, Inc.
12,713,156 sh
$241.3M
VANGUARD PORTFOLIO MANAGEMENT LLC
8,197,286 sh
$155.6M
FMR LLC
7,759,426 sh
$147.3M
VANGUARD CAPITAL MANAGEMENT LLC
6,225,195 sh
$118.2M
WELLINGTON MANAGEMENT GROUP LLP
6,044,492 sh
$114.7M

Congress trades in MGNI

No Congress trades reported
No House member has disclosed a trade in this stock. See what Congress is buying.

Activist and 5% holders (13D/13G)

No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.

MGNI planned insider sales (Form 144)

Notice of intent to sell, filed before any sale
PAUL CAINE
Filed 2026-09-17
$475.6K
Douglas S. Knopper & Abigail L. Knopper TTEES of the Knopper Joint Mgmt Trust 11/15/13
Filed 2026-09-17
$887.9K
DAVID BUONASERA
Filed 2026-09-14
$27.7K
ROBERT SPILLANE
Filed 2026-09-14
$246.2K
KATHERYN EVANS
Filed 2026-09-11
$335.9K

MGNI mutual fund holders (N-PORT)

Funds ranked by the share of their own portfolio in this stock (N-PORT).
Clough Select Equity ETF
$1.6M position · as of 2026-07-31
3.0%
Royce Smaller-Companies Growth Fund
$6.7M position · as of 2026-06-30
2.8%
Clough Hedged Equity ETF
$1.6M position · as of 2026-07-31
2.8%
Harbor Active Small Cap Growth ETF
$551.4K position · as of 2026-07-31
2.1%
LKCM Small Cap Equity Fund
$6.6M position · as of 2026-06-30
1.8%
Nuveen Small Cap Growth Opportunities Fund
$4.4M position · as of 2026-07-31
1.7%
SEC N-PORT, monthly, about 60 days late · funds ≥ $10M · % is the share of the fund's own portfolio
Executive pay vs shareholder return · Mr. Barrett
CEO pay, headline and as actually paid, against the company's return and its chosen peers' (DEF 14A).
FY
CEO total
Actually paid
Other execs, avg
TSR
Peer TSR
2025
$5.8M
$6.1M
$3.8M
-47%
-36%
2024
$5.2M
$13.0M
$2.8M
-48%
-43%
2023
$5.6M
$2.5M
$2.9M
-70%
-44%
2022
$6.1M
-$3.5M
$3.6M
-66%
-60%
2021
$18.3M
-$31.0K
$7.1M
-43%
-7%
Tagged by the company under SEC Item 402(v). Returns are cumulative from the start of the disclosure period. Green where the company beat its own peer group.
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
Insiders have filed to sell, before selling.
The record shows a net $25.9M sold by insiders over 180 days, 173 funds added last quarter, $16.3M in planned Form 144 sales. Each figure is a federal filing, dated the day it went public.
Backtest this pattern Open the screener
Same sector, ranked by filing activity
Sector by SEC SIC code
TEAMMETACRWVCRMCRWDNETDDOGAPPIOTPCTYDUOLMDB

MGNI financials

Revenue growth
+6.9%
XBRL, annual
Net margin
20.3%
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$742.0M
four quarters, 2025-07-01 to 2026-06-30
Net margin, TTM
+22.5%
net income over revenue, 2025-07-01 to 2026-06-30
Free cash flow, TTM
$215.8M
operating cash flow minus capex, 2025-07-01 to 2026-06-30
Debt to equity
0.37x
long-term 2026-06-30 plus current 2026-06-30; equity 2026-06-30
Cash flow to debt
0.80x
TTM operating cash flow over long-term 2026-06-30 plus current 2026-06-30
Return on equity
+19.6%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on assets
+5.6%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on invested capital
n/a
effective tax rate -70%, not meaningful
Return on capital employed
+9.3%
operating income (EBIT proxy) over average of 2025-06-30 and 2026-06-30 minus current liabilities
P/E, trailing
19.65x
close 2026-10-26 over four quarters of diluted EPS, 2025-07-01 to 2026-06-30
Enterprise value
$3.1B
market value at close 2026-10-26 on 2026-07-29 shares, plus long-term 2026-06-30 plus current 2026-06-30, minus cash 2026-06-30
FCF yield
+7.0%
TTM free cash flow over market value at close 2026-10-26
PEG, trailing
0.08x
P/E over trailing EPS growth of 255%: four quarters to 2026-06-30 against the four to 2025-06-30
Price as of 2026-10-26. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
2025-122024-122023-122022-12
Revenue$714.0M$668.2M$619.7M$577.1M
Operating income$97.6M$51.1M-$155.0M-$112.8M
Net income$144.6M$22.8M-$159.2M-$130.3M
EPS (diluted)0.950.16-1.17-0.98
Operating cash flow$236.2M$235.2M$214.4M$192.6M
Cash$553.4M$483.2M$326.2M$326.3M
Long-term debt$347.7M$550.1M$533.0M$722.8M
Buybacks$46.3M$14.6M$0$15.7M
SEC XBRL, fiscal years, as known on 2026-10-28

MGNI Stock Sonar score 6/7 axes

Find similar shapesCompare

MGNI ranks highest on profitability (73rd percentile) and institutional and government (68th), and lowest on insider conviction (9th), among Software & IT peers.

ProfitHealthGrowthInsidersInstitutionsRisk
Profitability
73
Inputs
  • Return on equity+19.6% · 78 pct, sector of 286
  • Return on assets+5.6% · 72 pct, sector of 381
  • Return on invested capitaleffective tax rate -70%, not meaningful
  • Return on capital employed+9.3% · 70 pct, sector of 294
Financial health
57
Inputs
  • Debt to equity0.37x · 38 pct, sector of 288
  • Cash flow to debt0.80x · 76 pct, sector of 241
Growth
44
Inputs
  • Revenue growth, YoY+6.9% · 44 pct, sector of 480
  • Backlog growth, YoYno backlog line filed, or no year-earlier backlog
Insider conviction
9
Inputs
  • Net Form 4 buying (codes P and S), 180d-$20.7M · 17 pct, sector of 284
  • Insider buyers, 180d0 · 0 pct, sector of 290
Institutional and government
68
Inputs
  • Funds adding, latest quarter173 · 68 pct, sector of 415
  • Congress net buyers, 365dno Congress trades in 365 days
  • Federal contracts, 180dno federal contracts in 180 days
  • Lobbying spend, 4 quartersno lobbying filings in the last four quarters
Risk and compliance
46
Inputs
  • Short interest, % of float+7.4% · 37 pct, sector of 528
  • Recalls per $1B revenue, 3ynot measured for this sector, almost no peer has an event
  • EPA cases per $1B revenue, 5ynot measured for this sector, almost no peer has an event
  • New text in Risk Factors, latest 10-K+10.7% · 54 pct, sector of 316
1 not measured: US patents
  • US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet

6 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored

MGNI filings, in plain words

Are Magnite insiders buying or selling MGNI?

In the 180 days to 2026-10-28, Magnite insiders were net sellers, a net $25.9M across purchases and sales reported on Form 4, by 12 sellers.

Are there planned insider sales of MGNI?

Yes. 24 Form 144 notices of planned insider sales were filed in the 90 days to 2026-10-28, covering $16.3M of stock; the latest, by PAUL CAINE, was filed 2026-09-17.

Read the full summary

In the 180 days to 2026-10-28, Magnite insiders were net sellers of MGNI, a net $25.9M across purchases and sales reported on Form 4 by 12 sellers. 29% of the 45 insider sales were made under a Rule 10b5-1 plan; the rest were not flagged as planned. Insiders filed 24 Form 144 notices of intent to sell in the 90 days to 2026-10-28, covering $16.3M of stock. Each figure is counted from SEC and House filings as of 2026-10-28, dated the day the filing was made public.

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