Position in MGNI
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$14,665,349
+$14,279,984 QoQ
Shares Held
1,234,457
+5099.0% QoQ
Ownership
0.862%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2020
21 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in MGNI Over Time
Shares Held
Position Value (USD)
Derivatives in MGNI
reported options exposure · as of Dec 31, 2025CallValue
$288,894
CallShares
17,800
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Advertising Agencies
Communication Services · as of Mar 31, 2026MILLENNIUM MANAGEMENT LLC holds $199,488,680 across 13 Advertising Agencies names. MGNI ranks #5 (7.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | TTD |
Trade Desk, Inc.
|
4,914,295 | $111,505,353 | |
| 2 | APP |
AppLovin Corp
|
44,504 | $17,712,592 | |
| 3 | OMC |
Omnicom Group Inc.
|
226,049 | $17,023,750 | |
| 4 | CCO |
Clear Channel Outdoor Holdings, Inc.
|
6,660,728 | $15,785,925 | |
| 5 | MGNI |
Magnite, Inc.
This page
|
1,234,457 | $14,665,349 | |
| 6 | CRTO |
Criteo S.A.
|
435,330 | $7,805,466 | |
| 7 | DV |
DoubleVerify Holdings, Inc.
|
763,607 | $7,254,266 | |
| 8 | WPP |
WPP plc
|
460,354 | $7,158,504 |
All Filings in MGNI
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $14,665,349 | 1,234,457 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $385,365 | 23,744 | Shares | Sole | 2026-02-17 | |
| 2025-12-31 | $288,894 | 17,800 | Call | Sole | 2026-02-17 | |
| 2025-09-30 | $596,772 | 27,400 | Call | Sole | 2025-11-14 | |
| 2025-09-30 | $14,730,881 | 676,349 | Shares | Sole | 2025-11-14 | |
| 2025-03-31 | $4,957,405 | 434,479 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $249,944 | 15,700 | Put | Sole | 2025-02-14 | |
| 2024-12-31 | $3,485,938 | 218,966 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $2,108,371 | 152,229 | Shares | Sole | 2024-11-14 | |
| 2024-09-30 | $217,445 | 15,700 | Put | Sole | 2024-11-14 | |
| 2024-06-30 | $448,112 | 33,718 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $162,744 | 15,139 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $2,849,559 | 305,092 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $3,960,920 | 525,321 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $592,273 | 43,390 | Shares | Sole | 2023-08-14 | |
| 2022-12-31 | $327,686 | 30,943 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $398,332 | 60,629 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $663,424 | 74,710 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $6,584,260 | 498,430 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $18,407,742 | 1,051,871 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $11,174,380 | 399,085 | Shares | Sole | 2021-11-15 | |
| 2021-06-30 | $21,997,928 | 650,057 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $15,716,097 | 377,700 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $35,434,119 | 1,153,830 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $301,226 | 43,342 | Shares | Sole | 2020-11-16 | |
| No filing history on record for this holder in this stock. | ||||||