Position in MGNI
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$3,142,195
-$1,026,045 QoQ
Shares Held
165,553
-52.8% QoQ
Ownership
0.115%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#87
of 305 holders
Holding Since
Mar 2021
15 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MGNI Over Time
Shares Held
Position Value (USD)
Position in Advertising Agencies
Communication Services · as of Jun 30, 2026SEI INVESTMENTS CO holds $315,058,814 across 13 Advertising Agencies names. MGNI ranks #4 (1.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | APP |
AppLovin Corp
|
505,869 | $260,638,883 | |
| 2 | OMC |
Omnicom Group Inc.
|
563,321 | $41,026,667 | |
| 3 | CRTO |
Criteo S.A.
|
185,198 | $3,385,419 | |
| 4 | MGNI |
Magnite, Inc.
This page
|
165,553 | $3,142,195 | |
| 5 | DV |
DoubleVerify Holdings, Inc.
|
173,426 | $1,879,937 | |
| 6 | STGW |
Stagwell Inc
|
167,212 | $1,242,385 | |
| 7 | TTD |
Trade Desk, Inc.
|
65,259 | $1,179,882 | |
| 8 | FLNT |
Fluent, Inc.
|
254,055 | $947,625 |
All Filings in MGNI
Export CSV
15 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $3,142,195 | 165,553 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $4,168,240 | 350,862 | Shares | Sole | 2026-05-13 | |
| 2025-12-31 | $3,433,244 | 211,537 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $1,633,128 | 74,983 | Shares | Sole | 2025-11-13 | |
| 2025-06-30 | $1,980,637 | 82,116 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $453,695 | 39,763 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $735,009 | 46,169 | Shares | Sole | 2025-02-11 | |
| 2024-09-30 | $342,164 | 24,705 | Shares | Sole | 2024-11-12 | |
| 2023-06-30 | $374,910 | 27,466 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $195,375 | 21,099 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $128,022 | 12,089 | Shares | Sole | 2023-02-10 | |
| 2022-06-30 | $379,006 | 42,681 | Shares | Sole | 2022-08-15 | |
| 2021-09-30 | $635,488 | 22,696 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $4,214,263 | 124,535 | Shares | Sole | 2021-08-06 | |
| 2021-03-31 | $2,991,717 | 71,899 | Shares | Sole | 2021-05-12 | |
| No filing history on record for this holder in this stock. | ||||||