Position in MGNI
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$8,974,977
-$3,533,569 QoQ
Shares Held
472,865
-55.1% QoQ
Ownership
0.330%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#53
of 306 holders
Holding Since
Sep 2020
24 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in MGNI Over Time
Shares Held
Position Value (USD)
Derivatives in MGNI
reported options exposure · as of Jun 30, 2026CallValue
$6,413,342
CallShares
337,900
PutValue
$22,174,334
PutShares
1,168,300
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 Jun 30, 2026CITADEL ADVISORS LLC holds $352,974,003 across 25 Advertising Agencies names. MGNI ranks #5 (2.5% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | OMC |
Omnicom Group Inc.
|
1,644,047 | $119,735,942 | |
| 2 | APP |
AppLovin Corp
|
186,604 | $96,143,978 | |
| 3 | TTD |
Trade Desk, Inc.
|
3,115,653 | $56,331,005 | |
| 4 | LFTO |
Liftoff Mobile, Inc.
|
1,697,259 | $40,768,161 | |
| 5 | MGNI |
Magnite, Inc.
This page
|
472,865 | $8,974,977 | |
| 6 | ZD |
Ziff Davis, Inc.
|
122,592 | $6,420,142 | |
| 7 | DV |
DoubleVerify Holdings, Inc.
|
471,127 | $5,107,015 | |
| 8 | CRTO |
Criteo S.A.
|
227,856 | $4,165,207 |
All Filings in MGNI
Export CSV
50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $8,974,977 | 472,865 | Shares | Defined | 2026-08-14 | |
| 2026-06-30 | $22,174,334 | 1,168,300 | Put | Defined | 2026-08-14 | |
| 2026-06-30 | $6,413,342 | 337,900 | Call | Defined | 2026-08-14 | |
| 2026-03-31 | $12,508,546 | 1,052,908 | Shares | Defined | 2026-05-15 | |
| 2026-03-31 | $12,355,200 | 1,040,000 | Put | Defined | 2026-05-15 | |
| 2026-03-31 | $1,242,648 | 104,600 | Call | Defined | 2026-05-15 | |
| 2025-12-31 | $7,111,986 | 438,200 | Call | Defined | 2026-02-17 | |
| 2025-12-31 | $8,834,280 | 544,318 | Shares | Defined | 2026-02-17 | |
| 2025-12-31 | $12,338,046 | 760,200 | Put | Defined | 2026-02-17 | |
| 2025-09-30 | $10,652,598 | 489,100 | Put | Defined | 2025-11-14 | |
| 2025-09-30 | $7,187,400 | 330,000 | Call | Defined | 2025-11-14 | |
| 2025-09-30 | $3,693,038 | 169,561 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $3,531,168 | 146,400 | Call | Defined | 2025-08-14 | |
| 2025-06-30 | $20,142,659 | 835,102 | Shares | Defined | 2025-08-14 | |
| 2025-06-30 | $15,313,788 | 634,900 | Put | Defined | 2025-08-14 | |
| 2025-03-31 | $4,155,522 | 364,200 | Put | Defined | 2025-05-15 | |
| 2025-03-31 | $2,536,443 | 222,300 | Call | Defined | 2025-05-15 | |
| 2025-03-31 | $6,765,319 | 592,929 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $5,560,856 | 349,300 | Call | Defined | 2025-02-14 | |
| 2024-12-31 | $4,939,004 | 310,239 | Shares | Defined | 2025-02-14 | |
| 2024-12-31 | $3,142,608 | 197,400 | Put | Defined | 2025-02-14 | |
| 2024-09-30 | $1,673,080 | 120,800 | Put | Defined | 2024-11-14 | |
| 2024-09-30 | $6,936,080 | 500,800 | Call | Defined | 2024-11-14 | |
| 2024-09-30 | $9,729,735 | 702,508 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $984,789 | 74,100 | Put | Defined | 2024-08-14 | |
| 2024-06-30 | $3,846,910 | 289,459 | Shares | Defined | 2024-08-14 | |
| 2024-06-30 | $3,512,547 | 264,300 | Call | Defined | 2024-08-14 | |
| 2024-03-31 | $1,742,575 | 162,100 | Call | Defined | 2024-05-15 | |
| 2024-03-31 | $451,500 | 42,000 | Put | Defined | 2024-05-15 | |
| 2024-03-31 | $4,480,234 | 416,766 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $414,696 | 44,400 | Put | Defined | 2024-02-14 | |
| 2023-12-31 | $2,547,952 | 272,800 | Call | Defined | 2024-02-14 | |
| 2023-12-31 | $3,553,486 | 380,459 | Shares | Defined | 2024-02-14 | |
| 2023-09-30 | $371,722 | 49,300 | Put | Defined | 2023-11-14 | |
| 2023-09-30 | $2,478,398 | 328,700 | Call | Defined | 2023-11-14 | |
| 2023-09-30 | $4,175,281 | 553,751 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $1,235,325 | 90,500 | Put | Defined | 2023-08-14 | |
| 2023-06-30 | $3,961,584 | 290,226 | Shares | Defined | 2023-08-14 | |
| 2023-06-30 | $6,199,830 | 454,200 | Call | Defined | 2023-08-14 | |
| 2023-03-31 | $2,304,814 | 248,900 | Call | Defined | 2023-05-15 | |
| 2023-03-31 | $8,008,612 | 864,861 | Shares | Defined | 2023-05-15 | |
| 2023-03-31 | $1,275,102 | 137,700 | Put | Defined | 2023-05-15 | |
| 2022-12-31 | $851,436 | 80,400 | Put | Defined | 2023-02-14 | |
| 2022-12-31 | $6,776,021 | 639,851 | Shares | Defined | 2023-02-14 | |
| 2022-12-31 | $3,657,786 | 345,400 | Call | Defined | 2023-02-14 | |
| 2022-09-30 | $385,659 | 58,700 | Put | Defined | 2022-11-14 | |
| 2022-09-30 | $1,296,261 | 197,300 | Call | Defined | 2022-11-14 | |
| 2022-09-30 | $5,676,669 | 864,029 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $13,074,920 | 1,472,401 | Shares | Defined | 2022-08-15 | |
| 2022-06-30 | $1,194,360 | 134,500 | Call | Defined | 2022-08-15 | |
| No filing history on record for this holder in this stock. | ||||||