Magnite, Inc.
US ˙ NasdaqGS ˙ US55955D1000

SecurityMGNI / Magnite, Inc.
InstitutionWolverine Trading, Llc
Latest Disclosed Ownership10,259 shares
Latest Disclosed Value $ 228,571
Wolverine Trading, Llc ownership in MGNI / Magnite, Inc.

On November 14, 2025 - Wolverine Trading, Llc filed a 13F-HR form disclosing ownership of 10,259 shares of Magnite, Inc. (US:MGNI) valued at $223,441 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 18, 2025 disclosing 14,275 shares of Magnite, Inc.. This represents a change in shares of -28.13% during the quarter. The current value of the position is $148,243 USD.

Wolverine Trading, Llc has a history of taking positions in derivatives of the underlying security (MGNI) in the form of stock options. The firm currently holds call options representing 192,100 of underlying shares valued at $4,279,988 USD and put options representing 52,200 of underlying shares valued at $1,163,016 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MGNI / Magnite, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2025-11-14 2025-09-30 13F MAGNITE COM 55955D100 10,259 -4,016 -28.13 229 -24.25 0.0002
2025-08-18 2025-06-30 13F MAGNITE COM 55955D100 14,275 -24,440 -63.13 301 -32.81 0.0003
2025-05-15 2025-03-31 13F MAGNITE COM 55955D100 38,715 -5,823 -13.07 449 -38.63 0.0005
2025-02-14 2024-12-31 13F MAGNITE COM 55955D100 44,538 13,934 45.53 731 74.22 0.0007
2024-11-14 2024-09-30 13F MAGNITE COM 55955D100 30,604 13,904 83.26 420 89.59 0.0004
2024-08-14 2024-06-30 13F MAGNITE COM 55955D100 16,700 16,700 222 0.0002
2023-02-14 2022-12-31 13F MAGNITE COM 55955D100 0 -13,593 -100.00 0 -100.00
2022-11-14 2022-09-30 13F MAGNITE COM 55955D100 13,593 13,593 90 0.0001
2022-08-15 2022-06-30 13F MAGNITE COM 55955D100 0 -40,806 -100.00 0 -100.00
2022-05-16 2022-03-31 13F MAGNITE COM 55955D100 40,806 29,865 272.96 570 190.82 0.0007
2022-02-14 2021-12-31 13F MAGNITE COM 55955D100 10,941 10,941 196 0.0002
2021-11-12 2021-09-30 13F MAGNITE COM 55955D100 0 -18,453 -100.00 0 -100.00
2021-08-06 2021-06-30 13F MAGNITE COM 55955D100 18,453 -31,098 -62.76 681 -66.20 0.0011
2021-05-14 2021-03-31 13F MAGNITE COM 55955D100 49,551 -62,469 -55.77 2,015 -42.53 0.0030
2021-02-12 2020-12-31 13F MAGNITE COM 55955D100 112,020 79,408 243.49 3,506 1,508.26 0.0055
2020-11-13 2020-09-30 13F MAGNITE COM 55955D100 32,612 32,612 218 0.0005
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-11-14 2025-09-30 13F MAGNITE COM Call 192,100 -5.46 4,280 -0.19 n/a n/a n/a
2025-08-18 2025-06-30 13F MAGNITE COM Call 203,200 140.19 4,288 337.45 n/a n/a n/a
2025-05-15 2025-03-31 13F MAGNITE COM Call 84,600 -57.89 981 -70.27 n/a n/a n/a
2025-02-14 2024-12-31 13F MAGNITE COM Call 200,900 -24.36 3,297 -9.55 n/a n/a n/a
2024-11-14 2024-09-30 13F MAGNITE COM Call 265,600 201.48 3,644 211.45 n/a n/a n/a
2024-08-14 2024-06-30 13F MAGNITE COM Call 88,100 1,171 n/a n/a n/a
2023-08-23 2023-06-30 13F MAGNITE COM Call 0 -100.00 0 n/a n/a n/a
2023-05-15 2023-03-31 13F MAGNITE COM Call 33,100 0 n/a n/a n/a
2023-02-14 2022-12-31 13F MAGNITE COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-14 2022-09-30 13F MAGNITE COM Call 144,500 954 n/a n/a n/a
2022-08-15 2022-06-30 13F MAGNITE COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-16 2022-03-31 13F MAGNITE COM Call 86,900 -56.16 1,215 -65.83 n/a n/a n/a
2022-02-14 2021-12-31 13F MAGNITE COM Call 198,200 131.81 3,556 50.23 n/a n/a n/a
2021-11-12 2021-09-30 13F MAGNITE COM Call 85,500 -73.99 2,367 -80.50 n/a n/a n/a
2021-08-06 2021-06-30 13F MAGNITE COM Call 328,700 -20.02 12,139 -27.36 n/a n/a n/a
2021-05-14 2021-03-31 13F MAGNITE COM Call 411,000 -1.77 16,711 27.60 n/a n/a n/a
2021-02-12 2020-12-31 13F MAGNITE COM Call 418,400 413.37 13,096 2,307.35 n/a n/a n/a
2020-11-13 2020-09-30 13F MAGNITE COM Call 81,500 544 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-11-14 2025-09-30 13F MAGNITE COM Put 52,200 -22.78 1,163 -18.44 n/a n/a n/a
2025-08-18 2025-06-30 13F MAGNITE COM Put 67,600 -1.31 1,426 79.60 n/a n/a n/a
2025-05-15 2025-03-31 13F MAGNITE COM Put 68,500 10.66 794 -21.77 n/a n/a n/a
2025-02-14 2024-12-31 13F MAGNITE COM Put 61,900 75.35 1,016 109.71 n/a n/a n/a
2024-11-14 2024-09-30 13F MAGNITE COM Put 35,300 35.25 484 39.88 n/a n/a n/a
2024-08-14 2024-06-30 13F MAGNITE COM Put 26,100 347 n/a n/a n/a
2023-08-23 2023-06-30 13F MAGNITE COM Put 0 -100.00 0 n/a n/a n/a
2023-05-15 2023-03-31 13F MAGNITE COM Put 16,200 0 n/a n/a n/a
2023-02-14 2022-12-31 13F MAGNITE COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-14 2022-09-30 13F MAGNITE COM Put 83,400 550 n/a n/a n/a
2022-08-15 2022-06-30 13F MAGNITE COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-16 2022-03-31 13F MAGNITE COM Put 156,600 -35.71 2,189 -49.91 n/a n/a n/a
2022-02-14 2021-12-31 13F MAGNITE COM Put 243,600 -12.09 4,370 -43.02 n/a n/a n/a
2021-11-12 2021-09-30 13F MAGNITE COM Put 277,100 -36.03 7,670 -52.06 n/a n/a n/a
2021-08-06 2021-06-30 13F MAGNITE COM Put 433,200 50.84 15,998 36.99 n/a n/a n/a
2021-05-14 2021-03-31 13F MAGNITE COM Put 287,200 24.33 11,678 61.52 n/a n/a n/a
2021-02-12 2020-12-31 13F MAGNITE COM Put 231,000 809.45 7,230 4,178.11 n/a n/a n/a
2020-11-13 2020-09-30 13F MAGNITE COM Put 25,400 169 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.