Ferroglobe PLC
US ˙ NasdaqCM ˙ GB00BYW6GV68

SecurityGSM / Ferroglobe PLC
InstitutionWolverine Trading, Llc
Latest Disclosed Ownership67,867 shares
Latest Disclosed Value $ 295,221
Wolverine Trading, Llc ownership in GSM / Ferroglobe PLC

On November 14, 2025 - Wolverine Trading, Llc filed a 13F-HR form disclosing ownership of 67,867 shares of Ferroglobe PLC (US:GSM) valued at $308,795 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 18, 2025 disclosing 134,247 shares of Ferroglobe PLC. This represents a change in shares of -49.45% during the quarter. The current value of the position is $293,185 USD.

Wolverine Trading, Llc has a history of taking positions in derivatives of the underlying security (GSM) in the form of stock options. The firm currently holds call options representing 17,300 of underlying shares valued at $75,255 USD and put options representing 201,100 of underlying shares valued at $874,785 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.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

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.

GSM / Ferroglobe PLC 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 FERROGLOBE SHS G33856108 67,867 -66,380 -49.45 295 -39.92 0.0002
2025-08-18 2025-06-30 13F FERROGLOBE SHS G33856108 134,247 85,479 175.28 491 177.40 0.0005
2025-05-15 2025-03-31 13F FERROGLOBE SHS G33856108 48,768 -48,742 -49.99 178 -51.90 0.0002
2025-02-14 2024-12-31 13F FERROGLOBE SHS G33856108 97,510 97,510 369 0.0003
2024-08-14 2024-06-30 13F FERROGLOBE SHS G33856108 0 -35,480 -100.00 0 -100.00
2024-05-15 2024-03-31 13F FERROGLOBE SHS G33856108 35,480 23,761 202.76 177 131.58 0.0002
2024-02-14 2023-12-31 13F FERROGLOBE SHS G33856108 11,719 11,719 76 0.0001
2023-11-15 2023-09-30 13F FERROGLOBE SHS G33856108 0 -19,431 -100.00 0 -100.00
2023-08-23 2023-06-30 13F FERROGLOBE SHS G33856108 19,431 19,431 94 0.0001
2023-05-15 2023-03-31 13F FERROGLOBE SHS G33856108 0 -34,720 -100.00 0 -100.00
2023-02-14 2022-12-31 13F FERROGLOBE SHS G33856108 34,720 10,655 44.28 134 5.51 0.0002
2022-11-14 2022-09-30 13F FERROGLOBE SHS G33856108 24,065 12,083 100.84 127 76.39 0.0002
2022-08-15 2022-06-30 13F FERROGLOBE SHS G33856108 11,982 11,982 72 0.0001
2022-02-14 2021-12-31 13F FERROGLOBE SHS G33856108 0 -18,021 -100.00 0 -100.00
2021-11-12 2021-09-30 13F FERROGLOBE SHS G33856108 18,021 -9,794 -35.21 147 -13.02 0.0002
2021-08-06 2021-06-30 13F FERROGLOBE SHS G33856108 27,815 15,873 132.92 169 275.56 0.0003
2021-05-14 2021-03-31 13F FERROGLOBE SHS G33856108 11,942 1,378 13.04 45 164.71 0.0001
2021-02-12 2020-12-31 13F FERROGLOBE SHS G33856108 10,564 10,564 -11.54 17 -62.22 0.0000
2019-11-14 2019-09-30 13F FERROGLOBE SHS G33856108 0 -11,999 -100.00 0 -100.00
2019-08-20 2019-06-30 13F FERROGLOBE SHS G33856108 11,999 11,999 20 0.0001
2019-02-13 2018-12-31 13F FERROGLOBE SHS G33856108 0 -36,140 -100.00 0 -100.00
2018-11-14 2018-09-30 13F FERROGLOBE SHS G33856108 36,140 11,092 44.28 295 9.67 0.0006
2018-08-13 2018-06-30 13F FERROGLOBE SHS G33856108 25,048 0 0.00 269 0.00 0.0006
2018-05-15 2018-03-31 13F FERROGLOBE SHS G33856108 25,048 25,048 0.00 269 0.00 0.0006
2016-11-14 2016-09-30 13F FERROGLOBE SHS G33856108 0 -246 -100.00 0 -100.00
2016-08-15 2016-06-30 13F FERROGLOBE SHS G33856108 246 246 2 0.0000
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 FERROGLOBE SHS Call 17,300 75 n/a n/a n/a
2025-05-15 2025-03-31 13F FERROGLOBE SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-14 2024-12-31 13F FERROGLOBE SHS Call 29,600 112 n/a n/a n/a
2024-08-14 2024-06-30 13F FERROGLOBE SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F FERROGLOBE SHS Call 25,000 30.21 124 0.00 n/a n/a n/a
2024-02-14 2023-12-31 13F FERROGLOBE SHS Call 19,200 30.61 125 63.16 n/a n/a n/a
2023-11-15 2023-09-30 13F FERROGLOBE SHS Call 14,700 -19.23 76 -13.64 n/a n/a n/a
2023-08-23 2023-06-30 13F FERROGLOBE SHS Call 18,200 6.43 88 n/a n/a n/a
2023-05-15 2023-03-31 13F FERROGLOBE SHS Call 17,100 11.76 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F FERROGLOBE SHS Call 15,300 59 n/a n/a n/a
2022-11-14 2022-09-30 13F FERROGLOBE SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-15 2022-06-30 13F FERROGLOBE SHS Call 10,100 60 n/a n/a n/a
2022-05-16 2022-03-31 13F FERROGLOBE SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F FERROGLOBE SHS Call 90,500 7.23 558 -19.01 n/a n/a n/a
2021-11-12 2021-09-30 13F FERROGLOBE SHS Call 84,400 99.53 689 168.09 n/a n/a n/a
2021-08-06 2021-06-30 13F FERROGLOBE SHS Call 42,300 1.68 257 62.66 n/a n/a n/a
2021-05-14 2021-03-31 13F FERROGLOBE SHS Call 41,600 156.79 158 507.69 n/a n/a n/a
2021-02-12 2020-12-31 13F FERROGLOBE SHS Call 16,200 -61.06 26 -83.54 n/a n/a n/a
2016-11-14 2016-09-30 13F FERROGLOBE SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-08-15 2016-06-30 13F FERROGLOBE SHS Call 46 39 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 FERROGLOBE SHS Put 201,100 -7.79 875 9.52 n/a n/a n/a
2025-08-18 2025-06-30 13F FERROGLOBE SHS Put 218,100 215.17 798 217.93 n/a n/a n/a
2025-05-15 2025-03-31 13F FERROGLOBE SHS Put 69,200 -58.66 252 -60.28 n/a n/a n/a
2025-02-14 2024-12-31 13F FERROGLOBE SHS Put 167,400 633 n/a n/a n/a
2024-08-14 2024-06-30 13F FERROGLOBE SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F FERROGLOBE SHS Put 98,800 372.73 492 261.76 n/a n/a n/a
2024-02-14 2023-12-31 13F FERROGLOBE SHS Put 20,900 -14.69 136 7.09 n/a n/a n/a
2023-11-15 2023-09-30 13F FERROGLOBE SHS Put 24,500 -25.98 127 -20.62 n/a n/a n/a
2023-08-23 2023-06-30 13F FERROGLOBE SHS Put 33,100 161 n/a n/a n/a
2023-05-15 2023-03-31 13F FERROGLOBE SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F FERROGLOBE SHS Put 31,200 -6.02 120 -31.43 n/a n/a n/a
2022-11-14 2022-09-30 13F FERROGLOBE SHS Put 33,200 -4.60 175 -15.87 n/a n/a n/a
2022-08-15 2022-06-30 13F FERROGLOBE SHS Put 34,800 208 n/a n/a n/a
2022-05-16 2022-03-31 13F FERROGLOBE SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F FERROGLOBE SHS Put 11,800 -92.25 73 -94.13 n/a n/a n/a
2021-11-12 2021-09-30 13F FERROGLOBE SHS Put 152,300 32.20 1,243 77.57 n/a n/a n/a
2021-08-06 2021-06-30 13F FERROGLOBE SHS Put 115,200 242.86 700 451.18 n/a n/a n/a
2021-05-14 2021-03-31 13F FERROGLOBE SHS Put 33,600 -70.83 127 -81.86 n/a n/a n/a
2019-11-14 2019-09-30 13F FERROGLOBE SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-08-20 2019-06-30 13F FERROGLOBE SHS Put 14,200 9.23 24 -11.11 n/a n/a n/a
2019-05-15 2019-03-31 13F FERROGLOBE SHS Put 13,000 -8.45 27 12.50 n/a n/a n/a
2019-02-13 2018-12-31 13F FERROGLOBE SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-11-14 2018-09-30 13F FERROGLOBE SHS Put 45,500 117.70 372 66.07 n/a n/a n/a
2018-08-13 2018-06-30 13F FERROGLOBE SHS Put 20,900 0.00 224 0.00 n/a n/a n/a
2018-05-15 2018-03-31 13F FERROGLOBE SHS Put 20,900 0.00 224 0.00 n/a n/a n/a
2016-11-14 2016-09-30 13F FERROGLOBE SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2016-08-15 2016-06-30 13F FERROGLOBE SHS Put 25 21 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.