Twin Disc, Incorporated
US ˙ NasdaqGS ˙ US9014761012

SecurityTWIN / Twin Disc, Incorporated
InstitutionSei Investments Co
Latest Disclosed Ownership36,552 shares
Latest Disclosed Value $ 609,669
Sei Investments Co ownership in TWIN / Twin Disc, Incorporated

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 36,552 shares of Twin Disc, Incorporated (US:TWIN) valued at $609,687 USD as of December 31, 2025. The entity filed a previous 13F-HR on August 14, 2019 disclosing 0 shares of Twin Disc, Incorporated. The current value of the position is $658,302 USD.

Sei Investments Co has a history of taking positions in derivatives of the underlying security (TWIN) in the form of stock options.

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.

TWIN / Twin Disc, Incorporated 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)
2026-02-13 2025-12-31 13F TWIN DISC COM 901476101 36,552 36,552 610
2019-08-14 2019-06-30 13F TWIN DISC COM 901476101 0 -2,295 -100.00 0 -100.00
2019-05-15 2019-03-31 13F TWIN DISC COM 901476101 2,295 29 1.28 31 24.00 0.0001
2019-02-13 2018-12-31 13F TWIN DISC COM 901476101 2,266 244 12.07 25 -44.44 0.0001
2018-11-08 2018-09-30 13F TWIN DISC COM 901476101 2,022 -765 -27.45 45 -34.78 0.0002
2018-08-03 2018-06-30 13F TWIN DISC COM 901476101 2,787 237 9.29 69 25.45 0.0002
2018-05-11 2018-03-31 13F TWIN DISC COM 901476101 2,550 83 3.36 55 -16.67 0.0002
2018-02-08 2017-12-31 13F TWIN DISC COM 901476101 2,467 73 3.05 66 46.67 0.0002
2017-11-06 2017-09-30 13F TWIN DISC COM 901476101 2,394 353 17.30 45 36.36 0.0002
2017-07-31 2017-06-30 13F TWIN DISC COM 901476101 2,041 -199 -8.88 33 -28.26 0.0001
2017-05-05 2017-03-31 13F TWIN DISC COM 901476101 2,240 75 3.46 46 43.75 0.0002
2017-02-02 2016-12-31 13F TWIN DISC COM 901476101 2,165 -232 -9.68 32 10.34 0.0002
2016-11-04 2016-09-30 13F TWIN DISC COM 901476101 2,397 145 6.44 29 20.83 0.0001
2016-08-11 2016-06-30 13F TWIN DISC COM 901476101 2,252 380 20.30 24 26.32 0.0001
2016-05-10 2016-03-31 13F/A-1 TWIN DISC COM 901476101 1,872 716 61.94 19 58.33 0.0001
2016-02-03 2015-12-31 13F TWIN DISC COM 901476101 1,156 1,058 1,079.59 12 1,100.00 0.0001
2015-11-02 2015-09-30 13F/A-1 TWIN DISC COM 901476101 98 -153 -60.96 1 -80.00 0.0000
2015-10-30 2015-09-30 13F TWIN DISC COM 901476101 98 2
2015-08-07 2015-06-30 13F/A-1 TWIN DISC COM 901476101 251 -23 -8.39 5 0.00 0.0000
2015-08-04 2015-06-30 13F TWIN DISC COM 901476101 251 251 5 0.0000
2015-05-14 2015-03-31 13F/A-1 TWIN DISC COM 901476101 274 251 1,091.30 5 0.0000
2015-05-01 2015-03-31 13F 21VIANET GROUP PUT 901476101 274 274 5 0.0000
2015-02-10 2014-12-31 13F TWIN DISC COM 901476101 23 23 0 0.0000
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
(%)
2015-05-01 2015-03-31 13F 21VIANET GROUP PUT 274 5 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.