Silicon Motion Technology Corporation - Depositary Receipt (Common Stock)
US ˙ NasdaqGS ˙ US82706C1080

SecuritySIMO / Silicon Motion Technology Corporation - Depositary Receipt (Common Stock)
InstitutionBoothbay Fund Management, Llc
Latest Disclosed Ownership39,886 shares
Latest Disclosed Value $ 4,478,799
Boothbay Fund Management, Llc ownership in SIMO / Silicon Motion Technology Corporation - Depositary Receipt (Common Stock)

On May 15, 2026 - Boothbay Fund Management, Llc filed a 13F-HR form disclosing ownership of 39,886 shares of Silicon Motion Technology Corporation - Depositary Receipt (Common Stock) (US:SIMO) valued at $4,478,799 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 63,081 shares of Silicon Motion Technology Corporation - Depositary Receipt (Common Stock). This represents a change in shares of -36.77% during the quarter. The current value of the position is $10,318,508 USD.

Boothbay Fund Management, Llc has a history of taking positions in derivatives of the underlying security (SIMO) in the form of stock options. The firm currently holds call options representing 17,900 of underlying shares valued at $2,009,991 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.

SIMO / Silicon Motion Technology Corporation - Depositary Receipt (Common Stock) 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)
2026-05-15 2026-03-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 39,886 -23,195 -36.77 4,479 -23.41 0.0580
2026-02-17 2025-12-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 63,081 14,482 29.80 5,848 26.92 0.0872
2025-11-14 2025-09-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 48,599 -7,386 -13.19 4,608 9.48 0.0670
2025-08-14 2025-06-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 55,985 55,985 4,208 0.0818
2025-05-15 2025-03-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 0 -19,987 -100.00 0 -100.00
2025-02-14 2024-12-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 19,987 -46,347 -69.87 1,080 -73.19 0.0266
2024-11-14 2024-09-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 66,334 -12,304 -15.65 4,029 -36.73 0.0916
2024-08-14 2024-06-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 78,638 13,432 20.60 6,369 26.95 0.1508
2024-05-15 2024-03-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 65,206 31,618 94.13 5,017 143.85 0.0966
2024-02-14 2023-12-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 33,588 15,100 81.67 2,058 117.21 0.0525
2023-11-14 2023-09-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 18,488 -33,053 -64.13 948 -74.43 0.0225
2023-08-14 2023-06-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 51,541 -64,187 -55.46 3,704 -51.16 0.0812
2023-05-15 2023-03-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 115,728 3,797 3.39 7,582 4.23 0.1555
2023-02-14 2022-12-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 111,931 66,405 145.86 7,274 145.08 0.1683
2022-11-14 2022-09-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 45,526 35,526 355.26 2,968 254.60 0.0741
2022-08-15 2022-06-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 10,000 10,000 837 0.0220
2022-02-14 2021-12-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 0 -29,169 -100.00 0 -100.00
2021-11-15 2021-09-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 29,169 16,814 136.09 2,012 154.04 0.0557
2021-08-17 2021-06-30 13F/A-1 SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 12,355 -25,026 -66.95 792 -64.32 0.0254
2021-08-16 2021-06-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 12,355 -25,026 792 0.0249
2021-05-17 2021-03-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 37,381 37,381 2,220 0.0832
2020-08-14 2020-06-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 0 -93,112 -100.00 0 -100.00
2020-05-15 2020-03-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 93,112 88,361 1,859.84 3,413 1,316.18 0.2828
2020-02-14 2019-12-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 4,751 4,751 241 0.0210
2018-11-14 2018-09-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 0 -9,398 -100.00 0 -100.00
2018-08-14 2018-06-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 9,398 9,398 497 0.0433
2018-05-14 2018-03-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 0 -14,607 -100.00 0 -100.00
2018-02-14 2017-12-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 14,607 9,378 179.35 774 208.37 0.1132
2017-11-14 2017-09-30 13F SILICON MOTION TECHNOLOGY SPONSORED ADR 82706C108 5,229 5,229 251 0.0417
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
(%)
2026-05-15 2026-03-31 13F SILICON MOTION TECHNOLOGY SPONSORED ADR Call 17,900 2,010 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.