Monolithic Power Systems, Inc.
MX ˙ BMV ˙ US6098391054
SecurityMX:MPWR / Monolithic Power Systems, Inc.
InstitutionHsbc Holdings Plc
Latest Disclosed Ownership158,873 shares
Latest Disclosed Value $ 173,508,324
Hsbc Holdings Plc ownership in MPWR / Monolithic Power Systems, Inc.

On April 30, 2026 - Hsbc Holdings Plc filed a 13F-HR form disclosing ownership of 158,873 shares of Monolithic Power Systems, Inc. (MX:MPWR) valued at $173,508,324 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 20, 2026 disclosing 200,626 shares of Monolithic Power Systems, Inc.. This represents a change in shares of -20.81% during the quarter.

Hsbc Holdings Plc has a history of taking positions in derivatives of the underlying security (MPWR) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 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.

MX:MPWR / Monolithic Power Systems, 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)
2026-04-30 2026-03-31 13F MONOLITHIC PWR SYS COM 609839105 158,873 -41,753 -20.81 173,508 -4.83 0.0906
2026-03-20 2025-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 200,626 62,714 45.47 182,310 44.29 0.0929
2026-03-06 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 200,626 62,714 182,310 0.1036
2025-11-13 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 137,912 -4,654 -3.26 126,347 21.06 0.0697
2025-08-13 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 142,566 -16,256 -10.24 104,369 13.85 0.0627
2025-05-14 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 158,822 -15,946 -9.12 91,670 -11.65 0.0567
2025-02-14 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 174,768 40,888 30.54 103,752 -16.08 0.0603
2024-11-14 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 133,880 -189 -0.14 123,627 12.36 0.0720
2024-08-12 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 134,069 29,775 28.55 110,028 55.84 0.0673
2024-05-15 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 104,294 16,632 18.97 70,604 27.63 0.0478
2024-02-12 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 87,662 12,763 17.04 55,319 59.94 0.0482
2023-11-13 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 74,899 -19,006 -20.24 34,586 -32.18 0.0360
2023-08-11 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 93,905 30,444 47.97 50,994 60.60 0.0519
2023-05-15 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 63,461 -17,230 -21.35 31,752 11.69 0.0380
2023-02-14 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 80,691 4,229 5.53 28,429 1.98 0.0327
2022-11-14 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 76,462 1,576 2.10 27,875 -3.79 0.0455
2022-08-11 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 74,886 1,918 2.63 28,973 -18.35 0.0405
2022-05-16 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 72,968 -6,251 -7.89 35,486 -9.19 0.0431
2022-02-11 2021-12-31 13F MONOLITHIC PWR SYS COM 609839105 79,219 15,598 24.52 39,077 26.47 0.0361
2021-11-12 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 63,621 4,753 8.07 30,899 40.12 0.0311
2021-08-13 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 58,868 12,073 25.80 22,052 34.55 0.0235
2021-05-14 2021-03-31 13F MONOLITHIC PWR SYS COM 609839105 46,795 27,547 143.12 16,389 135.68 0.0193
2021-02-25 2020-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 19,248 865 4.71 6,954 35.34 0.0093
2021-02-12 2020-12-31 13F MONOLITHIC PWR SYS COM 609839105 19,248 865 6,954 1,651.1352
2020-11-12 2020-09-30 13F MONOLITHIC PWR SYS COM 609839105 18,383 5,583 43.62 5,138 69.35 0.0082
2020-08-14 2020-06-30 13F MONOLITHIC PWR SYS COM 609839105 12,800 -1,886 -12.84 3,034 23.33 0.0058
2020-05-15 2020-03-31 13F MONOLITHIC PWR SYS COM 609839105 14,686 7,205 96.31 2,460 84.27 0.0057
2020-02-14 2019-12-31 13F MONOLITHIC PWR SYS COM 609839105 7,481 -4,929 -39.72 1,335 -30.90 0.0023
2019-11-14 2019-09-30 13F MONOLITHIC PWR SYS COM 609839105 12,410 -7,144 -36.53 1,932 -27.20 0.0036
2019-08-13 2019-06-30 13F MONOLITHIC PWR SYS COM 609839105 19,554 9,723 98.90 2,654 99.40 0.0050
2019-05-15 2019-03-31 13F MONOLITHIC PWR SYS COM 609839105 9,831 2,438 32.98 1,331 55.31 0.0024
2019-02-13 2018-12-31 13F MONOLITHIC PWR SYS COM 609839105 7,393 5,294 252.22 857 225.86 0.0016
2018-11-13 2018-09-30 13F MONOLITHIC PWR SYS COM 609839105 2,099 2,099 263 0.0004
2018-08-10 2018-06-30 13F MONOLITHIC PWR SYS COM 609839105 0 -2,407 -100.00 0 -100.00
2018-05-11 2018-03-31 13F MONOLITHIC PWR SYS COM 609839105 2,407 -132 -5.20 278 -2.46 0.0004
2018-02-14 2017-12-31 13F MONOLITHIC PWR SYS COM 609839105 2,539 481 23.37 285 30.14 0.0004
2017-11-14 2017-09-30 13F MONOLITHIC PWR SYS COM 609839105 2,058 2,058 219 0.0004
2017-08-14 2017-06-30 13F MONOLITHIC PWR SYS COM 609839105 0 -2,336 -100.00 0 -100.00
2017-05-15 2017-03-31 13F MONOLITHIC PWR SYS COM 609839105 2,336 -5,811 -71.33 216 -67.66 0.0005
2017-02-09 2016-12-31 13F MONOLITHIC PWR SYS COM 609839105 8,147 8,147 668 0.0016
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
(%)
2026-03-20 2025-12-31 13F/A MONOLITHIC PWR SYS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-03-06 2025-12-31 13F MONOLITHIC PWR SYS COM Call 0 0 n/a n/a n/a
2025-11-13 2025-09-30 13F MONOLITHIC PWR SYS COM Call 2,300 0.00 2,117 25.94 n/a n/a n/a
2025-08-13 2025-06-30 13F MONOLITHIC PWR SYS COM Call 2,300 0.00 1,682 26.11 n/a n/a n/a
2025-05-14 2025-03-31 13F MONOLITHIC PWR SYS COM Call 2,300 1,334 n/a n/a n/a
2025-02-14 2024-12-31 13F MONOLITHIC PWR SYS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-14 2024-09-30 13F MONOLITHIC PWR SYS COM Call 700 -53.33 647 -46.79 n/a n/a n/a
2024-08-12 2024-06-30 13F MONOLITHIC PWR SYS COM Call 1,500 0.00 1,216 19.69 n/a n/a n/a
2024-05-15 2024-03-31 13F MONOLITHIC PWR SYS COM Call 1,500 1,016 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
(%)
2024-08-12 2024-06-30 13F MONOLITHIC PWR SYS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F MONOLITHIC PWR SYS COM Put 500 339 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.