Michael HsingFiled
CEOExecutiveDirectorCIK 1308676
- MPWRMONOLITHIC POWER SYSTEMS, INC.CEOfiled Sep 30, 2026
Net · 12 months
-$354.8M
Open-market buys − sales
Sold · 12 months
$354.8M
$40.3M in 90d · 233 sales on record
Bought · 12 months
$0
$0 in 90d · 0 buys on record
Under 10b5-1
44%
Share of sale value under a trading plan
Last trade
Sep 28, 2026
Filed Sep 30, 2026 · 237 rows
Monthly open-market value · 24 months Filed
- Bought (open market)
- Sold (open market)
Unusual activity Estimated
Whale score 99Whale watch
- 32Exec salePublic Sep 30, 2026 · traded Sep 28, 2026
MPWR CEO Michael Hsing sold $14.8M (10b5-1 plan)
Details
- Insider
- Michael Hsing
- Company
- MONOLITHIC POWER SYSTEMS, INC.
- Ticker
- MPWR
- Tx kind
- open_market_sale
- Traded
- Sep 28, 2026
- Shares
- 10,967
- Price
- $1,351
- Value
- $14.8M
- Is 10b5 1
- Yes
- Filed
- Sep 30, 2026
- Public from
- Sep 30, 2026
- Method version
- 2026-11-03
- 28Exec salePublic Sep 30, 2026 · traded Sep 28, 2026
MPWR CEO Michael Hsing sold $8.5M (10b5-1 plan)
Details
- Insider
- Michael Hsing
- Company
- MONOLITHIC POWER SYSTEMS, INC.
- Ticker
- MPWR
- Tx kind
- open_market_sale
- Traded
- Sep 28, 2026
- Shares
- 6,343
- Price
- $1,347
- Value
- $8.5M
- Is 10b5 1
- Yes
- Filed
- Sep 30, 2026
- Public from
- Sep 30, 2026
- Method version
- 2026-11-03
- 28Exec salePublic Sep 30, 2026 · traded Sep 28, 2026
MPWR CEO Michael Hsing sold $7.8M (10b5-1 plan)
Details
- Insider
- Michael Hsing
- Company
- MONOLITHIC POWER SYSTEMS, INC.
- Ticker
- MPWR
- Tx kind
- open_market_sale
- Traded
- Sep 28, 2026
- Shares
- 5,783
- Price
- $1,344
- Value
- $7.8M
- Is 10b5 1
- Yes
- Filed
- Sep 30, 2026
- Public from
- Sep 30, 2026
- Method version
- 2026-11-03
- 65Insider overlapPublic Jun 9, 2026 · traded May 22, 2026
Rep. Ro Khanna bought MPWR 4 days after its CEO sold $9.9M
Details
- Politician
- Ro Khanna
- Ticker
- MPWR
- Asset
- MONOLITHIC POWER SYSTEMS, INc.
- Tx type
- buy
- Traded
- May 22, 2026
- Filed
- Jun 9, 2026
- Amount low
- $15,001
- Amount high
- $50,000
- Range midpoint (estimate)
- $32,501
- Disclosed range
- $15,001 - $50,000
- Reporting lag days
- 18
- Owner type
- self
- Is whale
- No
- Insider trade
- {"insider":{"slug":"michael-hsing","name":"Michael Hsing","title":"CEO","short_title":"CEO"},"company":"MONOLITHIC POWER SYSTEMS, INC.","ticker":"MPWR","tx_kind":"open_market_sale","tx_date":"2026-05-18","shares":6688,"price":1486.76,"value":9943450.88,"is_10b5_1":false,"filing_date":"2026-05-20"}
- Days between
- 4
- Opposite side
- Yes
- Public from
- Jun 9, 2026
- Method version
- 2026-11-03
- 44Exec salePublic May 20, 2026 · traded May 18, 2026
MPWR CEO Michael Hsing sold $9.9M
Details
- Insider
- Michael Hsing
- Company
- MONOLITHIC POWER SYSTEMS, INC.
- Ticker
- MPWR
- Tx kind
- open_market_sale
- Traded
- May 18, 2026
- Shares
- 6,688
- Price
- $1,487
- Value
- $9.9M
- Is 10b5 1
- No
- Filed
- May 20, 2026
- Public from
- May 20, 2026
- Method version
- 2026-11-03
- 43Exec salePublic May 20, 2026 · traded May 18, 2026
MPWR CEO Michael Hsing sold $8.5M
Details
- Insider
- Michael Hsing
- Company
- MONOLITHIC POWER SYSTEMS, INC.
- Ticker
- MPWR
- Tx kind
- open_market_sale
- Traded
- May 18, 2026
- Shares
- 5,819
- Price
- $1,468
- Value
- $8.5M
- Is 10b5 1
- No
- Filed
- May 20, 2026
- Public from
- May 20, 2026
- Method version
- 2026-11-03
- 43Exec salePublic May 20, 2026 · traded May 18, 2026
MPWR CEO Michael Hsing sold $8.5M
Details
- Insider
- Michael Hsing
- Company
- MONOLITHIC POWER SYSTEMS, INC.
- Ticker
- MPWR
- Tx kind
- open_market_sale
- Traded
- May 18, 2026
- Shares
- 5,737
- Price
- $1,483
- Value
- $8.5M
- Is 10b5 1
- No
- Filed
- May 20, 2026
- Public from
- May 20, 2026
- Method version
- 2026-11-03
- 43Exec salePublic May 20, 2026 · traded May 18, 2026
MPWR CEO Michael Hsing sold $7.4M
Details
- Insider
- Michael Hsing
- Company
- MONOLITHIC POWER SYSTEMS, INC.
- Ticker
- MPWR
- Tx kind
- open_market_sale
- Traded
- May 18, 2026
- Shares
- 5,049
- Price
- $1,473
- Value
- $7.4M
- Is 10b5 1
- No
- Filed
- May 20, 2026
- Public from
- May 20, 2026
- Method version
- 2026-11-03
- 41Exec salePublic May 20, 2026 · traded May 18, 2026
MPWR CEO Michael Hsing sold $6M
Details
- Insider
- Michael Hsing
- Company
- MONOLITHIC POWER SYSTEMS, INC.
- Ticker
- MPWR
- Tx kind
- open_market_sale
- Traded
- May 18, 2026
- Shares
- 4,082
- Price
- $1,477
- Value
- $6M
- Is 10b5 1
- No
- Filed
- May 20, 2026
- Public from
- May 20, 2026
- Method version
- 2026-11-03
- 41Exec salePublic May 20, 2026 · traded May 18, 2026
MPWR CEO Michael Hsing sold $5.7M
Details
- Insider
- Michael Hsing
- Company
- MONOLITHIC POWER SYSTEMS, INC.
- Ticker
- MPWR
- Tx kind
- open_market_sale
- Traded
- May 18, 2026
- Shares
- 3,769
- Price
- $1,508
- Value
- $5.7M
- Is 10b5 1
- No
- Filed
- May 20, 2026
- Public from
- May 20, 2026
- Method version
- 2026-11-03
Transactions
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