Filing Details

Accession Number:
0001280452-12-000234
Form Type:
4
Zero Holdings:
No
Publication Time:
2012-08-24 18:46:49
Reporting Period:
2012-08-23
Filing Date:
2012-08-24
Accepted Time:
2012-08-24 18:46:49
SEC Url:
Form 4 Filing
Issuer
Cik Name Symbol Sector (SIC) IRS No
1280452 Monolithic Power Systems Inc MPWR Semiconductors & Related Devices (3674) 770466789
Insiders
Cik Name Reported Address Insider Title Director Officer Large Shareholder Other
1192171 Herbert Wei Kuo Chang 79 Great Oaks Blvd
San Jose CA 95119
Yes No No No
Reported Non-Derivative Transactions
Sec. Name Acquisiton - Disposition Date Amount Price Remaning Holdings Equity Swap Involved Form Type Code Nature of Ownership Explanation
Common Stock Acquisiton 2012-08-23 3,000 $20.20 94,035 No 4 M Direct
Common Stock Disposition 2012-08-23 3,000 $22.27 91,035 No 4 S Direct
Common Stock Acquisiton 2012-08-24 8,500 $20.20 99,535 No 4 M Direct
Common Stock Disposition 2012-08-24 8,500 $22.36 91,035 No 4 S Direct
Equity Swap Involved Form Type Code Nature of Ownership Explanation
No 4 M Direct
No 4 S Direct
No 4 M Direct
No 4 S Direct
Reported Derivative Transactions
Sec. Name Sec. Type Acquisiton - Disposition Date Amount Price Amount - 2 Price - 2
Common Stock Non-Qualified Stock Option (right to buy) Disposition 2012-08-23 3,000 $0.00 3,000 $20.20
Common Stock Non-Qualified Stock Option (right to buy) Disposition 2012-08-24 8,500 $0.00 8,500 $20.20
Remaning Holdings Exercise Date Expiration Date Equity Swap Involved Transaction Form Type Transaction Code Nature of Ownership
22,000 2011-02-02 2017-02-09 No 4 M Direct
13,500 2011-02-02 2017-02-09 No 4 M Direct
Footnotes
  1. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $22.20 to $22.30. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
  2. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $22.20 to $22.60. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.