MONOLITHIC PWR SYS INC

Ticker: MPWR CUSIP: 609839105 Class: COM

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

Note: Option positions (PUT/CALL) are excluded.

Q4 2022
Shares 119,526 Value ($000) $42,266 Avg Close $350.38 Range $294.21 - $405.83
Q4 2018
Shares 195,754 Value ($000) $22,756 Avg Close $112.91 Range $96.22 - $130.06
Q2 2018
Shares 115,690 Value ($000) $15,464 Avg Close $119.62 Range $102.58 - $133.88
Q1 2018
Shares 106,434 Value ($000) $12,322 Avg Close $111.03 Range $96.61 - $119.53
Q4 2017
Shares 169,342 Value ($000) $19,027 Avg Close $108.54 Range $98.18 - $118.56
Q3 2017
Shares 261,212 Value ($000) $27,832 Avg Close $94.77 Range $87.95 - $100.67
Q2 2017
Shares 259,887 Value ($000) $25,053 Avg Close $88.76 Range $82.13 - $96.78
Q1 2017
Shares 292,031 Value ($000) $26,896 Avg Close $82.35 Range $76.05 - $87.81
Q4 2016
Shares 355,277 Value ($000) $29,108 Avg Close $74.44 Range $69.57 - $81.67
Q3 2016
Shares 631,445 Value ($000) $50,831 Avg Close $68.33 Range $60.21 - $75.04
Q2 2016
Shares 701,438 Value ($000) $47,922 Avg Close $60.38 Range $55.33 - $65.50
Q1 2016
Shares 338,617 Value ($000) $21,550 Avg Close $54.76 Range $50.58 - $59.11
Q4 2015
Shares 403,447 Value ($000) $25,704 Avg Close $56.88 Range $45.12 - $63.43
Q3 2015
Shares 528,292 Value ($000) $27,049 Avg Close $45.23 Range $37.18 - $48.10
Q2 2015
Shares 547,802 Value ($000) $27,779 Avg Close $48.11 Range $44.76 - $50.50
Q1 2015
Shares 528,925 Value ($000) $27,848 Avg Close $45.64 Range $40.76 - $50.87
Q4 2014
Shares 251,761 Value ($000) $12,523 Avg Close $40.54 Range $30.68 - $45.83
Q2 2013
Shares 297,420 Value ($000) $7,170 Avg Close $21.28 Range $18.50 - $22.86