MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

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

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

Q4 2025
Shares 1,522,049 Value ($000) $197,958 Avg Close $143.19 Range $129.77 - $157.72
Q3 2025
Shares 1,419,250 Value ($000) $209,410 Avg Close $151.39 Range $135.34 - $172.55
Q2 2025
Shares 1,181,203 Value ($000) $198,702 Avg Close $159.72 Range $133.70 - $174.50
Q1 2025
Shares 671,479 Value ($000) $111,868 Avg Close $173.51 Range $159.29 - $194.88
Q4 2024
Shares 768,858 Value ($000) $127,092 Avg Close $157.91 Range $131.60 - $180.97
Q3 2024
Shares 1,394,056 Value ($000) $185,869 Avg Close $116.03 Range $101.61 - $135.78
Q2 2024
Shares 1,131,686 Value ($000) $142,525 Avg Close $131.69 Range $112.85 - $147.89
Q1 2024
Shares 686,100 Value ($000) $100,754 Avg Close $129.12 Range $107.57 - $153.93
Q4 2023
Shares 818,476 Value ($000) $95,934 Avg Close $93.21 Range $75.22 - $122.60
Q3 2023
Shares 603,681 Value ($000) $52,931 Avg Close $116.39 Range $83.03 - $164.16
Q2 2023
Shares 953,799 Value ($000) $156,948 Avg Close $174.09 Range $153.35 - $198.00
Q1 2021
Shares 207,846 Value ($000) $47,734 Avg Close $251.21 Range $217.65 - $284.86
Q4 2020
Shares 237,443 Value ($000) $63,725 Avg Close $249.38 Range $218.23 - $273.33
Q3 2020
Shares 290,543 Value ($000) $68,586 Avg Close $224.17 Range $203.81 - $248.88
Q2 2020
Shares 303,727 Value ($000) $69,247 Avg Close $219.47 Range $173.15 - $258.00
Q1 2020
Shares 433,277 Value ($000) $76,742 Avg Close $171.51 Range $143.90 - $187.85
Q4 2019
Shares 435,825 Value ($000) $68,886 Avg Close $150.33 Range $140.16 - $160.06
Q3 2019
Shares 221,445 Value ($000) $32,949 Avg Close $151.90 Range $139.36 - $160.25
Q2 2019
Shares 187,977 Value ($000) $27,975 Avg Close $137.22 Range $118.93 - $148.93
Q1 2019
Shares 195,947 Value ($000) $27,096 Avg Close $125.54 Range $101.87 - $139.48
Q4 2018
Shares 205,222 Value ($000) $22,035 Avg Close $111.51 Range $98.23 - $126.89
Q3 2018
Shares 233,137 Value ($000) $29,035 Avg Close $110.93 Range $96.14 - $124.74
Q2 2018
Shares 605,387 Value ($000) $59,116 Avg Close $95.08 Range $83.16 - $102.32
Q1 2018
Shares 652,958 Value ($000) $57,428 Avg Close $87.17 Range $80.69 - $96.45
Q4 2017
Shares 488,468 Value ($000) $41,422 Avg Close $86.74 Range $84.05 - $91.04
Q3 2017
Shares 225,979 Value ($000) $19,561 Avg Close $88.42 Range $81.01 - $100.00
Q2 2017
Shares 232,084 Value ($000) $21,161 Avg Close $91.81 Range $82.71 - $104.71
Q1 2017
Shares 402,920 Value ($000) $37,576 Avg Close $82.32 Range $66.79 - $96.68
Q4 2016
Shares 539,713 Value ($000) $36,377 Avg Close $61.46 Range $53.78 - $68.88
Q3 2016
Shares 575,453 Value ($000) $34,234 Avg Close $56.42 Range $51.10 - $60.52
Q2 2016
Shares 825,464 Value ($000) $43,349 Avg Close $47.10 Range $41.19 - $53.55
Q1 2016
Shares 828,904 Value ($000) $34,681 Avg Close $37.61 Range $33.03 - $41.93
Q4 2015
Shares 536,023 Value ($000) $22,250 Avg Close $40.86 Range $37.40 - $43.76
Q3 2015
Shares 647,517 Value ($000) $24,968 Avg Close $40.86 Range $35.33 - $46.00
Q2 2015
Shares 892,988 Value ($000) $34,594 Avg Close $35.83 Range $32.33 - $39.91
Q1 2015
Shares 1,294,952 Value ($000) $42,708 Avg Close $28.75 Range $25.12 - $33.16
Q4 2014
Shares 995,995 Value ($000) $26,235 Avg Close $24.68 Range $21.03 - $27.15
Q3 2014
Shares 1,007,740 Value ($000) $21,445 Avg Close $22.83 Range $19.30 - $24.75
Q2 2014
Shares 1,033,030 Value ($000) $24,380 Avg Close $24.80 Range $21.45 - $28.78
Q1 2014
Shares 1,380,343 Value ($000) $37,697 Avg Close $28.52 Range $25.08 - $32.20
Q4 2013
Shares 1,410,513 Value ($000) $41,229 Avg Close $27.99 Range $25.42 - $29.66
Q3 2013
Shares 1,481,358 Value ($000) $39,463 Avg Close $24.65 Range $21.21 - $27.17
Q2 2013
Shares 1,595,278 Value ($000) $33,819 Avg Close $21.04 Range $19.03 - $22.70