William Blair & Company
MASI

William Blair & Company’s Masimo MASI Stock Holding History

William Blair & Company’s Portfolio MASI Stock Details MASI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2023
Q3 		– Sell
-2,419
Closed -$398K – 1821
2023
Q2 		$398K Sell
2,419
-227
-9% -$39.5K ﹤0.01% 1131
2023
Q1 		$488K Buy
+2,646
New +$446K ﹤0.01% 1057
2021
Q3 		– Sell
-1,845
Closed -$447K – 1916
2021
Q2 		$447K Sell
1,845
-713
-28% -$163K ﹤0.01% 1188
2021
Q1 		$587K Sell
2,558
-133
-5% -$33.4K ﹤0.01% 1068
2020
Q4 		$722K Sell
2,691
-55
-2% -$13.7K ﹤0.01% 972
2020
Q3 		$648K Buy
2,746
+486
+22% +$109K ﹤0.01% 899
2020
Q2 		$515K Sell
2,260
-1,017
-31% -$223K ﹤0.01% 932
2020
Q1 		$580K Buy
+3,277
New +$562K ﹤0.01% 827
2015
Q2 		– Sell
-38,375
Closed -$1.26M – 2221
2015
Q1 		$1.26M Sell
38,375
-5,650
-13% -$162K ﹤0.01% 1480
2014
Q4 		$1.16M Sell
44,025
-900
-2% -$22.2K ﹤0.01% 1453
2014
Q3 		$956K Sell
44,925
-25
-0.1% -$571 ﹤0.01% 1491
2014
Q2 		$1.06M Sell
44,950
-18,330
-29% -$455K ﹤0.01% 1437
2014
Q1 		$1.73M Sell
63,280
-525
-0.8% -$15K ﹤0.01% 1245
2013
Q4 		$1.86M Sell
63,805
-1,000
-2% -$28K ﹤0.01% 1197
2013
Q3 		$1.73M Sell
64,805
-25
-0% -$616 ﹤0.01% 1178
2013
Q2 		$1.37M Buy
+64,830
New +$1.36M ﹤0.01% 1170

Other funds holding MASI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
PCM
Politan Capital Management New York $985M AUM 3.12% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return
RI
RTW Investments New York $10B AUM 135.35% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
EC
Eminence Capital New York $4.36B AUM 3.1% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

William Blair & Company's MASI Position: Q3 2023 in Review

William Blair & Company sold out of Masimo (MASI) in Q3 2023, closing a stake of 2,419 shares — an estimated $398K sold.

William Blair & Company first reported a position in MASI in Q2 2013 and held it in 16 quarters. The position peaked at $1.86M in Q4 2013. 356 funds tracked by Wall St. Rank hold MASI as of Q3 2023.

  • William Blair & Company reported no remaining Masimo position as of Q3 2023 after selling out during the quarter.
  • William Blair & Company sold 2,419 Masimo shares in Q3 2023, an estimated $398K.
  • William Blair & Company first reported a position in Masimo in Q2 2013 and held it in 16 quarters.
  • William Blair & Company's Masimo position peaked at $1.86M in Q4 2013.
  • 356 funds tracked by Wall St. Rank held Masimo as of Q3 2023.

Based on William Blair & Company's 13F filing for Q3 2023, filed 9 Nov 2023.