Bank of Montreal
MASI

Bank of Montreal’s Masimo MASI Stock Holding History

Bank of Montreal’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
2026
Q1 		$1M Buy
5,629
+653
+13% +$102K ﹤0.01% 2037
2025
Q4 		$647K Sell
4,976
-24
-0.5% -$3.44K ﹤0.01% 2185
2025
Q3 		$738K Sell
5,000
-563
-10% -$85.2K ﹤0.01% 2096
2025
Q2 		$936K Sell
5,563
-565
-9% -$90.2K ﹤0.01% 1934
2025
Q1 		$1.02M Buy
6,128
+17
+0.3% +$2.95K ﹤0.01% 1816
2024
Q4 		$1.01M Sell
6,111
-2,953
-33% -$466K ﹤0.01% 1868
2024
Q3 		$1.21M Buy
9,064
+3,335
+58% +$387K ﹤0.01% 1938
2024
Q2 		$760K Sell
5,729
-5,788
-50% -$762K ﹤0.01% 2182
2024
Q1 		$1.69M Buy
11,517
+5,961
+107% +$770K ﹤0.01% 1720
2023
Q4 		$667K Sell
5,556
-17,389
-76% -$1.62M ﹤0.01% 2314
2023
Q3 		$2.32M Sell
22,945
-80,019
-78% -$9.31M ﹤0.01% 1619
2023
Q2 		$17.2M Buy
102,964
+12,588
+14% +$2.19M 0.01% 793
2023
Q1 		$16.7M Sell
90,376
-116,853
-56% -$19.7M 0.01% 744
2022
Q4 		$30.7M Buy
207,229
+79,494
+62% +$10.9M 0.01% 545
2022
Q3 		$18.4K Buy
127,735
+33,995
+36% +$4.97M 0.01% 719
2022
Q2 		$13K Buy
93,740
+564
+0.6% +$75.5K 0.01% 940
2022
Q1 		$14.6M Buy
93,176
+33,581
+56% +$6.45M 0.01% 978
2021
Q4 		$17.8M Sell
59,595
-716
-1% -$204K 0.01% 773
2021
Q3 		$16.5M Sell
60,311
-629
-1% -$171K 0.01% 1038
2021
Q2 		$15.2M Sell
60,940
-2,415
-4% -$551K 0.01% 1046
2021
Q1 		$15M Buy
63,355
+11,894
+23% +$2.99M 0.01% 805
2020
Q4 		$14.4M Buy
51,461
+6,343
+14% +$1.58M 0.01% 841
2020
Q3 		$10.8M Sell
45,118
-107,568
-70% -$24.1M 0.01% 825
2020
Q2 		$36.1M Sell
152,686
-98,516
-39% -$21.6M 0.03% 412
2020
Q1 		$46.2M Buy
251,202
+13,251
+6% +$2.27M 0.05% 285
2019
Q4 		$37.6M Buy
237,951
+199,781
+523% +$30M 0.03% 490
2019
Q3 		$5.68M Buy
38,170
+12,274
+47% +$1.86M ﹤0.01% 1141
2019
Q2 		$3.85M Sell
25,896
-11,420
-31% -$1.57M ﹤0.01% 1333
2019
Q1 		$5.16M Sell
37,316
-34,128
-48% -$4.28M ﹤0.01% 1148
2018
Q4 		$7.67M Buy
71,444
+29,996
+72% +$3.34M 0.01% 882
2018
Q3 		$5.16M Sell
41,448
-3,120
-7% -$346K ﹤0.01% 1168
2018
Q2 		$4.35M Buy
44,568
+1,357
+3% +$129K ﹤0.01% 1238
2018
Q1 		$3.8M Sell
43,211
-48,580
-53% -$4.23M ﹤0.01% 1281
2017
Q4 		$7.78M Sell
91,791
-25,457
-22% -$2.21M 0.01% 950
2017
Q3 		$10.1M Buy
117,248
+6,554
+6% +$580K 0.01% 855
2017
Q2 		$10.1M Buy
110,694
+61,736
+126% +$5.67M 0.01% 849
2017
Q1 		$4.57M Sell
48,958
-7,860
-14% -$647K ﹤0.01% 1110
2016
Q4 		$3.52M Buy
56,818
+41,717
+276% +$2.56M ﹤0.01% 1244
2016
Q3 		$898K Sell
15,101
-2,776
-16% -$157K ﹤0.01% 1865
2016
Q2 		$939K Sell
17,877
-2,798
-14% -$132K ﹤0.01% 1866
2016
Q1 		$865K Buy
20,675
+1,049
+5% +$39.5K ﹤0.01% 1825
2015
Q4 		$815K Buy
19,626
+2,113
+12% +$86.3K ﹤0.01% 1799
2015
Q3 		$675K Sell
17,513
-3,536
-17% -$144K ﹤0.01% 1722
2015
Q2 		$816K Buy
21,049
+7,972
+61% +$286K ﹤0.01% 1749
2015
Q1 		$431K Sell
13,077
-216
-2% -$6.21K ﹤0.01% 2025
2014
Q4 		$350K Buy
13,293
+11,663
+716% +$288K ﹤0.01% 2229
2014
Q3 		$35K Sell
1,630
-1,334
-45% -$30.5K ﹤0.01% 3266
2014
Q2 		$70K Buy
2,964
+1,200
+68% +$29.8K ﹤0.01% 3042
2014
Q1 		$48K Hold
1,764
– – ﹤0.01% 3141
2013
Q4 		$52K Hold
1,764
– – ﹤0.01% 2849
2013
Q3 		$47K Hold
1,764
– – ﹤0.01% 2857
2013
Q2 		$37K Buy
+1,764
New +$37.1K ﹤0.01% 2830

Other funds holding MASI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
PCM
Politan Capital Management New York $985M AUM 3.12% 1-Year Est. Return
PCM
Pentwater Capital Management Naples, Florida $19.3B AUM 58.13% 1-Year Est. Return
Barclays
Barclays London, United Kingdom $416B AUM 33.63% 1-Year Est. Return
HI
HBK Investments Dallas, Texas $9.85B AUM 55.6% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Bank of Montreal's MASI Position: Q1 2026 in Review

Bank of Montreal increased its Masimo (MASI) stake by 13% in Q1 2026, buying an estimated $102K and bringing the position to 5,629 shares worth $1M. The position accounts for ﹤0.01% of the portfolio, ranked #2037.

Bank of Montreal first reported a position in MASI in Q2 2013 and has held it in 52 quarters since. The position peaked at $46.2M in Q1 2020. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Bank of Montreal held 5,629 shares of Masimo worth $1M as of Q1 2026.
  • Bank of Montreal bought 653 Masimo shares in Q1 2026, an estimated $102K.
  • Masimo made up ﹤0.01% of Bank of Montreal's portfolio in Q1 2026, its #2037 holding.
  • Bank of Montreal first reported a position in Masimo in Q2 2013 and has held it in 52 quarters since.
  • Bank of Montreal's Masimo position peaked at $46.2M in Q1 2020.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Bank of Montreal's 13F filing for Q1 2026, filed 13 May 2026.