Massachusetts Financial Services
MASI

Massachusetts Financial Services’s Masimo MASI Stock Holding History

Massachusetts Financial Services’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 		$417M Sell
2,342,790
-321,085
-12% -$50.4M 0.14% 155
2025
Q4 		$346M Buy
2,663,875
+43,915
+2% +$6.29M 0.11% 179
2025
Q3 		$387M Buy
2,619,960
+149,567
+6% +$22.6M 0.12% 177
2025
Q2 		$416M Buy
2,470,393
+502,555
+26% +$80.3M 0.13% 167
2025
Q1 		$328M Buy
1,967,838
+232,671
+13% +$40.4M 0.11% 191
2024
Q4 		$287M Buy
1,735,167
+943,001
+119% +$149M 0.09% 214
2024
Q3 		$106M Buy
792,166
+70,440
+10% +$8.17M 0.03% 382
2024
Q2 		$90.9M Sell
721,726
-1,000,059
-58% -$132M 0.03% 387
2024
Q1 		$253M Buy
1,721,785
+114,475
+7% +$14.8M 0.08% 229
2023
Q4 		$188M Buy
1,607,310
+93,861
+6% +$8.75M 0.06% 266
2023
Q3 		$133M Buy
+1,513,449
New +$176M 0.05% 312
2022
Q1 		– Sell
-855,583
Closed -$250M – 880
2021
Q4 		$250M Buy
855,583
+9,847
+1% +$2.8M 0.07% 244
2021
Q3 		$229M Sell
845,736
-8,128
-1% -$2.2M 0.07% 243
2021
Q2 		$207M Sell
853,864
-146,488
-15% -$33.4M 0.06% 257
2021
Q1 		$230M Sell
1,000,352
-2,420
-0.2% -$608K 0.07% 234
2020
Q4 		$269M Sell
1,002,772
-29,671
-3% -$7.4M 0.09% 203
2020
Q3 		$244M Sell
1,032,443
-18,392
-2% -$4.12M 0.09% 201
2020
Q2 		$240M Sell
1,050,835
-65,819
-6% -$14.4M 0.09% 188
2020
Q1 		$198M Sell
1,116,654
-213,978
-16% -$36.7M 0.09% 186
2019
Q4 		$210M Buy
1,330,632
+262,920
+25% +$39.5M 0.08% 209
2019
Q3 		$159M Buy
1,067,712
+91,010
+9% +$13.8M 0.06% 231
2019
Q2 		$145M Buy
976,702
+723,914
+286% +$99.3M 0.06% 239
2019
Q1 		$35M Buy
252,788
+50,750
+25% +$6.37M 0.01% 438
2018
Q4 		$21.7M Sell
202,038
-22,403
-10% -$2.5M 0.01% 491
2018
Q3 		$28M Sell
224,441
-34
-0% -$3.77K 0.01% 482
2018
Q2 		$21.9M Buy
224,475
+113,248
+102% +$10.8M 0.01% 504
2018
Q1 		$9.78M Buy
+111,227
New +$9.7M ﹤0.01% 616
2017
Q3 		– Sell
-100,115
Closed -$9.13M – 858
2017
Q2 		$9.13M Sell
100,115
-35,659
-26% -$3.27M ﹤0.01% 619
2017
Q1 		$12.7M Sell
135,774
-171,066
-56% -$14.1M 0.01% 556
2016
Q4 		$20.7M Sell
306,840
-266,430
-46% -$16.4M 0.01% 499
2016
Q3 		$34.1M Sell
573,270
-675,230
-54% -$38.1M 0.02% 435
2016
Q2 		$65.6M Sell
1,248,500
-363,046
-23% -$17.1M 0.03% 299
2016
Q1 		$67.4M Buy
1,611,546
+71,850
+5% +$2.7M 0.04% 293
2015
Q4 		$63.9M Buy
1,539,696
+14,201
+0.9% +$580K 0.03% 305
2015
Q3 		$58.8M Sell
1,525,495
-402,927
-21% -$16.5M 0.03% 309
2015
Q2 		$74.7M Sell
1,928,422
-215,012
-10% -$7.7M 0.04% 288
2015
Q1 		$70.7M Buy
2,143,434
+407,374
+23% +$11.7M 0.04% 292
2014
Q4 		$45.7M Buy
1,736,060
+800,141
+85% +$19.7M 0.02% 349
2014
Q3 		$19.9M Buy
+935,919
New +$21.4M 0.01% 529

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
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
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Massachusetts Financial Services's MASI Position: Q1 2026 in Review

Massachusetts Financial Services reduced its Masimo (MASI) stake by 12% in Q1 2026, selling an estimated $50.4M and leaving 2,342,790 shares worth $417M. The position accounts for 0.14% of the portfolio, ranked #155.

Massachusetts Financial Services first reported a position in MASI in Q3 2014 and has held it in 39 quarters since. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Massachusetts Financial Services held 2,342,790 shares of Masimo worth $417M as of Q1 2026.
  • Massachusetts Financial Services sold 321,085 Masimo shares in Q1 2026, an estimated $50.4M.
  • Masimo made up 0.14% of Massachusetts Financial Services's portfolio in Q1 2026, its #155 holding.
  • Massachusetts Financial Services first reported a position in Masimo in Q3 2014 and has held it in 39 quarters since.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Massachusetts Financial Services's 13F filing for Q1 2026, filed 14 May 2026.