AllianceBernstein’s Masimo MASI Stock Holding History

AllianceBernstein’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	$59.2M	Buy	455,354 +401,131	+740%	+$63M	0.02%	551
2025 Q4	$7.05M	Buy	54,223 +662	+1%	+$94.8K	﹤0.01%	1383
2025 Q3	$7.9M	Sell	53,561 -790,506	-94%	-$120M	﹤0.01%	1322
2025 Q2	$142M	Sell	844,067 -21,803	-3%	-$3.48M	0.05%	277
2025 Q1	$144M	Sell	865,870 -81,521	-9%	-$14.1M	0.05%	270
2024 Q4	$157M	Buy	947,391 +878,587	+1,277%	+$139M	0.05%	271
2024 Q3	$9.17M	Buy	68,804 +6,889	+11%	+$799K	﹤0.01%	1228
2024 Q2	$7.8M	Buy	61,915 +860	+1%	+$113K	﹤0.01%	1288
2024 Q1	$8.97M	Sell	61,055 -6,462	-10%	-$834K	﹤0.01%	1210
2023 Q4	$7.91M	Buy	67,517 +5,485	+9%	+$511K	﹤0.01%	1279
2023 Q3	$5.44M	Sell	62,032 -7,611	-11%	-$886K	﹤0.01%	1382
2023 Q2	$11.5M	Sell	69,643 -2,176	-3%	-$379K	﹤0.01%	1059
2023 Q1	$13.3M	Sell	71,819 -13,881	-16%	-$2.34M	0.01%	978
2022 Q4	$12.7M	Buy	85,700 +10,143	+13%	+$1.4M	0.01%	985
2022 Q3	$10.7M	Sell	75,557 -4,011	-5%	-$586K	0.01%	1056
2022 Q2	$10.4M	Buy	79,568 +509	+0.6%	+$68.1K	﹤0.01%	1097
2022 Q1	$11.5M	Sell	79,059 -1,217	-2%	-$234K	﹤0.01%	1149
2021 Q4	$23.5M	Sell	80,276 -2,281	-3%	-$650K	0.01%	895
2021 Q3	$22.3M	Sell	82,557 -992	-1%	-$269K	0.01%	906
2021 Q2	$20.3M	Sell	83,549 -2,931	-3%	-$669K	0.01%	947
2021 Q1	$19.9M	Buy	86,480 +1,436	+2%	+$361K	0.01%	925
2020 Q4	$22.8M	Sell	85,044 -1,798	-2%	-$448K	0.01%	827
2020 Q3	$20.5M	Buy	86,842 +1,972	+2%	+$442K	0.01%	791
2020 Q2	$19.4M	Sell	84,870 -4,158	-5%	-$913K	0.01%	773
2020 Q1	$15.8M	Sell	89,028 -1,200	-1%	-$206K	0.01%	767
2019 Q4	$14.3M	Sell	90,228 -8,602	-9%	-$1.29M	0.01%	936
2019 Q3	$14.7M	Sell	98,830 -1,376	-1%	-$209K	0.01%	900
2019 Q2	$14.9M	Sell	100,206 -20	-0%	-$2.74K	0.01%	900
2019 Q1	$13.9M	Sell	100,226 -1,200	-1%	-$151K	0.01%	924
2018 Q4	$10.9M	Buy	101,426 +52,286	+106%	+$5.83M	0.01%	954
2018 Q3	$6.12M	Sell	49,140 -19,259	-28%	-$2.14M	﹤0.01%	1186
2018 Q2	$6.68M	Sell	68,399 -35,172	-34%	-$3.34M	﹤0.01%	1111
2018 Q1	$9.11M	Sell	103,571 -3,120	-3%	-$272K	0.01%	975
2017 Q4	$9.05M	Buy	106,691 +2,000	+2%	+$173K	0.01%	975
2017 Q3	$9.06M	Sell	104,691 -35,230	-25%	-$3.12M	0.01%	978
2017 Q2	$12.8M	Buy	139,921 +12,660	+10%	+$1.16M	0.01%	870
2017 Q1	$11.9M	Buy	127,261 +14,164	+13%	+$1.17M	0.01%	889
2016 Q4	$7.62M	Buy	113,097 +12,020	+12%	+$739K	0.01%	1006
2016 Q3	$6.01M	Buy	101,077 +11,840	+13%	+$668K	0.01%	1043
2016 Q2	$4.69M	Buy	89,237 +10,050	+13%	+$473K	﹤0.01%	1107
2016 Q1	$3.31M	Buy	79,187 +4,187	+6%	+$157K	﹤0.01%	1249
2015 Q4	$3.11M	Sell	75,000 -2,937	-4%	-$120K	﹤0.01%	1298
2015 Q3	$3M	Sell	77,937 -10,360	-12%	-$423K	﹤0.01%	1340
2015 Q2	$3.42M	Sell	88,297 -13,300	-13%	-$476K	﹤0.01%	1346
2015 Q1	$3.35M	Sell	101,597 -3,300	-3%	-$94.9K	﹤0.01%	1372
2014 Q4	$2.76M	Sell	104,897 -3,500	-3%	-$86.4K	﹤0.01%	1488
2014 Q3	$2.31M	Hold	108,397	–	–	﹤0.01%	1612
2014 Q2	$2.56M	Buy	108,397 +16,222	+18%	+$402K	﹤0.01%	1592
2014 Q1	$2.52M	Buy	92,175 +161	+0.2%	+$4.59K	﹤0.01%	1533
2013 Q4	$2.69M	Sell	92,014 -16,839	-15%	-$471K	﹤0.01%	1502
2013 Q3	$2.9M	Sell	108,853 -171	-0.2%	-$4.22K	﹤0.01%	1414
2013 Q2	$2.31M	Buy	+109,024	New	+$2.29M	﹤0.01%	1510

Other funds holding MASI

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 London, United Kingdom $416B AUM 33.63% 1-Year Est. Return

HBK Investments Dallas, Texas $9.85B AUM 55.6% 1-Year Est. Return

Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

AllianceBernstein's MASI Position: Q1 2026 in Review

AllianceBernstein increased its Masimo (MASI) stake by 740% in Q1 2026, buying an estimated $63M and bringing the position to 455,354 shares worth $59.2M. The position accounts for 0.02% of the portfolio, ranked #551.

AllianceBernstein first reported a position in MASI in Q2 2013 and has held it in 52 quarters since. The position peaked at $157M in Q4 2024. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

AllianceBernstein held 455,354 shares of Masimo worth $59.2M as of Q1 2026.
AllianceBernstein bought 401,131 Masimo shares in Q1 2026, an estimated $63M.
Masimo made up 0.02% of AllianceBernstein's portfolio in Q1 2026, its #551 holding.
AllianceBernstein first reported a position in Masimo in Q2 2013 and has held it in 52 quarters since.
AllianceBernstein's Masimo position peaked at $157M in Q4 2024.
445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on AllianceBernstein's 13F filing for Q1 2026, filed 15 May 2026.