Primecap Management’s Boston Scientific BSX Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$2.04B Buy
32,529,774
+1,433,590
+5% +$115M 1.61% 16
2025
Q4
$2.97B Sell
31,096,184
-2,005,910
-6% -$197M 2.24% 8
2025
Q3
$3.23B Sell
33,102,094
-1,560,628
-5% -$162M 2.48% 8
2025
Q2
$3.72B Sell
34,662,722
-1,834,224
-5% -$186M 2.95% 5
2025
Q1
$3.68B Sell
36,496,946
-432,720
-1% -$43.6M 3.04% 3
2024
Q4
$3.3B Sell
36,929,666
-896,834
-2% -$78.9M 2.55% 5
2024
Q3
$3.17B Sell
37,826,500
-132,561
-0.3% -$10.4M 2.33% 8
2024
Q2
$2.92B Buy
37,959,061
+11,396
+0% +$834K 2.12% 12
2024
Q1
$2.6B Buy
37,947,665
+42,006
+0.1% +$2.7M 1.94% 13
2023
Q4
$2.19B Buy
37,905,659
+550,490
+1% +$29.4M 1.73% 14
2023
Q3
$1.97B Sell
37,355,169
-73,810
-0.2% -$3.87M 1.66% 14
2023
Q2
$2.02B Sell
37,428,979
-899,250
-2% -$47M 1.69% 15
2023
Q1
$1.92B Buy
38,328,229
+676,370
+2% +$31.9M 1.67% 16
2022
Q4
$1.74B Buy
37,651,859
+1,550
+0% +$67.1K 1.59% 17
2022
Q3
$1.46B Sell
37,650,309
-169,300
-0.4% -$6.79M 1.41% 19
2022
Q2
$1.41B Sell
37,819,609
-101,210
-0.3% -$4.12M 1.26% 24
2022
Q1
$1.68B Sell
37,920,819
-197,800
-0.5% -$8.57M 1.27% 20
2021
Q4
$1.62B Sell
38,118,619
-1,488,690
-4% -$62.6M 1.12% 23
2021
Q3
$1.72B Sell
39,607,309
-413,136
-1% -$18.3M 1.21% 23
2021
Q2
$1.71B Sell
40,020,445
-991,895
-2% -$41.7M 1.15% 25
2021
Q1
$1.59B Buy
41,012,340
+1,551,355
+4% +$58.7M 1.11% 25
2020
Q4
$1.42B Sell
39,460,985
-1,017,930
-3% -$36.7M 1.05% 28
2020
Q3
$1.55B Sell
40,478,915
-1,202,990
-3% -$46.4M 1.28% 21
2020
Q2
$1.46B Sell
41,681,905
-630,120
-1% -$22.7M 1.26% 22
2020
Q1
$1.38B Sell
42,312,025
-2,265,600
-5% -$88.5M 1.35% 20
2019
Q4
$2.02B Sell
44,577,625
-82,400
-0.2% -$3.45M 1.46% 21
2019
Q3
$1.82B Sell
44,660,025
-483,952
-1% -$20.5M 1.45% 21
2019
Q2
$1.94B Buy
45,143,977
+89,200
+0.2% +$3.43M 1.43% 22
2019
Q1
$1.73B Sell
45,054,777
-8,000
-0% -$306K 1.27% 23
2018
Q4
$1.59B Buy
45,062,777
+294,992
+0.7% +$10.7M 1.29% 23
2018
Q3
$1.72B Sell
44,767,785
-39,356
-0.1% -$1.37M 1.16% 24
2018
Q2
$1.47B Buy
44,807,141
+87,100
+0.2% +$2.63M 1.09% 24
2018
Q1
$1.22B Buy
44,720,041
+842,479
+2% +$22.9M 0.92% 34
2017
Q4
$1.09B Buy
43,877,562
+1,709,295
+4% +$47.1M 0.83% 36
2017
Q3
$1.23B Sell
42,168,267
-200,900
-0.5% -$5.55M 1.02% 31
2017
Q2
$1.17B Buy
42,369,167
+613,200
+1% +$16.3M 1.01% 29
2017
Q1
$1.04B Sell
41,755,967
-164,490
-0.4% -$4M 0.94% 31
2016
Q4
$907M Buy
41,920,457
+115,407
+0.3% +$2.52M 0.89% 37
2016
Q3
$995M Sell
41,805,050
-835,400
-2% -$19.9M 0.99% 31
2016
Q2
$997M Sell
42,640,450
-713,950
-2% -$15.4M 1.06% 26
2016
Q1
$815M Buy
43,354,400
+7,700
+0% +$135K 0.85% 39
2015
Q4
$799M Sell
43,346,700
-261,664
-0.6% -$4.69M 0.82% 37
2015
Q3
$716M Sell
43,608,364
-2,489,200
-5% -$42.5M 0.79% 35
2015
Q2
$816M Sell
46,097,564
-349,785
-0.8% -$6.25M 0.8% 35
2015
Q1
$824M Sell
46,447,349
-510,000
-1% -$8.06M 0.81% 36
2014
Q4
$622M Sell
46,957,349
-121,850
-0.3% -$1.56M 0.63% 45
2014
Q3
$556M Sell
47,079,199
-1,372,820
-3% -$17.3M 0.59% 47
2014
Q2
$619M Sell
48,452,019
-899,800
-2% -$11.7M 0.68% 42
2014
Q1
$667M Buy
49,351,819
+946,600
+2% +$12.4M 0.76% 32
2013
Q4
$582M Sell
48,405,219
-257,300
-0.5% -$3.04M 0.7% 34
2013
Q3
$571M Sell
48,662,519
-376,700
-0.8% -$4.07M 0.75% 34
2013
Q2
$455M Buy
+49,039,219
New +$416M 0.65% 42

Other funds holding BSX

Primecap Management's BSX Position: Q1 2026 in Review

Primecap Management increased its Boston Scientific (BSX) stake by 4.6% in Q1 2026, buying an estimated $115M and bringing the position to 32,529,774 shares worth $2.04B. The position accounts for 1.61% of the portfolio, ranked #16.

Primecap Management first reported a position in BSX in Q2 2013 and has held it in 52 quarters since. The position peaked at $3.72B in Q2 2025. 1,664 funds tracked by Wall St. Rank hold BSX as of Q1 2026.

  • Primecap Management held 32,529,774 shares of Boston Scientific worth $2.04B as of Q1 2026.
  • Primecap Management bought 1,433,590 Boston Scientific shares in Q1 2026, an estimated $115M.
  • Boston Scientific made up 1.61% of Primecap Management's portfolio in Q1 2026, its #16 holding.
  • Primecap Management first reported a position in Boston Scientific in Q2 2013 and has held it in 52 quarters since.
  • Primecap Management's Boston Scientific position peaked at $3.72B in Q2 2025.
  • 1,664 funds tracked by Wall St. Rank held Boston Scientific as of Q1 2026.

Based on Primecap Management's 13F filing for Q1 2026, filed 11 May 2026.