Marshall Wace’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 | $227M | Buy |
3,611,020
+653,783
| +22% | +$52.3M | 0.23% | 64 |
|
|
2025
Q4 | $282M | Sell |
2,957,237
-6,841,803
| -70% | -$671M | 0.26% | 60 |
|
|
2025
Q3 | $957M | Buy |
9,799,040
+2,301,383
| +31% | +$238M | 0.97% | 8 |
|
|
2025
Q2 | $805M | Sell |
7,497,657
-450,505
| -6% | -$45.6M | 0.91% | 10 |
|
|
2025
Q1 | $802M | Sell |
7,948,162
-917,681
| -10% | -$92.4M | 1.02% | 8 |
|
|
2024
Q4 | $792M | Buy |
8,865,843
+625,324
| +8% | +$55M | 0.95% | 8 |
|
|
2024
Q3 | $691M | Buy |
8,240,519
+1,520,039
| +23% | +$120M | 0.84% | 14 |
|
|
2024
Q2 | $518M | Buy |
6,720,480
+3,608,158
| +116% | +$264M | 0.69% | 15 |
|
|
2024
Q1 | $213M | Buy |
3,112,322
+1,495,021
| +92% | +$96.1M | 0.32% | 49 |
|
|
2023
Q4 | $93.5M | Sell |
1,617,301
-2,185,557
| -57% | -$117M | 0.16% | 125 |
|
|
2023
Q3 | $201M | Buy |
3,802,858
+1,921,591
| +102% | +$101M | 0.41% | 41 |
|
|
2023
Q2 | $102M | Sell |
1,881,267
-2,351,499
| -56% | -$123M | 0.2% | 105 |
|
|
2023
Q1 | $212M | Sell |
4,232,766
-1,589,247
| -27% | -$74.9M | 0.45% | 35 |
|
|
2022
Q4 | $269M | Sell |
5,822,013
-4,268,346
| -42% | -$185M | 0.61% | 20 |
|
|
2022
Q3 | $391M | Sell |
10,090,359
-388,778
| -4% | -$15.6M | 0.86% | 6 |
|
|
2022
Q2 | $391M | Buy |
10,479,137
+938,755
| +10% | +$38.2M | 0.8% | 7 |
|
|
2022
Q1 | $423M | Buy |
9,540,382
+3,182,702
| +50% | +$138M | 0.8% | 12 |
|
|
2021
Q4 | $270M | Buy |
6,357,680
+5,411,822
| +572% | +$227M | 0.5% | 28 |
|
|
2021
Q3 | $41M | Sell |
945,858
-28,943
| -3% | -$1.28M | 0.17% | 112 |
|
|
2021
Q2 | $41.7M | Buy |
974,801
+565,427
| +138% | +$23.8M | 0.19% | 95 |
|
|
2021
Q1 | $15.8M | Sell |
409,374
-325,708
| -44% | -$12.3M | 0.07% | 276 |
|
|
2020
Q4 | $26.4M | Buy |
735,082
+253,798
| +53% | +$9.15M | 0.14% | 142 |
|
|
2020
Q3 | $18.4M | Sell |
481,284
-3,759,644
| -89% | -$145M | 0.12% | 181 |
|
|
2020
Q2 | $149M | Buy |
4,240,928
+506,108
| +14% | +$18.2M | 1.04% | 12 |
|
|
2020
Q1 | $122M | Sell |
3,734,820
-4,436,532
| -54% | -$173M | 1.22% | 12 |
|
|
2019
Q4 | $370M | Sell |
8,171,352
-292,339
| -3% | -$12.2M | 2.54% | 1 |
|
|
2019
Q3 | $344M | Sell |
8,463,691
-1,081,691
| -11% | -$45.8M | 2.71% | 1 |
|
|
2019
Q2 | $410M | Buy |
9,545,382
+5,131,591
| +116% | +$197M | 3.38% | 1 |
|
|
2019
Q1 | $169M | Buy |
4,413,791
+3,158,088
| +251% | +$121M | 1.59% | 5 |
|
|
2018
Q4 | $44.4M | Buy |
1,255,703
+602,875
| +92% | +$21.9M | 0.45% | 36 |
|
|
2018
Q3 | $25.1M | Sell |
652,828
-1,220,533
| -65% | -$42.6M | 0.21% | 128 |
|
|
2018
Q2 | $61.3M | Buy |
1,873,361
+1,751,500
| +1,437% | +$52.8M | 0.92% | 16 |
|
|
2018
Q1 | $3.33M | Buy |
121,861
+10,853
| +10% | +$295K | 0.14% | 141 |
|
|
2017
Q4 | $2.75M | Buy |
111,008
+30,052
| +37% | +$829K | 0.12% | 154 |
|
|
2017
Q3 | $2.35M | Buy |
80,956
+55,074
| +213% | +$1.52M | 0.11% | 152 |
|
|
2017
Q2 | $725K | Sell |
25,882
-38,676
| -60% | -$1.03M | 0.03% | 211 |
|
|
2017
Q1 | $1.61M | Sell |
64,558
-3,608,738
| -98% | -$87.8M | 0.08% | 173 |
|
|
2016
Q4 | $79.5M | Sell |
3,673,296
-2,018,968
| -35% | -$44.1M | 0.52% | 40 |
|
|
2016
Q3 | $135M | Buy |
5,692,264
+2,433,372
| +75% | +$58M | 0.96% | 15 |
|
|
2016
Q2 | $76.2M | Buy |
3,258,892
+3,082,574
| +1,748% | +$66.7M | 0.64% | 35 |
|
|
2016
Q1 | $3.32M | Buy |
+176,318
| New | +$3.1M | 0.03% | 444 |
|
|
2015
Q4 | – | Sell |
-688,967
| Closed | -$11.3M | – | 978 |
|
|
2015
Q3 | $11.3M | Buy |
688,967
+645,689
| +1,492% | +$11M | 0.14% | 161 |
|
|
2015
Q2 | $766K | Sell |
43,278
-462,988
| -91% | -$8.27M | 0.01% | 643 |
|
|
2015
Q1 | $8.99M | Buy |
506,266
+415,504
| +458% | +$6.57M | 0.12% | 212 |
|
|
2014
Q4 | $1.2M | Sell |
90,762
-245,322
| -73% | -$3.14M | 0.02% | 544 |
|
|
2014
Q3 | $3.97M | Buy |
+336,084
| New | +$4.23M | 0.06% | 328 |
|
Other funds holding BSX
VCM
VPM
Marshall Wace's BSX Position: Q1 2026 in Review
Marshall Wace increased its Boston Scientific (BSX) stake by 22% in Q1 2026, buying an estimated $52.3M and bringing the position to 3,611,020 shares worth $227M. The position accounts for 0.23% of the portfolio, ranked #64.
Marshall Wace first reported a position in BSX in Q3 2014 and has held it in 46 quarters since. The position peaked at $957M in Q3 2025. 1,664 funds tracked by Wall St. Rank hold BSX as of Q1 2026.
- Marshall Wace held 3,611,020 shares of Boston Scientific worth $227M as of Q1 2026.
- Marshall Wace bought 653,783 Boston Scientific shares in Q1 2026, an estimated $52.3M.
- Boston Scientific made up 0.23% of Marshall Wace's portfolio in Q1 2026, its #64 holding.
- Marshall Wace first reported a position in Boston Scientific in Q3 2014 and has held it in 46 quarters since.
- Marshall Wace's Boston Scientific position peaked at $957M in Q3 2025.
- 1,664 funds tracked by Wall St. Rank held Boston Scientific as of Q1 2026.
Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.