Ardsley Advisory Partners’s Boston Scientific BSX Stock Holding History

Ardsley Advisory Partners’s Portfolio BSX Stock Details BSX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	–	Sell	-150,000	Closed	-$9.41M	–	161
2026 Q1	$9.41M	Buy	+150,000	New	+$12M	1.2%	24
2023 Q4	–	Sell	-101,650	Closed	-$5.37M	–	143
2023 Q3	$5.37M	Buy	+101,650	New	+$5.33M	1.2%	27
2020 Q4	–	Sell	-37,250	Closed	-$1.42M	–	145
2020 Q3	$1.42M	Buy	37,250 +26,250	+239%	+$1.01M	0.27%	53
2020 Q2	$386K	Buy	+11,000	New	+$396K	0.08%	93
2020 Q1	–	Sell	-27,500	Closed	-$1.24M	–	116
2019 Q4	$1.24M	Buy	27,500 +500	+2%	+$20.9K	0.2%	64
2019 Q3	$1.1M	Sell	27,000 -6,000	-18%	-$254K	0.25%	62
2019 Q2	$1.42M	Buy	33,000 +10,500	+47%	+$404K	0.22%	57
2019 Q1	$864K	Buy	22,500 +2,500	+13%	+$95.5K	0.17%	60
2018 Q4	$707K	Buy	20,000 +7,500	+60%	+$272K	0.18%	55
2018 Q3	$481K	Buy	12,500 +2,500	+25%	+$87.3K	0.06%	109
2018 Q2	$327K	Sell	10,000 -10,000	-50%	-$302K	0.05%	134
2018 Q1	$547K	Hold	20,000	–	–	0.08%	95
2017 Q4	$496K	Buy	+20,000	New	+$552K	0.06%	93
2017 Q1	–	Sell	-10,000	Closed	-$216K	–	156
2016 Q4	$216K	Sell	10,000 -2,500	-20%	-$54.5K	0.04%	114
2016 Q3	$298K	Buy	+12,500	New	+$298K	0.05%	113
2015 Q4	–	Sell	-15,000	Closed	-$246K	–	146
2015 Q3	$246K	Buy	+15,000	New	+$256K	0.06%	115
2015 Q1	–	Sell	-15,000	Closed	-$199K	–	197
2014 Q4	$199K	Sell	15,000 -10,000	-40%	-$128K	0.03%	166
2014 Q3	$295K	Sell	25,000 -5,000	-17%	-$63K	0.04%	148
2014 Q2	$383K	Buy	30,000 +5,000	+20%	+$65K	0.05%	184
2014 Q1	$338K	Buy	25,000 +10,000	+67%	+$131K	0.05%	171
2013 Q4	$180K	Buy	+15,000	New	+$177K	0.02%	146

Other funds holding BSX

Assenagon Asset Management Senningerberg, Luxembourg $80.2B AUM 50.57% 1-Year Est. Return

Ninety One (UK) London, United Kingdom $44.7B AUM 17.24% 1-Year Est. Return

ATO

Alecta Tjanstepension Omsesidigt Stockholm, Sweden $23.8B AUM 34.25% 1-Year Est. Return

Rathbones Group Liverpool, United Kingdom $27.1B AUM 20.2% 1-Year Est. Return

Handelsbanken Fonder Stockholm, Sweden $35.1B AUM 47.76% 1-Year Est. Return

New York State Teachers Retirement System (NYSTRS) Albany, New York $54.2B AUM 43.77% 1-Year Est. Return

Retirement Systems of Alabama Montgomery, Alabama $33.2B AUM 38.15% 1-Year Est. Return

YIH

Y-Intercept (HK) Hong Kong $5.05B AUM 17.89% 1-Year Est. Return

BPC

Banque Pictet & Cie Geneva 73, Switzerland $16B AUM 29.1% 1-Year Est. Return

FFM

Fisher Funds Management Auckland, New Zealand $3.52B AUM 17.59% 1-Year Est. Return

Ardsley Advisory Partners's BSX Position: Q2 2026 in Review

Ardsley Advisory Partners sold out of Boston Scientific (BSX) in Q2 2026, closing a stake of 150,000 shares — an estimated $9.41M sold.

Ardsley Advisory Partners first reported a position in BSX in Q4 2013 and held it in 21 quarters. The position peaked at $9.41M in Q1 2026. 425 funds tracked by Wall St. Rank hold BSX as of Q2 2026.

Ardsley Advisory Partners reported no remaining Boston Scientific position as of Q2 2026 after selling out during the quarter.
Ardsley Advisory Partners sold 150,000 Boston Scientific shares in Q2 2026, an estimated $9.41M.
Ardsley Advisory Partners first reported a position in Boston Scientific in Q4 2013 and held it in 21 quarters.
Ardsley Advisory Partners's Boston Scientific position peaked at $9.41M in Q1 2026.
425 funds tracked by Wall St. Rank held Boston Scientific as of Q2 2026.

Based on Ardsley Advisory Partners's 13F filing for Q2 2026, filed 13 Jul 2026.