Jane Street’s iShares Biotechnology ETF IBB Stock Holding History

Jane Street’s Portfolio IBB Stock Details IBB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$17.8M	Sell	105,700 -157,900	-60%	-$27M	﹤0.01%	1887
2025 Q4	$44.5M	Buy	263,600 +97,400	+59%	+$15.8M	0.01%	1021
2025 Q3	$24M	Buy	166,200 +118,300	+247%	+$16.1M	﹤0.01%	1474
2025 Q2	$6.06M	Buy	47,900 +10,100	+27%	+$1.24M	﹤0.01%	2745
2025 Q1	$4.83M	Buy	37,800 +31,200	+473%	+$4.23M	﹤0.01%	2985
2024 Q4	$873K	Sell	6,600 -125,000	-95%	-$17.6M	﹤0.01%	5640
2024 Q3	$19.2M	Buy	+131,600	New	+$19M	﹤0.01%	1274
2022 Q2	–	Sell	-134,700	Closed	-$17.6M	–	10152
2022 Q1	$17.6M	Sell	134,700 -103,200	-43%	-$13.4M	0.01%	1378
2021 Q4	$36.3M	Sell	237,900 -82,800	-26%	-$12.8M	0.01%	808
2021 Q3	$51.9M	Buy	320,700 +7,900	+3%	+$1.33M	0.02%	589
2021 Q2	$51.2M	Buy	312,800 +85,200	+37%	+$13.1M	0.02%	543
2021 Q1	$34.3M	Sell	227,600 -275,300	-55%	-$43.7M	0.02%	630
2020 Q4	$76.2M	Buy	502,900 +127,700	+34%	+$18.3M	0.04%	326
2020 Q3	$50.8M	Buy	375,200 +64,600	+21%	+$8.76M	0.03%	385
2020 Q2	$42.5M	Sell	310,600 -901,100	-74%	-$115M	0.03%	410
2020 Q1	$131M	Buy	1,211,700 +195,500	+19%	+$22.5M	0.13%	108
2019 Q4	$122M	Buy	1,016,200 +520,900	+105%	+$58.1M	0.17%	81
2019 Q3	$49.3M	Buy	495,300 +345,200	+230%	+$36.1M	0.08%	176
2019 Q2	$16.4M	Sell	150,100 -260,800	-63%	-$27.7M	0.03%	434
2019 Q1	$45.9M	Sell	410,900 -108,800	-21%	-$11.9M	0.07%	191
2018 Q4	$50.1M	Buy	519,700 +306,300	+144%	+$32.5M	0.11%	133
2018 Q3	$26M	Sell	213,400 -111,900	-34%	-$13.2M	0.05%	262
2018 Q2	$35.7M	Sell	325,300 -192,500	-37%	-$20.6M	0.08%	172
2018 Q1	$55.3M	Sell	517,800 -522,100	-50%	-$57.9M	0.14%	111
2017 Q4	$111M	Sell	1,039,900 -484,400	-32%	-$51.8M	0.32%	49
2017 Q3	$169M	Buy	1,524,300 +360,000	+31%	+$38.5M	0.55%	34
2017 Q2	$120M	Buy	1,164,300 +324,600	+39%	+$32M	0.42%	45
2017 Q1	$82.1M	Sell	839,700 -730,500	-47%	-$69.9M	0.37%	46
2016 Q4	$139M	Sell	1,570,200 -155,400	-9%	-$14.1M	0.61%	21
2016 Q3	$166M	Buy	1,725,600 +200,400	+13%	+$19.1M	0.8%	15
2016 Q2	$131M	Sell	1,525,200 -339,300	-18%	-$30.4M	0.65%	20
2016 Q1	$162M	Sell	1,864,500 -1,080,300	-37%	-$96.6M	0.91%	10
2015 Q4	$332M	Sell	2,944,800 -922,500	-24%	-$100M	2.07%	2
2015 Q3	$391M	Buy	3,867,300 +1,779,900	+85%	+$213M	2.45%	3
2015 Q2	$257M	Buy	2,087,400 +459,300	+28%	+$55M	1.66%	8
2015 Q1	$186M	Buy	1,628,100 +582,900	+56%	+$64.3M	1.44%	8
2014 Q4	$106M	Sell	1,045,200 -451,500	-30%	-$43.9M	0.8%	13
2014 Q3	$137M	Sell	1,496,700 -468,000	-24%	-$41.1M	1.39%	10
2014 Q2	$168M	Buy	1,964,700 +408,600	+26%	+$32.2M	2.14%	3
2014 Q1	$123M	Buy	1,556,100 +1,194,300	+330%	+$99.5M	1.36%	8
2013 Q4	$27.4M	Buy	361,800 +345,600	+2,133%	+$24.5M	0.39%	41
2013 Q3	$1.13M	Buy	+16,200	New	+$1.06M	0.01%	1016

Other funds holding IBB

Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

Citigroup New York $235B AUM 32.99% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

BNP Paribas Financial Markets Paris, France $206B AUM 31.61% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Envestnet Asset Management Chicago, Illinois $374B AUM 17.66% 1-Year Est. Return

Raymond James Financial St Petersburg, Florida $324B AUM 22.36% 1-Year Est. Return

Commerce Bank Kansas City, Missouri $20.7B AUM 23.76% 1-Year Est. Return

Wells Fargo San Francisco, California $530B AUM 22.01% 1-Year Est. Return

Jane Street's IBB Position: Q1 2026 in Review

Jane Street reduced its iShares Biotechnology ETF (IBB) stake by 98% in Q1 2026, selling an estimated $19.3M and leaving 1,907 shares worth $322K. The position accounts for ﹤0.01% of the portfolio, ranked #9087.

Jane Street first reported a position in IBB in Q2 2013 and has held it in 47 quarters since. The position peaked at $258M in Q4 2024. 917 funds tracked by Wall St. Rank hold IBB as of Q1 2026.

Jane Street held 1,907 shares of iShares Biotechnology ETF worth $322K as of Q1 2026.
Jane Street sold 112,844 iShares Biotechnology ETF shares in Q1 2026, an estimated $19.3M.
iShares Biotechnology ETF made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #9087 holding.
Jane Street first reported a position in iShares Biotechnology ETF in Q2 2013 and has held it in 47 quarters since.
Jane Street's iShares Biotechnology ETF position peaked at $258M in Q4 2024.
917 funds tracked by Wall St. Rank held iShares Biotechnology ETF as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.