Marshall Wace’s iShares Biotechnology ETF IBB Stock Holding History

Marshall Wace’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	$287K	Sell	1,700 -3,145	-65%	-$538K	﹤0.01%	2662
2025 Q4	$818K	Buy	+4,845	New	+$787K	﹤0.01%	2031
2025 Q3	–	Sell	-1,147	Closed	-$157K	–	3102
2025 Q2	$145K	Buy	+1,147	New	+$141K	﹤0.01%	2503
2024 Q3	–	Sell	-18,089	Closed	-$2.62M	–	2705
2024 Q2	$2.48M	Buy	+18,089	New	+$2.41M	﹤0.01%	1267
2023 Q3	–	Sell	-42,611	Closed	-$5.41M	–	2424
2023 Q2	$5.41M	Buy	42,611 +24,324	+133%	+$3.16M	0.01%	985
2023 Q1	$2.36M	Sell	18,287 -60,294	-77%	-$7.89M	0.01%	1368
2022 Q4	$10.3M	Buy	78,581 +63,745	+430%	+$8.24M	0.02%	777
2022 Q3	$1.74M	Buy	14,836 +8,132	+121%	+$1.01M	﹤0.01%	2101
2022 Q2	$788K	Buy	+6,704	New	+$796K	﹤0.01%	2576
2021 Q3	–	Sell	-796	Closed	-$134K	–	3201
2021 Q2	$130K	Buy	+796	New	+$123K	﹤0.01%	2513
2019 Q4	–	Sell	-1,294	Closed	-$129K	–	1875
2019 Q3	$129K	Buy	+1,294	New	+$135K	﹤0.01%	1360
2017 Q3	–	Sell	-18,978	Closed	-$1.96M	–	375
2017 Q2	$1.96M	Buy	+18,978	New	+$1.87M	0.09%	145
2017 Q1	–	Sell	-17,205	Closed	-$1.52M	–	509
2016 Q4	$1.52M	Buy	+17,205	New	+$1.57M	0.01%	693

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

Marshall Wace's IBB Position: Q1 2026 in Review

Marshall Wace reduced its iShares Biotechnology ETF (IBB) stake by 65% in Q1 2026, selling an estimated $538K and leaving 1,700 shares worth $287K. The position accounts for ﹤0.01% of the portfolio, ranked #2662.

Marshall Wace first reported a position in IBB in Q4 2016 and has held it in 13 quarters since. The position peaked at $10.3M in Q4 2022. 917 funds tracked by Wall St. Rank hold IBB as of Q1 2026.

Marshall Wace held 1,700 shares of iShares Biotechnology ETF worth $287K as of Q1 2026.
Marshall Wace sold 3,145 iShares Biotechnology ETF shares in Q1 2026, an estimated $538K.
iShares Biotechnology ETF made up ﹤0.01% of Marshall Wace's portfolio in Q1 2026, its #2662 holding.
Marshall Wace first reported a position in iShares Biotechnology ETF in Q4 2016 and has held it in 13 quarters since.
Marshall Wace's iShares Biotechnology ETF position peaked at $10.3M in Q4 2022.
917 funds tracked by Wall St. Rank held iShares Biotechnology ETF as of Q1 2026.

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