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 Q2	–	Sell	-1,700	Closed	-$287K	–	3415
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 $1.55T AUM 33.47% 1-Year Est. Return

Citigroup New York $303B AUM 53.02% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

BNP Paribas Financial Markets Paris, France $289B AUM 60.46% 1-Year Est. Return

Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Envestnet Asset Management Chicago, Illinois $424B AUM 22.9% 1-Year Est. Return

Raymond James Financial St Petersburg, Florida $369B AUM 28.27% 1-Year Est. Return

Wells Fargo San Francisco, California $617B AUM 30.33% 1-Year Est. Return

Commerce Bank Kansas City, Missouri $22.8B AUM 28.56% 1-Year Est. Return

Marshall Wace's IBB Position: Q2 2026 in Review

Marshall Wace sold out of iShares Biotechnology ETF (IBB) in Q2 2026, closing a stake of 1,700 shares — an estimated $287K sold.

Marshall Wace first reported a position in IBB in Q4 2016 and held it in 13 quarters. The position peaked at $10.3M in Q4 2022. 960 funds tracked by Wall St. Rank hold IBB as of Q2 2026.

Marshall Wace reported no remaining iShares Biotechnology ETF position as of Q2 2026 after selling out during the quarter.
Marshall Wace sold 1,700 iShares Biotechnology ETF shares in Q2 2026, an estimated $287K.
Marshall Wace first reported a position in iShares Biotechnology ETF in Q4 2016 and held it in 13 quarters.
Marshall Wace's iShares Biotechnology ETF position peaked at $10.3M in Q4 2022.
960 funds tracked by Wall St. Rank held iShares Biotechnology ETF as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.