Marshall Wace’s IO Biotech IOBT Stock Holding History

Marshall Wace’s Portfolio IOBT Stock Details IOBT Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	–	Sell	-301,291	Closed	-$18.1K	–	3434
2026 Q1	$18.1K	Sell	301,291 -128,047	-30%	-$43.7K	﹤0.01%	3059
2025 Q4	$262K	Sell	429,338 -623,293	-59%	-$463K	﹤0.01%	2502
2025 Q3	$379K	Sell	1,052,631 -1,052,631	-50%	-$1.81M	﹤0.01%	2339
2025 Q2	$2.93M	Hold	2,105,262	–	–	﹤0.01%	1391
2025 Q1	$2.29M	Hold	2,105,262	–	–	﹤0.01%	1412
2024 Q4	$1.94M	Hold	2,105,262	–	–	﹤0.01%	1448
2024 Q3	$2.21M	Hold	2,105,262	–	–	﹤0.01%	1332
2024 Q2	$2.46M	Hold	2,105,262	–	–	﹤0.01%	1270
2024 Q1	$3.68M	Hold	2,105,262	–	–	0.01%	1123
2023 Q4	$3.96M	Hold	2,105,262	–	–	0.01%	992
2023 Q3	$2.91M	Buy	+2,105,262	New	+$3.7M	0.01%	1065

Marshall Wace's IOBT Position: Q2 2026 in Review

Marshall Wace sold out of IO Biotech (IOBT) in Q2 2026, closing a stake of 301,291 shares — an estimated $18.1K sold.

Marshall Wace first reported a position in IOBT in Q3 2023 and held it in 11 quarters. The position peaked at $3.96M in Q4 2023. 0 funds tracked by Wall St. Rank hold IOBT as of Q2 2026.

Marshall Wace reported no remaining IO Biotech position as of Q2 2026 after selling out during the quarter.
Marshall Wace sold 301,291 IO Biotech shares in Q2 2026, an estimated $18.1K.
Marshall Wace first reported a position in IO Biotech in Q3 2023 and held it in 11 quarters.
Marshall Wace's IO Biotech position peaked at $3.96M in Q4 2023.
0 funds tracked by Wall St. Rank held IO Biotech as of Q2 2026.

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