XTX Topco’s Assembly Biosciences ASMB Stock Holding History

XTX Topco’s Portfolio ASMB Stock Details ASMB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$299K	Buy	+10,785	New	+$308K	0.01%	2483
2025 Q4	–	Sell	-12,806	Closed	-$328K	–	3307
2025 Q3	$328K	Buy	+12,806	New	+$281K	0.02%	1441
2024 Q1	–	Sell	-3,454	Closed	-$34K	–	1823
2023 Q4	$34K	Buy	3,454 +1,351	+64%	+$12.8K	0.01%	1293
2023 Q3	$22.3K	Buy	+2,103	New	+$25.3K	﹤0.01%	1362
2022 Q3	–	Sell	-1,101	Closed	-$28K	–	1095
2022 Q2	$28K	Buy	+1,101	New	+$25.3K	0.01%	795
2022 Q1	–	Sell	-2,035	Closed	-$57K	–	668
2021 Q4	$57K	Buy	+2,035	New	+$66.7K	0.03%	551
2021 Q2	–	Sell	-954	Closed	-$53K	–	800
2021 Q1	$53K	Buy	+954	New	+$63.2K	0.03%	618

Other funds holding ASMB

Gilead Sciences Foster City, California $2.12B AUM 143.53% 1-Year Est. Return

FCM

Farallon Capital Management San Francisco, California $17.5B AUM 50.95% 1-Year Est. Return

RCM

RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return

Commodore Capital New York $1.73B AUM 298.96% 1-Year Est. Return

Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return

PBA

Paradigm Biocapital Advisors New York $4.89B AUM 251.12% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

PHP

Parkman Healthcare Partners Stamford, Connecticut $970M AUM 79.46% 1-Year Est. Return

Point72 Asset Management Stamford, Connecticut $78.1B AUM 55.25% 1-Year Est. Return

Blackstone Inc New York $25.6B AUM 26.83% 1-Year Est. Return

XTX Topco's ASMB Position: Q1 2026 in Review

XTX Topco opened a new position in Assembly Biosciences (ASMB) in Q1 2026: 10,785 shares worth $299K. The stake represents 0.01% of the portfolio and ranks #2483 among its holdings. This is a return to the name: XTX Topco previously reported a position in ASMB as recently as Q3 2025.

XTX Topco first reported a position in ASMB in Q1 2021 and has held it in 7 quarters since. The position peaked at $328K in Q3 2025. 75 funds tracked by Wall St. Rank hold ASMB as of Q1 2026.

XTX Topco held 10,785 shares of Assembly Biosciences worth $299K as of Q1 2026.
Assembly Biosciences was a new XTX Topco position in Q1 2026.
Assembly Biosciences made up 0.01% of XTX Topco's portfolio in Q1 2026, its #2483 holding.
XTX Topco first reported a position in Assembly Biosciences in Q1 2021 and has held it in 7 quarters since.
XTX Topco's Assembly Biosciences position peaked at $328K in Q3 2025.
75 funds tracked by Wall St. Rank held Assembly Biosciences as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.