Millennium Management’s X4 Pharmaceuticals XFOR Stock Holding History

Millennium Management’s Portfolio XFOR Stock Details XFOR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$5M	Buy	1,210,514 +1,154,536	+2,062%	+$4.32M	﹤0.01%	2948
2025 Q4	$224K	Sell	55,978 -8,817	-14%	-$32K	﹤0.01%	5419
2025 Q3	$222K	Sell	64,795 -13,266	-17%	-$34.2K	﹤0.01%	5496
2025 Q2	$148K	Buy	78,061 +69,436	+805%	+$284K	﹤0.01%	5447
2025 Q1	$61.2K	Hold	8,625	–	–	﹤0.01%	5510
2024 Q4	$190K	Sell	8,625 -3,482	-29%	-$55.5K	﹤0.01%	5325
2024 Q3	$243K	Buy	12,107 +660	+6%	+$13.8K	﹤0.01%	5324
2024 Q2	$199K	Buy	11,447 +2,822	+33%	+$92.3K	﹤0.01%	5142
2024 Q1	$360K	Sell	8,625 -46,852	-84%	-$1.3M	﹤0.01%	5025
2023 Q4	$1.4M	Sell	55,477 -65,055	-54%	-$1.58M	﹤0.01%	3895
2023 Q3	$3.94M	Sell	120,532 -61,188	-34%	-$2.67M	﹤0.01%	2929
2023 Q2	$10.6M	Buy	181,720 +145,713	+405%	+$7.49M	0.01%	1971
2023 Q1	$940K	Sell	36,007 -2,441	-6%	-$71.6K	﹤0.01%	4149
2022 Q4	$1.15M	Buy	38,448 +34,683	+921%	+$1.64M	﹤0.01%	4032
2022 Q3	$193K	Buy	3,765 +1,175	+45%	+$40.6K	﹤0.01%	5678
2022 Q2	$75K	Sell	2,590 -10,875	-81%	-$414K	﹤0.01%	6039
2022 Q1	$707K	Buy	13,465 +6,716	+100%	+$385K	﹤0.01%	4852
2021 Q4	$464K	Sell	6,749 -2,163	-24%	-$274K	﹤0.01%	5121
2021 Q3	$1.41M	Sell	8,912 -3,955	-31%	-$651K	﹤0.01%	4301
2021 Q2	$2.51M	Buy	+12,867	New	+$3.24M	﹤0.01%	3673
2020 Q2	–	Sell	-552	Closed	-$165K	–	4657
2020 Q1	$165K	Sell	552 -1,659	-75%	-$471K	﹤0.01%	3447
2019 Q4	$710K	Sell	2,211 -4,077	-65%	-$1.46M	﹤0.01%	3170
2019 Q3	$2.4M	Buy	6,288 +1,233	+24%	+$488K	﹤0.01%	2336
2019 Q2	$2.27M	Buy	+5,055	New	+$2.57M	﹤0.01%	2325
2018 Q1	–	Sell	-130	Closed	-$299K	–	4141
2017 Q4	$299K	Buy	+130	New	+$329K	﹤0.01%	3351

Other funds holding XFOR

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

EAM

Empery Asset Management New York $83M AUM

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

BCLSI

Bain Capital Life Sciences Investors Boston, Massachusetts $1.11B AUM 171.34% 1-Year Est. Return

Perceptive Advisors New York $5.12B AUM 314.02% 1-Year Est. Return

SVCM

Saturn V Capital Management Austin, Texas $552M AUM 551.78% 1-Year Est. Return

DTC

Deep Track Capital Greenwich, Connecticut $6.12B AUM 144% 1-Year Est. Return

KCM

Kalehua Capital Management Dallas, Texas $141M AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Braidwell Stamford, Connecticut $3B AUM 46.72% 1-Year Est. Return

Millennium Management's XFOR Position: Q1 2026 in Review

Millennium Management increased its X4 Pharmaceuticals (XFOR) stake by 2,062% in Q1 2026, buying an estimated $4.32M and bringing the position to 1,210,514 shares worth $5M. The position accounts for ﹤0.01% of the portfolio, ranked #2948.

Millennium Management first reported a position in XFOR in Q4 2017 and has held it in 25 quarters since. The position peaked at $10.6M in Q2 2023. 84 funds tracked by Wall St. Rank hold XFOR as of Q1 2026.

Millennium Management held 1,210,514 shares of X4 Pharmaceuticals worth $5M as of Q1 2026.
Millennium Management bought 1,154,536 X4 Pharmaceuticals shares in Q1 2026, an estimated $4.32M.
X4 Pharmaceuticals made up ﹤0.01% of Millennium Management's portfolio in Q1 2026, its #2948 holding.
Millennium Management first reported a position in X4 Pharmaceuticals in Q4 2017 and has held it in 25 quarters since.
Millennium Management's X4 Pharmaceuticals position peaked at $10.6M in Q2 2023.
84 funds tracked by Wall St. Rank held X4 Pharmaceuticals as of Q1 2026.

Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.