Deep Track Capital’s MBX Biosciences MBX Stock Holding History

Deep Track Capital’s Portfolio MBX Stock Details MBX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$95.6M	Sell	1,732,569 -1,025,000	-37%	-$35.8M	1.39%	29
2026 Q1	$82.3M	Sell	2,757,569 -492,221	-15%	-$16.7M	1.34%	24
2025 Q4	$102M	Buy	3,249,790 +99,790	+3%	+$2.42M	1.83%	16
2025 Q3	$55.1M	Buy	3,150,000 +961,408	+44%	+$12.9M	1.54%	22
2025 Q2	$25M	Sell	2,188,592 -830,343	-28%	-$8.46M	0.8%	33
2025 Q1	$22.3M	Hold	3,018,935	–	–	0.72%	35
2024 Q4	$55.6M	Hold	3,018,935	–	–	2.08%	14
2024 Q3	$78.4M	Buy	+3,018,935	New	+$69M	2.49%	17

Other funds holding MBX

FLSM

Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

NMC

NEA Management Company Timonium, Maryland $1.59B AUM 234.06% 1-Year Est. Return

OrbiMed New York $5.4B AUM 163.13% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

PBA

Paradigm Biocapital Advisors New York $5.34B AUM 380.18% 1-Year Est. Return

NVP Associates Menlo Park, California $328M AUM 166.51% 1-Year Est. Return

PCH

Polar Capital Holdings London, United Kingdom $42.4B AUM 181.11% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Deep Track Capital's MBX Position: Q2 2026 in Review

Deep Track Capital reduced its MBX Biosciences (MBX) stake by 37% in Q2 2026, selling an estimated $35.8M and leaving 1,732,569 shares worth $95.6M. The position accounts for 1.39% of the portfolio, ranked #29.

Deep Track Capital first reported a position in MBX in Q3 2024 and has held it in 8 quarters since. The position peaked at $102M in Q4 2025. 172 funds tracked by Wall St. Rank hold MBX as of Q2 2026.

Deep Track Capital held 1,732,569 shares of MBX Biosciences worth $95.6M as of Q2 2026.
Deep Track Capital sold 1,025,000 MBX Biosciences shares in Q2 2026, an estimated $35.8M.
MBX Biosciences made up 1.39% of Deep Track Capital's portfolio in Q2 2026, its #29 holding.
Deep Track Capital first reported a position in MBX Biosciences in Q3 2024 and has held it in 8 quarters since.
Deep Track Capital's MBX Biosciences position peaked at $102M in Q4 2025.
172 funds tracked by Wall St. Rank held MBX Biosciences as of Q2 2026.

Based on Deep Track Capital's 13F filing for Q2 2026, filed 14 Aug 2026.