Mariner’s Rallybio RLYB Stock Holding History

Mariner’s Portfolio RLYB Stock Details RLYB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$454K	Sell	50,566 -2	-0%	-$14	﹤0.01%	2564
2025 Q4	$278K	Hold	50,568	–	–	﹤0.01%	2911
2025 Q3	$202K	Hold	50,568	–	–	﹤0.01%	3170
2025 Q2	$137K	Hold	50,568	–	–	﹤0.01%	3172
2025 Q1	$265K	Hold	50,568	–	–	﹤0.01%	2744
2024 Q4	$388K	Sell	50,568 -136	-0.3%	-$1.14K	﹤0.01%	2391
2024 Q3	$475K	Hold	50,704	–	–	﹤0.01%	2164
2024 Q2	$544K	Hold	50,704	–	–	﹤0.01%	1987
2024 Q1	$750K	Buy	50,704 +122	+0.2%	+$1.7K	﹤0.01%	1722
2023 Q4	$967K	Sell	50,582 -441	-0.9%	-$10.8K	﹤0.01%	1451
2023 Q3	$1.38M	Sell	51,023 -24,787	-33%	-$1.07M	﹤0.01%	1159
2023 Q2	$3.43M	Buy	75,810 +73,570	+3,284%	+$3.6M	0.01%	779
2023 Q1	$102K	Buy	2,240 +26	+1%	+$1.34K	﹤0.01%	2574
2022 Q4	$116K	Sell	2,214 -357	-14%	-$21.1K	﹤0.01%	2489
2022 Q3	$298K	Buy	+2,571	New	+$229K	﹤0.01%	1774

Other funds holding RLYB

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

Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return

CAM

Cormorant Asset Management Boston, Massachusetts $1.99B AUM 737.95% 1-Year Est. Return

TGA

TPG GP A Fort Worth, Texas $3.68B AUM 14.99% 1-Year Est. Return

Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return

LCM

Laurion Capital Management New York $2.29B AUM 75.73% 1-Year Est. Return

NCM

Nantahala Capital Management New Canaan, Connecticut $2.72B AUM 121.58% 1-Year Est. Return

PBPIA

Pivotal bioVenture Partners Investment Advisor San Francisco, California $280M AUM 181.4% 1-Year Est. Return

5VM

5AM Venture Management San Francisco, California $360M AUM 345.76% 1-Year Est. Return

Almitas Capital Santa Monica, California $443M AUM 42.36% 1-Year Est. Return

Mariner's RLYB Position: Q1 2026 in Review

Mariner reduced its Rallybio (RLYB) stake by 0% in Q1 2026, selling an estimated $14 and leaving 50,566 shares worth $454K. The position accounts for ﹤0.01% of the portfolio, ranked #2564.

Mariner first reported a position in RLYB in Q3 2022 and has held it in 15 quarters since. The position peaked at $3.43M in Q2 2023. 38 funds tracked by Wall St. Rank hold RLYB as of Q1 2026.

Mariner held 50,566 shares of Rallybio worth $454K as of Q1 2026.
Mariner sold 2 Rallybio shares in Q1 2026, an estimated $14.
Rallybio made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #2564 holding.
Mariner first reported a position in Rallybio in Q3 2022 and has held it in 15 quarters since.
Mariner's Rallybio position peaked at $3.43M in Q2 2023.
38 funds tracked by Wall St. Rank held Rallybio as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.