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 Q2	$809K	Hold	50,566	–	–	﹤0.01%	2115
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

ACM

ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return

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

Viking Global Investors Stamford, Connecticut $35.1B AUM 21.36% 1-Year Est. Return

TGA

TPG GP A Fort Worth, Texas $5B AUM 58.56% 1-Year Est. Return

PBPIA

Pivotal bioVenture Partners Investment Advisor San Francisco, California $308M AUM 120.89% 1-Year Est. Return

Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return

NCM

Nantahala Capital Management New Canaan, Connecticut $3.01B AUM 119.46% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Almitas Capital Santa Monica, California $417M AUM 22.81% 1-Year Est. Return

Rangeley Capital New Canaan, Connecticut $109M AUM 97.13% 1-Year Est. Return

Mariner's RLYB Position: Q2 2026 in Review

Mariner held its Rallybio (RLYB) position steady in Q2 2026 at 50,566 shares worth $809K. The position accounts for ﹤0.01% of the portfolio, ranked #2115.

Mariner first reported a position in RLYB in Q3 2022 and has held it in 16 quarters since. The position peaked at $3.43M in Q2 2023. 37 funds tracked by Wall St. Rank hold RLYB as of Q2 2026.

Mariner held 50,566 shares of Rallybio worth $809K as of Q2 2026.
Mariner left its Rallybio share count unchanged in Q2 2026.
Rallybio made up ﹤0.01% of Mariner's portfolio in Q2 2026, its #2115 holding.
Mariner first reported a position in Rallybio in Q3 2022 and has held it in 16 quarters since.
Mariner's Rallybio position peaked at $3.43M in Q2 2023.
37 funds tracked by Wall St. Rank held Rallybio as of Q2 2026.

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