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Andreas Halvorsen’s Rallybio RLYB Stock Holding History

Andreas Halvorsen’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 		$8.39M Hold
524,347
– – 0.02% 89
2026
Q1 		$4.7M Hold
524,347
– – 0.01% 77
2025
Q4 		$2.88M Hold
524,347
– – 0.01% 76
2025
Q3 		$2.09M Hold
524,347
– – 0.01% 78
2025
Q2 		$1.42M Hold
524,347
– – ﹤0.01% 83
2025
Q1 		$2.75M Hold
524,347
– – 0.01% 89
2024
Q4 		$4.03M Hold
524,347
– – 0.01% 86
2024
Q3 		$4.91M Hold
524,347
– – 0.02% 83
2024
Q2 		$5.62M Hold
524,347
– – 0.02% 82
2024
Q1 		$7.76M Hold
524,347
– – 0.03% 82
2023
Q4 		$10M Hold
524,347
– – 0.04% 77
2023
Q3 		$14.1M Hold
524,347
– – 0.06% 75
2023
Q2 		$23.7M Hold
524,347
– – 0.1% 80
2023
Q1 		$24M Hold
524,347
– – 0.11% 73
2022
Q4 		$27.6M Hold
524,347
– – 0.14% 70
2022
Q3 		$60.7M Hold
524,347
– – 0.28% 66
2022
Q2 		$31.7M Hold
524,347
– – 0.14% 74
2022
Q1 		$29.3M Hold
524,347
– – 0.12% 81
2021
Q4 		$40M Hold
524,347
– – 0.12% 92
2021
Q3 		$73.7M Buy
+524,347
New +$61.5M 0.2% 74

Other funds holding RLYB

ACM
ADAR1 Capital Management Austin, Texas $2.19B AUM 374.99% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 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
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
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
AC
Almitas Capital Santa Monica, California $417M AUM 22.81% 1-Year Est. Return
RC
Rangeley Capital New Canaan, Connecticut $109M AUM 97.13% 1-Year Est. Return

Andreas Halvorsen's RLYB Position: Q2 2026 in Review

Andreas Halvorsen held its Rallybio (RLYB) position steady in Q2 2026 at 524,347 shares worth $8.39M. The position accounts for 0.02% of the portfolio, ranked #89.

Andreas Halvorsen first reported a position in RLYB in Q3 2021 and has held it in 20 quarters since. The position peaked at $73.7M in Q3 2021. 37 funds tracked by Wall St. Rank hold RLYB as of Q2 2026.

  • Andreas Halvorsen held 524,347 shares of Rallybio worth $8.39M as of Q2 2026.
  • Andreas Halvorsen left its Rallybio share count unchanged in Q2 2026.
  • Rallybio made up 0.02% of Andreas Halvorsen's portfolio in Q2 2026, its #89 holding.
  • Andreas Halvorsen first reported a position in Rallybio in Q3 2021 and has held it in 20 quarters since.
  • Andreas Halvorsen's Rallybio position peaked at $73.7M in Q3 2021.
  • 37 funds tracked by Wall St. Rank held Rallybio as of Q2 2026.

Based on Viking Global Investors's 13F filing for Q2 2026, filed 14 Aug 2026.