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XTX Topco’s Rallybio RLYB Stock Holding History

XTX Topco’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 		$101K Sell
11,226
-938
-8% -$6.41K ﹤0.01% 3101
2025
Q4 		$66.8K Buy
12,164
+4,775
+65% +$24.6K ﹤0.01% 2758
2025
Q3 		$29.5K Buy
7,389
+454
+7% +$1.91K ﹤0.01% 2264
2025
Q2 		$18.8K Buy
+6,935
New +$18.4K ﹤0.01% 2173
2025
Q1 		– Sell
-1,852
Closed -$14.2K – 2993
2024
Q4 		$14.2K Buy
1,852
+21
+1% +$176 ﹤0.01% 2098
2024
Q3 		$17.1K Buy
+1,831
New +$17.6K ﹤0.01% 1865
2024
Q2 		– Sell
-2,849
Closed -$42.2K – 2381
2024
Q1 		$42.2K Buy
+2,849
New +$39.7K 0.01% 1499

Other funds holding RLYB

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Viking Global Investors
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
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
AC
Almitas Capital Santa Monica, California $443M AUM 42.36% 1-Year Est. Return

XTX Topco's RLYB Position: Q1 2026 in Review

XTX Topco reduced its Rallybio (RLYB) stake by 7.7% in Q1 2026, selling an estimated $6.41K and leaving 11,226 shares worth $101K. The position accounts for ﹤0.01% of the portfolio, ranked #3101.

XTX Topco first reported a position in RLYB in Q1 2024 and has held it in 7 quarters since. 38 funds tracked by Wall St. Rank hold RLYB as of Q1 2026.

  • XTX Topco held 11,226 shares of Rallybio worth $101K as of Q1 2026.
  • XTX Topco sold 938 Rallybio shares in Q1 2026, an estimated $6.41K.
  • Rallybio made up ﹤0.01% of XTX Topco's portfolio in Q1 2026, its #3101 holding.
  • XTX Topco first reported a position in Rallybio in Q1 2024 and has held it in 7 quarters since.
  • 38 funds tracked by Wall St. Rank held Rallybio as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.