Vanguard Group
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Vanguard Group’s Rallybio RLYB Stock Holding History

Vanguard Group’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
2025
Q4 		$697K Buy
127,031
+2,078
+2% +$10.7K ﹤0.01% 3865
2025
Q3 		$499K Buy
124,953
+11,210
+10% +$47.1K ﹤0.01% 3946
2025
Q2 		$308K Sell
113,743
-7,748
-6% -$20.5K ﹤0.01% 4019
2025
Q1 		$637K Buy
121,491
+5,801
+5% +$36.7K ﹤0.01% 3827
2024
Q4 		$889K Hold
115,690
– – ﹤0.01% 3801
2024
Q3 		$1.08M Buy
115,690
+8,453
+8% +$81.4K ﹤0.01% 3749
2024
Q2 		$1.15M Sell
107,237
-27,359
-20% -$371K ﹤0.01% 3745
2024
Q1 		$1.99M Buy
134,596
+1,600
+1% +$22.3K ﹤0.01% 3598
2023
Q4 		$2.54M Buy
132,996
+1,767
+1% +$43.2K ﹤0.01% 3516
2023
Q3 		$3.54M Buy
131,229
+1,464
+1% +$63.4K ﹤0.01% 3392
2023
Q2 		$5.88M Buy
129,765
+5,387
+4% +$264K ﹤0.01% 3232
2023
Q1 		$5.68M Buy
124,378
+3,290
+3% +$170K ﹤0.01% 3240
2022
Q4 		$6.36M Buy
121,088
+21,258
+21% +$1.25M ﹤0.01% 3183
2022
Q3 		$11.6M Buy
99,830
+12,766
+15% +$1.14M ﹤0.01% 2881
2022
Q2 		$5.26M Sell
87,064
-1,692
-2% -$127K ﹤0.01% 3358
2022
Q1 		$4.96M Buy
88,756
+48,771
+122% +$4.04M ﹤0.01% 3537
2021
Q4 		$3.05M Sell
39,985
-8,851
-18% -$1.03M ﹤0.01% 3870
2021
Q3 		$6.87M Buy
+48,836
New +$5.73M ﹤0.01% 3467

Other funds holding RLYB

AIIC
AJU IB Investment Company Seoul, South Korea $30.5M AUM 128.96% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return
JJ
Johnson & Johnson New Brunswick, New Jersey $799M AUM 253.51% 1-Year Est. Return
5VM
5AM Venture Management San Francisco, California $360M AUM 345.76% 1-Year Est. Return
TGA
TPG GP A Fort Worth, Texas $3.68B AUM 14.99% 1-Year Est. Return
PBPIA
Pivotal bioVenture Partners Investment Advisor San Francisco, California $280M AUM 181.4% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
AC
Almitas Capital Santa Monica, California $443M AUM 42.36% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
CPX
Canaan Partners XI Menlo Park, California $127M AUM 217.49% 1-Year Est. Return

Vanguard Group's RLYB Position: Q4 2025 in Review

Vanguard Group increased its Rallybio (RLYB) stake by 1.7% in Q4 2025, buying an estimated $10.7K and bringing the position to 127,031 shares worth $697K. The position accounts for ﹤0.01% of the portfolio, ranked #3865.

Vanguard Group first reported a position in RLYB in Q3 2021 and has held it in 18 quarters since. The position peaked at $11.6M in Q3 2022. 46 funds tracked by Wall St. Rank hold RLYB as of Q4 2025.

  • Vanguard Group held 127,031 shares of Rallybio worth $697K as of Q4 2025.
  • Vanguard Group bought 2,078 Rallybio shares in Q4 2025, an estimated $10.7K.
  • Rallybio made up ﹤0.01% of Vanguard Group's portfolio in Q4 2025, its #3865 holding.
  • Vanguard Group first reported a position in Rallybio in Q3 2021 and has held it in 18 quarters since.
  • Vanguard Group's Rallybio position peaked at $11.6M in Q3 2022.
  • 46 funds tracked by Wall St. Rank held Rallybio as of Q4 2025.

Based on Vanguard Group's 13F filing for Q4 2025, filed 29 Jan 2026.