Baillie Gifford & Co
BLLN

Baillie Gifford & Co’s BillionToOne Inc BLLN Stock Holding History

Baillie Gifford & Co’s Portfolio BLLN Stock Details BLLN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$99.5M Sell
1,259,993
-8,170
-0.6% -$669K 0.1% 119
2025
Q4 		$104M Buy
+1,268,163
New +$129M 0.09% 125

Other funds holding BLLN

ASP
Adams Street Partners Chicago, Illinois $260M AUM 30.38% 1-Year Est. Return
CVM
Civilization Ventures Management Belvedere Tiburon, California $87.9M AUM
BAMCO Inc
BAMCO Inc New York $33.1B AUM 11.16% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
NA
NVP Associates Menlo Park, California $176M AUM 208.78% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $131B AUM 28.36% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
WA
Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return

Baillie Gifford & Co's BLLN Position: Q1 2026 in Review

Baillie Gifford & Co reduced its BillionToOne Inc (BLLN) stake by 0.64% in Q1 2026, selling an estimated $669K and leaving 1,259,993 shares worth $99.5M. The position accounts for 0.1% of the portfolio, ranked #119.

Baillie Gifford & Co first reported a position in BLLN in Q4 2025 and has held it in 2 quarters since. The position peaked at $104M in Q4 2025. 91 funds tracked by Wall St. Rank hold BLLN as of Q1 2026.

  • Baillie Gifford & Co held 1,259,993 shares of BillionToOne Inc worth $99.5M as of Q1 2026.
  • Baillie Gifford & Co sold 8,170 BillionToOne Inc shares in Q1 2026, an estimated $669K.
  • BillionToOne Inc made up 0.1% of Baillie Gifford & Co's portfolio in Q1 2026, its #119 holding.
  • Baillie Gifford & Co first reported a position in BillionToOne Inc in Q4 2025 and has held it in 2 quarters since.
  • Baillie Gifford & Co's BillionToOne Inc position peaked at $104M in Q4 2025.
  • 91 funds tracked by Wall St. Rank held BillionToOne Inc as of Q1 2026.

Based on Baillie Gifford & Co's 13F filing for Q1 2026, filed 8 May 2026.