XT
BLLN

XTX Topco’s BillionToOne Inc BLLN Stock Holding History

XTX Topco’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 		$1.04M Sell
13,179
-7,499
-36% -$614K 0.02% 1379
2025
Q4 		$1.69M Buy
+20,678
New +$2.1M 0.04% 674

Other funds holding BLLN

ASP
Adams Street Partners Chicago, Illinois $260M AUM 30.38% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 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

XTX Topco's BLLN Position: Q1 2026 in Review

XTX Topco reduced its BillionToOne Inc (BLLN) stake by 36% in Q1 2026, selling an estimated $614K and leaving 13,179 shares worth $1.04M. The position accounts for 0.02% of the portfolio, ranked #1379.

XTX Topco first reported a position in BLLN in Q4 2025 and has held it in 2 quarters since. The position peaked at $1.69M in Q4 2025. 91 funds tracked by Wall St. Rank hold BLLN as of Q1 2026.

  • XTX Topco held 13,179 shares of BillionToOne Inc worth $1.04M as of Q1 2026.
  • XTX Topco sold 7,499 BillionToOne Inc shares in Q1 2026, an estimated $614K.
  • BillionToOne Inc made up 0.02% of XTX Topco's portfolio in Q1 2026, its #1379 holding.
  • XTX Topco first reported a position in BillionToOne Inc in Q4 2025 and has held it in 2 quarters since.
  • XTX Topco's BillionToOne Inc position peaked at $1.69M in Q4 2025.
  • 91 funds tracked by Wall St. Rank held BillionToOne Inc as of Q1 2026.

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