BlackRock
BLLN

BlackRock’s BillionToOne Inc BLLN Stock Holding History

BlackRock’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
Q2 		$13.7M Buy
114,281
+19,121
+20% +$1.75M ﹤0.01% 3502
2026
Q1 		$7.51M Buy
95,160
+23,760
+33% +$1.94M ﹤0.01% 3662
2025
Q4 		$5.84M Buy
+71,400
New +$7.24M ﹤0.01% 3769

Other funds holding BLLN

ASP
Adams Street Partners Chicago, Illinois $443M AUM 49.46% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $66.6B AUM 7.35% 1-Year Est. Return
WA
Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

BlackRock's BLLN Position: Q2 2026 in Review

BlackRock increased its BillionToOne Inc (BLLN) stake by 20% in Q2 2026, buying an estimated $1.75M and bringing the position to 114,281 shares worth $13.7M. The position accounts for ﹤0.01% of the portfolio, ranked #3502.

BlackRock first reported a position in BLLN in Q4 2025 and has held it in 3 quarters since. 156 funds tracked by Wall St. Rank hold BLLN as of Q2 2026.

  • BlackRock held 114,281 shares of BillionToOne Inc worth $13.7M as of Q2 2026.
  • BlackRock bought 19,121 BillionToOne Inc shares in Q2 2026, an estimated $1.75M.
  • BillionToOne Inc made up ﹤0.01% of BlackRock's portfolio in Q2 2026, its #3502 holding.
  • BlackRock first reported a position in BillionToOne Inc in Q4 2025 and has held it in 3 quarters since.
  • 156 funds tracked by Wall St. Rank held BillionToOne Inc as of Q2 2026.

Based on BlackRock's 13F filing for Q2 2026, filed 7 Aug 2026.