JO
BLLN

John Overdeck’s BillionToOne Inc BLLN Stock Holding History

John Overdeck’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 		$3.62M Sell
30,176
-52,600
-64% -$4.8M ﹤0.01% 2464
2026
Q1 		$6.53M Buy
+82,776
New +$6.78M 0.01% 1758

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

John Overdeck's BLLN Position: Q2 2026 in Review

John Overdeck reduced its BillionToOne Inc (BLLN) stake by 64% in Q2 2026, selling an estimated $4.8M and leaving 30,176 shares worth $3.62M. The position accounts for ﹤0.01% of the portfolio, ranked #2464.

John Overdeck first reported a position in BLLN in Q1 2026 and has held it in 2 quarters since. The position peaked at $6.53M in Q1 2026. 157 funds tracked by Wall St. Rank hold BLLN as of Q2 2026.

  • John Overdeck held 30,176 shares of BillionToOne Inc worth $3.62M as of Q2 2026.
  • John Overdeck sold 52,600 BillionToOne Inc shares in Q2 2026, an estimated $4.8M.
  • BillionToOne Inc made up ﹤0.01% of John Overdeck's portfolio in Q2 2026, its #2464 holding.
  • John Overdeck first reported a position in BillionToOne Inc in Q1 2026 and has held it in 2 quarters since.
  • John Overdeck's BillionToOne Inc position peaked at $6.53M in Q1 2026.
  • 157 funds tracked by Wall St. Rank held BillionToOne Inc as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.