Fidelity Investments
BLLN

Fidelity Investments’s BillionToOne Inc BLLN Stock Holding History

Fidelity Investments’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 		$840 Buy
+7
New +$639 ﹤0.01% 5259
2026
Q1 		– Sell
-700
Closed -$57.3K – 5650
2025
Q4 		$57.3K Buy
+700
New +$71K ﹤0.01% 4037

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

Fidelity Investments's BLLN Position: Q2 2026 in Review

Fidelity Investments opened a new position in BillionToOne Inc (BLLN) in Q2 2026: 7 shares worth $840. The stake represents ﹤0.01% of the portfolio and ranks #5259 among its holdings. This is a return to the name: Fidelity Investments previously reported a position in BLLN as recently as Q4 2025.

Fidelity Investments first reported a position in BLLN in Q4 2025 and has held it in 2 quarters since. The position peaked at $57.3K in Q4 2025. 156 funds tracked by Wall St. Rank hold BLLN as of Q2 2026.

  • Fidelity Investments held 7 shares of BillionToOne Inc worth $840 as of Q2 2026.
  • BillionToOne Inc was a new Fidelity Investments position in Q2 2026.
  • BillionToOne Inc made up ﹤0.01% of Fidelity Investments's portfolio in Q2 2026, its #5259 holding.
  • Fidelity Investments first reported a position in BillionToOne Inc in Q4 2025 and has held it in 2 quarters since.
  • Fidelity Investments's BillionToOne Inc position peaked at $57.3K in Q4 2025.
  • 156 funds tracked by Wall St. Rank held BillionToOne Inc as of Q2 2026.

Based on Fidelity Investments's 13F filing for Q2 2026, filed 13 Aug 2026.