T. Rowe Price Investment Management
BLLN

T. Rowe Price Investment Management’s BillionToOne Inc BLLN Stock Holding History

T. Rowe Price Investment Management’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 		$11.2M Buy
+92,957
New +$8.49M 0.01% 608
2026
Q1 		– Sell
-101,136
Closed -$8.28M – 966
2025
Q4 		$8.28M Buy
+101,136
New +$10.3M 0.01% 563

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

T. Rowe Price Investment Management's BLLN Position: Q2 2026 in Review

T. Rowe Price Investment Management opened a new position in BillionToOne Inc (BLLN) in Q2 2026: 92,957 shares worth $11.2M. The stake represents 0.01% of the portfolio and ranks #608 among its holdings. This is a return to the name: T. Rowe Price Investment Management previously reported a position in BLLN as recently as Q4 2025.

T. Rowe Price Investment Management first reported a position in BLLN in Q4 2025 and has held it in 2 quarters since. 157 funds tracked by Wall St. Rank hold BLLN as of Q2 2026.

  • T. Rowe Price Investment Management held 92,957 shares of BillionToOne Inc worth $11.2M as of Q2 2026.
  • BillionToOne Inc was a new T. Rowe Price Investment Management position in Q2 2026.
  • BillionToOne Inc made up 0.01% of T. Rowe Price Investment Management's portfolio in Q2 2026, its #608 holding.
  • T. Rowe Price Investment Management first reported a position in BillionToOne Inc in Q4 2025 and has held it in 2 quarters since.
  • 157 funds tracked by Wall St. Rank held BillionToOne Inc as of Q2 2026.

Based on T. Rowe Price Investment Management's 13F filing for Q2 2026, filed 14 Aug 2026.