RF
BLLN

Rossby Financial’s BillionToOne Inc BLLN Stock Holding History

Rossby Financial’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 		$12K Hold
100
– – ﹤0.01% 1127
2026
Q1 		$8.3K Sell
100
-200
-67% -$16.4K ﹤0.01% 1329
2025
Q4 		$24.6K Buy
+300
New +$30.4K 0.01% 686

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

Rossby Financial's BLLN Position: Q2 2026 in Review

Rossby Financial held its BillionToOne Inc (BLLN) position steady in Q2 2026 at 100 shares worth $12K. The position accounts for ﹤0.01% of the portfolio, ranked #1127.

Rossby Financial first reported a position in BLLN in Q4 2025 and has held it in 3 quarters since. The position peaked at $24.6K in Q4 2025. 157 funds tracked by Wall St. Rank hold BLLN as of Q2 2026.

  • Rossby Financial held 100 shares of BillionToOne Inc worth $12K as of Q2 2026.
  • Rossby Financial left its BillionToOne Inc share count unchanged in Q2 2026.
  • BillionToOne Inc made up ﹤0.01% of Rossby Financial's portfolio in Q2 2026, its #1127 holding.
  • Rossby Financial first reported a position in BillionToOne Inc in Q4 2025 and has held it in 3 quarters since.
  • Rossby Financial's BillionToOne Inc position peaked at $24.6K in Q4 2025.
  • 157 funds tracked by Wall St. Rank held BillionToOne Inc as of Q2 2026.

Based on Rossby Financial's 13F filing for Q2 2026, filed 4 Aug 2026.