Citigroup
BLLN

Citigroup’s BillionToOne Inc BLLN Stock Holding History

Citigroup’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 		$106K Buy
886
+885
+88,500% +$80.8K ﹤0.01% 4652
2026
Q1 		$79 Hold
1
– – ﹤0.01% 5622
2025
Q4 		$82 Buy
+1
New +$101 ﹤0.01% 5677

Other funds holding BLLN

Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return
WA
Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return
EA
Emerald Advisers Leola, Pennsylvania $4.25B AUM 141.71% 1-Year Est. Return
EMFAT
Emerald Mutual Fund Advisers Trust Leola, Pennsylvania $2.85B AUM 140.52% 1-Year Est. Return
PCM
Penn Capital Management Philadelphia, Pennsylvania $1.58B AUM 81.2% 1-Year Est. Return
New York State Common Retirement Fund
New York State Common Retirement Fund Albany, New York $79.3B AUM 43.63% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
TD Asset Management
TD Asset Management Toronto, Ontario, Canada $115B AUM 41.58% 1-Year Est. Return
FMI
F/M Investments Washington, District of Columbia $1.97B AUM 30.33% 1-Year Est. Return
Universal-Beteiligungs- und Servicegesellschaft
Universal-Beteiligungs- und Servicegesellschaft Frankfurt Am Main, Germany $65.4B AUM 39.83% 1-Year Est. Return

Citigroup's BLLN Position: Q2 2026 in Review

Citigroup increased its BillionToOne Inc (BLLN) stake by 88,500% in Q2 2026, buying an estimated $80.8K and bringing the position to 886 shares worth $106K. The position accounts for ﹤0.01% of the portfolio, ranked #4652.

Citigroup first reported a position in BLLN in Q4 2025 and has held it in 3 quarters since. 44 funds tracked by Wall St. Rank hold BLLN as of Q2 2026.

  • Citigroup held 886 shares of BillionToOne Inc worth $106K as of Q2 2026.
  • Citigroup bought 885 BillionToOne Inc shares in Q2 2026, an estimated $80.8K.
  • BillionToOne Inc made up ﹤0.01% of Citigroup's portfolio in Q2 2026, its #4652 holding.
  • Citigroup first reported a position in BillionToOne Inc in Q4 2025 and has held it in 3 quarters since.
  • 44 funds tracked by Wall St. Rank held BillionToOne Inc as of Q2 2026.

Based on Citigroup's 13F filing for Q2 2026, filed 3 Aug 2026.