William Blair & Company
ONON icon

William Blair & Company’s On Holding ONON Stock Holding History

William Blair & Company’s Portfolio ONON Stock Details ONON Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$828K Buy
23,390
+555
+2% +$20.3K ﹤0.01% 1049
2026
Q1 		$777K Sell
22,835
-230,908
-91% -$10.1M ﹤0.01% 1020
2025
Q4 		$11.8M Buy
+253,743
New +$10.9M 0.03% 328
2024
Q4 		– Sell
-14,517
Closed -$728K – 1866
2024
Q3 		$728K Buy
14,517
+200
+1% +$8.58K ﹤0.01% 1004
2024
Q2 		$556K Buy
14,317
+120
+0.8% +$4.38K ﹤0.01% 1061
2024
Q1 		$502K Buy
+14,197
New +$434K ﹤0.01% 1088

Other funds holding ONON

Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $66.6B AUM 7.35% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
LPC
Lone Pine Capital Greenwich, Connecticut $16.4B AUM 99.7% 1-Year Est. Return
PPI
Platinum Paramount Investment Nassau $704M AUM
SIIL
Sinvest Investments II Ltd Nassau, New Providence $298M AUM
Sands Capital Management
Sands Capital Management Arlington, Virginia $26.9B AUM 34.44% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return

William Blair & Company's ONON Position: Q2 2026 in Review

William Blair & Company increased its On Holding (ONON) stake by 2.4% in Q2 2026, buying an estimated $20.3K and bringing the position to 23,390 shares worth $828K. The position accounts for ﹤0.01% of the portfolio, ranked #1049.

William Blair & Company first reported a position in ONON in Q1 2024 and has held it in 6 quarters since. The position peaked at $11.8M in Q4 2025. 491 funds tracked by Wall St. Rank hold ONON as of Q2 2026.

  • William Blair & Company held 23,390 shares of On Holding worth $828K as of Q2 2026.
  • William Blair & Company bought 555 On Holding shares in Q2 2026, an estimated $20.3K.
  • On Holding made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1049 holding.
  • William Blair & Company first reported a position in On Holding in Q1 2024 and has held it in 6 quarters since.
  • William Blair & Company's On Holding position peaked at $11.8M in Q4 2025.
  • 491 funds tracked by Wall St. Rank held On Holding as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.