William Blair Investment Management
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William Blair Investment Management’s Birkenstock BIRK Stock Holding History

William Blair Investment Management’s Portfolio BIRK Stock Details BIRK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$123M Buy
2,865,895
+290,493
+11% +$11.7M 0.37% 80
2026
Q1 		$92.3M Buy
+2,575,402
New +$100M 0.3% 92

Other funds holding BIRK

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BAMCO Inc
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T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $30.6B AUM 61.81% 1-Year Est. Return

William Blair Investment Management's BIRK Position: Q2 2026 in Review

William Blair Investment Management increased its Birkenstock (BIRK) stake by 11% in Q2 2026, buying an estimated $11.7M and bringing the position to 2,865,895 shares worth $123M. The position accounts for 0.37% of the portfolio, ranked #80.

William Blair Investment Management first reported a position in BIRK in Q1 2026 and has held it in 2 quarters since. 235 funds tracked by Wall St. Rank hold BIRK as of Q2 2026.

  • William Blair Investment Management held 2,865,895 shares of Birkenstock worth $123M as of Q2 2026.
  • William Blair Investment Management bought 290,493 Birkenstock shares in Q2 2026, an estimated $11.7M.
  • Birkenstock made up 0.37% of William Blair Investment Management's portfolio in Q2 2026, its #80 holding.
  • William Blair Investment Management first reported a position in Birkenstock in Q1 2026 and has held it in 2 quarters since.
  • 235 funds tracked by Wall St. Rank held Birkenstock as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.