William Blair & Company
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William Blair & Company’s TransDigm Group TDG Stock Holding History

William Blair & Company’s Portfolio TDG Stock Details TDG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2017
Q3 		– Sell
-300
Closed -$81K – 1500
2017
Q2 		$81K Hold
300
– – ﹤0.01% 1436
2017
Q1 		$66K Hold
300
– – ﹤0.01% 1317
2016
Q4 		$74K Buy
+300
New +$78.8K ﹤0.01% 1238

Other funds holding TDG

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BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $204B AUM 27.99% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

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

William Blair & Company reduced its TransDigm Group (TDG) stake by 0.77% in Q2 2026, selling an estimated $1.58M and leaving 164,960 shares worth $220M. The position accounts for 0.57% of the portfolio, ranked #41.

William Blair & Company first reported a position in TDG in Q2 2013 and has held it in 53 quarters since. The position peaked at $305M in Q1 2014. 1,144 funds tracked by Wall St. Rank hold TDG as of Q2 2026.

  • William Blair & Company held 164,960 shares of TransDigm Group worth $220M as of Q2 2026.
  • William Blair & Company sold 1,288 TransDigm Group shares in Q2 2026, an estimated $1.58M.
  • TransDigm Group made up 0.57% of William Blair & Company's portfolio in Q2 2026, its #41 holding.
  • William Blair & Company first reported a position in TransDigm Group in Q2 2013 and has held it in 53 quarters since.
  • William Blair & Company's TransDigm Group position peaked at $305M in Q1 2014.
  • 1,144 funds tracked by Wall St. Rank held TransDigm Group as of Q2 2026.

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