TRANSDIGM GROUP INC (TDG) Stock Institutional Trading Activity


TRANSDIGM GROUP INC (TDG) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Lone Pine Capital, Triple Frond Partners, Vulcan Value Partners, AltaRock Partners, and Renaissance Technologies LLC. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q3 2024Vulcan Value PartnersSell-25,454195,116$278,455,887
Q3 2024AltaRock PartnersSell-25,0001,048,264$1,496,009,002
Q2 2024Triple Frond PartnersSell-40,44362,239$79,517
Q2 2024Vulcan Value PartnersSell-117,155220,570$281,634
Q2 2024Sequoia Financial AdvisorsSell-4326,195$7,914,779
Q2 2024Renaissance Technologies LLCBuy3,40086,600$110,641,026
Q2 2024Meritage GroupBuy1,251146,166$186,743,143
Q2 2024AltaRock PartnersSell-83,1341,073,264$1,371,212,819
Q1 2024Renaissance Technologies LLCSell-54,00083,200$102,469
Q1 2024Triple Frond PartnersSell-17,300102,682$126,463
Q1 2024Meritage GroupSell-143,399144,915$178,477
Q1 2024Vulcan Value PartnersSell-49,639337,725$415,751
Q1 2024Sequoia Financial AdvisorsSell-7776,627$8,161,873
Q1 2024Oakcliff Capital PartnersSell-2,88421,424$26,385,798
Q1 2024AltaRock PartnersSell-81,2241,156,398$1,424,219,777
Q4 2023Triple Frond PartnersSell-9,018119,982$121,374
Q4 2023Renaissance Technologies LLCBuy42,400137,200$138,792
Q4 2023Meritage GroupBuy1,374288,314$291,658
Q4 2023Vulcan Value PartnersSell-45,384387,364$391,609
Q4 2023Sequoia Financial AdvisorsBuy9627,404$7,489,935
Q4 2023AltaRock PartnersSell-72,4641,237,622$1,251,978,415
Q3 2023Renaissance Technologies LLCSell-3,00094,800$79,929
Q3 2023Meritage GroupSell-54,463286,940$241,928
Q3 2023Vulcan Value PartnersSell-194,090432,748$364,613
Q3 2023Sequoia Financial AdvisorsBuy176,442$5,431,444
Q3 2023Oakcliff Capital PartnersSell-8,09024,308$20,494,804
Q3 2023Lone Pine CapitalSell-146,246436,740$368,228,596
Q3 2023AltaRock PartnersSell-47,4051,310,086$1,104,572,809
Q2 2023Renaissance Technologies LLCBuy13,50097,800$87,450
Q2 2023Meritage GroupSell-4,443341,403$305,272

Frequently asked questions about TDG activity

  • Which institutional owners are buying TDG?

    Institutional owners buying TDG include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in TDG activity?

    "Buy" means an investor increased their reported position in TDG compared to the prior reporting period. This reflects growing exposure to TRANSDIGM GROUP INC (TDG) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in TDG increasing?

    Institutional interest in TDG can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.