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 2018Tiger Global ManagementSell-590,5001,844,000$686,521
Q2 2018Triple Frond PartnersSell-35,300205,698$70,995
Q2 2018Meritage GroupBuy3,002541,540$186,907
Q2 2018Lone Pine CapitalBuy351,4111,761,813$608,072
Q2 2018Tiger Global ManagementSell-331,0002,434,500$840,243
Q1 2018Triple Frond PartnersSell-149,000240,998$73,972
Q1 2018AltaRock PartnersSell-45,100534,431$164,038
Q1 2018Meritage GroupBuy338538,538$165,299
Q1 2018Viking Global InvestorsBuy473,6411,048,958$321,967
Q1 2018Tiger Global ManagementBuy845,8952,765,500$848,843
Q4 2017Triple Frond PartnersSell-90,000389,998$107,101
Q4 2017Meritage GroupBuy99,023538,200$147,800
Q4 2017Viking Global InvestorsBuy41,457575,317$157,994
Q4 2017AltaRock PartnersSell-67,000579,531$159,151
Q4 2017Lone Pine CapitalSell-617,9901,410,402$387,325
Q4 2017Tiger Global ManagementSell-1,340,3951,919,605$527,162
Q3 2017Sequoia Financial AdvisorsBuy7191,769$452
Q3 2017Oakcliff Capital PartnersSell-62149,106$12,553
Q3 2017AltaRock PartnersBuy74,367646,531$165,286
Q3 2017Tiger Global ManagementSell-740,0003,260,000$833,419
Q2 2017Meritage GroupBuy439,177439,177$118,082
Q2 2017Viking Global InvestorsSell-567,450533,860$143,539
Q2 2017AltaRock PartnersBuy36,094572,164$153,838
Q2 2017Tiger Global ManagementBuy1,459,2724,000,000$1,075,480
Q2 2017Hancock Classic ValueSell-328758$204
Q1 2017Sequoia Financial AdvisorsBuy1001,050$231
Q1 2017Oakcliff Capital PartnersBuy49,72749,727$10,948
Q1 2017Triple Frond PartnersBuy150,850479,998$105,676
Q1 2017AltaRock PartnersSell-55,434536,070$118,021
Q1 2017Tiger Global ManagementBuy2,111,9572,540,728$559,367

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.