TERADYNE INC (TER) Stock Institutional Trading Activity


TERADYNE INC (TER) 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 Renaissance Technologies LLC, ARK Invest, Parnassus Endeavor Fund, Sequoia Financial Advisors, and Meritage Group. 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
Q1 2021Renaissance Technologies LLCSell-1,131,825324,924$39,537
Q4 2020ARK InvestSell-69,651238,047$28,539
Q4 2020Renaissance Technologies LLCSell-1,986,1001,456,749$174,650
Q3 2020ARK InvestSell-1,445,697307,698$24,450
Q3 2020Renaissance Technologies LLCSell-1,841,8003,442,849$273,569
Q2 2020ARK InvestBuy1,031,3731,753,395$148,179
Q2 2020Renaissance Technologies LLCSell-556,7015,284,649$446,606
Q1 2020ARK InvestBuy67,020722,022$39,112
Q1 2020Renaissance Technologies LLCBuy439,6015,841,350$316,426
Q4 2019ARK InvestSell-300,694655,002$44,665
Q4 2019Renaissance Technologies LLCSell-157,4765,401,749$368,345
Q3 2019ARK InvestSell-376,872955,696$55,344
Q3 2019Vulcan Value PartnersSell-5,135,726774$45
Q3 2019Renaissance Technologies LLCBuy474,4255,559,225$321,935
Q2 2019ARK InvestSell-566,4001,332,568$63,843
Q2 2019Renaissance Technologies LLCBuy985,6005,084,800$243,613
Q2 2019Vulcan Value PartnersSell-2,551,0275,136,500$246,090
Q1 2019ARK InvestSell-691,6201,898,968$75,655
Q1 2019Renaissance Technologies LLCBuy2,336,1004,099,200$163,312
Q1 2019Vulcan Value PartnersSell-4,684,4017,687,527$306,271
Q4 2018ARK InvestBuy859,2222,590,588$81,293
Q4 2018Renaissance Technologies LLCBuy860,8001,763,100$55,326
Q4 2018Vulcan Value PartnersBuy6,751,36012,371,928$388,231
Q3 2018ARK InvestBuy266,4111,731,366$64,026
Q3 2018Renaissance Technologies LLCSell-1,432,800902,300$33,367
Q3 2018Vulcan Value PartnersBuy1,404,8745,620,568$207,849
Q2 2018ARK InvestBuy934,6121,464,955$55,771
Q2 2018Vulcan Value PartnersBuy4,215,6944,215,694$160,491
Q1 2018ARK InvestBuy223,434530,343$24,242
Q1 2018Renaissance Technologies LLCSell-1,851,3592,335,100$106,737

Frequently asked questions about TER activity

  • Which institutional owners are buying TER?

    Institutional owners buying TER 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 TER activity?

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

  • Is institutional interest in TER increasing?

    Institutional interest in TER 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.