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
Q3 2023Renaissance Technologies LLCBuy17,700645,900$64,887
Q3 2023Sequoia Financial AdvisorsSell-552,142$215,189
Q3 2023Parnassus Endeavor FundBuy35,781167,112$16,788,072
Q2 2023ARK InvestBuy563,7911,172,220$130,503,199
Q2 2023Meritage GroupBuy2,2432,243$250
Q2 2023Renaissance Technologies LLCSell-207,800628,200$69,938
Q2 2023Sequoia Financial AdvisorsBuy2222,197$244,596
Q1 2023ARK InvestBuy53,391608,429$65,412,202
Q1 2023Renaissance Technologies LLCSell-319,500836,000$89,878
Q1 2023Sequoia Financial AdvisorsBuy1,9751,975$212,335
Q1 2023Parnassus Endeavor FundSell-34,397131,331$14,119,396
Q4 2022ARK InvestBuy2,720555,038$48,482,569
Q4 2022Renaissance Technologies LLCSell-113,0001,155,500$100,933
Q4 2022Parnassus Endeavor FundBuy116,000165,728$14,476,341
Q4 2022Causeway Capital ManagementBuy238,375238,375$20,822,047
Q3 2022ARK InvestBuy107,432552,318$41,507
Q3 2022Renaissance Technologies LLCBuy573,7091,268,500$95,328
Q2 2022ARK InvestBuy63,693444,886$48,608
Q2 2022Parnassus Endeavor FundSell-152,90349,728$4,453
Q2 2022Renaissance Technologies LLCBuy300,891694,791$62,219
Q1 2022ARK InvestSell-83,253381,193$45,068
Q1 2022Parnassus Endeavor FundBuy48,859202,631$23,957
Q1 2022Renaissance Technologies LLCSell-180,600393,900$46,571
Q4 2021ARK InvestSell-97,383464,446$75,951
Q4 2021Parnassus Endeavor FundBuy153,772153,772$25,146
Q4 2021Renaissance Technologies LLCBuy107,300574,500$93,948
Q3 2021ARK InvestSell-2,222,487561,829$61,335
Q3 2021Renaissance Technologies LLCBuy142,276467,200$51,004
Q2 2021ARK InvestSell-92,7872,784,316$372,987
Q1 2021ARK InvestBuy2,639,0562,877,103$350,086

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.