KIRBY CORP (KEX) Institutional Ownership Changes & 13F Activity

KIRBY CORP (KEX) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Atlantic Investment Management, Sequoia Financial Advisors, Renaissance Technologies LLC, Muhlenkamp & Co, and Thunderbird Partners.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2021Renaissance Technologies LLCSell-298,600116,400$6,916
Q4 2021Muhlenkamp & CoSell-135164,716$9,787
Q3 2021Renaissance Technologies LLCBuy366,766415,000$19,903
Q3 2021Muhlenkamp & CoSell-275164,851$7,906
Q2 2021Thunderbird PartnersSell-179,4241,982,102$120,195
Q2 2021Renaissance Technologies LLCSell-34,26648,234$2,925
Q2 2021Muhlenkamp & CoBuy275165,126$10,013
Q1 2021Thunderbird PartnersBuy591,6742,161,526$130,297
Q1 2021Muhlenkamp & CoSell-52164,851$9,166
Q4 2020Thunderbird PartnersBuy1,569,8521,569,852$81,365
Q4 2020Renaissance Technologies LLCSell-205,90082,500$4,276
Q4 2020Muhlenkamp & CoBuy78,408164,903$8,547
Q3 2020Renaissance Technologies LLCBuy132,201288,400$10,431
Q3 2020Muhlenkamp & CoBuy86,49586,495$3,129
Q1 2020Renaissance Technologies LLCBuy67,599156,199$6,790
Q4 2019Renaissance Technologies LLCSell-6,16788,600$7,932
Q2 2018Turtle Creek Asset ManagementSell-9,8005,000$418
Q1 2018Turtle Creek Asset ManagementSell-3,60014,800$1,139
Q4 2017Turtle Creek Asset ManagementBuy4,00018,400$1,229
Q3 2017Renaissance Technologies LLCSell-1,63394,767$6,250
Q3 2017Turtle Creek Asset ManagementBuy80014,400$950
Q2 2017Turtle Creek Asset ManagementBuy13,60013,600$909
Q4 2016Third Avenue ManagementSell-21,77582,600$5,493
Q3 2016Third Avenue ManagementBuy15,241104,375$6,488
Q1 2016Third Avenue ManagementSell-95,02089,134$5,374
Q4 2015Third Avenue ManagementBuy184,154184,154$9,690
Q4 2015Atlantic Investment ManagementBuy105,301105,301$5,541
Q2 2015Renaissance Technologies LLCSell-427,10096,400$7,390
Q1 2015Renaissance Technologies LLCSell-53,600523,500$39,289
Q4 2014Renaissance Technologies LLCBuy488,300577,100$46,595

Frequently asked questions about KEX activity

  • Which institutional owners are buying KEX?

    Institutional owners buying KEX 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 KEX activity?

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

  • Is institutional interest in KEX increasing?

    Institutional interest in KEX 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.

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