William Blair Investment Management
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William Blair Investment Management’s Kirby Corp KEX Stock Holding History

William Blair Investment Management’s Portfolio KEX Stock Details KEX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$25M Sell
187,892
-116,319
-38% -$14.7M 0.08% 226
2025
Q4 		$33.5M Sell
304,211
-31,446
-9% -$3.2M 0.09% 184
2025
Q3 		$28M Buy
335,657
+46,287
+16% +$4.65M 0.07% 229
2025
Q2 		$32.8M Buy
+289,370
New +$30.4M 0.09% 185

Other funds holding KEX

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Neuberger Berman Group
Neuberger Berman Group New York $131B AUM 28.36% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Luther King Capital Management (LKCM)
Luther King Capital Management (LKCM) Fort Worth, Texas $23.1B AUM 21.31% 1-Year Est. Return

William Blair Investment Management's KEX Position: Q1 2026 in Review

William Blair Investment Management reduced its Kirby Corp (KEX) stake by 38% in Q1 2026, selling an estimated $14.7M and leaving 187,892 shares worth $25M. The position accounts for 0.08% of the portfolio, ranked #226.

William Blair Investment Management first reported a position in KEX in Q2 2025 and has held it in 4 quarters since. The position peaked at $33.5M in Q4 2025. 432 funds tracked by Wall St. Rank hold KEX as of Q1 2026.

  • William Blair Investment Management held 187,892 shares of Kirby Corp worth $25M as of Q1 2026.
  • William Blair Investment Management sold 116,319 Kirby Corp shares in Q1 2026, an estimated $14.7M.
  • Kirby Corp made up 0.08% of William Blair Investment Management's portfolio in Q1 2026, its #226 holding.
  • William Blair Investment Management first reported a position in Kirby Corp in Q2 2025 and has held it in 4 quarters since.
  • William Blair Investment Management's Kirby Corp position peaked at $33.5M in Q4 2025.
  • 432 funds tracked by Wall St. Rank held Kirby Corp as of Q1 2026.

Based on William Blair Investment Management's 13F filing for Q1 2026, filed 8 May 2026.