William Blair & Company
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William Blair & Company’s Union Pacific UNP Stock Holding History

William Blair & Company’s Portfolio UNP Stock Details UNP Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2017
Q3 		– Sell
-200
Closed -$22K – 1513
2017
Q2 		$22K Hold
200
– – ﹤0.01% 1522
2017
Q1 		$21K Buy
+200
New +$21.3K ﹤0.01% 1375

Other funds holding UNP

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

William Blair & Company's UNP Position: Q1 2026 in Review

William Blair & Company increased its Union Pacific (UNP) stake by 9.5% in Q1 2026, buying an estimated $10.9M and bringing the position to 514,829 shares worth $125M. The position accounts for 0.36% of the portfolio, ranked #64.

William Blair & Company first reported a position in UNP in Q2 2013 and has held it in 52 quarters since. The position peaked at $185M in Q2 2013. 2,764 funds tracked by Wall St. Rank hold UNP as of Q1 2026.

  • William Blair & Company held 514,829 shares of Union Pacific worth $125M as of Q1 2026.
  • William Blair & Company bought 44,455 Union Pacific shares in Q1 2026, an estimated $10.9M.
  • Union Pacific made up 0.36% of William Blair & Company's portfolio in Q1 2026, its #64 holding.
  • William Blair & Company first reported a position in Union Pacific in Q2 2013 and has held it in 52 quarters since.
  • William Blair & Company's Union Pacific position peaked at $185M in Q2 2013.
  • 2,764 funds tracked by Wall St. Rank held Union Pacific as of Q1 2026.

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