William Blair Investment Management
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William Blair Investment Management’s ABM Industries ABM Stock Holding History

William Blair Investment Management’s Portfolio ABM Stock Details ABM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$18.8M Buy
487,701
+16,581
+4% +$717K 0.06% 261
2025
Q4 		$19.9M Sell
471,120
-211,245
-31% -$9.28M 0.06% 272
2025
Q3 		$31.5M Sell
682,365
-41,347
-6% -$1.96M 0.08% 208
2025
Q2 		$34.2M Sell
723,712
-59,098
-8% -$2.86M 0.09% 177
2025
Q1 		$37.1M Sell
782,810
-36,000
-4% -$1.85M 0.1% 174
2024
Q4 		$41.9M Buy
818,810
+19,783
+2% +$1.08M 0.1% 175
2024
Q3 		$42.2M Sell
799,027
-25,664
-3% -$1.36M 0.1% 157
2024
Q2 		$41.7M Sell
824,691
-1,822
-0.2% -$85K 0.11% 155
2024
Q1 		$36.9M Sell
826,513
-570
-0.1% -$23.9K 0.1% 199
2023
Q4 		$37.1M Sell
827,083
-16,289
-2% -$688K 0.11% 185
2023
Q3 		$33.7M Sell
843,372
-59,261
-7% -$2.57M 0.11% 178
2023
Q2 		$38.5M Buy
902,633
+16,649
+2% +$721K 0.12% 169
2023
Q1 		$39.8M Buy
885,984
+2,359
+0.3% +$109K 0.14% 151
2022
Q4 		$39.3M Sell
883,625
-33,415
-4% -$1.47M 0.15% 143
2022
Q3 		$35.1M Sell
917,040
-16,285
-2% -$713K 0.14% 156
2022
Q2 		$40.5M Sell
933,325
-29,189
-3% -$1.35M 0.15% 151
2022
Q1 		$44.3M Sell
962,514
-11,702
-1% -$509K 0.13% 168
2021
Q4 		$39.8M Buy
974,216
+212,300
+28% +$9.59M 0.11% 212
2021
Q3 		$34.3M Buy
761,916
+760,336
+48,123% +$35.2M 0.1% 243
2021
Q2 		$70K Buy
+1,580
New +$79.3K ﹤0.01% 428
2015
Q4 		– Sell
-692,658
Closed -$18.9M – 445
2015
Q3 		$18.9M Buy
+692,658
New +$21.9M 0.04% 534

Other funds holding ABM

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Harris Associates
Harris Associates Chicago, Illinois $75B AUM 11.27% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Nordea Investment Management
Nordea Investment Management Stockholm, Sweden $107B AUM 24.58% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $46.4B AUM 27.74% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return

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

William Blair Investment Management increased its ABM Industries (ABM) stake by 3.5% in Q1 2026, buying an estimated $717K and bringing the position to 487,701 shares worth $18.8M. The position accounts for 0.06% of the portfolio, ranked #261.

William Blair Investment Management first reported a position in ABM in Q3 2015 and has held it in 21 quarters since. The position peaked at $44.3M in Q1 2022. 287 funds tracked by Wall St. Rank hold ABM as of Q1 2026.

  • William Blair Investment Management held 487,701 shares of ABM Industries worth $18.8M as of Q1 2026.
  • William Blair Investment Management bought 16,581 ABM Industries shares in Q1 2026, an estimated $717K.
  • ABM Industries made up 0.06% of William Blair Investment Management's portfolio in Q1 2026, its #261 holding.
  • William Blair Investment Management first reported a position in ABM Industries in Q3 2015 and has held it in 21 quarters since.
  • William Blair Investment Management's ABM Industries position peaked at $44.3M in Q1 2022.
  • 287 funds tracked by Wall St. Rank held ABM Industries as of Q1 2026.

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