William Blair Investment Management
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William Blair Investment Management’s ESCO Technologies ESE Stock Holding History

William Blair Investment Management’s Portfolio ESE Stock Details ESE Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-97,783
Closed -$19.1M – 430
2025
Q4 		$19.1M Sell
97,783
-9,718
-9% -$2.05M 0.05% 277
2025
Q3 		$22.7M Sell
107,501
-72,381
-40% -$14.3M 0.06% 277
2025
Q2 		$34.5M Sell
179,882
-13,831
-7% -$2.36M 0.09% 175
2025
Q1 		$30.8M Sell
193,713
-65,016
-25% -$9.74M 0.09% 214
2024
Q4 		$34.5M Sell
258,729
-35,917
-12% -$4.88M 0.08% 215
2024
Q3 		$38M Buy
+294,646
New +$34.7M 0.09% 179
2021
Q3 		– Sell
-7,268
Closed -$682K – 458
2021
Q2 		$682K Sell
7,268
-243,845
-97% -$24.6M ﹤0.01% 352
2021
Q1 		$27.3M Sell
251,113
-22,519
-8% -$2.38M 0.09% 192
2020
Q4 		$28.2M Sell
273,632
-34,151
-11% -$3.22M 0.09% 177
2020
Q3 		$24.8M Buy
307,783
+17,675
+6% +$1.52M 0.1% 173
2020
Q2 		$24.5M Buy
290,108
+42,910
+17% +$3.39M 0.1% 173
2020
Q1 		$18.8M Buy
247,198
+106,678
+76% +$9.74M 0.09% 182
2019
Q4 		$13M Sell
140,520
-292,780
-68% -$25M 0.05% 252
2019
Q3 		$34.5M Buy
433,300
+43,732
+11% +$3.48M 0.15% 138
2019
Q2 		$32.2M Sell
389,568
-28,121
-7% -$2.06M 0.14% 149
2019
Q1 		$28M Buy
417,689
+57,742
+16% +$3.87M 0.12% 155
2018
Q4 		$23.7M Buy
359,947
+127,525
+55% +$8.28M 0.12% 174
2018
Q3 		$15.8M Buy
232,422
+29,184
+14% +$1.89M 0.05% 293
2018
Q2 		$11.7M Buy
203,238
+16,870
+9% +$969K 0.04% 314
2018
Q1 		$10.9M Buy
186,368
+133
+0.1% +$8.17K 0.04% 302
2017
Q4 		$11.2M Sell
186,235
-126,557
-40% -$7.69M 0.04% 296
2017
Q3 		$18.8M Buy
312,792
+126,156
+68% +$7.29M 0.07% 260
2017
Q2 		$11.1M Buy
186,636
+17,605
+10% +$1.03M 0.04% 303
2017
Q1 		$9.82M Sell
169,031
-59,917
-26% -$3.36M 0.04% 308
2016
Q4 		$13M Sell
228,948
-3,960
-2% -$202K 0.05% 290
2016
Q3 		$10.8M Buy
232,908
+14,336
+7% +$632K 0.04% 308
2016
Q2 		$8.73M Sell
218,572
-1,946
-0.9% -$76.3K 0.03% 314
2016
Q1 		$8.6M Buy
+220,518
New +$7.81M 0.03% 303

Other funds holding ESE

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
GCM
Geneva Capital Management Milwaukee, Wisconsin $4.36B AUM 17.81% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return

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

William Blair Investment Management sold out of ESCO Technologies (ESE) in Q1 2026, closing a stake of 97,783 shares — an estimated $19.1M sold.

William Blair Investment Management first reported a position in ESE in Q1 2016 and held it in 28 quarters. The position peaked at $38M in Q3 2024. 433 funds tracked by Wall St. Rank hold ESE as of Q1 2026.

  • William Blair Investment Management reported no remaining ESCO Technologies position as of Q1 2026 after selling out during the quarter.
  • William Blair Investment Management sold 97,783 ESCO Technologies shares in Q1 2026, an estimated $19.1M.
  • William Blair Investment Management first reported a position in ESCO Technologies in Q1 2016 and held it in 28 quarters.
  • William Blair Investment Management's ESCO Technologies position peaked at $38M in Q3 2024.
  • 433 funds tracked by Wall St. Rank held ESCO Technologies as of Q1 2026.

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