William Blair Investment Management
ADT icon

William Blair Investment Management’s ADT ADT Stock Holding History

William Blair Investment Management’s Portfolio ADT Stock Details ADT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-2,566,675
Closed -$21.7M – 415
2025
Q2 		$21.7M Buy
2,566,675
+11,161
+0.4% +$91.4K 0.06% 273
2025
Q1 		$20.8M Sell
2,555,514
-64,674
-2% -$488K 0.06% 289
2024
Q4 		$18.1M Sell
2,620,188
-468,876
-15% -$3.42M 0.04% 318
2024
Q3 		$22.3M Sell
3,089,064
-8,232
-0.3% -$60.4K 0.06% 293
2024
Q2 		$23.5M Buy
3,097,296
+18,360
+0.6% +$127K 0.06% 280
2024
Q1 		$20.7M Sell
3,078,936
-298,933
-9% -$1.99M 0.05% 302
2023
Q4 		$23M Sell
3,377,869
-364,004
-10% -$2.27M 0.07% 277
2023
Q3 		$22.5M Buy
3,741,873
+1,778,262
+91% +$11.1M 0.07% 262
2023
Q2 		$11.8M Buy
1,963,611
+283,157
+17% +$1.77M 0.04% 316
2023
Q1 		$12.1M Buy
1,680,454
+222,041
+15% +$1.81M 0.04% 307
2022
Q4 		$13.2M Buy
+1,458,413
New +$13M 0.05% 298

Other funds holding ADT

State Farm Mutual Automobile Insurance
State Farm Mutual Automobile Insurance Bloomington, Illinois $127B AUM 32.55% 1-Year Est. Return
AMH
Apollo Management Holdings New York $7.6B AUM 23.97% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $46.4B AUM 27.74% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
AI
Ariel Investments Chicago, Illinois $8.93B AUM 29.58% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return

William Blair Investment Management's ADT Position: Q3 2025 in Review

William Blair Investment Management sold out of ADT (ADT) in Q3 2025, closing a stake of 2,566,675 shares — an estimated $21.7M sold.

William Blair Investment Management first reported a position in ADT in Q4 2022 and held it in 11 quarters. The position peaked at $23.5M in Q2 2024. 461 funds tracked by Wall St. Rank hold ADT as of Q3 2025.

  • William Blair Investment Management reported no remaining ADT position as of Q3 2025 after selling out during the quarter.
  • William Blair Investment Management sold 2,566,675 ADT shares in Q3 2025, an estimated $21.7M.
  • William Blair Investment Management first reported a position in ADT in Q4 2022 and held it in 11 quarters.
  • William Blair Investment Management's ADT position peaked at $23.5M in Q2 2024.
  • 461 funds tracked by Wall St. Rank held ADT as of Q3 2025.

Based on William Blair Investment Management's 13F filing for Q3 2025, filed 12 Nov 2025.