William Blair Investment Management
TRU icon

William Blair Investment Management’s TransUnion TRU Stock Holding History

William Blair Investment Management’s Portfolio TRU Stock Details TRU Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$191M Sell
2,648,744
-242,443
-8% -$17M 0.57% 41
2026
Q1 		$200M Sell
2,891,187
-1,074,308
-27% -$82.2M 0.66% 26
2025
Q4 		$340M Sell
3,965,495
-713,314
-15% -$58.6M 0.95% 11
2025
Q3 		$392M Sell
4,678,809
-60,294
-1% -$5.47M 1.01% 14
2025
Q2 		$417M Buy
4,739,103
+1,394,813
+42% +$116M 1.11% 12
2025
Q1 		$278M Sell
3,344,290
-26,452
-0.8% -$2.42M 0.78% 25
2024
Q4 		$313M Buy
3,370,742
+789,497
+31% +$80M 0.76% 20
2024
Q3 		$270M Buy
2,581,245
+2,198,113
+574% +$198M 0.67% 34
2024
Q2 		$28.4M Buy
+383,132
New +$28.6M 0.07% 234
2020
Q4 		– Sell
-1,975,946
Closed -$166M – 367
2020
Q3 		$166M Sell
1,975,946
-32,259
-2% -$2.79M 0.65% 59
2020
Q2 		$175M Buy
2,008,205
+19,894
+1% +$1.59M 0.71% 52
2020
Q1 		$132M Sell
1,988,311
-559,628
-22% -$48.3M 0.64% 49
2019
Q4 		$218M Sell
2,547,939
-540,939
-18% -$45.1M 0.87% 27
2019
Q3 		$251M Sell
3,088,878
-51,592
-2% -$4.15M 1.07% 17
2019
Q2 		$231M Sell
3,140,470
-27,336
-0.9% -$1.87M 0.97% 18
2019
Q1 		$212M Buy
3,167,806
+355,272
+13% +$22M 0.89% 25
2018
Q4 		$160M Sell
2,812,534
-169,507
-6% -$10.8M 0.79% 32
2018
Q3 		$219M Sell
2,982,041
-166,446
-5% -$12.4M 0.76% 32
2018
Q2 		$226M Sell
3,148,487
-36,478
-1% -$2.43M 0.84% 20
2018
Q1 		$181M Buy
3,184,965
+740,307
+30% +$42.7M 0.69% 39
2017
Q4 		$134M Buy
2,444,658
+107,067
+5% +$5.7M 0.52% 58
2017
Q3 		$110M Sell
2,337,591
-94,731
-4% -$4.33M 0.4% 85
2017
Q2 		$105M Buy
2,432,322
+110,181
+5% +$4.57M 0.38% 85
2017
Q1 		$89.1M Buy
+2,322,141
New +$81.6M 0.34% 97

Other funds holding TRU

Dodge & Cox
Dodge & Cox San Francisco, California $191B AUM 17.5% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
IFP
Independent Franchise Partners London, United Kingdom $15.2B AUM 1.56% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

William Blair Investment Management's TRU Position: Q2 2026 in Review

William Blair Investment Management reduced its TransUnion (TRU) stake by 8.4% in Q2 2026, selling an estimated $17M and leaving 2,648,744 shares worth $191M. The position accounts for 0.57% of the portfolio, ranked #41.

William Blair Investment Management first reported a position in TRU in Q1 2017 and has held it in 24 quarters since. The position peaked at $417M in Q2 2025. 520 funds tracked by Wall St. Rank hold TRU as of Q2 2026.

  • William Blair Investment Management held 2,648,744 shares of TransUnion worth $191M as of Q2 2026.
  • William Blair Investment Management sold 242,443 TransUnion shares in Q2 2026, an estimated $17M.
  • TransUnion made up 0.57% of William Blair Investment Management's portfolio in Q2 2026, its #41 holding.
  • William Blair Investment Management first reported a position in TransUnion in Q1 2017 and has held it in 24 quarters since.
  • William Blair Investment Management's TransUnion position peaked at $417M in Q2 2025.
  • 520 funds tracked by Wall St. Rank held TransUnion as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.