William Blair Investment Management
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William Blair Investment Management’s MGIC Investment MTG Stock Holding History

William Blair Investment Management’s Portfolio MTG Stock Details MTG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-515,948
Closed -$14.6M – 442
2025
Q3 		$14.6M Sell
515,948
-413,949
-45% -$11.3M 0.04% 301
2025
Q2 		$25.9M Sell
929,897
-74,554
-7% -$1.92M 0.07% 250
2025
Q1 		$24.9M Sell
1,004,451
-360,274
-26% -$8.73M 0.07% 261
2024
Q4 		$32.4M Buy
1,364,725
+32,980
+2% +$824K 0.08% 234
2024
Q3 		$34.1M Sell
1,331,745
-357,808
-21% -$8.62M 0.08% 205
2024
Q2 		$36.4M Sell
1,689,553
-3,767
-0.2% -$78.1K 0.1% 178
2024
Q1 		$37.9M Sell
1,693,320
-144,645
-8% -$2.89M 0.1% 194
2023
Q4 		$35.5M Sell
1,837,965
-27,926
-1% -$494K 0.1% 196
2023
Q3 		$31.1M Sell
1,865,891
-723,038
-28% -$12.3M 0.1% 203
2023
Q2 		$40.9M Buy
2,588,929
+47,597
+2% +$706K 0.13% 159
2023
Q1 		$34.1M Buy
2,541,332
+7,256
+0.3% +$97.7K 0.12% 188
2022
Q4 		$32.9M Sell
2,534,076
-96,076
-4% -$1.26M 0.13% 178
2022
Q3 		$33.7M Sell
2,630,152
-54,630
-2% -$765K 0.13% 162
2022
Q2 		$33.8M Sell
2,684,782
-79,557
-3% -$1.05M 0.13% 190
2022
Q1 		$37.5M Sell
2,764,339
-8,690
-0.3% -$130K 0.11% 202
2021
Q4 		$40M Sell
2,773,029
-235,490
-8% -$3.57M 0.11% 209
2021
Q3 		$45M Buy
3,008,519
+3,002,219
+47,654% +$43.5M 0.13% 188
2021
Q2 		$86K Buy
+6,300
New +$90.5K ﹤0.01% 407

Other funds holding MTG

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
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
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $46.4B AUM 27.74% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Allianz Asset Management
Allianz Asset Management Munich, Germany $95.4B AUM 38.74% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return

William Blair Investment Management's MTG Position: Q4 2025 in Review

William Blair Investment Management sold out of MGIC Investment (MTG) in Q4 2025, closing a stake of 515,948 shares — an estimated $14.6M sold.

William Blair Investment Management first reported a position in MTG in Q2 2021 and held it in 18 quarters. The position peaked at $45M in Q3 2021. 526 funds tracked by Wall St. Rank hold MTG as of Q4 2025.

  • William Blair Investment Management reported no remaining MGIC Investment position as of Q4 2025 after selling out during the quarter.
  • William Blair Investment Management sold 515,948 MGIC Investment shares in Q4 2025, an estimated $14.6M.
  • William Blair Investment Management first reported a position in MGIC Investment in Q2 2021 and held it in 18 quarters.
  • William Blair Investment Management's MGIC Investment position peaked at $45M in Q3 2021.
  • 526 funds tracked by Wall St. Rank held MGIC Investment as of Q4 2025.

Based on William Blair Investment Management's 13F filing for Q4 2025, filed 9 Feb 2026.