William Blair & Company
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William Blair & Company’s MediaAlpha MAX Stock Holding History

William Blair & Company’s Portfolio MAX Stock Details MAX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$521K Sell
55,975
-4,171
-7% -$41.1K ﹤0.01% 1134
2025
Q4 		$779K Sell
60,146
-6,051
-9% -$73.9K ﹤0.01% 1002
2025
Q3 		$753K Buy
66,197
+2,190
+3% +$24.2K ﹤0.01% 991
2025
Q2 		$701K Sell
64,007
-130
-0.2% -$1.25K ﹤0.01% 992
2025
Q1 		$593K Buy
64,137
+11,071
+21% +$118K ﹤0.01% 1038
2024
Q4 		$599K Buy
+53,066
New +$763K ﹤0.01% 1041
2023
Q1 		– Sell
-20,561
Closed -$205K – 1836
2022
Q4 		$205K Sell
20,561
-2,818
-12% -$31.1K ﹤0.01% 1360
2022
Q3 		$205K Sell
23,379
-1,757
-7% -$17.1K ﹤0.01% 1376
2022
Q2 		$248K Sell
25,136
-19,223
-43% -$234K ﹤0.01% 1333
2022
Q1 		$734K Buy
44,359
+441
+1% +$6.17K ﹤0.01% 1027
2021
Q4 		$678K Sell
43,918
-131,203
-75% -$2.19M ﹤0.01% 1099
2021
Q3 		$3.27M Buy
175,121
+18,041
+11% +$488K 0.01% 564
2021
Q2 		$6.61M Buy
157,080
+19,027
+14% +$761K 0.02% 400
2021
Q1 		$4.89M Buy
+138,053
New +$6.85M 0.02% 457

Other funds holding MAX

WMIG
White Mountains Insurance Group Hanover, New Hampshire $313M AUM 14.8% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
CC
Clearline Capital New York $1.93B AUM 38.13% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
JGC
J. Goldman & Co New York $3.44B AUM 33.8% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return
JAM
Jacobs Asset Management New York $167M AUM 22.68% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

William Blair & Company's MAX Position: Q1 2026 in Review

William Blair & Company reduced its MediaAlpha (MAX) stake by 6.9% in Q1 2026, selling an estimated $41.1K and leaving 55,975 shares worth $521K. The position accounts for ﹤0.01% of the portfolio, ranked #1134.

William Blair & Company first reported a position in MAX in Q1 2021 and has held it in 14 quarters since. The position peaked at $6.61M in Q2 2021. 162 funds tracked by Wall St. Rank hold MAX as of Q1 2026.

  • William Blair & Company held 55,975 shares of MediaAlpha worth $521K as of Q1 2026.
  • William Blair & Company sold 4,171 MediaAlpha shares in Q1 2026, an estimated $41.1K.
  • MediaAlpha made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #1134 holding.
  • William Blair & Company first reported a position in MediaAlpha in Q1 2021 and has held it in 14 quarters since.
  • William Blair & Company's MediaAlpha position peaked at $6.61M in Q2 2021.
  • 162 funds tracked by Wall St. Rank held MediaAlpha as of Q1 2026.

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