William Blair & Company
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William Blair & Company’s Polaris PII Stock Holding History

William Blair & Company’s Portfolio PII Stock Details PII Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$211K Buy
+3,088
New +$199K ﹤0.01% 1555
2022
Q1 		– Sell
-2,698
Closed -$297K – 1977
2021
Q4 		$297K Buy
+2,698
New +$318K ﹤0.01% 1426
2019
Q2 		– Sell
-3,875
Closed -$327K – 1762
2019
Q1 		$327K Buy
3,875
+73
+2% +$6.19K ﹤0.01% 1118
2018
Q4 		$292K Sell
3,802
-1,681
-31% -$151K ﹤0.01% 1091
2018
Q3 		$554K Buy
5,483
+122
+2% +$13.6K ﹤0.01% 927
2018
Q2 		$655K Sell
5,361
-2,094
-28% -$245K ﹤0.01% 852
2018
Q1 		$854K Buy
7,455
+18
+0.2% +$2.17K 0.01% 750
2017
Q4 		$922K Sell
7,437
-158
-2% -$18.7K 0.01% 769
2017
Q3 		$795K Buy
7,595
+628
+9% +$59.5K 0.01% 785
2017
Q2 		$643K Sell
6,967
-142
-2% -$12.2K ﹤0.01% 892
2017
Q1 		$598K Buy
7,109
+111
+2% +$9.55K ﹤0.01% 850
2016
Q4 		$577K Sell
6,998
-130
-2% -$10.6K 0.01% 789
2016
Q3 		$552K Buy
+7,128
New +$619K ﹤0.01% 799
2016
Q2 		– Sell
-3,061
Closed -$301K – 1262
2016
Q1 		$301K Sell
3,061
-334
-10% -$29K ﹤0.01% 932
2015
Q4 		$291K Sell
3,395
-33,075
-91% -$3.51M ﹤0.01% 962
2015
Q3 		$4.37M Sell
36,470
-1,532,422
-98% -$208M 0.04% 340
2015
Q2 		$232M Buy
1,568,892
+333,780
+27% +$48M 0.35% 66
2015
Q1 		$174M Buy
1,235,112
+11,916
+1% +$1.76M 0.27% 108
2014
Q4 		$185M Buy
1,223,196
+347,082
+40% +$52.1M 0.3% 86
2014
Q3 		$131M Buy
876,114
+410,198
+88% +$59.3M 0.22% 142
2014
Q2 		$60.7M Sell
465,916
-13,704
-3% -$1.81M 0.1% 282
2014
Q1 		$67M Sell
479,620
-5,302
-1% -$715K 0.11% 259
2013
Q4 		$70.6M Buy
484,922
+7,865
+2% +$1.05M 0.12% 266
2013
Q3 		$61.6M Buy
477,057
+52,952
+12% +$5.95M 0.11% 277
2013
Q2 		$40.3M Buy
+424,105
New +$38.4M 0.08% 361

Other funds holding PII

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
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
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board Toronto Ontario, Ontario, Canada $181B AUM 41.77% 1-Year Est. Return

William Blair & Company's PII Position: Q2 2026 in Review

William Blair & Company opened a new position in Polaris (PII) in Q2 2026: 3,088 shares worth $211K. The stake represents ﹤0.01% of the portfolio and ranks #1555 among its holdings. This is a return to the name: William Blair & Company previously reported a position in PII as recently as Q4 2021.

William Blair & Company first reported a position in PII in Q2 2013 and has held it in 25 quarters since. The position peaked at $232M in Q2 2015. 479 funds tracked by Wall St. Rank hold PII as of Q2 2026.

  • William Blair & Company held 3,088 shares of Polaris worth $211K as of Q2 2026.
  • Polaris was a new William Blair & Company position in Q2 2026.
  • Polaris made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1555 holding.
  • William Blair & Company first reported a position in Polaris in Q2 2013 and has held it in 25 quarters since.
  • William Blair & Company's Polaris position peaked at $232M in Q2 2015.
  • 479 funds tracked by Wall St. Rank held Polaris as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.