William Blair & Company
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William Blair & Company’s Vicor VICR Stock Holding History

William Blair & Company’s Portfolio VICR Stock Details VICR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$1.97M Buy
5,181
+512
+11% +$140K 0.01% 759
2026
Q1 		$752K Sell
4,669
-522
-10% -$86.3K ﹤0.01% 1028
2025
Q4 		$569K Buy
5,191
+281
+6% +$23.9K ﹤0.01% 1095
2025
Q3 		$244K Hold
4,910
– – ﹤0.01% 1388
2025
Q2 		$223K Hold
4,910
– – ﹤0.01% 1378
2025
Q1 		$230K Buy
4,910
+550
+13% +$29.1K ﹤0.01% 1356
2024
Q4 		$211K Sell
4,360
-1,520
-26% -$75.9K ﹤0.01% 1422
2024
Q3 		$248K Sell
5,880
-1,220
-17% -$45.4K ﹤0.01% 1361
2024
Q2 		$235K Sell
7,100
-980
-12% -$33.8K ﹤0.01% 1352
2024
Q1 		$309K Hold
8,080
– – ﹤0.01% 1243
2023
Q4 		$363K Hold
8,080
– – ﹤0.01% 1167
2023
Q3 		$476K Hold
8,080
– – ﹤0.01% 1070
2023
Q2 		$436K Buy
8,080
+1,000
+14% +$49.3K ﹤0.01% 1102
2023
Q1 		$332K Hold
7,080
– – ﹤0.01% 1198
2022
Q4 		$381K Sell
7,080
-400
-5% -$21K ﹤0.01% 1131
2022
Q3 		$442K Hold
7,480
– – ﹤0.01% 1086
2022
Q2 		$409K Hold
7,480
– – ﹤0.01% 1140
2022
Q1 		$528K Sell
7,480
-400
-5% -$35.9K ﹤0.01% 1136
2021
Q4 		$1M Sell
7,880
-180
-2% -$25.5K ﹤0.01% 959
2021
Q3 		$1.08M Hold
8,060
– – ﹤0.01% 898
2021
Q2 		$852K Hold
8,060
– – ﹤0.01% 969
2021
Q1 		$685K Hold
8,060
– – ﹤0.01% 1029
2020
Q4 		$743K Buy
+8,060
New +$677K ﹤0.01% 963

Other funds holding VICR

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return
Manulife (Manufacturers Life Insurance)
Manulife (Manufacturers Life Insurance) Canada, Ontario, Canada $128B AUM 35.83% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return

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

William Blair & Company increased its Vicor (VICR) stake by 11% in Q2 2026, buying an estimated $140K and bringing the position to 5,181 shares worth $1.97M. The position accounts for 0.01% of the portfolio, ranked #759.

William Blair & Company first reported a position in VICR in Q4 2020 and has held it in 23 quarters since. 514 funds tracked by Wall St. Rank hold VICR as of Q2 2026.

  • William Blair & Company held 5,181 shares of Vicor worth $1.97M as of Q2 2026.
  • William Blair & Company bought 512 Vicor shares in Q2 2026, an estimated $140K.
  • Vicor made up 0.01% of William Blair & Company's portfolio in Q2 2026, its #759 holding.
  • William Blair & Company first reported a position in Vicor in Q4 2020 and has held it in 23 quarters since.
  • 514 funds tracked by Wall St. Rank held Vicor as of Q2 2026.

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