William Blair Investment Management
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William Blair Investment Management’s Diodes DIOD Stock Holding History

William Blair Investment Management’s Portfolio DIOD Stock Details DIOD Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$184M Buy
1,682,686
+1,241,124
+281% +$126M 0.55% 48
2026
Q1 		$30.1M Sell
441,562
-30,563
-6% -$1.93M 0.1% 189
2025
Q4 		$23.3M Sell
472,125
-49,700
-10% -$2.52M 0.07% 252
2025
Q3 		$27.8M Sell
521,825
-31,662
-6% -$1.7M 0.07% 236
2025
Q2 		$29.3M Sell
553,487
-44,239
-7% -$1.95M 0.08% 216
2025
Q1 		$25.8M Buy
597,726
+121,463
+26% +$6.56M 0.07% 251
2024
Q4 		$29.4M Buy
476,263
+13,310
+3% +$830K 0.07% 258
2024
Q3 		$29.7M Sell
462,953
-14,436
-3% -$1,000K 0.07% 241
2024
Q2 		$34.3M Sell
477,389
-2,225
-0.5% -$160K 0.09% 194
2024
Q1 		$33.8M Buy
479,614
+76,447
+19% +$5.31M 0.09% 224
2023
Q4 		$32.5M Buy
403,167
+254,758
+172% +$18.6M 0.09% 211
2023
Q3 		$11.7M Buy
+148,409
New +$12.5M 0.04% 312

Other funds holding DIOD

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 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
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
EARNEST Partners
EARNEST Partners Atlanta, Georgia $27.7B AUM 52.44% 1-Year Est. Return

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

William Blair Investment Management increased its Diodes (DIOD) stake by 281% in Q2 2026, buying an estimated $126M and bringing the position to 1,682,686 shares worth $184M. The position accounts for 0.55% of the portfolio, ranked #48.

William Blair Investment Management first reported a position in DIOD in Q3 2023 and has held it in 12 quarters since. 397 funds tracked by Wall St. Rank hold DIOD as of Q2 2026.

  • William Blair Investment Management held 1,682,686 shares of Diodes worth $184M as of Q2 2026.
  • William Blair Investment Management bought 1,241,124 Diodes shares in Q2 2026, an estimated $126M.
  • Diodes made up 0.55% of William Blair Investment Management's portfolio in Q2 2026, its #48 holding.
  • William Blair Investment Management first reported a position in Diodes in Q3 2023 and has held it in 12 quarters since.
  • 397 funds tracked by Wall St. Rank held Diodes as of Q2 2026.

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