William Blair Investment Management
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William Blair Investment Management’s PDF Solutions PDFS Stock Holding History

William Blair Investment Management’s Portfolio PDFS Stock Details PDFS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$39.2M Sell
554,226
-701,333
-56% -$34.8M 0.12% 166
2026
Q1 		$41.1M Sell
1,255,559
-102,922
-8% -$3.36M 0.14% 152
2025
Q4 		$38.8M Buy
1,358,481
+9,040
+0.7% +$250K 0.11% 164
2025
Q3 		$34.8M Buy
1,349,441
+162,358
+14% +$3.55M 0.09% 186
2025
Q2 		$25.4M Buy
1,187,083
+61,124
+5% +$1.16M 0.07% 254
2025
Q1 		$21.5M Buy
1,125,959
+62,376
+6% +$1.53M 0.06% 281
2024
Q4 		$28.8M Buy
1,063,583
+161,306
+18% +$4.86M 0.07% 264
2024
Q3 		$28.6M Buy
902,277
+158,642
+21% +$5.15M 0.07% 247
2024
Q2 		$27.1M Buy
743,635
+90,789
+14% +$3.04M 0.07% 249
2024
Q1 		$22M Buy
652,846
+4,909
+0.8% +$161K 0.06% 296
2023
Q4 		$20.8M Buy
647,937
+92,033
+17% +$2.79M 0.06% 287
2023
Q3 		$18M Sell
555,904
-141,321
-20% -$5.41M 0.06% 287
2023
Q2 		$31.4M Sell
697,225
-87,692
-11% -$3.58M 0.1% 222
2023
Q1 		$33.3M Sell
784,917
-54,923
-7% -$1.92M 0.12% 195
2022
Q4 		$24M Buy
839,840
+4,579
+0.5% +$124K 0.09% 244
2022
Q3 		$20.5M Buy
835,261
+41,898
+5% +$1.06M 0.08% 253
2022
Q2 		$17.1M Buy
793,363
+8,061
+1% +$186K 0.06% 274
2022
Q1 		$21.9M Sell
785,302
-313,252
-29% -$8.75M 0.07% 273
2021
Q4 		$34.9M Sell
1,098,554
-40,986
-4% -$1.14M 0.09% 235
2021
Q3 		$26.3M Buy
1,139,540
+353,005
+45% +$7.27M 0.07% 285
2021
Q2 		$14.3M Sell
786,535
-17,713
-2% -$317K 0.04% 252
2021
Q1 		$14.3M Buy
804,248
+59,575
+8% +$1.18M 0.05% 249
2020
Q4 		$16.1M Buy
744,673
+111,334
+18% +$2.34M 0.05% 230
2020
Q3 		$11.8M Buy
633,339
+154,227
+32% +$3.18M 0.05% 250
2020
Q2 		$9.37M Buy
+479,112
New +$7.79M 0.04% 257

Other funds holding PDFS

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
NIM
Needham Investment Management New York $3.33B AUM 163.16% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
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
WA
Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return
Barrow, Hanley, Mewhinney & Strauss
Barrow, Hanley, Mewhinney & Strauss Dallas, Texas $33B AUM 40.62% 1-Year Est. Return
RIM
Ranger Investment Management Dallas, Texas $1.58B AUM 51% 1-Year Est. Return
SCM
Snyder Capital Management San Francisco, California $5.79B AUM 33.56% 1-Year Est. Return
JT
Jupiter Topco New York $245B AUM

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

William Blair Investment Management reduced its PDF Solutions (PDFS) stake by 56% in Q2 2026, selling an estimated $34.8M and leaving 554,226 shares worth $39.2M. The position accounts for 0.12% of the portfolio, ranked #166.

William Blair Investment Management first reported a position in PDFS in Q2 2020 and has held it in 25 quarters since. The position peaked at $41.1M in Q1 2026. 282 funds tracked by Wall St. Rank hold PDFS as of Q2 2026.

  • William Blair Investment Management held 554,226 shares of PDF Solutions worth $39.2M as of Q2 2026.
  • William Blair Investment Management sold 701,333 PDF Solutions shares in Q2 2026, an estimated $34.8M.
  • PDF Solutions made up 0.12% of William Blair Investment Management's portfolio in Q2 2026, its #166 holding.
  • William Blair Investment Management first reported a position in PDF Solutions in Q2 2020 and has held it in 25 quarters since.
  • William Blair Investment Management's PDF Solutions position peaked at $41.1M in Q1 2026.
  • 282 funds tracked by Wall St. Rank held PDF Solutions as of Q2 2026.

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