William Blair Investment Management
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William Blair Investment Management’s F5 FFIV Stock Holding History

William Blair Investment Management’s Portfolio FFIV Stock Details FFIV Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$244M Sell
586,271
-63,677
-10% -$22.6M 0.73% 24
2026
Q1 		$188M Buy
649,948
+99,684
+18% +$27.6M 0.62% 33
2025
Q4 		$140M Buy
+550,264
New +$148M 0.39% 67
2023
Q4 		– Sell
-2,820
Closed -$454K – 418
2023
Q3 		$454K Buy
2,820
+1,302
+86% +$204K ﹤0.01% 363
2023
Q2 		$222K Sell
1,518
-181
-11% -$25.7K ﹤0.01% 384
2023
Q1 		$248K Buy
1,699
+4
+0.2% +$577 ﹤0.01% 376
2022
Q4 		$243K Buy
+1,695
New +$248K ﹤0.01% 384
2022
Q3 		– Sell
-1,369
Closed -$210K – 398
2022
Q2 		$210K Sell
1,369
-1,080
-44% -$188K ﹤0.01% 390
2022
Q1 		$512K Buy
2,449
+132
+6% +$27.7K ﹤0.01% 397
2021
Q4 		$567K Hold
2,317
– – ﹤0.01% 373
2021
Q3 		$461K Buy
+2,317
New +$463K ﹤0.01% 394
2018
Q1 		– Sell
-8,849
Closed -$1.16M – 443
2017
Q4 		$1.16M Buy
+8,849
New +$1.1M ﹤0.01% 399

Other funds holding FFIV

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
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
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
JCAM
Jericho Capital Asset Management New York $12.1B AUM 109.57% 1-Year Est. Return
Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management Los Angeles, California $34.3B AUM 22.63% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return

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

William Blair Investment Management reduced its F5 (FFIV) stake by 9.8% in Q2 2026, selling an estimated $22.6M and leaving 586,271 shares worth $244M. The position accounts for 0.73% of the portfolio, ranked #24.

William Blair Investment Management first reported a position in FFIV in Q4 2017 and has held it in 12 quarters since. 829 funds tracked by Wall St. Rank hold FFIV as of Q2 2026.

  • William Blair Investment Management held 586,271 shares of F5 worth $244M as of Q2 2026.
  • William Blair Investment Management sold 63,677 F5 shares in Q2 2026, an estimated $22.6M.
  • F5 made up 0.73% of William Blair Investment Management's portfolio in Q2 2026, its #24 holding.
  • William Blair Investment Management first reported a position in F5 in Q4 2017 and has held it in 12 quarters since.
  • 829 funds tracked by Wall St. Rank held F5 as of Q2 2026.

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