William Blair Investment Management
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William Blair Investment Management’s Littelfuse LFUS Stock Holding History

William Blair Investment Management’s Portfolio LFUS Stock Details LFUS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$146M Buy
321,681
+17,106
+6% +$7.41M 0.44% 68
2026
Q1 		$103M Buy
+304,575
New +$98.9M 0.34% 86
2021
Q4 		– Sell
-48,279
Closed -$13.2M – 443
2021
Q3 		$13.2M Buy
48,279
+564
+1% +$150K 0.04% 341
2021
Q2 		$12.2M Sell
47,715
-50,986
-52% -$13.3M 0.04% 263
2021
Q1 		$26.1M Buy
98,701
+7,258
+8% +$1.93M 0.08% 195
2020
Q4 		$23.3M Sell
91,443
-24,555
-21% -$5.44M 0.08% 195
2020
Q3 		$20.6M Buy
115,998
+3,842
+3% +$682K 0.08% 190
2020
Q2 		$19.1M Sell
112,156
-4,455
-4% -$676K 0.08% 192
2020
Q1 		$15.6M Buy
116,611
+13,304
+13% +$2.23M 0.08% 197
2019
Q4 		$19.8M Buy
103,307
+23,712
+30% +$4.35M 0.08% 200
2019
Q3 		$14.1M Buy
79,595
+10,717
+16% +$1.81M 0.06% 259
2019
Q2 		$12.2M Sell
68,878
-1,329
-2% -$241K 0.05% 295
2019
Q1 		$12.8M Buy
70,207
+14,320
+26% +$2.64M 0.05% 291
2018
Q4 		$9.58M Buy
55,887
+3,239
+6% +$578K 0.05% 314
2018
Q3 		$10.4M Buy
52,648
+7,717
+17% +$1.7M 0.04% 336
2018
Q2 		$10.3M Buy
44,931
+4,809
+12% +$1.03M 0.04% 327
2018
Q1 		$8.35M Sell
40,122
-718
-2% -$151K 0.03% 323
2017
Q4 		$8.08M Sell
40,840
-6,459
-14% -$1.3M 0.03% 314
2017
Q3 		$9.27M Buy
47,299
+2,143
+5% +$389K 0.03% 320
2017
Q2 		$7.45M Buy
+45,156
New +$7.25M 0.03% 326
2016
Q3 		– Sell
-99,719
Closed -$11.8M – 462
2016
Q2 		$11.8M Sell
99,719
-29,602
-23% -$3.44M 0.05% 280
2016
Q1 		$15.9M Sell
129,321
-29,526
-19% -$3.25M 0.06% 242
2015
Q4 		$17M Sell
158,847
-24,746
-13% -$2.55M 0.07% 227
2015
Q3 		$16.7M Buy
+183,593
New +$16.7M 0.03% 568

Other funds holding LFUS

BlackRock
BlackRock New York $6.73T AUM 46.02% 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
VLKIM
Van Lanschot Kempen Investment Management Amsterdam, Netherlands $13.1B AUM 19.56% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
MPI
Mairs & Power Inc St Paul, Minnesota $10.9B AUM 27.5% 1-Year Est. Return
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
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

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

William Blair Investment Management increased its Littelfuse (LFUS) stake by 5.6% in Q2 2026, buying an estimated $7.41M and bringing the position to 321,681 shares worth $146M. The position accounts for 0.44% of the portfolio, ranked #68.

William Blair Investment Management first reported a position in LFUS in Q3 2015 and has held it in 24 quarters since. 608 funds tracked by Wall St. Rank hold LFUS as of Q2 2026.

  • William Blair Investment Management held 321,681 shares of Littelfuse worth $146M as of Q2 2026.
  • William Blair Investment Management bought 17,106 Littelfuse shares in Q2 2026, an estimated $7.41M.
  • Littelfuse made up 0.44% of William Blair Investment Management's portfolio in Q2 2026, its #68 holding.
  • William Blair Investment Management first reported a position in Littelfuse in Q3 2015 and has held it in 24 quarters since.
  • 608 funds tracked by Wall St. Rank held Littelfuse as of Q2 2026.

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