Littelfuse, Inc.
US ˙ NasdaqGS ˙ US5370081045

SecurityLFUS / Littelfuse, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership502,809 shares
Latest Disclosed Value $ 170,595,499
Dimensional Fund Advisors Lp reports 2.65% decrease in ownership of LFUS / Littelfuse, Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 502,809 shares of Littelfuse, Inc. (US:LFUS) valued at $170,628,234 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 516,479 shares of Littelfuse, Inc.. This represents a change in shares of -2.65% during the quarter. The current value of the position is $243,686,382 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F LITTELFUSE COM 537008104 502,809 -13,670 -2.65 170,595 30.59 0.0076
2026-02-12 2025-12-31 13F LITTELFUSE COM 537008104 516,479 25,860 5.27 130,635 2.80 0.0274
2025-11-12 2025-09-30 13F LITTELFUSE COM 537008104 490,619 11,394 2.38 127,071 16.95 0.0273
2025-08-12 2025-06-30 13F LITTELFUSE COM 537008104 479,225 3,583 0.75 108,655 16.11 0.0252
2025-05-13 2025-03-31 13F LITTELFUSE COM 537008104 475,642 33,088 7.48 93,581 -10.27 0.0233
2025-02-13 2024-12-31 13F LITTELFUSE COM 537008104 442,554 22,287 5.30 104,287 -6.45 0.0250
2024-11-07 2024-09-30 13F LITTELFUSE COM 537008104 420,267 681 0.16 111,474 3.95 0.0270
2024-08-09 2024-06-30 13F LITTELFUSE COM 537008104 419,586 49,588 13.40 107,244 19.60 0.0280
2024-05-10 2024-03-31 13F LITTELFUSE COM 537008104 369,998 23,824 6.88 89,669 -3.19 0.0243
2024-02-07 2023-12-31 13F LITTELFUSE COM 537008104 346,174 10,770 3.21 92,627 11.66 0.0270
2023-11-09 2023-09-30 13F LITTELFUSE COM 537008104 335,404 17,213 5.41 82,954 -10.50 0.0272
2023-08-09 2023-06-30 13F LITTELFUSE COM 537008104 318,191 -3,087 -0.96 92,689 7.62 0.0295
2023-05-12 2023-03-31 13F LITTELFUSE COM 537008104 321,278 -4,947 -1.52 86,129 121,208.45 0.0290
2023-02-09 2022-12-31 13F LITTELFUSE COM 537008104 326,225 20,196 6.60 72 -99.88 0.0212
2022-11-10 2022-09-30 13F LITTELFUSE COM 537008104 306,029 22,282 7.85 60,810 -15.64 0.0233
2022-08-12 2022-06-30 13F LITTELFUSE COM 537008104 283,747 2,698 0.96 72,082 2.83 0.0259
2022-05-13 2022-03-31 13F LITTELFUSE COM 537008104 281,049 9,985 3.68 70,100 -17.82 0.0216
2022-02-09 2021-12-31 13F LITTELFUSE COM 537008104 271,064 -2,154 -0.79 85,297 14.24 0.0258
2021-11-12 2021-09-30 13F LITTELFUSE COM 537008104 273,218 12,040 4.61 74,666 12.20 0.0241
2021-08-12 2021-06-30 13F LITTELFUSE COM 537008104 261,178 -465 -0.18 66,545 -3.77 0.0211
2021-05-14 2021-03-31 13F LITTELFUSE COM 537008104 261,643 -15,239 -5.50 69,154 -1.92 0.0229
2021-03-08 2020-12-31 13F/A-2 LITTELFUSE COM 537008104 276,882 -7,850 -2.76 70,510 39.64 0.0255
2021-02-11 2020-12-31 13F LITTELFUSE COM 537008104 276,882 -7,850 70,510 25,464.4642
2020-11-12 2020-09-30 13F LITTELFUSE COM 537008104 284,732 -1,561 -0.55 50,494 3.37 0.0214
2020-08-13 2020-06-30 13F LITTELFUSE COM 537008104 286,293 -4,735 -1.63 48,847 25.81 0.0215
2020-05-14 2020-03-31 13F LITTELFUSE COM 537008104 291,028 4,337 1.51 38,826 -29.21 0.0202
2020-02-14 2019-12-31 13F LITTELFUSE COM 537008104 286,691 10,629 3.85 54,845 12.05 0.0200
2019-11-12 2019-09-30 13F LITTELFUSE COM 537008104 276,062 -1,875 -0.67 48,949 -0.45 0.0190
2019-08-13 2019-06-30 13F LITTELFUSE COM 537008104 277,937 8,837 3.28 49,170 0.13 0.0191
2019-08-12 2019-03-31 13F/A-2 LITTELFUSE COM 537008104 269,100 12,282 4.78 49,106 11.51 0.0196
2019-05-10 2019-03-31 13F LITTELFUSE COM 537008104 269,100 12,282 49,106
2019-02-26 2018-12-31 13F/A-1 LITTELFUSE COM 537008104 256,818 31,963 14.21 44,037 -1.03 0.0199
2019-02-13 2018-12-31 13F LITTELFUSE COM 537008104 256,818 31,963 44,037
2018-11-13 2018-09-30 13F LITTELFUSE COM 537008104 224,855 -560 -0.25 44,495 -13.49 0.0169
2018-08-10 2018-06-30 13F LITTELFUSE COM 537008104 225,415 -155,889 -40.88 51,435 -35.20 0.0205
2018-05-11 2018-03-31 13F LITTELFUSE COM 537008104 381,304 35,012 10.11 79,380 15.88 0.0331
2018-02-12 2017-12-31 13F LITTELFUSE COM 537008104 346,292 -37,371 -9.74 68,504 -8.85 0.0284
2017-11-13 2017-09-30 13F LITTELFUSE COM 537008104 383,663 -60,507 -13.62 75,153 2.54 0.0328
2017-08-11 2017-06-30 13F LITTELFUSE COM 537008104 444,170 -3,738 -0.83 73,288 2.32 0.0338
2017-05-12 2017-03-31 13F LITTELFUSE COM 537008104 447,908 -6,442 -1.42 71,625 3.87 0.0342
2017-02-09 2016-12-31 13F LITTELFUSE COM 537008104 454,350 -2,676 -0.59 68,957 17.14 0.0344
2016-11-10 2016-09-30 13F LITTELFUSE COM 537008104 457,026 -6,072 -1.31 58,868 7.56 0.0318
2016-08-09 2016-06-30 13F LITTELFUSE COM 537008104 463,098 -58,951 -11.29 54,732 -14.84 0.0315
2016-05-13 2016-03-31 13F LITTELFUSE COM 537008104 522,049 7,716 1.50 64,269 16.77 0.0385
2016-02-10 2015-12-31 13F LITTELFUSE COM 537008104 514,333 9,430 1.87 55,039 19.60 0.0343
2015-11-13 2015-09-30 13F LITTELFUSE COM 537008104 504,903 80,151 18.87 46,021 14.18 0.0302
2015-08-14 2015-06-30 13F LITTELFUSE COM 537008104 424,752 10,663 2.58 40,305 -2.07 0.0247
2015-05-14 2015-03-31 13F LITTELFUSE COM 537008104 414,089 23,985 6.15 41,156 9.13 0.0260
2015-02-06 2014-12-31 13F LITTELFUSE COM 537008104 390,104 9,147 2.40 37,713 16.21 0.0248
2014-11-13 2014-09-30 13F LITTELFUSE COM 537008104 380,957 3,470 0.92 32,452 -7.51 0.0230
2014-08-08 2014-06-30 13F LITTELFUSE COM 537008104 377,487 16,697 4.63 35,087 3.86 0.0244
2014-05-14 2014-03-31 13F LITTELFUSE COM 537008104 360,790 7,869 2.23 33,783 3.01 0.0252
2014-02-12 2013-12-31 13F LITTELFUSE COM 537008104 352,921 11,983 3.51 32,797 22.98 0.0256
2013-11-13 2013-09-30 13F LITTELFUSE COM 537008104 340,938 1,964 0.58 26,668 5.44 0.0231
2013-08-15 2013-06-30 13F LITTELFUSE COM 537008104 338,974 338,974 25,291 0.0238
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.