Littelfuse, Inc.
US ˙ NasdaqGS ˙ US5370081045

SecurityLFUS / Littelfuse, Inc.
InstitutionProShare Advisors LLC
Latest Disclosed Ownership106,977 shares
Latest Disclosed Value $ 36,302,644
ProShare Advisors LLC reports 298.34% increase in ownership of LFUS / Littelfuse, Inc.

On April 24, 2026 - ProShare Advisors LLC filed a 13F-HR form disclosing ownership of 106,977 shares of Littelfuse, Inc. (US:LFUS) valued at $36,302,645 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 26,856 shares of Littelfuse, Inc.. This represents a change in shares of 298.34% during the quarter. The current value of the position is $51,846,403 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)
2026-04-24 2026-03-31 13F LITTELFUSE COM 537008104 106,977 80,121 298.34 36,303 434.48 0.0538
2026-02-06 2025-12-31 13F LITTELFUSE COM 537008104 26,856 -3,214 -10.69 6,792 -12.79 0.0120
2025-11-06 2025-09-30 13F LITTELFUSE COM 537008104 30,070 -4,883 -13.97 7,788 -1.72 0.0163
2025-08-07 2025-06-30 13F LITTELFUSE COM 537008104 34,953 5,258 17.71 7,925 35.64 0.0158
2025-05-08 2025-03-31 13F LITTELFUSE COM 537008104 29,695 -681 -2.24 5,842 -18.39 0.0132
2025-02-14 2024-12-31 13F LITTELFUSE COM 537008104 30,376 623 2.09 7,158 -9.29 0.0164
2024-11-14 2024-09-30 13F LITTELFUSE COM 537008104 29,753 -2,132 -6.69 7,892 -3.17 0.0193
2024-08-13 2024-06-30 13F LITTELFUSE COM 537008104 31,885 -781 -2.39 8,149 2.94 0.0218
2024-05-08 2024-03-31 13F LITTELFUSE COM 537008104 32,666 3,451 11.81 7,917 1.28 0.0210
2024-02-14 2023-12-31 13F LITTELFUSE COM 537008104 29,215 8,520 41.17 7,817 52.72 0.0239
2023-11-13 2023-09-30 13F LITTELFUSE COM 537008104 20,695 1,359 7.03 5,118 -9.13 0.0160
2023-08-10 2023-06-30 13F LITTELFUSE COM 537008104 19,336 3,673 23.45 5,633 34.13 0.0163
2023-05-26 2023-03-31 13F/A-1 LITTELFUSE COM 537008104 15,663 1,213 8.39 4,199 32.00 0.0128
2023-05-12 2023-03-31 13F LITTELFUSE COM 537008104 15,663 1,213 4,199 0.0134
2023-02-02 2022-12-31 13F LITTELFUSE COM 537008104 14,450 1,874 14.90 3,182 27.29 0.0112
2022-11-07 2022-09-30 13F LITTELFUSE COM 537008104 12,576 -1,061 -7.78 2,499 -27.86 0.0096
2022-08-01 2022-06-30 13F LITTELFUSE COM 537008104 13,637 1,279 10.35 3,464 12.36 0.0115
2022-05-10 2022-03-31 13F LITTELFUSE COM 537008104 12,358 -881 -6.65 3,083 -25.98 0.0066
2022-02-08 2021-12-31 13F LITTELFUSE COM 537008104 13,239 -413 -3.03 4,165 11.63 0.0082
2021-11-12 2021-09-30 13F LITTELFUSE COM 537008104 13,652 1,540 12.71 3,731 20.90 0.0105
2021-08-13 2021-06-30 13F LITTELFUSE COM 537008104 12,112 1,717 16.52 3,086 12.26 0.0090
2021-05-14 2021-03-31 13F LITTELFUSE COM 537008104 10,395 -2,676 -20.47 2,749 -17.42 0.0086
2021-02-09 2020-12-31 13F LITTELFUSE COM 537008104 13,071 -337 -2.51 3,329 39.99 0.0124
2020-11-13 2020-09-30 13F LITTELFUSE COM 537008104 13,408 2,610 24.17 2,378 29.10 0.0110
2020-08-03 2020-06-30 13F LITTELFUSE COM 537008104 10,798 6,016 125.81 1,842 188.71 0.0098
2020-05-15 2020-03-31 13F LITTELFUSE COM 537008104 4,782 131 2.82 638 -28.31 0.0046
2020-02-12 2019-12-31 13F LITTELFUSE COM 537008104 4,651 2,698 138.15 890 157.23 0.0041
2019-11-12 2019-09-30 13F LITTELFUSE COM 537008104 1,953 -127 -6.11 346 -5.98 0.0019
2019-08-13 2019-06-30 13F LITTELFUSE COM 537008104 2,080 -78 -3.61 368 -6.60 0.0022
2019-05-15 2019-03-31 13F LITTELFUSE COM 537008104 2,158 379 21.30 394 29.18 0.0024
2019-02-14 2018-12-31 13F LITTELFUSE COM 537008104 1,779 -427 -19.36 305 -30.21 0.0021
2018-11-14 2018-09-30 13F LITTELFUSE COM 537008104 2,206 -82 -3.58 437 -16.28 0.0030
2018-08-13 2018-06-30 13F LITTELFUSE COM 537008104 2,288 -3,056 -57.19 522 -53.10 0.0035
2018-05-14 2018-03-31 13F LITTELFUSE COM 537008104 5,344 -123 -2.25 1,113 2.96 0.0073
2018-02-14 2017-12-31 13F LITTELFUSE COM 537008104 5,467 2,376 76.87 1,081 78.68 0.0075
2017-11-13 2017-09-30 13F LITTELFUSE COM 537008104 3,091 -575 -15.68 605 0.00 0.0056
2017-08-11 2017-06-30 13F LITTELFUSE COM 537008104 3,666 -887 -19.48 605 -16.90 0.0060
2017-05-12 2017-03-31 13F/A-2 LITTELFUSE COM 537008104 4,553 -1,284 -22.00 728 -17.83 0.0076
2017-05-08 2017-03-31 13F/A-1 LITTELFUSE COM 537008104 4,553 0 728 0.0076
2017-04-25 2017-03-31 13F LITTELFUSE COM 537008104 4,553 728
2017-02-13 2016-12-31 13F LITTELFUSE COM 537008104 5,837 3,107 113.81 886 151.70 0.0098
2016-11-10 2016-09-30 13F LITTELFUSE COM 537008104 2,730 -594 -17.87 352 -10.43 0.0049
2016-08-12 2016-06-30 13F LITTELFUSE COM 537008104 3,324 -64 -1.89 393 -5.76 0.0051
2016-05-06 2016-03-31 13F LITTELFUSE COM 537008104 3,388 -593 -14.90 417 -2.11 0.0057
2016-02-05 2015-12-31 13F LITTELFUSE COM 537008104 3,981 1,297 48.32 426 73.88 0.0052
2015-11-06 2015-09-30 13F LITTELFUSE COM 537008104 2,684 -760 -22.07 245 -25.08 0.0034
2015-08-11 2015-06-30 13F LITTELFUSE COM 537008104 3,444 -1,747 -33.65 327 -36.63 0.0045
2015-05-08 2015-03-31 13F LITTELFUSE COM 537008104 5,191 5,191 0.00 516 0.0061
2015-01-30 2014-12-31 13F LITTELFUSE COM 537008104 0 -9,717 -100.00 0 -100.00
2014-11-06 2014-09-30 13F LITTELFUSE COM 537008104 9,717 -2,434 -20.03 828 -26.66 0.0110
2014-08-08 2014-06-30 13F LITTELFUSE COM 537008104 12,151 -10,925 -47.34 1,129 -47.76 0.0146
2014-05-07 2014-03-31 13F LITTELFUSE COM 537008104 23,076 23,076 57.78 2,161 88.90 0.0270
2014-02-04 2013-12-31 13F LITTELFUSE COM 537008104 0 -14,625 -100.00 0 -100.00
2013-11-07 2013-09-30 13F LITTELFUSE COM 537008104 14,625 -547 -3.61 1,144 1.06 0.0272
2013-07-25 2013-06-30 13F LITTELFUSE COM 537008104 15,172 15,172 1,132 0.0222
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.