Littelfuse, Inc.
US ˙ NasdaqGS ˙ US5370081045

SecurityLFUS / Littelfuse, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership218,571 shares
Latest Disclosed Value $ 74,169,527
Janus Henderson Group Plc reports 0.21% decrease in ownership of LFUS / Littelfuse, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 218,571 shares of Littelfuse, Inc. (US:LFUS) valued at $74,172,069 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 219,039 shares of Littelfuse, Inc.. This represents a change in shares of -0.21% during the quarter. The current value of the position is $105,930,435 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)
2026-05-18 2026-03-31 13F/A-1 LITTELFUSE COM 537008104 218,571 -468 -0.21 74,170 33.88 0.0125
2026-05-15 2026-03-31 13F LITTELFUSE COM 537008104 218,571 -468 -0.21 74,170 33.88 0.0138
2026-02-17 2025-12-31 13F LITTELFUSE COM 537008104 219,039 -1,845 -0.84 55,399 -3.17 0.0248
2025-11-14 2025-09-30 13F LITTELFUSE COM 537008104 220,884 5,852 2.72 57,212 17.35 0.0261
2025-08-14 2025-06-30 13F LITTELFUSE COM 537008104 215,032 42,900 24.92 48,752 40.94 0.0239
2025-05-15 2025-03-31 13F LITTELFUSE COM 537008104 172,132 160,872 1,428.70 34,591 1,204.34 0.0190
2025-02-14 2024-12-31 13F LITTELFUSE COM 537008104 11,260 0 0.00 2,652 -11.22 0.0013
2024-11-14 2024-09-30 13F LITTELFUSE COM 537008104 11,260 0 0.00 2,987 3.82 0.0015
2024-08-14 2024-06-30 13F LITTELFUSE COM 537008104 11,260 -126 -1.11 2,877 4.31 0.0015
2024-05-15 2024-03-31 13F LITTELFUSE COM 537008104 11,386 -21,112 -64.96 2,758 -68.28 0.0015
2024-02-14 2023-12-31 13F LITTELFUSE COM 537008104 32,498 9,074 38.74 8,696 50.15 0.0052
2023-11-14 2023-09-30 13F LITTELFUSE COM 537008104 23,424 1,777 8.21 5,791 -8.15 0.0038
2023-08-14 2023-06-30 13F LITTELFUSE COM 537008104 21,647 2,085 10.66 6,305 20.21 0.0039
2023-05-15 2023-03-31 13F LITTELFUSE COM 537008104 19,562 14,619 295.75 5,246 382.08 0.0035
2023-02-14 2022-12-31 13F LITTELFUSE COM 537008104 4,943 360 7.86 1,088 19.56 0.0008
2022-11-14 2022-09-30 13F LITTELFUSE COM 537008104 4,583 -9,160 -66.65 910 -73.94 0.0007
2022-08-15 2022-06-30 13F LITTELFUSE COM 537008104 13,743 8,761 175.85 3,492 181.39 0.0024
2022-05-16 2022-03-31 13F LITTELFUSE COM 537008104 4,982 2 0.04 1,241 -20.85 0.0006
2022-02-14 2021-12-31 13F LITTELFUSE COM 537008104 4,980 2,504 101.13 1,568 131.95 0.0007
2021-11-16 2021-09-30 13F LITTELFUSE COM 537008104 2,476 2,476 676 0.0003
2021-05-17 2021-03-31 13F LITTELFUSE COM 537008104 0 -3,640 -100.00 0 -100.00
2021-02-16 2020-12-31 13F LITTELFUSE COM 537008104 3,640 -111,721 -96.84 927 -95.47 0.0004
2020-11-16 2020-09-30 13F LITTELFUSE COM 537008104 115,361 -76,307 -39.81 20,458 -37.44 0.0107
2020-08-14 2020-06-30 13F LITTELFUSE COM 537008104 191,668 -42,352 -18.10 32,704 4.74 0.0184
2020-05-14 2020-03-31 13F LITTELFUSE COM 537008104 234,020 83,970 55.96 31,223 8.77 0.0215
2020-02-18 2019-12-31 13F LITTELFUSE COM 537008104 150,050 -20,768 -12.16 28,705 -5.23 0.0147
2019-11-14 2019-09-30 13F LITTELFUSE COM 537008104 170,818 99,852 140.70 30,288 141.24 0.0164
2019-07-31 2019-06-30 13F LITTELFUSE COM 537008104 70,966 68,246 2,509.04 12,555 2,431.25 0.0068
2019-04-30 2019-03-31 13F LITTELFUSE COM 537008104 2,720 564 26.16 496 34.05 0.0003
2019-02-06 2018-12-31 13F LITTELFUSE COM 537008104 2,156 85 4.10 370 -9.76 0.0002
2018-11-09 2018-09-30 13F LITTELFUSE COM 537008104 2,071 501 31.91 410 14.53 0.0002
2018-08-10 2018-06-30 13F LITTELFUSE COM 537008104 1,570 1,570 358 0.0002
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.