Littelfuse, Inc.
US ˙ NasdaqGS ˙ US5370081045

SecurityLFUS / Littelfuse, Inc.
InstitutionBrown Advisory Inc
Latest Disclosed Ownership58,176 shares
Latest Disclosed Value $ 19,742,345
Brown Advisory Inc reports 24.42% increase in ownership of LFUS / Littelfuse, Inc.

On May 15, 2026 - Brown Advisory Inc filed a 13F-HR form disclosing ownership of 58,176 shares of Littelfuse, Inc. (US:LFUS) valued at $19,742,026 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 46,757 shares of Littelfuse, Inc.. This represents a change in shares of 24.42% during the quarter. The current value of the position is $28,194,998 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)
2026-05-15 2026-03-31 13F LITTELFUSE COM 537008104 58,176 11,419 24.42 19,742 66.95 0.0145
2026-02-13 2025-12-31 13F LITTELFUSE COM 537008104 46,757 -52,841 -53.05 11,826 -54.16 0.0165
2025-11-14 2025-09-30 13F LITTELFUSE COM 537008104 99,598 -167,243 -62.68 25,797 -57.36 0.0336
2025-08-13 2025-06-30 13F LITTELFUSE COM 537008104 266,841 -83,902 -23.92 60,501 -12.33 0.0796
2025-04-30 2025-03-31 13F LITTELFUSE COM 537008104 350,743 -10,800 -2.99 69,005 -19.01 0.0986
2025-02-14 2024-12-31 13F LITTELFUSE COM 537008104 361,543 -2,554 -0.70 85,198 -11.78 0.1081
2024-11-13 2024-09-30 13F LITTELFUSE COM 537008104 364,097 17,034 4.91 96,577 8.87 0.1213
2024-08-14 2024-06-30 13F LITTELFUSE COM 537008104 347,063 595 0.17 88,706 5.64 0.1160
2024-04-24 2024-03-31 13F LITTELFUSE COM 537008104 346,468 17,532 5.33 83,966 -4.59 0.1122
2024-02-08 2023-12-31 13F LITTELFUSE COM 537008104 328,936 10,750 3.38 88,010 11.84 0.1237
2023-10-25 2023-09-30 13F LITTELFUSE COM 537008104 318,186 735 0.23 78,694 -14.90 0.1292
2023-07-31 2023-06-30 13F LITTELFUSE COM 537008104 317,451 -1,800 -0.56 92,477 8.05 0.1445
2023-05-08 2023-03-31 13F LITTELFUSE COM 537008104 319,251 2,639 0.83 85,588 22.76 0.1449
2023-02-13 2022-12-31 13F LITTELFUSE COM 537008104 316,612 -8,713 -2.68 69,718 7.86 0.1295
2022-11-14 2022-09-30 13F LITTELFUSE COM 537008104 325,325 -44,128 -11.94 64,639 -31.13 0.1257
2022-11-14 2022-06-30 13F/A-2 LITTELFUSE COM 537008104 369,453 3,007 0.82 93,856 2.69 0.1765
2022-09-13 2022-06-30 13F/A-1 LITTELFUSE COM 537008104 357,039 2,961 90,702 0.1568
2022-08-02 2022-06-30 13F LITTELFUSE COM 537008104 356,809 2,796 90,754 0.1458
2022-11-14 2022-03-31 13F/A-2 LITTELFUSE COM 537008104 366,446 24,261 7.09 91,395 -15.12 0.1362
2022-09-13 2022-03-31 13F/A-1 LITTELFUSE COM 537008104 354,078 11,893 88,311 0.1240
2022-05-09 2022-03-31 13F LITTELFUSE COM 537008104 354,013 11,828 88,413 0.1202
2022-01-27 2021-12-31 13F LITTELFUSE COM 537008104 342,185 11,256 3.40 107,679 19.07 0.1334
2021-11-12 2021-09-30 13F LITTELFUSE COM 537008104 330,929 5,098 1.56 90,433 8.93 0.1335
2021-07-29 2021-06-30 13F LITTELFUSE COM 537008104 325,831 14,963 4.81 83,018 0.99 0.1251
2021-05-14 2021-03-31 13F LITTELFUSE COM 537008104 310,868 7,506 2.47 82,205 6.41 0.1406
2021-02-12 2020-12-31 13F LITTELFUSE COM 537008104 303,362 97,928 47.67 77,254 112.05 0.1371
2020-11-16 2020-09-30 13F LITTELFUSE COM 537008104 205,434 9,071 4.62 36,432 8.74 0.0753
2020-08-14 2020-06-30 13F LITTELFUSE COM 537008104 196,363 -39,300 -16.68 33,505 6.56 0.0781
2020-05-15 2020-03-31 13F LITTELFUSE COM 537008104 235,663 -61,475 -20.69 31,442 -44.68 0.0963
2020-02-14 2019-12-31 13F LITTELFUSE COM 537008104 297,138 2,093 0.71 56,841 8.65 0.1442
2019-11-14 2019-09-30 13F LITTELFUSE COM 537008104 295,045 13,231 4.69 52,317 4.94 0.1468
2019-08-12 2019-06-30 13F LITTELFUSE COM 537008104 281,814 1,610 0.57 49,856 -2.50 0.1426
2019-05-15 2019-03-31 13F LITTELFUSE COM 537008104 280,204 73,519 35.57 51,133 44.27 0.1450
2019-02-13 2018-12-31 13F LITTELFUSE COM 537008104 206,685 19,941 10.68 35,442 -4.10 0.1191
2018-11-13 2018-09-30 13F LITTELFUSE COM 537008104 186,744 14,852 8.64 36,956 -5.78 0.1052
2018-08-10 2018-06-30 13F LITTELFUSE COM 537008104 171,892 50,474 41.57 39,222 55.17 0.1206
2018-06-28 2018-03-31 13F/A-1 LITTELFUSE COM 537008104 121,418 60,530 99.41 25,277 109.84 0.0817
2018-05-14 2018-03-31 13F LITTELFUSE COM 537008104 68,677 7,789 14,297
2018-02-12 2017-12-31 13F LITTELFUSE COM 537008104 60,888 60,888 12,046 0.0381
2015-11-13 2015-09-30 13F LITTELFUSE COM 537008104 0 -3,100 -100.00 0 -100.00
2015-08-11 2015-06-30 13F LITTELFUSE COM 537008104 3,100 0 0.00 294 -4.55 0.0010
2015-05-14 2015-03-31 13F LITTELFUSE COM 537008104 3,100 0 0.00 308 2.67 0.0010
2015-02-13 2014-12-31 13F/A-1 LITTELFUSE COM 537008104 3,100 3,100 300 0.0009
2015-02-09 2014-12-31 13F LITTELFUSE COM 537008104 3,100 300
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.