Littelfuse, Inc.
US ˙ NasdaqGS ˙ US5370081045

SecurityLFUS / Littelfuse, Inc.
InstitutionAmalgamated Bank
Latest Disclosed Ownership11,242 shares
Latest Disclosed Value $ 3,815
Amalgamated Bank reports 1.56% increase in ownership of LFUS / Littelfuse, Inc.

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 11,242 shares of Littelfuse, Inc. (US:LFUS) valued at $3,814,973 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 11,069 shares of Littelfuse, Inc.. This represents a change in shares of 1.56% during the quarter. The current value of the position is $5,448,435 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-08 2026-03-31 13F LITTELFUSE COM 537008104 11,242 173 1.56 4 50.00 0.0292
2026-02-05 2025-12-31 13F LITTELFUSE COM 537008104 11,069 -233 -2.06 3 0.00 0.0202
2025-10-29 2025-09-30 13F LITTELFUSE COM 537008104 11,302 26 0.23 3 0.00 0.0209
2025-08-04 2025-06-30 13F LITTELFUSE COM 537008104 11,276 -206 -1.79 3 0.00 0.0197
2025-04-25 2025-03-31 13F LITTELFUSE COM 537008104 11,482 -313 -2.65 2 0.00 0.0193
2025-02-04 2024-12-31 13F LITTELFUSE COM 537008104 11,795 0 0.00 3 -33.33 0.0228
2024-10-30 2024-09-30 13F LITTELFUSE COM 537008104 11,795 -2,564 -17.86 3 0.00 0.0258
2024-08-12 2024-06-30 13F LITTELFUSE COM 537008104 14,359 -586 -3.92 4 0.00 0.0313
2024-04-23 2024-03-31 13F LITTELFUSE COM 537008104 14,945 -1,386 -8.49 4 -25.00 0.0310
2024-02-06 2023-12-31 13F LITTELFUSE COM 537008104 16,331 206 1.28 4 33.33 0.0349
2023-11-08 2023-09-30 13F LITTELFUSE COM 537008104 16,125 15 0.09 4 -25.00 0.0340
2023-08-11 2023-06-30 13F LITTELFUSE COM 537008104 16,110 -826 -4.88 5 0.00 0.0380
2023-05-02 2023-03-31 13F LITTELFUSE COM 537008104 16,936 -2,189 -11.45 5 0.00 0.0387
2023-02-10 2022-12-31 13F LITTELFUSE COM 537008104 19,125 1,492 8.46 4 -99.89 0.0376
2022-11-09 2022-09-30 13F LITTELFUSE COM 537008104 17,633 -524 -2.89 3,504 -24.04 0.0338
2022-08-15 2022-06-30 13F LITTELFUSE COM 537008104 18,157 1,219 7.20 4,613 9.18 0.0430
2022-08-25 2022-03-31 13F/A-1 LITTELFUSE COM 537008104 16,938 -599 -3.42 4,225 -23.45 0.0328
2022-06-30 2022-03-31 13F LITTELFUSE COM 537008104 16,938 -599 4,225 0.0336
2022-02-15 2021-12-31 13F/A-1 LITTELFUSE COM 537008104 17,537 -619 -3.41 5,519 11.25 0.0407
2022-02-15 2021-12-31 13F LITTELFUSE COM 537008104 17,537 -619 5,519 0.0407
2021-10-29 2021-09-30 13F LITTELFUSE COM 537008104 18,156 -1,780 -8.93 4,961 -2.32 0.0419
2021-08-16 2021-06-30 13F LITTELFUSE COM 537008104 19,936 16,989 576.48 5,079 551.99 0.0407
2021-05-13 2021-03-31 13F LITTELFUSE COM 537008104 2,947 -193 -6.15 779 -2.62 0.0292
2021-02-12 2020-12-31 13F LITTELFUSE COM 537008104 3,140 8 0.26 800 44.14 0.0303
2020-10-30 2020-09-30 13F LITTELFUSE COM 537008104 3,132 -13 -0.41 555 3.35 0.0241
2020-08-10 2020-06-30 13F LITTELFUSE COM 537008104 3,145 -2,213 -41.30 537 -24.90 0.0249
2020-05-13 2020-03-31 13F LITTELFUSE COM 537008104 5,358 -103 -1.89 715 -31.58 0.0175
2020-02-13 2019-12-31 13F LITTELFUSE COM 537008104 5,461 494 9.95 1,045 18.62 0.0192
2019-11-13 2019-09-30 13F LITTELFUSE COM 537008104 4,967 -72 -1.43 881 -1.12 0.0185
2019-08-14 2019-06-30 13F LITTELFUSE COM 537008104 5,039 -536 -9.61 891 -12.39 0.0208
2019-05-15 2019-03-31 13F LITTELFUSE COM 537008104 5,575 82 1.49 1,017 7.96 0.0246
2019-02-15 2018-12-31 13F LITTELFUSE COM 537008104 5,493 1,721 45.63 942 26.27 0.0267
2018-11-14 2018-09-30 13F LITTELFUSE COM 537008104 3,772 -1,940 -33.96 746 -42.75 0.0184
2018-07-18 2018-06-30 13F LITTELFUSE COM 537008104 5,712 2,230 64.04 1,303 79.72 0.0318
2018-05-22 2018-03-31 13F LITTELFUSE COM 537008104 3,482 187 5.68 725 11.20 0.0192
2018-02-13 2017-12-31 13F LITTELFUSE COM 537008104 3,295 200 6.46 652 7.59 0.0176
2017-11-09 2017-09-30 13F LITTELFUSE COM 537008104 3,095 -132 -4.09 606 13.91 0.0189
2017-08-10 2017-06-30 13F LITTELFUSE COM 537008104 3,227 182 5.98 532 9.24 0.0174
2017-05-12 2017-03-31 13F LITTELFUSE COM 537008104 3,045 -8 -0.26 487 5.18 0.0242
2017-02-14 2016-12-31 13F LITTELFUSE COM 537008104 3,053 494 19.30 463 40.30 0.0209
2016-11-15 2016-09-30 13F/A-1 LITTELFUSE COM 537008104 2,559 0 0.00 330 9.27 0.0191
2016-08-16 2016-06-30 13F LITTELFUSE COM 537008104 2,559 176 7.39 302 3.07 0.0175
2016-05-11 2016-03-31 13F LITTELFUSE COM 537008104 2,383 214 9.87 293 26.29 0.0285
2016-02-10 2015-12-31 13F LITTELFUSE COM 537008104 2,169 -203 -8.56 232 7.41 0.0286
2015-11-04 2015-09-30 13F LITTELFUSE COM 537008104 2,372 38 1.63 216 -2.26 0.0227
2015-07-10 2015-06-30 13F LITTELFUSE COM 537008104 2,334 315 15.60 221 9.95 0.0217
2015-04-22 2015-03-31 13F LITTELFUSE COM 537008104 2,019 2,019 201 0.0245
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.