L.B. Foster Company
US ˙ NasdaqGS ˙ US3500601097

SecurityFSTR / L.B. Foster Company
InstitutionNorthern Trust Corp
Latest Disclosed Ownership78,200 shares
Latest Disclosed Value $ 2,181,780
Northern Trust Corp reports 4.03% increase in ownership of FSTR / L.B. Foster Company

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 78,200 shares of L.B. Foster Company (US:FSTR) valued at $2,181,780 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 75,174 shares of L.B. Foster Company. This represents a change in shares of 4.03% during the quarter. The current value of the position is $3,285,182 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)
2026-05-14 2026-03-31 13F FOSTER L B COM 350060109 78,200 3,026 4.03 2,182 7.70 0.0001
2026-02-17 2025-12-31 13F FOSTER L B COM 350060109 75,174 -5,888 -7.26 2,026 -7.28 0.0001
2025-11-14 2025-09-30 13F FOSTER L B COM 350060109 81,062 -2,336 -2.80 2,185 19.80 0.0001
2025-08-13 2025-06-30 13F FOSTER L B COM 350060109 83,398 6,436 8.36 1,824 20.41 0.0003
2025-05-13 2025-03-31 13F FOSTER L B COM 350060109 76,962 -3,148 -3.93 1,515 -29.71 0.0002
2025-02-14 2024-12-31 13F FOSTER L B COM 350060109 80,110 1,392 1.77 2,155 33.96 0.0003
2024-11-13 2024-09-30 13F FOSTER L B COM 350060109 78,718 49,458 169.03 1,608 155.64 0.0003
2024-08-14 2024-06-30 13F FOSTER L B COM 350060109 29,260 3,799 14.92 630 -9.50 0.0001
2024-05-14 2024-03-31 13F FOSTER L B COM 350060109 25,461 355 1.41 695 25.91 0.0001
2024-02-13 2023-12-31 13F FOSTER L B COM 350060109 25,106 1,273 5.34 552 22.67 0.0001
2023-11-13 2023-09-30 13F FOSTER L B COM 350060109 23,833 -84 -0.35 451 31.96 0.0001
2023-08-11 2023-06-30 13F FOSTER L B COM 350060109 23,917 476 2.03 342 26.77 0.0001
2023-05-15 2023-03-31 13F FOSTER L B COM 350060109 23,441 -1,507 -6.04 269 11.62 0.0001
2023-02-13 2022-12-31 13F FOSTER L B COM 350060109 24,948 -10 -0.04 241 -1.23 0.0001
2022-11-14 2022-09-30 13F FOSTER L B COM 350060109 24,958 295 1.20 244 -23.03 0.0001
2022-08-12 2022-06-30 13F FOSTER L B COM 350060109 24,663 -28,600 -53.70 317 -61.29 0.0001
2022-05-13 2022-03-31 13F FOSTER L B COM 350060109 53,263 -1,164 -2.14 819 9.49 0.0001
2022-02-08 2021-12-31 13F FOSTER L B COM 350060109 54,427 -4,915 -8.28 748 -18.61 0.0001
2021-11-15 2021-09-30 13F FOSTER L B COM 350060109 59,342 1,685 2.92 919 -14.51 0.0002
2021-08-13 2021-06-30 13F FOSTER L B COM 350060109 57,657 -76,661 -57.07 1,075 -55.30 0.0002
2021-05-12 2021-03-31 13F FOSTER L B COM 350060109 134,318 -42,565 -24.06 2,405 -9.62 0.0004
2021-02-11 2020-12-31 13F FOSTER L B COM 350060109 176,883 -7,038 -3.83 2,661 7.82 0.0005
2020-11-16 2020-09-30 13F FOSTER L B COM 350060109 183,921 -6,567 -3.45 2,468 1.48 0.0005
2020-08-14 2020-06-30 13F FOSTER L B COM 350060109 190,488 61,306 47.46 2,432 52.38 0.0006
2020-05-14 2020-03-31 13F FOSTER L B COM 350060109 129,182 3,234 2.57 1,596 -34.62 0.0005
2020-02-14 2019-12-31 13F FOSTER L B COM 350060109 125,948 -1,887 -1.48 2,441 -11.88 0.0005
2019-11-13 2019-09-30 13F FOSTER L B COM 350060109 127,835 3,752 3.02 2,770 -18.36 0.0007
2019-08-13 2019-06-30 13F FOSTER L B COM 350060109 124,083 1,872 1.53 3,393 47.52 0.0008
2019-05-13 2019-03-31 13F FOSTER L B COM 350060109 122,211 -751 -0.61 2,300 17.65 0.0006
2019-02-12 2018-12-31 13F FOSTER L B COM 350060109 122,962 1,025 0.84 1,955 -21.96 0.0005
2018-11-14 2018-09-30 13F FOSTER L B COM 350060109 121,937 1,691 1.41 2,505 -9.24 0.0006
2018-09-18 2018-06-30 13F/A-1 FOSTER L B COM 350060109 120,246 10,653 9.72 2,760 6.94 0.0007
2018-08-14 2018-06-30 13F FOSTER L B COM 350060109 120,915 11,322 2,775
2018-05-09 2018-03-31 13F FOSTER L B COM 350060109 109,593 2,111 1.96 2,581 -11.55 0.0007
2018-02-14 2017-12-31 13F FOSTER L B COM 350060109 107,482 -1,099 -1.01 2,918 18.09 0.0007
2017-11-13 2017-09-30 13F FOSTER L B COM 350060109 108,581 -556 -0.51 2,471 5.55 0.0006
2017-08-11 2017-06-30 13F FOSTER L B COM 350060109 109,137 74,981 219.53 2,341 448.24 0.0007
2017-05-12 2017-03-31 13F FOSTER L B COM 350060109 34,156 815 2.44 427 -5.74 0.0001
2017-02-13 2016-12-31 13F FOSTER L B COM 350060109 33,341 520 1.58 453 14.97 0.0001
2016-11-09 2016-09-30 13F FOSTER L B COM 350060109 32,821 5,034 18.12 394 30.03 0.0001
2016-08-12 2016-06-30 13F FOSTER L B COM 350060109 27,787 -84,804 -75.32 303 -85.04 0.0001
2016-08-19 2016-03-31 13F/A-1 FOSTER L B COM 350060109 112,591 1,928 1.74 2,026 33.99 0.0007
2016-05-13 2016-03-31 13F Foster L B COMM 350060109 112,590 2,045
2016-02-12 2015-12-31 13F Foster L B COMM 350060109 110,663 -28,674 -20.58 1,512 -11.63 0.0005
2015-11-12 2015-09-30 13F Foster L B COMM 350060109 139,337 2,496 1.82 1,711 -63.87 0.0006
2015-08-13 2015-06-30 13F FOSTER L B COM 350060109 136,841 -1,351 -0.98 4,736 -27.80 0.0032
2015-08-13 2015-06-30 13F Foster L B COMM 035006010 7,053 -131,139 244 0.0002
2015-05-14 2015-03-31 13F Foster L B COMM 350060109 138,192 976 0.71 6,560 -1.58 0.0020
2015-02-12 2014-12-31 13F Foster L B COM 350060109 137,216 -6,520 -4.54 6,665 0.92 0.0020
2014-11-13 2014-09-30 13F Foster L B COMM 350060109 143,736 -5,258 -3.53 6,604 -18.11 0.0021
2014-08-14 2014-06-30 13F FOSTER L B com 350060109 148,994 -21,741 -12.73 8,064 0.80 0.0025
2014-05-14 2014-03-31 13F FOSTER L B COMM 350060109 170,735 3,263 1.95 8,000 1.01 0.0025
2014-02-21 2013-12-31 13F/A-1 FOSTER L B COM 350060109 167,472 1,169 0.70 7,920 4.13 0.0025
2014-02-12 2013-12-31 13F FOSTER L B COM 350060109 167,472 7,920
2013-11-13 2013-09-30 13F FOSTER L B COM 350060109 166,303 3,259 2.00 7,606 8.06 0.0027
2013-08-09 2013-06-30 13F FOSTER L B COM 350060109 163,044 163,044 7,039 0.0026
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.