Ampco-Pittsburgh Corporation
US ˙ NYSE ˙ US0320371034

SecurityAP / Ampco-Pittsburgh Corporation
InstitutionRBF Capital, LLC
Latest Disclosed Ownership60,000 shares
Latest Disclosed Value $ 403,200
RBF Capital, LLC ownership in AP / Ampco-Pittsburgh Corporation

On May 18, 2026 - RBF Capital, LLC filed a 13F-HR/A form disclosing ownership of 60,000 shares of Ampco-Pittsburgh Corporation (US:AP) valued at $403,200 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 17, 2026 disclosing 60,000 shares of Ampco-Pittsburgh Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $702,000 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 AMPCO-PITTSBURG COM 032037103 60,000 0 0.00 403 26.33 0.0197
2026-05-14 2026-03-31 13F AMPCO-PITTSBURG COM 032037103 60,000 0 403 0.0211
2026-02-17 2025-12-31 13F/A-1 AMPCO-PITTSBURG COM 032037103 60,000 -30,950 -34.03 320 53.37 0.0142
2026-02-17 2025-12-31 13F AMPCO-PITTSBURG COM 032037103 60,000 -30,950 320 0.0142
2025-11-14 2025-09-30 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 208 -22.68 0.0093
2025-08-14 2025-06-30 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 269 36.55 0.0128
2025-05-15 2025-03-31 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 197 32.21 0.0119
2025-02-14 2024-12-31 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 149 4.20 0.0077
2024-11-14 2024-09-30 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 144 104.29 0.0072
2024-08-14 2024-06-30 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 70 -64.47 0.0040
2024-05-15 2024-03-31 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 197 -20.56 0.0110
2024-02-14 2023-12-31 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 248 3.77 0.0150
2023-11-14 2023-09-30 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 239 -15.85 0.0157
2023-08-14 2023-06-30 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 284 27.93 0.0177
2023-05-16 2023-03-31 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 223 -1.77 0.0162
2023-02-14 2022-12-31 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 226 -32.54 0.0170
2022-11-14 2022-09-30 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 335 -4.83 0.0282
2022-08-15 2022-06-30 13F AMPCO-PITTSBURG COM 032037103 90,950 0 0.00 352 -38.78 0.0245
2022-05-16 2022-03-31 13F AMPCO-PITTSBURG COM 032037103 90,950 -24,928 -21.51 575 -0.86 0.0368
2022-02-14 2021-12-31 13F AMPCO-PITTSBURG COM 032037103 115,878 -15,441 -11.76 580 -6.00 0.0357
2021-11-15 2021-09-30 13F AMPCO-PITTSBURG COM 032037103 131,319 -58,316 -30.75 617 -46.39 0.0344
2021-08-16 2021-06-30 13F AMPCO-PITTSBURG COM 032037103 189,635 0 0.00 1,151 -10.08 0.0643
2021-05-17 2021-03-31 13F AMPCO-PITTSBURG COM 032037103 189,635 -19,347 -9.26 1,280 11.69 0.0798
2021-03-02 2020-12-31 13F/A-1 AMPCO-PITTSBURG COM 032037103 208,982 -2,023 -0.96 1,146 65.13 0.0877
2021-02-11 2020-12-31 13F AMPCO-PITTSBURG COM 032037103 208,982 -2,023 1,146 99,407.9761
2020-11-16 2020-09-30 13F/A-1 AMPCO-PITTSBURG COM 032037103 211,005 94,480 81.08 694 93.85 0.0700
2020-11-16 2020-09-30 13F AMPCO-PITTSBURG COM 032037103 20,000 4,835
2020-08-14 2020-06-30 13F AMPCO-PITTSBURGH COM 032037103 116,525 21,398 22.49 358 50.42 0.0386
2020-05-18 2020-03-31 13F AMPCO-PITTSBURGH COM 032037103 95,127 -21,398 -18.36 238 -32.39 0.0311
2020-02-13 2019-12-31 13F AMPCO-PITTSBURGH COM 032037103 116,525 0 0.00 352 -17.95 0.0336
2019-11-13 2019-09-30 13F AMPCO-PITTSBURGH COM 032037103 116,525 0 0.00 429 -8.53 0.0481
2019-08-13 2019-06-30 13F AMPCO-PITTSBURGH COM 032037103 116,525 -1,112 -0.95 469 20.57 0.0472
2019-05-15 2019-03-31 13F AMPCO-PITTSBURGH COM 032037103 117,637 -2,800 -2.32 389 4.29 0.0457
2019-02-14 2018-12-31 13F AMPCO-PITTSBURGH COM 032037103 120,437 -1,617 -1.32 373 -48.19 0.0487
2018-11-14 2018-09-30 13F AMPCO-PITTSBURGH COM 032037103 122,054 8,493 7.48 720 -38.04 0.0781
2018-08-14 2018-06-30 13F AMPCO-PITTSBURGH COM 032037103 113,561 62,905 124.18 1,162 157.65 0.1366
2018-05-15 2018-03-31 13F AMPCO-PITTSBURGH COM 032037103 50,656 0 0.00 451 -28.18 0.0538
2018-02-14 2017-12-31 13F AMPCO-PITTSBURGH COM 032037103 50,656 0 0.00 628 -28.72 0.0693
2017-11-14 2017-09-30 13F AMPCO-PITTSBURGH COM 032037103 50,656 0 0.00 881 17.94 0.1114
2017-08-14 2017-06-30 13F AMPCO-PITTSBURGH COM 032037103 50,656 -19,344 -27.63 747 -24.09 0.0980
2017-05-15 2017-03-31 13F AMPCO-PITTSBURGH COM 032037103 70,000 0 0.00 984 -16.11 0.1347
2017-02-14 2016-12-31 13F AMPCO-PITTSBURGH COM 032037103 70,000 0 0.00 1,173 51.16 0.1672
2016-11-14 2016-09-30 13F AMPCO-PITTSBURGH COM 032037103 70,000 0 0.00 776 -2.02 0.1329
2016-08-15 2016-06-30 13F AMPCO-PITTSBURGH COM 032037103 70,000 -30,000 -30.00 792 -43.06 0.1574
2016-05-16 2016-03-31 13F AMPCO PITTSBURG CORP CMN Common Stock 032037103 100,000 0 0.00 1,391 35.58 0.2664
2016-02-16 2015-12-31 13F AMPCO PITTSBURG CORP CMN Common Stock 032037103 100,000 0 0.00 1,026 -5.96 0.1929
2015-11-16 2015-09-30 13F AMPCO PITTSBURG CORP CMN Common Stock 032037103 100,000 0 0.00 1,091 -27.84 0.2273
2015-08-14 2015-06-30 13F AMPCO PITTSBURG CORP CMN Common Stock 032037103 100,000 100,000 1,512 0.2856
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.