Ampco-Pittsburgh Corporation
US ˙ NYSE ˙ US0320371034

SecurityAP / Ampco-Pittsburgh Corporation
InstitutionMorgan Stanley
Latest Disclosed Ownership9,581 shares
Latest Disclosed Value $ 64,386
Morgan Stanley reports 39.44% increase in ownership of AP / Ampco-Pittsburgh Corporation

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 9,581 shares of Ampco-Pittsburgh Corporation (US:AP) valued at $64,384 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 6,871 shares of Ampco-Pittsburgh Corporation. This represents a change in shares of 39.44% during the quarter. The current value of the position is $106,062 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 AMPCO-PITTSBURG COM 032037103 9,581 2,710 39.44 64 77.78 0.0000
2026-05-27 2025-12-31 13F/A-1 AMPCO-PITTSBURG COM 032037103 6,871 628 10.06 37 157.14 0.0000
2026-02-13 2025-12-31 13F AMPCO-PITTSBURG COM 032037103 6,871 628 37 0.0000
2026-05-27 2025-09-30 13F/A-1 AMPCO-PITTSBURG COM 032037103 6,243 0 0.00 14 -22.22 0.0000
2025-11-14 2025-09-30 13F AMPCO-PITTSBURG COM 032037103 6,243 0 14 0.0000
2025-08-15 2025-06-30 13F AMPCO-PITTSBURG COM 032037103 6,243 892 16.67 18 63.64 0.0000
2025-05-15 2025-03-31 13F AMPCO-PITTSBURG COM 032037103 5,351 0 0.00 12 0.00 0.0000
2025-05-15 2024-12-31 13F/A-1 AMPCO-PITTSBURG COM 032037103 5,351 0 0.00 11 10.00 0.0000
2025-02-14 2024-12-31 13F AMPCO-PITTSBURG COM 032037103 5,351 0 11 0.0000
2025-05-14 2024-09-30 13F/A-2 AMPCO-PITTSBURG COM 032037103 5,351 0 0.00 11 150.00 0.0000
2025-02-14 2024-09-30 13F/A-1 AMPCO-PITTSBURG COM 032037103 5,351 0 11 0.0000
2024-11-14 2024-09-30 13F AMPCO-PITTSBURG COM 032037103 5,351 0 11 0.0000
2025-05-14 2024-06-30 13F/A-2 AMPCO-PITTSBURG COM 032037103 5,351 -99 -1.82 4 -63.64 0.0000
2024-10-17 2024-06-30 13F/A-1 AMPCO-PITTSBURG COM 032037103 5,351 -99 4 0.0000
2024-08-14 2024-06-30 13F AMPCO-PITTSBURG COM 032037103 5,351 -99 4 0.0000
2024-10-17 2024-03-31 13F/A-2 AMPCO-PITTSBURG COM 032037103 5,450 -3,890 -41.65 12 -56.00 0.0000
2024-08-16 2024-03-31 13F/A-1 AMPCO-PITTSBURG COM 032037103 5,450 -3,890 12 0.0000
2024-05-15 2024-03-31 13F AMPCO-PITTSBURG COM 032037103 5,450 -3,890 12 0.0000
2024-08-16 2023-12-31 13F/A-1 AMPCO-PITTSBURG COM 032037103 9,340 -584 -5.88 25 -3.85 0.0000
2024-02-13 2023-12-31 13F AMPCO-PITTSBURG COM 032037103 9,340 -584 25 0.0000
2023-11-15 2023-09-30 13F AMPCO-PITTSBURG COM 032037103 9,924 0 0.00 26 -16.13 0.0000
2023-08-14 2023-06-30 13F AMPCO-PITTSBURG COM 032037103 9,924 -1,200 -10.79 32 14.81 0.0000
2023-05-15 2023-03-31 13F AMPCO-PITTSBURG COM 032037103 11,124 -91 -0.81 27 -3.57 0.0000
2023-02-14 2022-12-31 13F AMPCO-PITTSBURG COM 032037103 11,215 1 0.01 28 -33.33 0.0000
2022-11-14 2022-09-30 13F AMPCO-PITTSBURG COM 032037103 11,214 -1,167 -9.43 42 -12.50 0.0000
2022-10-27 2022-06-30 13F/A-1 AMPCO-PITTSBURG COM 032037103 12,381 -726 -5.54 48 -42.17 0.0000
2022-08-15 2022-06-30 13F AMPCO-PITTSBURG COM 032037103 12,381 -726 48 0.0000
2022-10-27 2022-03-31 13F/A-1 AMPCO-PITTSBURG COM 032037103 13,107 -390 -2.89 83 23.88 0.0000
2022-05-13 2022-03-31 13F AMPCO-PITTSBURG COM 032037103 13,107 -390 83 0.0000
2022-02-14 2021-12-31 13F AMPCO-PITTSBURG COM 032037103 13,497 -1,330 -8.97 67 -4.29 0.0000
2021-11-15 2021-09-30 13F AMPCO-PITTSBURG COM 032037103 14,827 1,965 15.28 70 -10.26 0.0000
2021-08-23 2021-06-30 13F/A-1 AMPCO-PITTSBURG COM 032037103 12,862 -779 -5.71 78 -15.22 0.0000
2021-08-16 2021-06-30 13F AMPCO-PITTSBURG COM 032037103 12,862 -779 78 0.0000
2021-05-17 2021-03-31 13F AMPCO-PITTSBURG COM 032037103 13,641 881 6.90 92 31.43 0.0000
2021-02-16 2020-12-31 13F AMPCO-PITTSBURG COM 032037103 12,760 1,220 10.57 70 84.21 0.0000
2020-11-13 2020-09-30 13F AMPCO-PITTSBURG COM 032037103 11,540 -900 -7.23 38 0.00 0.0000
2020-08-14 2020-06-30 13F AMPCO-PITTSBURGH COM 032037103 12,440 -3,500 -21.96 38 -5.00 0.0000
2020-05-26 2020-03-31 13F/A-1 AMPCO-PITTSBURGH COM 032037103 15,940 5,500 52.68 40 29.03 0.0000
2020-05-15 2020-03-31 13F AMPCO-PITTSBURGH COM 032037103 15,940 5,500 40 3.0728
2020-02-14 2019-12-31 13F AMPCO-PITTSBURGH COM 032037103 10,440 -1,880 -15.26 31 -31.11 0.0000
2019-11-14 2019-09-30 13F AMPCO-PITTSBURGH COM 032037103 12,320 -300 -2.38 45 -11.76 0.0000
2019-08-14 2019-06-30 13F AMPCO-PITTSBURGH COM 032037103 12,620 0 0.00 51 21.43 0.0000
2019-05-15 2019-03-31 13F AMPCO-PITTSBURGH COM 032037103 12,620 0 0.00 42 7.69 0.0000
2019-02-14 2018-12-31 13F AMPCO-PITTSBURGH COM 032037103 12,620 -12,130 -49.01 39 -73.29 0.0000
2019-04-23 2018-09-30 13F/A-2 AMPCO-PITTSBURGH COM 032037103 24,750 -4,818 -16.29 146 -51.82 0.0000
2018-11-20 2018-09-30 13F/A-1 AMPCO-PITTSBURGH COM 032037103 24,750 0 146 0.0000
2018-11-14 2018-09-30 13F AMPCO-PITTSBURGH COM 032037103 24,750 -4,818 146
2019-04-23 2018-06-30 13F/A-1 AMPCO-PITTSBURGH COM 032037103 29,568 -313 -1.05 303 13.91 0.0001
2018-08-14 2018-06-30 13F AMPCO-PITTSBURGH COM 032037103 29,568 -313 303
2019-04-23 2018-03-31 13F/A-1 AMPCO-PITTSBURGH COM 032037103 29,881 4,553 17.98 266 -15.29 0.0001
2018-05-14 2018-03-31 13F AMPCO-PITTSBURGH COM 032037103 29,881 4,553 266
2019-04-23 2017-12-31 13F/A-1 AMPCO-PITTSBURGH COM 032037103 25,328 7,627 43.09 314 1.95 0.0001
2018-02-14 2017-12-31 13F AMPCO-PITTSBURGH COM 032037103 25,328 7,627 314
2017-11-14 2017-09-30 13F AMPCO-PITTSBURGH COM 032037103 17,701 3,758 26.95 308 49.51 0.0001
2017-08-11 2017-06-30 13F AMPCO-PITTSBURGH COM 032037103 13,943 -3,614 -20.58 206 -16.60 0.0001
2017-05-22 2017-03-31 13F/A-1 AMPCO-PITTSBURGH COM 032037103 17,557 -13,661 -43.76 247 -52.77 0.0001
2017-05-12 2017-03-31 13F AMPCO-PITTSBURGH COM 032037103 17,557 247
2017-02-22 2016-12-31 13F/A-1 AMPCO-PITTSBURGH COM 032037103 31,218 20,104 180.89 523 325.20 0.0002
2017-02-13 2016-12-31 13F AMPCO-PITTSBURGH COM 032037103 31,218 523
2016-11-10 2016-09-30 13F AMPCO-PITTSBURGH COM 032037103 11,114 586 5.57 123 3.36 0.0000
2016-08-12 2016-06-30 13F AMPCO-PITTSBURGH COM 032037103 10,528 -35,673 -77.21 119 -81.49 0.0000
2016-05-12 2016-03-31 13F AMPCO-PITTSBURGH COM 032037103 46,201 -10,205 -18.09 643 11.05 0.0002
2016-02-09 2015-12-31 13F AMPCO-PITTSBURGH COM 032037103 56,406 543 0.97 579 -4.93 0.0002
2016-02-08 2015-09-30 13F/A-1 AMPCO-PITTSBURGH COM 032037103 55,863 -17,024 -23.36 609 -44.74 0.0002
2015-11-09 2015-09-30 13F AMPCO-PITTSBURGH COM 032037103 55,863 609
2015-08-12 2015-06-30 13F AMPCO-PITTSBURGH COM 032037103 72,887 42,533 140.12 1,102 107.92 0.0004
2015-05-14 2015-03-31 13F AMPCO-PITTSBURGH COM 032037103 30,354 -5,168 -14.55 530 -22.51 0.0002
2015-02-13 2014-12-31 13F AMPCO-PITTSBURGH COM 032037103 35,522 25,748 263.43 684 248.98 0.0003
2014-12-16 2014-09-30 13F/A-1 AMPCO-PITTSBURGH COM 032037103 9,774 -12,080 -55.28 196 -60.88 0.0001
2014-11-14 2014-09-30 13F AMPCO-PITTSBURGH COM 032037103 9,774 196
2014-08-12 2014-06-30 13F AMPCO-PITTSBURGH COM 032037103 21,854 -1,510 -6.46 501 13.35 0.0009
2014-05-13 2014-03-31 13F AMPCO-PITTSBURGH COM 032037103 23,364 691 3.05 442 0.23 0.0002
2014-02-13 2013-12-31 13F AMPCO-PITTSBURGH COM 032037103 22,673 -2,390 -9.54 441 -1.78 0.0002
2013-11-13 2013-09-30 13F AMPCO-PITTSBURGH CORP COM S COM 032037103 25,063 7,446 42.27 449 35.65 0.0002
2013-08-08 2013-06-30 13F AMPCO-PITTSBURGH CORP COM S COM 032037103 17,617 17,617 331 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.