Ampco-Pittsburgh Corporation
US ˙ NYSE ˙ US0320371034

SecurityAP / Ampco-Pittsburgh Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership648,353 shares
Ownership 3.50%
Dimensional Fund Advisors Lp ownership in AP / Ampco-Pittsburgh Corporation

2021-02-12 - Dimensional Fund Advisors Lp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 648,353 shares of Ampco-Pittsburgh Corporation (US:AP). This represents 3.5 percent ownership of the company. In their previous filing dated 2020-02-12 , Dimensional Fund Advisors Lp had reported owning 720,251 shares, indicating a decrease of -9.98 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2021-02-12 2021-02-12 13G/A 720,251 648,353 -9.98 3.50 -38.60
2020-02-12 2020-02-12 13G/A 760,578 720,251 -5.30 5.70 -6.40
2019-02-08 2019-02-08 13G/A 673,086 760,578 13.00 6.09 11.74
2018-02-09 2018-02-09 13G 673,086 5.45

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-05-07 2026-03-31 13F AMPCO-PITTSBURG COM 032037103 355,427 20,454 6.11 2,388 33.78 0.0001
2026-02-12 2025-12-31 13F AMPCO-PITTSBURG COM 032037103 334,973 -1,147 -0.34 1,786 132.12 0.0004
2025-11-12 2025-09-30 13F AMPCO-PITTSBURG COM 032037103 336,120 -1,724 -0.51 770 -23.10 0.0002
2025-08-12 2025-06-30 13F AMPCO-PITTSBURG COM 032037103 337,844 27,307 8.79 1,000 48.59 0.0002
2025-05-13 2025-03-31 13F AMPCO-PITTSBURG COM 032037103 310,537 18,227 6.24 674 10.15 0.0002
2025-02-13 2024-12-31 13F AMPCO-PITTSBURG COM 032037103 292,310 -22,535 -7.16 611 -2.86 0.0001
2024-11-07 2024-09-30 13F AMPCO-PITTSBURG COM 032037103 314,845 -105,452 -25.09 630 94.74 0.0002
2024-08-09 2024-06-30 13F AMPCO-PITTSBURG COM 032037103 420,297 -196,066 -31.81 324 -75.84 0.0001
2024-05-10 2024-03-31 13F AMPCO-PITTSBURG COM 032037103 616,363 -14,794 -2.34 1,338 -22.40 0.0004
2024-02-07 2023-12-31 13F AMPCO-PITTSBURG COM 032037103 631,157 -942 -0.15 1,723 3.67 0.0005
2023-11-09 2023-09-30 13F AMPCO-PITTSBURG COM 032037103 632,099 -13,104 -2.03 1,662 -18.97 0.0005
2023-08-09 2023-06-30 13F AMPCO-PITTSBURG COM 032037103 645,203 -4,228 -0.65 2,052 28.91 0.0007
2023-05-12 2023-03-31 13F AMPCO-PITTSBURG COM 032037103 649,431 -11,337 -1.72 1,591 159,000.00 0.0005
2023-02-09 2022-12-31 13F AMPCO-PITTSBURG COM 032037103 660,768 1,505 0.23 2 -99.96 0.0005
2022-11-10 2022-09-30 13F AMPCO-PITTSBURG COM 032037103 659,263 -2,410 -0.36 2,425 -5.31 0.0009
2022-08-12 2022-06-30 13F AMPCO-PITTSBURG COM 032037103 661,673 1,225 0.19 2,561 -38.54 0.0009
2022-05-13 2022-03-31 13F AMPCO-PITTSBURG COM 032037103 660,448 13,025 2.01 4,167 28.73 0.0013
2022-02-09 2021-12-31 13F AMPCO-PITTSBURG COM 032037103 647,423 -32,238 -4.74 3,237 1.35 0.0010
2021-11-12 2021-09-30 13F AMPCO-PITTSBURG COM 032037103 679,661 -43,485 -6.01 3,194 -27.24 0.0010
2021-08-12 2021-06-30 13F AMPCO-PITTSBURG COM 032037103 723,146 20,667 2.94 4,390 -7.42 0.0014
2021-05-14 2021-03-31 13F AMPCO-PITTSBURG COM 032037103 702,479 54,126 8.35 4,742 33.46 0.0016
2021-03-08 2020-12-31 13F/A-2 AMPCO-PITTSBURG COM 032037103 648,353 -15,001 -2.26 3,553 62.76 0.0013
2021-02-11 2020-12-31 13F AMPCO-PITTSBURG COM 032037103 648,353 -15,001 3,553 1,283.1547
2020-11-12 2020-09-30 13F AMPCO-PITTSBURG COM 032037103 663,354 -31,890 -4.59 2,183 2.30 0.0009
2020-08-13 2020-06-30 13F AMPCO-PITTSBURGH COM 032037103 695,244 -16,272 -2.29 2,134 19.96 0.0009
2020-05-14 2020-03-31 13F AMPCO-PITTSBURGH COM 032037103 711,516 -8,735 -1.21 1,779 -17.94 0.0009
2020-02-14 2019-12-31 13F AMPCO-PITTSBURGH COM 032037103 720,251 -25,381 -3.40 2,168 -20.99 0.0008
2019-11-12 2019-09-30 13F AMPCO-PITTSBURGH COM 032037103 745,632 -7,227 -0.96 2,744 -9.56 0.0011
2019-08-13 2019-06-30 13F AMPCO-PITTSBURGH COM 032037103 752,859 -100 -0.01 3,034 22.09 0.0012
2019-08-12 2019-03-31 13F/A-2 AMPCO-PITTSBURGH COM 032037103 752,959 -7,619 -1.00 2,485 5.39 0.0010
2019-05-10 2019-03-31 13F AMPCO-PITTSBURGH COM 032037103 752,959 -7,619 2,485
2019-02-26 2018-12-31 13F/A-1 AMPCO-PITTSBURGH COM 032037103 760,578 -15,004 -1.93 2,358 -48.47 0.0011
2019-02-13 2018-12-31 13F AMPCO-PITTSBURGH COM 032037103 760,578 -15,004 2,358
2018-11-13 2018-09-30 13F AMPCO-PITTSBURGH COM 032037103 775,582 28,258 3.78 4,576 -40.26 0.0017
2018-08-10 2018-06-30 13F AMPCO-PITTSBURGH COM 032037103 747,324 31,561 4.41 7,660 20.25 0.0031
2018-05-11 2018-03-31 13F AMPCO-PITTSBURGH COM 032037103 715,763 42,677 6.34 6,370 -23.68 0.0027
2018-02-12 2017-12-31 13F AMPCO-PITTSBURGH COM 032037103 673,086 39,821 6.29 8,346 -24.26 0.0035
2017-11-13 2017-09-30 13F AMPCO-PITTSBURGH COM 032037103 633,265 36,417 6.10 11,020 25.18 0.0048
2017-08-11 2017-06-30 13F AMPCO-PITTSBURGH COM 032037103 596,848 23,955 4.18 8,803 9.37 0.0041
2017-05-12 2017-03-31 13F AMPCO-PITTSBURGH COM 032037103 572,893 27,996 5.14 8,049 -11.81 0.0038
2017-02-09 2016-12-31 13F AMPCO-PITTSBURGH COM 032037103 544,897 3,523 0.65 9,127 52.02 0.0046
2016-11-10 2016-09-30 13F AMPCO-PITTSBURGH COM 032037103 541,374 23,231 4.48 6,004 2.46 0.0032
2016-08-09 2016-06-30 13F AMPCO-PITTSBURGH COM 032037103 518,143 40,416 8.46 5,860 -11.81 0.0034
2016-05-13 2016-03-31 13F AMPCO-PITTSBURGH COM 032037103 477,727 10,120 2.16 6,645 38.50 0.0040
2016-02-10 2015-12-31 13F AMPCO-PITTSBURGH COM 032037103 467,607 -3,465 -0.74 4,798 -6.64 0.0030
2015-11-13 2015-09-30 13F AMPCO-PITTSBURGH COM 032037103 471,072 -6,456 -1.35 5,139 -28.82 0.0034
2015-08-14 2015-06-30 13F AMPCO-PITTSBURGH COM 032037103 477,528 6,111 1.30 7,220 -12.28 0.0044
2015-05-14 2015-03-31 13F AMPCO-PITTSBURGH COM 032037103 471,417 13,602 2.97 8,231 -6.60 0.0052
2015-02-06 2014-12-31 13F AMPCO-PITTSBURGH COM 032037103 457,815 12,332 2.77 8,813 -1.09 0.0058
2014-11-13 2014-09-30 13F AMPCO-PITTSBURGH COM 032037103 445,483 7,851 1.79 8,910 -11.25 0.0063
2014-08-08 2014-06-30 13F AMPCO-PITTSBURGH COM 032037103 437,632 6,996 1.62 10,039 23.54 0.0070
2014-05-14 2014-03-31 13F AMPCO-PITTSBURGH COM 032037103 430,636 4,815 1.13 8,126 -1.88 0.0061
2014-02-12 2013-12-31 13F AMPCO-PITTSBURGH COM 032037103 425,821 5,612 1.34 8,282 9.99 0.0065
2013-11-13 2013-09-30 13F AMPCO-PITTSBURGH COM 032037103 420,209 1,719 0.41 7,530 -4.14 0.0065
2013-08-15 2013-06-30 13F AMPCO-PITTSBURGH COM 032037103 418,490 418,490 7,855 0.0074
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.