Dimensional Fund Advisors Lp ownership in PTSI / P.A.M. Transportation Services, Inc.

P.A.M. Transportation Services, Inc.

US ˙ NasdaqGM ˙ US6931491061

DETTE SYMBOL ER IKKE LÆNGERE AKTIVT

Security	PTSI / P.A.M. Transportation Services, Inc.
Institution	Dimensional Fund Advisors Lp
Latest Disclosed Ownership	1,351,428 shares
Ownership	6.10%

2024-02-09 - Dimensional Fund Advisors Lp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 1,351,428 shares of P.A.M. Transportation Services, Inc. (US:PTSI). This represents 6.1 percent ownership of the company. In their previous filing dated 2023-02-10 , Dimensional Fund Advisors Lp had reported owning 1,405,974 shares, indicating a decrease of -3.88 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)
2024-02-09	2024-02-09	13G/A	1,405,974	1,351,428	-3.88	6.10	-3.17
2023-02-10	2023-02-10	13G/A	729,958	1,405,974	92.61	6.30	-3.08
2022-02-08	2022-02-08	13G/A	377,352	729,958	93.44	6.50	-1.52
2021-02-16	2021-02-16	13G/A	377,352	377,352	0.00	6.60	0.00
2021-02-16	2021-02-16	13G/A	384,418	377,352	-1.84	6.60	-1.20
2020-02-12	2020-02-12	13G/A	389,326	384,418	-1.26	6.68	2.45
2019-02-08	2019-02-08	13G/A	370,180	389,326	5.17	6.52	11.07
2018-02-09	2018-02-09	13G/A	336,937	370,180	9.87	5.87	11.60
2017-02-09	2017-02-09	13G/A	536,970	336,937	-37.25	5.26	-30.33
2016-02-09	2016-02-09	13G/A		536,970		7.55
2015-02-05	2015-02-05	13G/A		663,864		8.31
2014-02-10	2014-02-10	13G/A		629,283		7.27
2013-02-11	2013-02-11	13G/A		634,682		7.29
2012-02-14	2012-02-14	13G/A		633,531		7.10

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.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-07	2026-03-31	13F	PAMT	COM	693149106	1,338,021	-9,478	-0.70	11,306	-30.54	0.0005
2026-02-12	2025-12-31	13F	PAMT	COM	693149106	1,347,499	-2,991	-0.22	16,279	5.73	0.0034
2025-11-12	2025-09-30	13F	PAMT	COM	693149106	1,350,490	-7,255	-0.53	15,396	-11.89	0.0033
2025-08-12	2025-06-30	13F	PAMT	COM	693149106	1,357,745	-7,553	-0.55	17,474	5.42	0.0040
2025-05-13	2025-03-31	13F	PAMT	COM	693149106	1,365,298	-2,487	-0.18	16,575	-26.02	0.0041
2025-02-13	2024-12-31	13F	PAMT	COM	693149106	1,367,785	10,131	0.75	22,405	-10.80	0.0054
2024-11-07	2024-09-30	13F	P A M TRANSN SVCS	COM	693149106	1,357,654	14,543	1.08	25,116	7.66	0.0061
2024-08-09	2024-06-30	13F	P A M TRANSN SVCS	COM	693149106	1,343,111	-13,803	-1.02	23,328	6.06	0.0061
2024-05-10	2024-03-31	13F	P A M TRANSN SVCS	COM	693149106	1,356,914	5,486	0.41	21,996	-21.68	0.0060
2024-02-07	2023-12-31	13F	P A M TRANSN SVCS	COM	693149106	1,351,428	-4,494	-0.33	28,084	-3.89	0.0082
2023-11-09	2023-09-30	13F	P A M TRANSN SVCS	COM	693149106	1,355,922	-8,830	-0.65	29,220	-20.02	0.0096
2023-08-09	2023-06-30	13F	P A M TRANSN SVCS	COM	693149106	1,364,752	-22,003	-1.59	36,535	-7.98	0.0116
2023-05-12	2023-03-31	13F	P A M TRANSN SVCS	COM	693149106	1,386,755	-19,219	-1.37	39,704	110,186.11	0.0134
2023-02-09	2022-12-31	13F	P A M TRANSN SVCS	COM	693149106	1,405,974	-6,110	-0.43	36	-99.92	0.0108
2022-11-10	2022-09-30	13F	P A M TRANSN SVCS	COM	693149106	1,412,084	-23,143	-1.61	43,718	11.21	0.0168
2022-08-12	2022-06-30	13F	P A M TRANSN SVCS	COM	693149106	1,435,227	-11,529	-0.80	39,311	-21.81	0.0141
2022-05-13	2022-03-31	13F	P A M TRANSN SVCS	COM	693149106	1,446,756	716,798	98.20	50,276	-3.01	0.0155
2022-02-09	2021-12-31	13F	P A M TRANSN SVCS	COM	693149106	729,958	-12,994	-1.75	51,834	55.11	0.0157
2021-11-12	2021-09-30	13F	P A M TRANSN SVCS	COM	693149106	742,952	372,506	100.56	33,418	71.01	0.0108
2021-08-12	2021-06-30	13F	P A M TRANSN SVCS	COM	693149106	370,446	-2,959	-0.79	19,541	-15.18	0.0062
2021-05-14	2021-03-31	13F	P A M TRANSN SVCS	COM	693149106	373,405	-3,947	-1.05	23,039	24.60	0.0076
2021-03-08	2020-12-31	13F/A-2	P A M TRANSN SVCS	COM	693149106	377,352	-2,585	-0.68	18,490	29.43	0.0067
2021-02-11	2020-12-31	13F	P A M TRANSN SVCS	COM	693149106	377,352	-2,585		18,490		6,677.6052
2020-11-12	2020-09-30	13F	P A M TRANSN SVCS	COM	693149106	379,937	-3,613	-0.94	14,286	21.13	0.0061
2020-08-13	2020-06-30	13F	P A M TRANSN SVCS	COM	693149106	383,550	-1,267	-0.33	11,794	-0.33	0.0052
2020-05-14	2020-03-31	13F	P A M TRANSN SVCS	COM	693149106	384,817	399	0.10	11,833	-46.66	0.0062
2020-02-14	2019-12-31	13F	P A M TRANSN SVCS	COM	693149106	384,418	-7,776	-1.98	22,184	-4.31	0.0081
2019-11-12	2019-09-30	13F	P A M TRANSN SVCS	COM	693149106	392,194	-3,358	-0.85	23,182	-5.47	0.0090
2019-08-13	2019-06-30	13F	P A M TRANSN SVCS	COM	693149106	395,552	340	0.09	24,523	26.79	0.0095
2019-08-12	2019-03-31	13F/A-2	P A M TRANSN SVCS	COM	693149106	395,212	5,886	1.51	19,341	26.06	0.0077
2019-05-10	2019-03-31	13F	P A M TRANSN SVCS	COM	693149106	395,212	5,886		19,341
2019-02-26	2018-12-31	13F/A-1	P A M TRANSN SVCS	COM	693149106	389,326	11,495	3.04	15,343	-37.61	0.0070
2019-02-13	2018-12-31	13F	P A M TRANSN SVCS	COM	693149106	389,326	11,495		15,343
2018-11-13	2018-09-30	13F	P A M TRANSN SVCS	COM	693149106	377,831	9,535	2.59	24,593	42.16	0.0094
2018-08-10	2018-06-30	13F	P A M TRANSN SVCS	COM	693149106	368,296	-1,483	-0.40	17,299	28.70	0.0069
2018-05-11	2018-03-31	13F	P A M TRANSN SVCS	COM	693149106	369,779	-401	-0.11	13,441	4.40	0.0056
2018-02-12	2017-12-31	13F	P A M TRANSN SVCS	COM	693149106	370,180	1,481	0.40	12,875	45.93	0.0053
2017-11-13	2017-09-30	13F	P A M TRANSN SVCS	COM	693149106	368,699	7,927	2.20	8,823	29.05	0.0039
2017-08-11	2017-06-30	13F	P A M TRANSN SVCS	COM	693149106	360,772	15,014	4.34	6,837	21.37	0.0032
2017-05-12	2017-03-31	13F	P A M TRANSN SVCS	COM	693149106	345,758	8,821	2.62	5,633	-35.65	0.0027
2017-02-09	2016-12-31	13F	P A M TRANSN SVCS	COM	693149106	336,937	4,895	1.47	8,754	31.70	0.0044
2016-11-10	2016-09-30	13F	P A M TRANSN SVCS	COM	693149106	332,042	-49	-0.01	6,647	25.96	0.0036
2016-08-09	2016-06-30	13F	P A M TRANSN SVCS	COM	693149106	332,091	-206,678	-38.36	5,277	-68.20	0.0030
2016-05-13	2016-03-31	13F	P A M TRANSN SVCS	COM	693149106	538,769	1,799	0.34	16,594	12.01	0.0099
2016-02-10	2015-12-31	13F	P A M TRANSN SVCS	COM	693149106	536,970	2,002	0.37	14,815	-16.21	0.0092
2015-11-13	2015-09-30	13F	P A M TRANSN SVCS	COM	693149106	534,968	-131,466	-19.73	17,681	-54.30	0.0116
2015-08-14	2015-06-30	13F	P A M TRANSN SVCS	COM	693149106	666,434	-2,478	-0.37	38,686	0.98	0.0237
2015-05-14	2015-03-31	13F	P A M TRANSN SVCS	COM	693149106	668,912	5,048	0.76	38,309	11.31	0.0242
2015-02-06	2014-12-31	13F	P A M TRANSN SVCS	COM	693149106	663,864	12,568	1.93	34,415	45.77	0.0226
2014-11-13	2014-09-30	13F	P A M TRANSN SVCS	COM	693149106	651,296	14,163	2.22	23,609	32.53	0.0167
2014-08-08	2014-06-30	13F	P A M TRANSN SVCS	COM	693149106	637,133	988	0.16	17,814	40.86	0.0124
2014-05-14	2014-03-31	13F	P A M TRANSN SVCS	COM	693149106	636,145	6,862	1.09	12,647	-3.01	0.0094
2014-02-12	2013-12-31	13F	P A M TRANSN SVCS	COM	693149106	629,283	360	0.06	13,039	18.54	0.0102
2013-11-13	2013-09-30	13F	P A M TRANSN SVCS	COM	693149106	628,923	-5,759	-0.91	11,000	70.41	0.0095
2013-08-15	2013-06-30	13F	P A M TRANSN SVCS	COM	693149106	634,682	634,682		6,455		0.0061

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.