There is a long list of 62 institutional holders of PTSI within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of PTSI by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-PTSI table below, the initial column indicates the name of each top institutional holder of PTSI, with a link to that fund's top holdings. The next columns indicate the amount of PTSI stock held by each of the institutional holders of PTSI, followed by the PTSI position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
Dimensional Fund Advisors LP	1,351,428	$28,084	12/31/2023
PTSI	1,351,428	$28,084	12/31/2023
Renaissance Technologies LLC	1,026,808	$21,337	12/31/2023
PTSI	1,026,808	$21,337	12/31/2023
BlackRock Inc.	503,496	$10,463	12/31/2023
PTSI	503,496	$10,463	12/31/2023
Vanguard Group Inc.	339,309	$7,051	12/31/2023
PTSI	339,309	$7,051	12/31/2023
Bridgeway Capital Management Inc.	141,194	$2,934	12/31/2023
PTSI	141,194	$2,934	12/31/2023
Geode Capital Management LLC	134,309	$2,791	12/31/2023
PTSI	134,309	$2,791	12/31/2023
Pacific Ridge Capital Partners LLC	127,168	$2,643	12/31/2023
PTSI	127,168	$2,643	12/31/2023
Hotchkis & Wiley Capital Management LLC	124,034	$2,577	12/31/2023
PTSI	124,034	$2,577	12/31/2023
State Street Corp	122,954	$2,555	12/31/2023
PTSI	122,954	$2,555	12/31/2023
Horrell Capital Management Inc.	116,896	$2,429	12/31/2023
PTSI	116,896	$2,429	12/31/2023
Bank of America Corp DE	114,903	$2,388	12/31/2023
PTSI	114,903	$2,388	12/31/2023
Northern Trust Corp	74,893	$1,556	12/31/2023
PTSI	74,893	$1,556	12/31/2023
American Century Companies Inc.	68,171	$1,417	12/31/2023
PTSI	68,171	$1,417	12/31/2023
Bank of New York Mellon Corp	55,362	$1,150	12/31/2023
PTSI	55,362	$1,150	12/31/2023
Empowered Funds LLC	46,974	$976	12/31/2023
PTSI	46,974	$976	12/31/2023
Ameriprise Financial Inc.	46,592	$968	12/31/2023
PTSI	46,592	$968	12/31/2023
Pinnacle Holdings LLC	43,645	$907	12/31/2023
PTSI	43,645	$907	12/31/2023
NJ State Employees Deferred Compensation Plan	40,000	$831	12/31/2023
PTSI	40,000	$831	12/31/2023
Acadian Asset Management LLC	36,886	$764	12/31/2023
PTSI	36,886	$764	12/31/2023
Jacobs Levy Equity Management Inc.	27,140	$564	12/31/2023
PTSI	27,140	$564	12/31/2023
Janus Henderson Group PLC	27,081	$563	12/31/2023
PTSI	27,081	$563	12/31/2023
Los Angeles Capital Management & Equity Research Inc.	27,870	$452	03/31/2024
PTSI	27,870	$452	03/31/2024
Denali Advisors LLC	23,100	$374	03/31/2024
PTSI	23,100	$374	03/31/2024
Goldman Sachs Group Inc.	17,093	$355	12/31/2023
PTSI	17,093	$355	12/31/2023
Morgan Stanley	16,966	$353	12/31/2023
PTSI	16,966	$353	12/31/2023
Charles Schwab Investment Management Inc.	16,942	$352	12/31/2023
PTSI	16,942	$352	12/31/2023
Nuveen Asset Management LLC	14,375	$299	12/31/2023
PTSI	14,375	$299	12/31/2023
Invesco Ltd.	13,250	$275	12/31/2023
PTSI	13,250	$275	12/31/2023
Swiss National Bank	13,015	$270	12/31/2023
PTSI	13,015	$270	12/31/2023
GSA Capital Partners LLP	12,326	$256	12/31/2023
PTSI	12,326	$256	12/31/2023
Rhumbline Advisers	11,472	$238	12/31/2023
PTSI	11,472	$238	12/31/2023
Martingale Asset Management L P	11,317	$235	12/31/2023
PTSI	11,317	$235	12/31/2023
JPMorgan Chase & Co.	10,879	$226	12/31/2023
PTSI	10,879	$226	12/31/2023
O Shaughnessy Asset Management LLC	10,408	$216	12/31/2023
PTSI	10,408	$216	12/31/2023
Linden Thomas Advisory Services LLC	10,029	$208	12/31/2023
PTSI	10,029	$208	12/31/2023
Barclays PLC	9,755	$203	12/31/2023
PTSI	9,755	$203	12/31/2023
Millennium Management LLC	9,781	$203	12/31/2023
PTSI	9,781	$203	12/31/2023
Legal & General Group Plc	8,688	$181	12/31/2023
PTSI	8,688	$181	12/31/2023
UBS Group AG	8,124	$169	12/31/2023
PTSI	8,124	$169	12/31/2023
State of Tennessee Treasury Department	7,241	$150	12/31/2023
PTSI	7,241	$150	12/31/2023
California State Teachers Retirement System	6,853	$142	12/31/2023
PTSI	6,853	$142	12/31/2023
Royal Bank of Canada	6,753	$140	12/31/2023
PTSI	6,753	$140	12/31/2023
Russell Investments Group Ltd.	4,439	$92	12/31/2023
PTSI	4,439	$92	12/31/2023
Strs Ohio	4,000	$83	12/31/2023
PTSI	4,000	$83	12/31/2023
MetLife Investment Management LLC	3,579	$74	12/31/2023
PTSI	3,579	$74	12/31/2023
Deutsche Bank AG	3,302	$69	12/31/2023
PTSI	3,302	$69	12/31/2023
American International Group Inc.	3,074	$64	12/31/2023
PTSI	3,074	$64	12/31/2023
BNP Paribas Arbitrage SA	2,149	$45	12/31/2023
PTSI	2,149	$45	12/31/2023
Wells Fargo & Company MN	1,862	$39	12/31/2023
PTSI	1,862	$39	12/31/2023
Quent Capital LLC	1,532	$32	12/31/2023
PTSI	1,532	$32	12/31/2023