There is a long list of 102 institutional holders of PRTS 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 PRTS by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-PRTS table below, the initial column indicates the name of each top institutional holder of PRTS, with a link to that fund's top holdings. The next columns indicate the amount of PRTS stock held by each of the institutional holders of PRTS, followed by the PRTS 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
BlackRock Inc.	5,556,485	$17,558	12/31/2023
PRTS	5,556,485	$17,558	12/31/2023
Vanguard Group Inc.	4,375,335	$13,826	12/31/2023
PRTS	4,375,335	$13,826	12/31/2023
Oaktop Capital Management II L.P.	3,725,185	$11,772	12/31/2023
PRTS	3,725,185	$11,772	12/31/2023
Nuveen Asset Management LLC	2,258,353	$7,136	12/31/2023
PRTS	2,258,353	$7,136	12/31/2023
North Star Investment Management Corp.	2,067,942	$6,535	12/31/2023
PRTS	2,067,942	$6,535	12/31/2023
Dimensional Fund Advisors LP	1,697,875	$5,366	12/31/2023
PRTS	1,697,875	$5,366	12/31/2023
Acadian Asset Management LLC	1,256,439	$3,969	12/31/2023
PRTS	1,256,439	$3,969	12/31/2023
D. E. Shaw & Co. Inc.	1,223,571	$3,866	12/31/2023
PRTS	1,223,571	$3,866	12/31/2023
Geode Capital Management LLC	1,158,433	$3,661	12/31/2023
PRTS	1,158,433	$3,661	12/31/2023
AQR Capital Management LLC	1,061,133	$3,353	12/31/2023
PRTS	1,061,133	$3,353	12/31/2023
State Street Corp	995,647	$3,146	12/31/2023
PRTS	995,647	$3,146	12/31/2023
Renaissance Technologies LLC	876,600	$2,770	12/31/2023
PRTS	876,600	$2,770	12/31/2023
First Eagle Investment Management LLC	792,767	$2,505	12/31/2023
PRTS	792,767	$2,505	12/31/2023
Wasatch Advisors Inc.	1,472,946	$2,386	03/31/2024
PRTS	1,472,946	$2,386	03/31/2024
Charles Schwab Investment Management Inc.	735,835	$2,325	12/31/2023
PRTS	735,835	$2,325	12/31/2023
Northern Trust Corp	483,235	$1,527	12/31/2023
PRTS	483,235	$1,527	12/31/2023
American Century Companies Inc.	428,311	$1,353	12/31/2023
PRTS	428,311	$1,353	12/31/2023
Goldman Sachs Group Inc.	419,912	$1,327	12/31/2023
PRTS	419,912	$1,327	12/31/2023
Essex Investment Management Co. LLC	385,911	$1,219	12/31/2023
PRTS	385,911	$1,219	12/31/2023
Portolan Capital Management LLC	372,430	$1,177	12/31/2023
PRTS	372,430	$1,177	12/31/2023
Man Group plc	361,816	$1,143	12/31/2023
PRTS	361,816	$1,143	12/31/2023
Isthmus Partners LLC	334,453	$1,057	12/31/2023
PRTS	334,453	$1,057	12/31/2023
FMR LLC	315,711	$998	12/31/2023
PRTS	315,711	$998	12/31/2023
RBF Capital LLC	300,000	$948	12/31/2023
PRTS	300,000	$948	12/31/2023
Panagora Asset Management Inc.	290,889	$919	12/31/2023
PRTS	290,889	$919	12/31/2023
Morgan Stanley	215,441	$681	12/31/2023
PRTS	215,441	$681	12/31/2023
Cubist Systematic Strategies LLC	205,713	$650	12/31/2023
PRTS	205,713	$650	12/31/2023
GSA Capital Partners LLP	204,260	$645	12/31/2023
PRTS	204,260	$645	12/31/2023
Barclays PLC	199,987	$631	12/31/2023
PRTS	199,987	$631	12/31/2023
Citadel Advisors LLC		$579	12/31/2023
PRTS	165,953	$524	12/31/2023
Call	20,000	$63	12/31/2023
Put	2,400	$8	12/31/2023
Qube Research & Technologies Ltd	163,891	$518	12/31/2023
PRTS	163,891	$518	12/31/2023
Bank of America Corp DE	162,596	$514	12/31/2023
PRTS	162,596	$514	12/31/2023
Advisor Group Holdings Inc.	157,982	$499	12/31/2023
PRTS	157,982	$499	12/31/2023
State of Wisconsin Investment Board	153,000	$483	12/31/2023
PRTS	153,000	$483	12/31/2023
Assenagon Asset Management S.A.	247,056	$400	03/31/2024
PRTS	247,056	$400	03/31/2024
Two Sigma Investments LP	120,786	$382	12/31/2023
PRTS	120,786	$382	12/31/2023
Bridgeway Capital Management Inc.	120,344	$380	12/31/2023
PRTS	120,344	$380	12/31/2023
Hsbc Holdings PLC	106,380	$345	12/31/2023
PRTS	106,380	$345	12/31/2023
Sierra Summit Advisors LLC	108,754	$344	12/31/2023
PRTS	108,754	$344	12/31/2023
Voya Investment Management LLC	96,569	$305	12/31/2023
PRTS	96,569	$305	12/31/2023
Hilltop Holdings Inc.	88,000	$278	12/31/2023
PRTS	88,000	$278	12/31/2023
Strs Ohio	84,000	$265	12/31/2023
PRTS	84,000	$265	12/31/2023
Dynamic Technology Lab Private Ltd	81,605	$258	12/31/2023
PRTS	81,605	$258	12/31/2023
Intellectus Partners LLC	81,156	$256	12/31/2023
PRTS	81,156	$256	12/31/2023
Bank of New York Mellon Corp	149,051	$241	03/31/2024
PRTS	149,051	$241	03/31/2024
Invesco Ltd.	72,559	$229	12/31/2023
PRTS	72,559	$229	12/31/2023
Rhumbline Advisers	67,980	$215	12/31/2023
PRTS	67,980	$215	12/31/2023
State of Tennessee Treasury Department	66,985	$212	12/31/2023
PRTS	66,985	$212	12/31/2023
XTX Topco Ltd	65,269	$206	12/31/2023
PRTS	65,269	$206	12/31/2023
SG Americas Securities LLC	63,615	$201	12/31/2023
PRTS	63,615	$201	12/31/2023