Yorktown Management & Research Co Inc

13F filer · CIK 0001313559

Reported Jul 23, 2026

Net buyer this quarter

13F portfolio value$163MU.S. long equity reported on 13F

Positions24281 new · 46 closed

Net flow last quarter+$19.9MBuys minus sells

Top 10 positions weight15.2%Concentration

Holdings

13F · last 4 quarters free

Scroll for earlier quarters

Company	Value	% of portfolio	% of company	POSITION CHANGE qoq %	First reported
Q2 2026Reported Jul 23, 2026242 positions
FIXComfort Systems USA Inc	$5.87M	3.59%	0.01%	-7.8%	Q4 2023
IESCIES Holdings, Inc.	$4.05M	2.48%	0.03%	-13.1%	Q4 2023
KLACKla Corp	$2.69M	1.64%	0.00%	Not reported	Q2 2018
GHGuardant Health, Inc.	$1.88M	1.15%	0.01%	+41.2%	Q2 2025
SNEXStoneX Group Inc.	$1.87M	1.14%	0.01%	Not reported	Q2 2022
FNFabrinet	$1.77M	1.08%	0.01%	-17.1%	Q3 2017
NVMINova Ltd.	$1.75M	1.07%	0.01%	-14.8%	Q1 2024
ACMRACM Research, Inc.	$1.69M	1.03%	0.03%	Not reported	Q2 2025
ANETArista Networks, Inc.	$1.66M	1.02%	0.00%	Not reported	Q3 2022
WCCWesco International Inc	$1.57M	0.96%	0.01%	Not reported	Q4 2022
FTAIFTAI Aviation Ltd.	$1.57M	0.96%	0.01%	Not reported	Q2 2024
CECOCeco Environmental Corp	$1.56M	0.96%	0.03%	+33.4%	Q3 2025
MLIMueller Industries Inc	$1.52M	0.93%	0.01%	-14.2%	Q2 2013
RBCRBC Bearings INC	$1.27M	0.78%	0.01%	Not reported	Q2 2019
BEBloom Energy Corp	$1.26M	0.77%	0.00%	New	Q2 2026
AXSMAxsome Therapeutics, Inc.	$1.19M	0.73%	0.01%	+34.7%	Q4 2025
DYDycom Industries Inc	$1.18M	0.72%	0.01%	+57.6%	Q2 2025
WWDWoodward, Inc.	$1.17M	0.72%	0.00%	Not reported	Q1 2014
CAMTCamtek Ltd	$1.15M	0.70%	0.02%	Not reported	Q4 2023
APLDApplied Digital Corp.	$1.13M	0.69%	0.01%	Not reported	Q3 2025
SMTCSemtech Corp	$1.11M	0.68%	0.01%	New	Q2 2026
MODModine Manufacturing Co	$1.11M	0.68%	0.01%	Not reported	Q2 2024
IBKRInteractive Brokers Group, Inc.	$1.08M	0.66%	0.00%	Not reported	Q4 2013
FCFSFirstCash Holdings, Inc.	$1.07M	0.66%	0.01%	Not reported	Q4 2024
XMTRXometry, Inc.	$1.07M	0.65%	0.02%	Not reported	Q3 2025
CWCurtiss Wright Corp	$1.06M	0.65%	0.00%	Not reported	Q3 2024
AXONAxon Enterprise, Inc.	$1.05M	0.64%	0.00%	-29.3%	Q2 2024
SPXCSPX Technologies, Inc.	$1.04M	0.64%	0.01%	+57.4%	Q3 2024
DDOGDatadog, Inc.	$1.04M	0.64%	0.01%	Not reported	Q3 2024
DGIIDigi International Inc	$1.03M	0.63%	0.04%	Not reported	Q2 2024
LQDALiquidia Corp	$1.01M	0.62%	0.01%	New	Q2 2026
IONQIonQ, Inc.	$996K	0.61%	0.00%	+167.1%	Q1 2026
IBPInstalled Building Products, Inc.	$988K	0.61%	0.02%	+48.3%	Q1 2024
RJFRaymond James Financial Inc	$981K	0.60%	0.00%	Not reported	Q4 2014
LITELumentum Holdings Inc.	$965K	0.59%	0.00%	Not reported	Q1 2026
FPSForgent Power Solutions, Inc.	$961K	0.59%	Not reported	New	Q2 2026
CASYCaseys General Stores Inc	$954K	0.58%	0.00%	Not reported	Q4 2023
MEDPMedpace Holdings, Inc.	$953K	0.58%	0.01%	Not reported	Q3 2022
PENPenumbra Inc	$947K	0.58%	0.01%	Not reported	Q1 2020
HASIHA Sustainable Infrastructure Capital, Inc.	$920K	0.56%	0.02%	Not reported	Q4 2017
MTZMastec Inc	$915K	0.56%	0.00%	Not reported	Q3 2025
BWXTBWX Technologies, Inc.	$915K	0.56%	0.01%	Not reported	Q3 2024
MPWRMonolithic Power Systems, Inc.	$899K	0.55%	0.00%	Not reported	Q4 2019
LFSTLifeStance Health Group, Inc.	$895K	0.55%	0.02%	New	Q2 2026
CLSCelestica Inc	$894K	0.55%	0.00%	Not reported	Q1 2017
PFGCPerformance Food Group Co	$881K	0.54%	0.01%	Not reported	Q3 2021
INSMINSMED Inc	$845K	0.52%	0.00%	Not reported	Q2 2024
DNLIDenali Therapeutics Inc.	$826K	0.51%	0.02%	New	Q2 2026
HWKNHawkins Inc	$817K	0.50%	0.03%	Not reported	Q4 2024
CIENCiena Corp	$809K	0.50%	0.00%	Not reported	Q2 2020

Q1 2026Reported Apr 20, 2026207 positions
FIXComfort Systems USA Inc	$4.43M	3.70%	0.01%	-8.3%	Q4 2023
IESCIES Holdings, Inc.	$3.02M	2.53%	0.03%	Not reported	Q4 2023
FNFabrinet	$1.98M	1.66%	0.01%	Not reported	Q3 2017
NVMINova Ltd.	$1.64M	1.37%	0.01%	+18.1%	Q1 2024
MLIMueller Industries Inc	$1.6M	1.34%	0.01%	Not reported	Q2 2013
PANWPalo Alto Networks Inc	$1.43M	1.20%	0.00%	Not reported	Q4 2013
FTAIFTAI Aviation Ltd.	$1.42M	1.19%	0.01%	Not reported	Q2 2024
KLACKla Corp	$1.31M	1.10%	0.00%	Not reported	Q2 2018
INSMINSMED Inc	$1.3M	1.08%	0.00%	-17.5%	Q2 2024
SNEXStoneX Group Inc.	$1.27M	1.06%	0.02%	Not reported	Q2 2022
WCCWesco International Inc	$1.24M	1.04%	0.01%	Not reported	Q4 2022
ANETArista Networks, Inc.	$1.2M	1.01%	0.00%	Not reported	Q3 2022
AXONAxon Enterprise, Inc.	$1.13M	0.94%	0.00%	Not reported	Q2 2024
RBCRBC Bearings INC	$1.07M	0.90%	0.01%	Not reported	Q2 2019
CAMTCamtek Ltd	$1.07M	0.89%	0.02%	+35.6%	Q4 2023
GFIGold Fields Ltd	$1.03M	0.86%	0.00%	Not reported	Q1 2023
PENPenumbra Inc	$985K	0.82%	0.01%	Not reported	Q1 2020
WWDWoodward, Inc.	$984K	0.82%	0.00%	Not reported	Q1 2014
BWXTBWX Technologies, Inc.	$961K	0.80%	0.01%	Not reported	Q3 2024
CWCurtiss Wright Corp	$954K	0.80%	0.00%	Not reported	Q3 2024
RJFRaymond James Financial Inc	$934K	0.78%	0.00%	Not reported	Q4 2014
FCFSFirstCash Holdings, Inc.	$931K	0.78%	0.01%	Not reported	Q4 2024
MODModine Manufacturing Co	$899K	0.75%	0.01%	Not reported	Q2 2024
HWKNHawkins Inc	$883K	0.74%	0.03%	+11.7%	Q4 2024
PRIMPrimoris Services Corp	$880K	0.74%	0.01%	Not reported	Q4 2024
CASYCaseys General Stores Inc	$873K	0.73%	0.00%	Not reported	Q4 2023
HASIHA Sustainable Infrastructure Capital, Inc.	$865K	0.72%	0.02%	Not reported	Q4 2017
MEDPMedpace Holdings, Inc.	$864K	0.72%	0.01%	Not reported	Q3 2022
IBKRInteractive Brokers Group, Inc.	$832K	0.70%	0.00%	Not reported	Q4 2013
GHGuardant Health, Inc.	$817K	0.68%	0.01%	+59.5%	Q2 2025
USLMUnited States Lime & Minerals Inc	$813K	0.68%	0.02%	Not reported	Q2 2024
LITELumentum Holdings Inc.	$791K	0.66%	0.00%	New	Q1 2026
IBPInstalled Building Products, Inc.	$769K	0.64%	0.01%	Not reported	Q1 2024
CECOCeco Environmental Corp	$769K	0.64%	0.04%	+33.0%	Q3 2025
APLDApplied Digital Corp.	$721K	0.60%	0.01%	Not reported	Q3 2025
MPWRMonolithic Power Systems, Inc.	$711K	0.59%	0.00%	Not reported	Q4 2019
MTZMastec Inc	$708K	0.59%	0.00%	Not reported	Q3 2025
ENSGEnsign Group, Inc	$705K	0.59%	0.01%	Not reported	Q1 2024
CLSCelestica Inc	$690K	0.58%	0.00%	Not reported	Q1 2017
TPLTexas Pacific Land Corp	$683K	0.57%	0.00%	Not reported	Q3 2022
PFGCPerformance Food Group Co	$675K	0.56%	0.01%	Not reported	Q3 2021
KKRKKR & Co. Inc.	$666K	0.56%	0.00%	Not reported	Q3 2017
DGIIDigi International Inc	$660K	0.55%	0.04%	Not reported	Q2 2024
CNMCore & Main, Inc.	$657K	0.55%	Not reported	Not reported	Q2 2023
SAIASaia Inc	$646K	0.54%	0.01%	Not reported	Q3 2019
CIENCiena Corp	$641K	0.54%	0.00%	Not reported	Q2 2020
PAMPampa Energy Inc.	$637K	0.53%	0.00%	Not reported	Q1 2021
LPLALPL Financial Holdings Inc.	$632K	0.53%	0.00%	-60.3%	Q3 2017
ITTItt Inc.	$629K	0.53%	0.00%	Not reported	Q3 2024
ESEEsco Technologies Inc	$626K	0.52%	0.01%	+97.8%	Q4 2019

Q4 2025Reported Jan 23, 2026212 positions
FIXComfort Systems USA Inc	$3.27M	2.61%	0.01%	Not reported	Q4 2023
IESCIES Holdings, Inc.	$2.47M	1.97%	0.03%	Not reported	Q4 2023
LPLALPL Financial Holdings Inc.	$1.89M	1.51%	0.01%	Not reported	Q3 2017
FNFabrinet	$1.73M	1.38%	0.01%	Not reported	Q3 2017
INSMINSMED Inc	$1.67M	1.34%	0.00%	Not reported	Q2 2024
MLIMueller Industries Inc	$1.66M	1.33%	0.01%	Not reported	Q2 2013
AXONAxon Enterprise, Inc.	$1.51M	1.20%	0.00%	Not reported	Q2 2024
HOODRobinhood Markets, Inc.	$1.39M	1.11%	0.01%	Not reported	Q3 2021
ANETArista Networks, Inc.	$1.28M	1.03%	0.00%	Not reported	Q3 2022
FTAIFTAI Aviation Ltd.	$1.14M	0.91%	0.01%	Not reported	Q2 2024
WCCWesco International Inc	$1.11M	0.89%	0.01%	Not reported	Q4 2022
KLACKla Corp	$1.08M	0.86%	0.00%	Not reported	Q2 2018
NVMINova Ltd.	$1.05M	0.84%	0.01%	+77.8%	Q1 2024
RJFRaymond James Financial Inc	$1.04M	0.83%	0.00%	Not reported	Q4 2014
MEDPMedpace Holdings, Inc.	$1.01M	0.81%	0.01%	Not reported	Q3 2022
SRADSportradar Group AG	$1M	0.80%	Not reported	Not reported	Q2 2024
SNEXStoneX Group Inc.	$999K	0.80%	0.02%	Not reported	Q2 2022
GFIGold Fields Ltd	$993K	0.79%	0.00%	Not reported	Q1 2023
ARXAccelerant Holdings	$970K	0.78%	0.04%	New	Q4 2025
PENPenumbra Inc	$933K	0.75%	0.01%	Not reported	Q1 2020
KKRKKR & Co. Inc.	$918K	0.73%	0.00%	Not reported	Q3 2017
RBCRBC Bearings INC	$883K	0.71%	0.01%	Not reported	Q2 2019
DLOdLocal Ltd	$858K	0.69%	0.02%	+46.3%	Q4 2022
WWDWoodward, Inc.	$831K	0.66%	0.00%	Not reported	Q1 2014
BWXTBWX Technologies, Inc.	$812K	0.65%	0.01%	Not reported	Q3 2024
IBKRInteractive Brokers Group, Inc.	$797K	0.64%	0.00%	Not reported	Q4 2013
FCFSFirstCash Holdings, Inc.	$789K	0.63%	0.01%	Not reported	Q4 2024
ZETAZeta Global Holdings Corp.	$780K	0.62%	Not reported	New	Q4 2025
CWCurtiss Wright Corp	$772K	0.62%	0.00%	Not reported	Q3 2024
IRIngersoll Rand Inc.	$768K	0.61%	0.00%	Not reported	Q3 2013
EXLSExlService Holdings, Inc.	$768K	0.61%	0.01%	Not reported	Q3 2019
KNSLKinsale Capital Group, Inc.	$767K	0.61%	0.01%	+50.8%	Q2 2024
RSIRush Street Interactive, Inc.	$766K	0.61%	0.02%	+46.5%	Q3 2025
PRIMPrimoris Services Corp	$763K	0.61%	0.01%	+50.0%	Q4 2024
IBPInstalled Building Products, Inc.	$752K	0.60%	0.01%	Not reported	Q1 2024
TYLTyler Technologies Inc	$749K	0.60%	0.00%	Not reported	Q1 2018
USLMUnited States Lime & Minerals Inc	$745K	0.60%	0.02%	Not reported	Q2 2024
APLDApplied Digital Corp.	$744K	0.59%	0.01%	Not reported	Q3 2025
HASIHA Sustainable Infrastructure Capital, Inc.	$740K	0.59%	0.02%	+103.9%	Q4 2017
HWKNHawkins Inc	$732K	0.58%	0.02%	Not reported	Q4 2024
CLSCelestica Inc	$724K	0.58%	0.00%	Not reported	Q1 2017
PFGCPerformance Food Group Co	$709K	0.57%	0.01%	Not reported	Q3 2021
FIGRFigure Technology Solutions, Inc.	$707K	0.56%	Not reported	New	Q4 2025
LADLithia Motors Inc	$698K	0.56%	0.01%	Not reported	Q3 2019
CNMCore & Main, Inc.	$691K	0.55%	Not reported	Not reported	Q2 2023
GENIGenius Sports Ltd	$691K	0.55%	0.63%	Not reported	Q2 2022
HLIHoulihan Lokey, Inc.	$671K	0.54%	0.65%	Not reported	Q4 2022
CASYCaseys General Stores Inc	$663K	0.53%	0.00%	Not reported	Q4 2023
XMTRXometry, Inc.	$657K	0.53%	0.02%	Not reported	Q3 2025
RMBSRambus Inc	$643K	0.51%	0.01%	Not reported	Q2 2020

Q3 2025Reported Oct 29, 2025200 positions
FIXComfort Systems USA Inc	$2.89M	2.30%	0.01%	Not reported	Q4 2023
IESCIES Holdings, Inc.	$2.52M	2.01%	0.03%	Not reported	Q4 2023
AXONAxon Enterprise, Inc.	$1.9M	1.52%	0.00%	Not reported	Q2 2024
HOODRobinhood Markets, Inc.	$1.76M	1.40%	0.01%	-22.6%	Q3 2021
LPLALPL Financial Holdings Inc.	$1.76M	1.40%	0.01%	Not reported	Q3 2017
MLIMueller Industries Inc	$1.46M	1.16%	0.01%	Not reported	Q2 2013
ANETArista Networks, Inc.	$1.43M	1.14%	0.00%	Not reported	Q3 2022
FNFabrinet	$1.39M	1.10%	0.01%	Not reported	Q3 2017
INSMINSMED Inc	$1.38M	1.10%	0.00%	+64.1%	Q2 2024
SRADSportradar Group AG	$1.13M	0.90%	Not reported	Not reported	Q2 2024
RJFRaymond James Financial Inc	$1.11M	0.89%	0.00%	Not reported	Q4 2014
SNEXStoneX Group Inc.	$1.06M	0.84%	0.01%	Not reported	Q2 2022
DSGXDescartes Systems Group Inc	$1.02M	0.81%	0.01%	Not reported	Q1 2021
FTAIFTAI Aviation Ltd.	$968K	0.77%	0.01%	Not reported	Q2 2024
WCCWesco International Inc	$962K	0.77%	0.01%	Not reported	Q4 2022
KLACKla Corp	$960K	0.77%	0.00%	Not reported	Q2 2018
LIFLife360, Inc.	$957K	0.76%	0.01%	Not reported	Q4 2024
SMCISuper Micro Computer, Inc.	$956K	0.76%	0.00%	Not reported	Q4 2022
GFIGold Fields Ltd	$955K	0.76%	0.00%	Not reported	Q1 2023
HWKNHawkins Inc	$941K	0.75%	0.02%	Not reported	Q4 2024
KKRKKR & Co. Inc.	$936K	0.75%	0.00%	Not reported	Q3 2017
MEDPMedpace Holdings, Inc.	$925K	0.74%	0.01%	Not reported	Q3 2022
BWXTBWX Technologies, Inc.	$867K	0.69%	0.01%	Not reported	Q3 2024
TYLTyler Technologies Inc	$863K	0.69%	0.00%	Not reported	Q1 2018
DORMDorman Products, Inc.	$857K	0.68%	0.02%	Not reported	Q1 2018
IBKRInteractive Brokers Group, Inc.	$853K	0.68%	0.00%	Not reported	Q4 2013
SEMRSemrush Holdings, Inc.	$850K	0.68%	0.51%	+94.8%	Q2 2025
PFGCPerformance Food Group Co	$820K	0.65%	0.01%	Not reported	Q3 2021
USLMUnited States Lime & Minerals Inc	$819K	0.65%	0.02%	Not reported	Q2 2024
IRIngersoll Rand Inc.	$801K	0.64%	0.00%	Not reported	Q3 2013
EXLSExlService Holdings, Inc.	$797K	0.64%	0.01%	Not reported	Q3 2019
HLIHoulihan Lokey, Inc.	$790K	0.63%	0.65%	Not reported	Q4 2022
FCFSFirstCash Holdings, Inc.	$784K	0.63%	0.01%	+86.8%	Q4 2024
GENIGenius Sports Ltd	$776K	0.62%	0.34%	Not reported	Q2 2022
PAMPampa Energy Inc.	$775K	0.62%	0.00%	Not reported	Q1 2021
RBCRBC Bearings INC	$769K	0.61%	0.01%	Not reported	Q2 2019
CWCurtiss Wright Corp	$760K	0.61%	0.00%	Not reported	Q3 2024
PENPenumbra Inc	$760K	0.61%	0.01%	Not reported	Q1 2020
HLNEHamilton Lane INC	$755K	0.60%	Not reported	Not reported	Q3 2021
RMBSRambus Inc	$729K	0.58%	0.01%	Not reported	Q2 2020
CNMCore & Main, Inc.	$716K	0.57%	Not reported	Not reported	Q2 2023
IBPInstalled Building Products, Inc.	$715K	0.57%	0.01%	Not reported	Q1 2024
APLDApplied Digital Corp.	$696K	0.56%	0.01%	New	Q3 2025
WWDWoodward, Inc.	$695K	0.55%	0.00%	Not reported	Q1 2014
CASYCaseys General Stores Inc	$678K	0.54%	0.00%	Not reported	Q4 2023
LADLithia Motors Inc	$664K	0.53%	0.01%	Not reported	Q3 2019
FRHCFreedom Holding Corp.	$637K	0.51%	0.01%	Not reported	Q2 2024
METCRamaco Resources, Inc.	$636K	0.51%	0.04%	New	Q3 2025
AVAVAeroVironment Inc	$628K	0.50%	0.00%	Not reported	Q1 2022
QLYSQualys, Inc.	$622K	0.50%	0.01%	Not reported	Q3 2020

Premium opens every quarter this fund has filed