Q2 2026 13F · SEC CIK 1313559

Yorktown Management & Research Co Inc

Mutual fund managerFiled 2026-07-23 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $163.3M
Reported positions: 249
Top holdings a year, 3 yrs: +14.2%
Assets under management: $677.1M

Yorktown Management & Research Co Inc is a mutual fund manager that reported 249 positions worth $163.3M in its Q2 2026 13F, filed 2026-07-23. Its largest holdings were Comfort Sys USA Inc (FIX, 3.6%), Ies Holdings Inc (IESC, 2.5%), Kla Corp (KLAC, 1.6%). A portfolio copying its top holdings returned 14.2% a year over the last 3 years, against 20.4% for the S&P 500.

Yorktown Management & Research Co Inc holdings largest 50 of 249 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

Yorktown Management & Research Co Inc 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
FIXComfort Sys USA Inc	3.6%	3.7%	2,960	-7.8%	$5.9M
IESCIes Holdings Inc	2.5%	2.5%	5,510	-13.1%	$4.0M
KLACKla Corp	1.6%	1.1%	8,900	+900.0%	$2.7M
ICVTIshares Tr	1.5%	2.0%	20,000	-13.0%	$2.4M
CWBSpdr Series Trust	1.3%	1.8%	20,000	-13.0%	$2.2M
VWOBVanguard Whitehall Fds	1.2%	1.6%	30,000	+0.0%	$2.0M
GHGuardant Health Inc	1.1%	0.7%	12,500	+41.2%	$1.9M
SNEXStonex Group Inc.	1.1%	1.1%	15,750	+0.0%	$1.9M
FNFabrinet	1.1%	1.7%	3,150	-17.1%	$1.8M
NVMINova Ltd	1.1%	1.4%	3,220	-14.8%	$1.7M
ACMRAcm Research Inc	1.0%	—	13,300	—	$1.7M
ANETArista Networks Inc	1.0%	1.0%	9,800	+0.0%	$1.7M
LQDIshares Tr	1.0%	1.3%	15,000	+7.1%	$1.6M
WCCWESCO International Inc	1.0%	1.0%	4,550	+0.0%	$1.6M
FTAIFtai Aviation Ltd	1.0%	1.2%	5,800	+0.0%	$1.6M
CECOCeco Environmental Corp	1.0%	0.6%	17,209	+33.4%	$1.6M
MLIMueller Inds Inc	0.9%	1.3%	12,400	-14.2%	$1.5M
ROLLRbc Bearings Inc	0.8%	0.9%	1,970	+0.0%	$1.3M
BEBloom Energy Corp	0.8%	—	4,150	—	$1.3M
AXSMAxsome Therapeutics Inc.	0.7%	—	4,850	—	$1.2M
DYDycom Industries Inc	0.7%	—	2,326	—	$1.2M
WWDWoodward Inc	0.7%	0.8%	2,750	+0.0%	$1.2M
CAMTCamtek Ltd	0.7%	0.9%	7,050	+0.0%	$1.1M
APLDApplied Digital Corp	0.7%	0.6%	30,350	+0.0%	$1.1M
SMTCSemtech Corp	0.7%	—	6,850	—	$1.1M
MODModine Mfg Co	0.7%	0.8%	4,150	+0.0%	$1.1M
IBKRInteractive Brokers Group in	0.7%	0.7%	12,400	+0.0%	$1.1M
FCFSFirstcash Holdings Inc	0.7%	0.8%	4,950	+0.0%	$1.1M
XMTRXometry Inc	0.7%	—	11,050	—	$1.1M
CWCurtiss Wright Corp	0.7%	0.8%	1,400	+0.0%	$1.1M
AXONAxon Enterprise Inc	0.6%	0.9%	1,875	-29.2%	$1.1M
SPXCSpx Technologies Inc	0.6%	—	4,250	—	$1.0M
DDOGDatadog Inc	0.6%	—	4,000	—	$1.0M
DGIIDigi International Inc.	0.6%	0.6%	13,700	+0.0%	$1.0M
LQDALiquidia Corporation	0.6%	—	12,700	—	$1.0M
IONQIonq Inc	0.6%	—	18,700	—	$996K
IBPInstalled Bldg Prods Inc	0.6%	0.6%	4,300	+48.3%	$988K
RJFRaymond James Finl Inc	0.6%	0.8%	6,450	+0.0%	$981K
PFFIshares Tr	0.6%	0.8%	32,000	+0.0%	$976K
LITELumentum Hldgs Inc Com	0.6%	0.7%	1,125	+0.0%	$965K
FPSForgent Power Solutions Inc	0.6%	—	17,200	—	$961K
CASYCaseys Gen Stores Inc	0.6%	0.7%	1,200	+0.0%	$954K
MEDPMedpace Hldgs Inc	0.6%	0.7%	1,800	+0.0%	$953K
PENPenumbra Inc	0.6%	0.8%	3,000	+0.0%	$947K
HASIHa Sustainable Infra Cap Inc	0.6%	0.7%	23,550	+0.0%	$920K
MTZMastec Inc	0.6%	0.6%	2,200	+0.0%	$915K
BWXTBwx Technologies Inc	0.6%	0.8%	4,700	+0.0%	$915K
MPWRMonolithic Power Systms Inc	0.6%	0.6%	650	+0.0%	$899K
LFSTLifestance Health Group Inc	0.5%	—	83,600	—	$895K
CLSCelestica Inc	0.5%	0.6%	2,450	+0.0%	$894K

What Yorktown Management & Research Co Inc bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +24.4% /yr; S&P 500 +20.1%
3 years: +14.2% /yr; S&P 500 +20.4%
5 years: +5.3% /yr; S&P 500 +11.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value and rebuilt each quarter on the day the filing became public. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$163.3M	249
Q1 2026	$119.5M	214
Q4 2025	$125.1M	219
Q3 2025	$125.4M	206
Q2 2025	$104.8M	208
Q1 2025	$92.0M	206
Q4 2024	$104.0M	204
Q3 2024	$97.6M	194
Q2 2024	$93.1M	189
Q1 2024	$105.1M	217
Q4 2023	$95.8M	200
Q3 2023	$88.9M	211

Questions about Yorktown Management & Research Co Inc's portfolio

What stocks does Yorktown Management & Research Co Inc own?

Yorktown Management & Research Co Inc's latest 13F, for Q2 2026 and filed Jul 23, 2026, lists 249 positions worth $163.3M. The largest are Comfort Sys USA Inc (FIX) at 3.6%, Ies Holdings Inc (IESC) at 2.5%, Kla Corp (KLAC) at 1.6%, Ishares Tr (ICVT) at 1.5% and Spdr Series Trust (CWB) at 1.3%.

What did Yorktown Management & Research Co Inc buy last quarter?

In Q2 2026, Yorktown Management & Research Co Inc added Kla Corp (KLAC) (+900.0% shares), Installed Bldg Prods Inc (IBP) (+48.3% shares) and Guardant Health Inc (GH) (+41.2% shares), compared with its Q1 2026 filing.

What did Yorktown Management & Research Co Inc sell last quarter?

In Q2 2026, Yorktown Management & Research Co Inc cut from its top 50 Palo Alto Networks Inc (PANW), cut from its top 50 Insmed Inc (INSM), cut from its top 50 Gold Fields Ltd ADR (GFI), cut from its top 50 Hawkins Inc (HWKN), cut from its top 50 Primoris Svcs Corp (PRIM), Axon Enterprise Inc (AXON) (-29.2% shares), Fabrinet (FN) (-17.1% shares) and Nova Ltd (NVMI) (-14.8% shares), compared with its Q1 2026 filing.

How has Yorktown Management & Research Co Inc's portfolio performed?

A portfolio copying Yorktown Management & Research Co Inc's 20 largest 13F holdings each quarter, from the day each filing was public, returned +14.2% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +24.4% against +20.1%. Over 5 years: +5.3% a year against +11.6%.

When is Yorktown Management & Research Co Inc's next 13F filing due?

13F filings are due 45 days after each quarter ends. Yorktown Management & Research Co Inc's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does Yorktown Management & Research Co Inc manage?

Yorktown Management & Research Co Inc reported $677.1M of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $163.3M.