Yorktown Management & Research Co Inc

Forest, VA · CIK 1313559 · 13F filing filed 2026-07-23

SEC-registered investment adviser since 1985 · corporation

Assets managed$677.1m
Staff9 · 7 in investment roles
Main clients (by assets)Mutual funds and ETFs 100%
Form ADV · 2026-03-24SEC adviser record

Kindmutual funds
Others nearbyForest, VA

$163.3m reported value +36.6% vs Q1 2026

249positions

16.2%in top 10

82 new 22 added 12 reduced 47 sold out vs Q1 2026

Holdings, Q2 2026

The small lines show how much was held over the last 4 quarters (adjusted for stock splits).

#	Security	Ticker	Shares	Value	% of portfolio	Change	Shares change
1	COMFORT SYS USA INC COM FIX	FIX	2,960	$5.9m3.59%	3.59%	Reduced -250	-250 -7.8%
2	IES HOLDINGS INC COM IESC	IESC	5,510	$4.0m2.48%	2.48%	Reduced -830	-830 -13.1%
3	KLA CORP COM NEW KLAC	KLAC	8,900	$2.7m1.64%	1.64%	Unchanged
4	ISHARES TR CONV BD ETF ICVT	ICVT	20,000	$2.4m1.49%	1.49%	Reduced -3.0k	-3,000 -13.0%
5	SPDR SER TR BBG CONV SEC ETF CWB	CWB	20,000	$2.2m1.32%	1.32%	Reduced -3.0k	-3,000 -13.0%
6	VANGUARD WHITEHALL FDS EM MK GOV BD ETF VWOB	VWOB	30,000	$2.0m1.24%	1.24%	Unchanged
7	GUARDANT HEALTH INC COM GH	GH	12,500	$1.9m1.15%	1.15%	Added +3.6k	+3,650 41.2%
8	STONEX GROUP INC COM SNEX	SNEX	15,750	$1.9m1.14%	1.14%	Unchanged
9	FABRINET SHS FN	FN	3,150	$1.8m1.08%	1.08%	Reduced -650	-650 -17.1%
10	NOVA LTD COM NVMI	NVMI	3,220	$1.7m1.07%	1.07%	Reduced -560	-560 -14.8%
11	ACM RESH INC COM CL A ACMR	ACMR	13,300	$1.7m1.03%	1.03%	Unchanged
12	ARISTA NETWORKS INC COM SHS ANET	ANET	9,800	$1.7m1.02%	1.02%	Unchanged
13	ISHARES TR IBOXX INV CP ETF LQD	LQD	15,000	$1.6m1.00%	1.00%	Added +1.0k	+1,000 7.1%
14	WESCO INTL INC COM WCC	WCC	4,550	$1.6m0.96%	0.96%	Unchanged
15	FTAI AVIATION LTD SHS FTAI	FTAI	5,800	$1.6m0.96%	0.96%	Unchanged
16	CECO ENVIRONMENTAL CORP COM CECO	CECO	17,209	$1.6m0.96%	0.96%	Added +4.3k	+4,309 33.4%
17	MUELLER INDS INC COM MLI	MLI	12,400	$1.5m0.93%	0.93%	Reduced -2.0k	-2,050 -14.2%
18	RBC BEARINGS INC COM RBC	RBC	1,970	$1.3m0.78%	0.78%	Unchanged
19	BLOOM ENERGY CORP COM CL A BE	BE	4,150	$1.3m0.77%	0.77%	New
20	AXSOME THERAPEUTICS INC COM AXSM	AXSM	4,850	$1.2m0.73%	0.73%	Added +1.2k	+1,250 34.7%
21	DYCOM INDS INC COM DY	DY	2,326	$1.2m0.72%	0.72%	Added +850	+850 57.6%
22	WOODWARD INC COM WWD	WWD	2,750	$1.2m0.72%	0.72%	Unchanged
23	CAMTEK LTD ORD CAMT	CAMT	7,050	$1.1m0.70%	0.70%	Unchanged
24	APPLIED DIGITAL CORP COM NEW APLD	APLD	30,350	$1.1m0.69%	0.69%	Unchanged
25	SEMTECH CORP COM SMTC	SMTC	6,850	$1.1m0.68%	0.68%	New
26	MODINE MFG CO COM MOD	MOD	4,150	$1.1m0.68%	0.68%	Unchanged
27	INTERACTIVE BROKERS GROUP IN COM CL A IBKR	IBKR	12,400	$1.1m0.66%	0.66%	Unchanged
28	FIRSTCASH HOLDINGS INC COM FCFS	FCFS	4,950	$1.1m0.66%	0.66%	Unchanged
29	XOMETRY INC CLASS A COM XMTR	XMTR	11,050	$1.1m0.65%	0.65%	Unchanged
30	CURTISS WRIGHT CORP COM CW	CW	1,400	$1.1m0.65%	0.65%	Unchanged
31	AXON ENTERPRISE INC COM AXON	AXON	1,875	$1.1m0.64%	0.64%	Reduced -775	-775 -29.2%
32	SPX TECHNOLOGIES INC COM SPXC	SPXC	4,250	$1.0m0.64%	0.64%	Added +1.6k	+1,550 57.4%
33	DATADOG INC CL A COM DDOG	DDOG	4,000	$1.0m0.64%	0.64%	Unchanged
34	DIGI INTL INC COM DGII	DGII	13,700	$1.0m0.63%	0.63%	Unchanged
35	LIQUIDIA CORPORATION COM NEW LQDA	LQDA	12,700	$1.0m0.62%	0.62%	New
36	IONQ INC COM IONQ	IONQ	18,700	$996.0k0.61%	0.61%	Added +11.7k	+11,700 167.1%
37	INSTALLED BLDG PRODS INC COM IBP	IBP	4,300	$988.3k0.61%	0.61%	Added +1.4k	+1,400 48.3%
38	RAYMOND JAMES FINL INC COM RJF	RJF	6,450	$980.6k0.60%	0.60%	Unchanged
39	ISHARES TR PFD AND INCM SEC PFF	PFF	32,000	$975.7k0.60%	0.60%	Unchanged
40	LUMENTUM HLDGS INC COM LITE	LITE	1,125	$965.3k0.59%	0.59%	Unchanged
41	FORGENT POWER SOLUTIONS INC COM SHS CL A FPS	FPS	17,200	$960.8k0.59%	0.59%	New
42	CASEYS GEN STORES INC COM CASY	CASY	1,200	$953.7k0.58%	0.58%	Unchanged
43	MEDPACE HLDGS INC COM MEDP	MEDP	1,800	$953.3k0.58%	0.58%	Unchanged
44	PENUMBRA INC COM PEN	PEN	3,000	$947.2k0.58%	0.58%	Unchanged
45	HA SUSTAINABLE INFRA CAP INC COM HASI	HASI	23,550	$919.6k0.56%	0.56%	Unchanged
46	MASTEC INC COM MTZ	MTZ	2,200	$915.3k0.56%	0.56%	Unchanged
47	BWX TECHNOLOGIES INC COM BWXT	BWXT	4,700	$914.9k0.56%	0.56%	Unchanged
48	MONOLITHIC PWR SYS INC COM MPWR	MPWR	650	$898.5k0.55%	0.55%	Unchanged
49	LIFESTANCE HEALTH GROUP INC COM LFST	LFST	83,600	$895.4k0.55%	0.55%	New
50	CELESTICA INC COM CLS	CLS	2,450	$893.8k0.55%	0.55%	Unchanged
51	PERFORMANCE FOOD GROUP CO COM PFGC	PFGC	7,880	$880.9k0.54%	0.54%	Unchanged
52	INSMED INC COM PAR $.01 INSM	INSM	7,925	$845.0k0.52%	0.52%	Unchanged
53	DENALI THERAPEUTICS INC COM DNLI	DNLI	32,100	$825.6k0.51%	0.51%	New
54	HAWKINS INC COM HWKN	HWKN	5,750	$817.1k0.50%	0.50%	Unchanged
55	CIENA CORP COM NEW CIEN	CIEN	1,650	$809.4k0.50%	0.50%	Unchanged
56	LPL FINL HLDGS INC COM LPLA	LPLA	2,850	$802.8k0.49%	0.49%	Added +750	+750 35.7%
57	RUSH STREET INTERACTIVE INC COM RSI	RSI	26,900	$800.0k0.49%	0.49%	Unchanged
58	ISHARES TR IBOXX HI YD ETF HYG	HYG	10,000	$799.7k0.49%	0.49%	Unchanged
59	ALLEGRO MICROSYSTEMS INC COM ALGM	ALGM	11,300	$786.7k0.48%	0.48%	Unchanged
60	ESCO TECHNOLOGIES INC COM ESE	ESE	2,225	$778.8k0.48%	0.48%	Unchanged
61	SAIA INC COM SAIA	SAIA	1,840	$774.9k0.47%	0.47%	Unchanged
62	BEAM THERAPEUTICS INC COM BEAM	BEAM	22,550	$773.9k0.47%	0.47%	New
63	DIGITALOCEAN HLDGS INC COM DOCN	DOCN	4,900	$769.4k0.47%	0.47%	Unchanged
64	GOLD FIELDS LTD SPONSORED ADR GFI	GFI	22,750	$764.2k0.47%	0.47%	Unchanged
65	FORTINET INC COM FTNT	FTNT	4,950	$760.4k0.47%	0.47%	Unchanged
66	TG THERAPEUTICS INC COM TGTX	TGTX	13,700	$752.7k0.46%	0.46%	Unchanged
67	KRYSTAL BIOTECH INC COM KRYS	KRYS	2,000	$743.3k0.46%	0.46%	Unchanged
68	ENSIGN GROUP INC COM ENSG	ENSG	4,600	$737.4k0.45%	0.45%	Added +1.1k	+1,100 31.4%
69	TD SYNNEX CORPORATION COM SNX	SNX	2,700	$721.8k0.44%	0.44%	Unchanged
70	CREDO TECHNOLOGY GROUP HOLDI ORDINARY SHARES CRDO	CRDO	2,650	$720.7k0.44%	0.44%	Unchanged
71	PALO ALTO NETWORKS INC COM PANW	PANW	2,090	$712.7k0.44%	0.44%	Reduced -6.8k	-6,821 -76.5%
72	SEZZLE INC COM SEZL	SEZL	3,950	$677.9k0.42%	0.42%	Unchanged
73	CHEFS WHSE INC COM CHEF	CHEF	7,050	$677.5k0.41%	0.41%	Unchanged
74	PDF SOLUTIONS INC COM PDFS	PDFS	9,550	$676.0k0.41%	0.41%	Unchanged
75	GRAHAM CORP COM GHM	GHM	5,450	$674.7k0.41%	0.41%	Unchanged
76	LIFE TIME GROUP HOLDINGS INC COMMON STOCK LTH	LTH	16,450	$671.8k0.41%	0.41%	New
77	PACS GROUP INC COM SHS PACS	PACS	15,600	$665.2k0.41%	0.41%	New
78	KKR & CO INC COM KKR	KKR	7,200	$660.8k0.40%	0.40%	Unchanged
79	CYTOKINETICS INC COM NEW CYTK	CYTK	7,750	$660.2k0.40%	0.40%	Added +3.0k	+3,000 63.2%
80	RAMBUS INC DEL COM RMBS	RMBS	4,950	$657.1k0.40%	0.40%	Reduced -2.0k	-2,050 -29.3%
81	MIRUM PHARMACEUTICALS INC COM MIRM	MIRM	5,600	$655.6k0.40%	0.40%	Added +3.0k	+3,050 119.6%
82	ITT INC COM ITT	ITT	3,300	$652.6k0.40%	0.40%	Unchanged
83	DAVE INC CLASS A COM NEW DAVE	DAVE	1,750	$652.0k0.40%	0.40%	Unchanged
84	UNITED STS LIME & MINERALS I COM USLM	USLM	6,225	$651.6k0.40%	0.40%	Unchanged
85	UNITY SOFTWARE INC COM U	U	22,550	$644.5k0.39%	0.39%	New
86	ACADIA PHARMACEUTICALS INC COM ACAD	ACAD	25,450	$643.9k0.39%	0.39%	Added +13.4k	+13,400 111.2%
87	FRANKLIN ELEC INC COM FELE	FELE	6,000	$643.1k0.39%	0.39%	Unchanged
88	CORE & MAIN INC CL A CNM	CNM	13,300	$641.7k0.39%	0.39%	Unchanged
89	API GROUP CORP COM STK APG	APG	15,150	$641.6k0.39%	0.39%	Unchanged
90	NEUROCRINE BIOSCIENCES INC COM NBIX	NBIX	3,750	$632.0k0.39%	0.39%	Added +1.5k	+1,500 66.7%
91	TEXAS PACIFIC LAND CORPORATI COM TPL	TPL	1,440	$630.2k0.39%	0.39%	Unchanged
92	STOCK YDS BANCORP INC COM SYBT	SYBT	8,100	$619.4k0.38%	0.38%	Unchanged
93	HALOZYME THERAPEUTICS INC COM HALO	HALO	7,850	$614.4k0.38%	0.38%	Added +3.4k	+3,400 76.4%
94	SUNBELT RENTALS HOLDINGS INC SHS SUNB	SUNB	8,200	$613.4k0.38%	0.38%	Unchanged
95	LITHIA MTRS INC COM LAD	LAD	2,100	$610.0k0.37%	0.37%	Unchanged
96	TELEDYNE TECHNOLOGIES INC COM TDY	TDY	900	$600.2k0.37%	0.37%	Unchanged
97	WESTERN ALLIANCE BANCORP COM WAL	WAL	7,200	$591.8k0.36%	0.36%	Added +3.5k	+3,500 94.6%
98	EAGLE MATLS INC COM EXP	EXP	2,630	$591.8k0.36%	0.36%	Unchanged
99	PAMPA ENERGIA S A SPONS ADR LVL I PAM	PAM	7,200	$591.3k0.36%	0.36%	Unchanged
100	EMBRAER S.A. SPONSORED ADS EMBJ	EMBJ	9,200	$587.0k0.36%	0.36%	Added +5.0k	+5,000 119.0%

Sold out since Q1 2026

Security	Ticker	Shares held before	Value then
PAR PAC HOLDINGS INC PARR	PARR	9,900	$620.1k9.9k shares
ZETA GLOBAL HOLDINGS CORP ZETA	ZETA	38,350	$610.5k38.4k shares
TRANSMEDICS GROUP INC TMDX	TMDX	5,800	$576.6k5.8k shares
DUTCH BROS INC BROS	BROS	10,300	$521.8k10.3k shares
CALIX INC CALX	CALX	9,000	$440.9k9.0k shares
QUALYS INC QLYS	QLYS	4,700	$412.9k4.7k shares
BLACKLINE INC BL	BL	11,000	$407.0k11.0k shares
HERC HLDGS INC HRI	HRI	4,000	$398.2k4.0k shares
CLEARWATER ANALYTICS HLDGS I		16,700	$395.0k16.7k shares
SEMRUSH HLDGS INC SEMR	SEMR	32,500	$388.1k32.5k shares
LIFE360 INC LIF	LIF	9,000	$367.4k9.0k shares
AEROVIRONMENT INC AVAV	AVAV	1,994	$365.0k2.0k shares
REDDIT INC RDDT	RDDT	2,650	$356.8k2.6k shares
VSE CORP VSEC	VSEC	1,800	$331.9k1.8k shares
HAMILTON LANE INC HLNE	HLNE	3,300	$328.0k3.3k shares
BITMINE IMMERSION TECNOLOGIE BMNR	BMNR	16,400	$324.4k16.4k shares
OKTA INC OKTA	OKTA	4,100	$322.7k4.1k shares
THERMON GROUP HLDGS INC		6,300	$317.5k6.3k shares
APPFOLIO INC APPF	APPF	1,950	$307.7k1.9k shares
PAYLOCITY HLDG CORP PCTY	PCTY	2,800	$302.5k2.8k shares
RAMACO RES INC METC	METC	19,150	$296.1k19.1k shares
ONESTREAM INC OS	OS	12,300	$295.2k12.3k shares
VEEVA SYS INC VEEV	VEEV	1,650	$289.8k1.6k shares
DYNATRACE INC DT	DT	7,450	$275.5k7.5k shares
PAYMENTUS HOLDINGS INC PAY	PAY	10,800	$274.3k10.8k shares