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Yorktown Management & Research Co Inc — 13F Holdings & Portfolio

CIK 1313559 · latest 13F-HR filed 2026-07-23

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Yorktown Management & Research Co Inc manages $163.3M in 13F-reported U.S. long-equity assets across 249 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are FIX (3.59%), IESC (2.48%), KLAC (1.64%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 82 new positions, exited 47, added to 112, and trimmed 28.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

Filer Information
Address
106 ANNJO COURT SUITE A
FOREST, VA 24551
Phone
(800) 544-6060
Filing Manager
Yorktown Management & Research Co Inc
Forest, VA
Signatory
David D. Basten
President
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AUM

$163.3M

Long-equity book

Holdings

249

Distinct positions

Period

2026-06-30

Filed 2026-07-23

Q/Q Activity

+82 / −47 / ↑112 / ↓28

vs 2026-03-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • Comfort Systems USA, Inc.$1.4M +32.5%
  • KLA Corporation$1.4M +104.9%
  • ACM Research, Inc.$1.2M +222.5%
  • Guardant Health, Inc.$1.1M +129.4%
  • IES Holdings, Inc.$1.0M +34.0%
Show all 112 →

Top Trims

  • Palo Alto Networks, Inc.-$715.9K -50.1%
  • Primoris Services Corporation-$473.3K -53.8%
  • Insmed, Inc.-$450.9K -34.8%
  • Gold Fields Ltd.-$268.7K -26.0%
  • Fabrinet-$211.2K -10.7%
Show all 28 →

New Positions

  • Bloom Energy Corporation$1.3M
  • Semtech Corporation$1.1M
  • Liquidia Corporation$1.0M
  • Forgent Power Solutions, Inc.$960.8K
  • LifeStance Health Group, Inc.$895.4K
Show all 82 →

Exited Positions

  • Par Pacific Holdings, Inc.$620.1K
  • Zeta Global Holdings Corporation$610.5K
  • TransMedics Group, Inc.$576.6K
  • Dutch Bros, Inc.$521.8K
  • Calix, Inc.$440.9K
Show all 47 →
All Holdings

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 Comfort Systems USA, Inc. FIX 199908104 $5.9M 3.59% 2,960 SH
2 IES Holdings, Inc. IESC 44951W106 $4.0M 2.48% 5,510 SH
3 KLA Corporation KLAC 482480100 $2.7M 1.64% 8,900 SH
4 iShares Convertible Bond ETF ICVT 46435G102 $2.4M 1.49% 20,000 SH
5 SPDR Bloomberg Convertible Securities ETF CWB 78464A359 $2.2M 1.32% 20,000 SH
6 Vanguard Emerging Markets Government Bond ETF VWOB 921946885 $2.0M 1.24% 30,000 SH
7 Guardant Health, Inc. GH 40131M109 $1.9M 1.15% 12,500 SH
8 StoneX Group, Inc. SNEX 861896108 $1.9M 1.14% 15,750 SH
9 Fabrinet FN G3323L100 $1.8M 1.08% 3,150 SH
10 Nova Ltd. NVMI M7516K103 $1.7M 1.07% 3,220 SH
11 ACM Research, Inc. ACMR 00108J109 $1.7M 1.03% 13,300 SH
12 Arista Networks, Inc. ANET 040413205 $1.7M 1.02% 9,800 SH
13 iShares iBoxx $ Investment Grade Corporate Bond LQD 464287242 $1.6M 1.00% 15,000 SH
14 WESCO International, Inc. WCC 95082P105 $1.6M 0.96% 4,550 SH
15 FTAI Aviation Ltd. FTAI G3730V105 $1.6M 0.96% 5,800 SH
16 CECO Environmental Corporation CECO 125141101 $1.6M 0.96% 17,209 SH
17 Mueller Industries, Inc. MLI 624756102 $1.5M 0.93% 12,400 SH
18 RBC Bearings, Inc. RBC 75524B104 $1.3M 0.78% 1,970 SH
19 Bloom Energy Corporation BE 093712107 $1.3M 0.77% 4,150 SH
20 Axsome Therapeutics, Inc. AXSM 05464T104 $1.2M 0.73% 4,850 SH
21 Dycom Industries, Inc. DY 267475101 $1.2M 0.72% 2,326 SH
22 Woodward, Inc. WWD 980745103 $1.2M 0.72% 2,750 SH
23 Camtek Ltd. CAMT M20791105 $1.1M 0.70% 7,050 SH
24 Applied Digital Corporation APLD 038169207 $1.1M 0.69% 30,350 SH
25 Semtech Corporation SMTC 816850101 $1.1M 0.68% 6,850 SH
26 Modine Manufacturing Company MOD 607828100 $1.1M 0.68% 4,150 SH
27 Interactive Brokers Group, Inc. IBKR 45841N107 $1.1M 0.66% 12,400 SH
28 FirstCash Holdings, Inc. FCFS 33768G107 $1.1M 0.66% 4,950 SH
29 Xometry, Inc. XMTR 98423F109 $1.1M 0.65% 11,050 SH
30 Curtiss-Wright Corporation CW 231561101 $1.1M 0.65% 1,400 SH
31 Axon Enterprise, Inc. AXON 05464C101 $1.1M 0.64% 1,875 SH
32 SPX Technologies, Inc. SPXC 78473E103 $1.0M 0.64% 4,250 SH
33 Datadog, Inc. DDOG 23804L103 $1.0M 0.64% 4,000 SH
34 Digi International, Inc. DGII 253798102 $1.0M 0.63% 13,700 SH
35 Liquidia Corporation LQDA 53635D202 $1.0M 0.62% 12,700 SH
36 IonQ, Inc. IONQ 46222L108 $996.0K 0.61% 18,700 SH
37 Installed Building Products, Inc. IBP 45780R101 $988.3K 0.61% 4,300 SH
38 Raymond James Financial, Inc. RJF 754730109 $980.6K 0.60% 6,450 SH
39 iShares Preferred and Income Securities ETF PFF 464288687 $975.7K 0.60% 32,000 SH
40 Lumentum Holdings, Inc. LITE 55024U109 $965.3K 0.59% 1,125 SH
41 Forgent Power Solutions, Inc. FPS 34631F102 $960.8K 0.59% 17,200 SH
42 Casey's General Stores, Inc. CASY 147528103 $953.7K 0.58% 1,200 SH
43 Medpace Holdings, Inc. MEDP 58506Q109 $953.3K 0.58% 1,800 SH
44 Penumbra, Inc. PEN 70975L107 $947.2K 0.58% 3,000 SH
45 HA Sustainable Infrastructure Capital, Inc. HASI 41068X100 $919.6K 0.56% 23,550 SH
46 MasTec, Inc. MTZ 576323109 $915.3K 0.56% 2,200 SH
47 BWX Technologies, Inc. BWXT 05605H100 $914.9K 0.56% 4,700 SH
48 Monolithic Power Systems, Inc. MPWR 609839105 $898.5K 0.55% 650 SH
49 LifeStance Health Group, Inc. LFST 53228F101 $895.4K 0.55% 83,600 SH
50 Celestica, Inc. CLS 15101Q207 $893.8K 0.55% 2,450 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-07-23 $163.3M 249 0001193125-26-313433
2026-03-31 2026-04-20 $119.5M 214 0001193125-26-162911
2025-12-31 2026-01-23 $125.1M 219 0001193125-26-020430