# Yorktown Management & Research Co Inc

> Institutional holdings reported to the SEC as of Q2 2026 on Form 13F. CIK 1313559. Source: https://holderbook.com/funds/1313559-yorktown-management-research-co-inc/

- Reported value: $163.3M
- Positions: 249
- Weight of the ten largest: 16.2%
- Filed: 2026-07-23

A 13F reports long US equity positions only. Short positions, bonds, foreign listings, private holdings and cash are not visible, so this is not the manager's whole book.

## Holdings

| Security | Ticker | Value | Shares | Weight | Quarters held |
|---|---|---|---|---|---|
| COMFORT SYS USA INC | [FIX](https://holderbook.com/stocks/FIX/) | $5.9M | 2,960 | 3.6% | 11 |
| IES HOLDINGS INC | [IESC](https://holderbook.com/stocks/IESC/) | $4.0M | 5,510 | 2.5% | 12 |
| KLA CORP | [KLAC](https://holderbook.com/stocks/KLAC/) | $2.7M | 8,900 | 1.6% | 28 |
| ISHARES TR | [ICVT](https://holderbook.com/stocks/ICVT/) | $2.4M | 20,000 | 1.5% | 4 |
| SPDR SERIES TRUST | [CWB](https://holderbook.com/stocks/CWB/) | $2.2M | 20,000 | 1.3% | 4 |
| VANGUARD WHITEHALL FDS | [VWOB](https://holderbook.com/stocks/VWOB/) | $2.0M | 30,000 | 1.2% | 4 |
| GUARDANT HEALTH INC | [GH](https://holderbook.com/stocks/GH/) | $1.9M | 12,500 | 1.1% | 5 |
| STONEX GROUP INC | [SNEX](https://holderbook.com/stocks/SNEX/) | $1.9M | 15,750 | 1.1% | 17 |
| FABRINET | [FN](https://holderbook.com/stocks/FN/) | $1.8M | 3,150 | 1.1% | 11 |
| NOVA LTD | [NVMI](https://holderbook.com/stocks/NVMI/) | $1.7M | 3,220 | 1.1% | 10 |
| ACM RESH INC | [ACMR](https://holderbook.com/stocks/ACMR/) | $1.7M | 13,300 | 1.0% | 5 |
| ARISTA NETWORKS INC | [ANET](https://holderbook.com/stocks/ANET/) | $1.7M | 9,800 | 1.0% | 7 |
| ISHARES TR | [LQD](https://holderbook.com/stocks/LQD/) | $1.6M | 15,000 | 1.0% | 3 |
| WESCO INTL INC | [WCC](https://holderbook.com/stocks/WCC/) | $1.6M | 4,550 | 1.0% | 15 |
| FTAI AVIATION LTD | [FTAI](https://holderbook.com/stocks/FTAI/) | $1.6M | 5,800 | 1.0% | 9 |
| CECO ENVIRONMENTAL CORP | [CECO](https://holderbook.com/stocks/CECO/) | $1.6M | 17,209 | 1.0% | 4 |
| MUELLER INDS INC | [MLI](https://holderbook.com/stocks/MLI/) | $1.5M | 12,400 | 0.9% | 31 |
| RBC BEARINGS INC | [RBC](https://holderbook.com/stocks/RBC/) | $1.3M | 1,970 | 0.8% | 11 |
| BLOOM ENERGY CORP | [BE](https://holderbook.com/stocks/BE/) | $1.3M | 4,150 | 0.8% | 1 |
| AXSOME THERAPEUTICS INC | [AXSM](https://holderbook.com/stocks/AXSM/) | $1.2M | 4,850 | 0.7% | 3 |
| DYCOM INDS INC | [DY](https://holderbook.com/stocks/DY/) | $1.2M | 2,326 | 0.7% | 5 |
| WOODWARD INC | [WWD](https://holderbook.com/stocks/WWD/) | $1.2M | 2,750 | 0.7% | 8 |
| CAMTEK LTD | [CAMT](https://holderbook.com/stocks/CAMT/) | $1.1M | 7,050 | 0.7% | 12 |
| APPLIED DIGITAL CORP | [APLD](https://holderbook.com/stocks/APLD/) | $1.1M | 30,350 | 0.7% | 4 |
| SEMTECH CORP | [SMTC](https://holderbook.com/stocks/SMTC/) | $1.1M | 6,850 | 0.7% | 1 |
| MODINE MFG CO | [MOD](https://holderbook.com/stocks/MOD/) | $1.1M | 4,150 | 0.7% | 9 |
| INTERACTIVE BROKERS GROUP IN | [IBKR](https://holderbook.com/stocks/IBKR/) | $1.1M | 12,400 | 0.7% | 7 |
| FIRSTCASH HOLDINGS INC | [FCFS](https://holderbook.com/stocks/FCFS/) | $1.1M | 4,950 | 0.7% | 7 |
| XOMETRY INC | [XMTR](https://holderbook.com/stocks/XMTR/) | $1.1M | 11,050 | 0.7% | 4 |
| CURTISS WRIGHT CORP | [CW](https://holderbook.com/stocks/CW/) | $1.1M | 1,400 | 0.6% | 8 |
| AXON ENTERPRISE INC | [AXON](https://holderbook.com/stocks/AXON/) | $1.1M | 1,875 | 0.6% | 9 |
| SPX TECHNOLOGIES INC | [SPXC](https://holderbook.com/stocks/SPXC/) | $1.0M | 4,250 | 0.6% | 8 |
| DATADOG INC | [DDOG](https://holderbook.com/stocks/DDOG/) | $1.0M | 4,000 | 0.6% | 8 |
| DIGI INTL INC | [DGII](https://holderbook.com/stocks/DGII/) | $1.0M | 13,700 | 0.6% | 9 |
| LIQUIDIA CORPORATION | [LQDA](https://holderbook.com/stocks/LQDA/) | $1.0M | 12,700 | 0.6% | 1 |
| IONQ INC | [IONQ](https://holderbook.com/stocks/IONQ/) | $996.0K | 18,700 | 0.6% | 2 |
| INSTALLED BLDG PRODS INC | [IBP](https://holderbook.com/stocks/IBP/) | $988.3K | 4,300 | 0.6% | 10 |
| RAYMOND JAMES FINL INC | [RJF](https://holderbook.com/stocks/RJF/) | $980.6K | 6,450 | 0.6% | 25 |
| ISHARES TR | [PFF](https://holderbook.com/stocks/PFF/) | $975.7K | 32,000 | 0.6% | 4 |
| LUMENTUM HLDGS INC | [LITE](https://holderbook.com/stocks/LITE/) | $965.3K | 1,125 | 0.6% | 2 |
| FORGENT POWER SOLUTIONS INC | [FPS](https://holderbook.com/stocks/FPS/) | $960.8K | 17,200 | 0.6% | 1 |
| CASEYS GEN STORES INC | [CASY](https://holderbook.com/stocks/CASY/) | $953.7K | 1,200 | 0.6% | 12 |
| MEDPACE HLDGS INC | [MEDP](https://holderbook.com/stocks/MEDP/) | $953.3K | 1,800 | 0.6% | 16 |
| PENUMBRA INC | [PEN](https://holderbook.com/stocks/PEN/) | $947.2K | 3,000 | 0.6% | 16 |
| HA SUSTAINABLE INFRA CAP INC | [HASI](https://holderbook.com/stocks/HASI/) | $919.6K | 23,550 | 0.6% | 4 |
| MASTEC INC | [MTZ](https://holderbook.com/stocks/MTZ/) | $915.3K | 2,200 | 0.6% | 4 |
| BWX TECHNOLOGIES INC | [BWXT](https://holderbook.com/stocks/BWXT/) | $914.9K | 4,700 | 0.6% | 8 |
| MONOLITHIC PWR SYS INC | [MPWR](https://holderbook.com/stocks/MPWR/) | $898.5K | 650 | 0.6% | 27 |
| LIFESTANCE HEALTH GROUP INC | [LFST](https://holderbook.com/stocks/LFST/) | $895.4K | 83,600 | 0.5% | 1 |
| CELESTICA INC | [CLS](https://holderbook.com/stocks/CLS/) | $893.8K | 2,450 | 0.5% | 4 |
| PERFORMANCE FOOD GROUP CO | [PFGC](https://holderbook.com/stocks/PFGC/) | $880.9K | 7,880 | 0.5% | 15 |
| INSMED INC | [INSM](https://holderbook.com/stocks/INSM/) | $845.0K | 7,925 | 0.5% | 9 |
| DENALI THERAPEUTICS INC | [DNLI](https://holderbook.com/stocks/DNLI/) | $825.6K | 32,100 | 0.5% | 1 |
| HAWKINS INC | [HWKN](https://holderbook.com/stocks/HWKN/) | $817.1K | 5,750 | 0.5% | 7 |
| CIENA CORP | [CIEN](https://holderbook.com/stocks/CIEN/) | $809.4K | 1,650 | 0.5% | 3 |
| LPL FINL HLDGS INC | [LPLA](https://holderbook.com/stocks/LPLA/) | $802.8K | 2,850 | 0.5% | 24 |
| RUSH STREET INTERACTIVE INC | [RSI](https://holderbook.com/stocks/RSI/) | $800.0K | 26,900 | 0.5% | 4 |
| ISHARES TR | [HYG](https://holderbook.com/stocks/HYG/) | $799.7K | 10,000 | 0.5% | 4 |
| ALLEGRO MICROSYSTEMS INC | [ALGM](https://holderbook.com/stocks/ALGM/) | $786.7K | 11,300 | 0.5% | 8 |
| ESCO TECHNOLOGIES INC | [ESE](https://holderbook.com/stocks/ESE/) | $778.8K | 2,225 | 0.5% | 3 |
| SAIA INC | [SAIA](https://holderbook.com/stocks/SAIA/) | $774.9K | 1,840 | 0.5% | 28 |
| BEAM THERAPEUTICS INC | [BEAM](https://holderbook.com/stocks/BEAM/) | $773.9K | 22,550 | 0.5% | 1 |
| DIGITALOCEAN HLDGS INC | [DOCN](https://holderbook.com/stocks/DOCN/) | $769.4K | 4,900 | 0.5% | 2 |
| GOLD FIELDS LTD | [GFI](https://holderbook.com/stocks/GFI/) | $764.2K | 22,750 | 0.5% | 14 |
| FORTINET INC | [FTNT](https://holderbook.com/stocks/FTNT/) | $760.4K | 4,950 | 0.5% | 28 |
| TG THERAPEUTICS INC | [TGTX](https://holderbook.com/stocks/TGTX/) | $752.7K | 13,700 | 0.5% | 5 |
| KRYSTAL BIOTECH INC | [KRYS](https://holderbook.com/stocks/KRYS/) | $743.3K | 2,000 | 0.5% | 4 |
| ENSIGN GROUP INC | [ENSG](https://holderbook.com/stocks/ENSG/) | $737.4K | 4,600 | 0.5% | 10 |
| TD SYNNEX CORPORATION | [SNX](https://holderbook.com/stocks/SNX/) | $721.8K | 2,700 | 0.4% | 25 |
| CREDO TECHNOLOGY GROUP HOLDI | [CRDO](https://holderbook.com/stocks/CRDO/) | $720.7K | 2,650 | 0.4% | 2 |
| PALO ALTO NETWORKS INC | [PANW](https://holderbook.com/stocks/PANW/) | $712.7K | 2,090 | 0.4% | 2 |
| SEZZLE INC | [SEZL](https://holderbook.com/stocks/SEZL/) | $677.9K | 3,950 | 0.4% | 5 |
| CHEFS WHSE INC | [CHEF](https://holderbook.com/stocks/CHEF/) | $677.5K | 7,050 | 0.4% | 9 |
| PDF SOLUTIONS INC | [PDFS](https://holderbook.com/stocks/PDFS/) | $676.0K | 9,550 | 0.4% | 2 |
| GRAHAM CORP | [GHM](https://holderbook.com/stocks/GHM/) | $674.7K | 5,450 | 0.4% | 2 |
| LIFE TIME GROUP HOLDINGS INC | [LTH](https://holderbook.com/stocks/LTH/) | $671.8K | 16,450 | 0.4% | 1 |
| PACS GROUP INC | [PACS](https://holderbook.com/stocks/PACS/) | $665.2K | 15,600 | 0.4% | 1 |
| KKR & CO INC | [KKR](https://holderbook.com/stocks/KKR/) | $660.8K | 7,200 | 0.4% | 26 |
| CYTOKINETICS INC | [CYTK](https://holderbook.com/stocks/CYTK/) | $660.2K | 7,750 | 0.4% | 2 |
| RAMBUS INC DEL | [RMBS](https://holderbook.com/stocks/RMBS/) | $657.1K | 4,950 | 0.4% | 25 |
| MIRUM PHARMACEUTICALS INC | [MIRM](https://holderbook.com/stocks/MIRM/) | $655.6K | 5,600 | 0.4% | 2 |
| ITT INC | [ITT](https://holderbook.com/stocks/ITT/) | $652.6K | 3,300 | 0.4% | 8 |
| DAVE INC | [DAVE](https://holderbook.com/stocks/DAVE/) | $652.0K | 1,750 | 0.4% | 3 |
| UNITED STS LIME & MINERALS I | [USLM](https://holderbook.com/stocks/USLM/) | $651.6K | 6,225 | 0.4% | 9 |
| UNITY SOFTWARE INC | [U](https://holderbook.com/stocks/U/) | $644.5K | 22,550 | 0.4% | 1 |
| ACADIA PHARMACEUTICALS INC | [ACAD](https://holderbook.com/stocks/ACAD/) | $643.9K | 25,450 | 0.4% | 5 |
| FRANKLIN ELEC INC | [FELE](https://holderbook.com/stocks/FELE/) | $643.1K | 6,000 | 0.4% | 27 |
| CORE & MAIN INC | [CNM](https://holderbook.com/stocks/CNM/) | $641.7K | 13,300 | 0.4% | 13 |
| API GROUP CORP | [APG](https://holderbook.com/stocks/APG/) | $641.6K | 15,150 | 0.4% | 8 |
| NEUROCRINE BIOSCIENCES INC | [NBIX](https://holderbook.com/stocks/NBIX/) | $632.0K | 3,750 | 0.4% | 4 |
| TEXAS PACIFIC LAND CORPORATI | [TPL](https://holderbook.com/stocks/TPL/) | $630.2K | 1,440 | 0.4% | 10 |
| STOCK YDS BANCORP INC | [SYBT](https://holderbook.com/stocks/SYBT/) | $619.4K | 8,100 | 0.4% | 8 |
| HALOZYME THERAPEUTICS INC | [HALO](https://holderbook.com/stocks/HALO/) | $614.4K | 7,850 | 0.4% | 2 |
| SUNBELT RENTALS HOLDINGS INC | [SUNB](https://holderbook.com/stocks/SUNB/) | $613.4K | 8,200 | 0.4% | 2 |
| LITHIA MTRS INC | [LAD](https://holderbook.com/stocks/LAD/) | $610.0K | 2,100 | 0.4% | 28 |
| TELEDYNE TECHNOLOGIES INC | [TDY](https://holderbook.com/stocks/TDY/) | $600.2K | 900 | 0.4% | 26 |
| WESTERN ALLIANCE BANCORP | [WAL](https://holderbook.com/stocks/WAL/) | $591.8K | 7,200 | 0.4% | 5 |
| EAGLE MATLS INC | [EXP](https://holderbook.com/stocks/EXP/) | $591.8K | 2,630 | 0.4% | 12 |
| PAMPA ENERGIA S A | [PAM](https://holderbook.com/stocks/PAM/) | $591.3K | 7,200 | 0.4% | 12 |
| EMBRAER S.A. | [EMBJ](https://holderbook.com/stocks/EMBJ/) | $587.0K | 9,200 | 0.4% | 5 |

## What the disclosed book did

Not the fund's return. This is the change in value of the positions disclosed on Form 13F, had they been left untouched, against SPY over the same quarter ends.

| Quarter | Book | Market | Difference | Priced |
|---|---|---|---|---|
| Q2 2026 | +20.7% | +14.8% | +5.8% | 99% |
| Q1 2026 | -2.7% | -4.6% | +2.0% | 99% |
| Q4 2025 | -1.8% | +2.4% | -4.1% | 100% |
| Q3 2025 | +6.5% | +7.8% | -1.3% | 100% |
| Q2 2025 | +12.6% | +10.5% | +2.2% | 100% |
| Q1 2025 | -8.1% | -4.6% | -3.5% | 100% |
| Q4 2024 | -0.4% | +2.1% | -2.6% | 100% |
| Q3 2024 | +3.7% | +5.4% | -1.8% | 99% |

## Quarter by quarter

| Quarter | 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 |