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Stock research / United States / Funds / Yorktown Management & Research Co Inc

Yorktown Management & Research Co Inc

CIK 1313559 · latest 13F filed 28 October 2026 · Read the filing on EDGAR

Yorktown Management & Research Co Inc reported 252 US-listed holdings worth $149.7 million in its 13F for the quarter ended 30 September 2026, filed 28 October 2026. Its largest: Comfort Systems USA Inc. (3.3%), IES Holdings, Inc. (2.4%) and Guardant Health, Inc. (1.5%). Against the quarter before, it opened 25 positions, added to 7, trimmed 13 and sold out of 22.

Reported holdings$149.7M-8.3% on Q2 2026
Positions252+3 on Q2 2026
The largest ten15.0%of its reported holdings
Latest 13FQ3 2026filed 28 October 2026
Where the money is
Added toHeldTrimmed
FIX3.3%IESC2.4%GH1.5%ANET1.3%KLAC1.2%ICVT1.1%CECO1.1%WCC1.1%VWOB1.1%SNEX1.0%CWB1.0%LQD1.0%FN0.9%SMTC0.8%238 more81.3%

The 14 largest of its 252 positions, each sized by its share of the reported holdings, coloured by the change in shares against Q2 2026.

Reported holdings, quarter by quarter
Q3 2024: $97.6 million in 194 positions$97.6MQ3 24Q4 2024: $104.0 million in 204 positions$104MQ4 24Q1 2025: $92.0 million in 206 positions$92.0MQ1 25Q2 2025: $104.8 million in 208 positions$105MQ2 25Q3 2025: $125.4 million in 206 positions$125MQ3 25Q4 2025: $125.1 million in 219 positions$125MQ4 25Q1 2026: $119.5 million in 214 positions$120MQ1 26Q2 2026: $163.3 million in 249 positions$163MQ2 26Q3 2026: $149.7 million in 252 positions$150MQ3 26

What the fund reported holding at each quarter's end; hover a bar for the number of positions

What its reported holdings returned

Held through each quarter, the holdings it reported returned +12.8% over the 8 quarters to 30 September 2026, against +32.9% for the S&P 500.

Its reported holdingsThe S&P 500
90105120135Q3 24Q4 24Q1 25Q2 25Q3 25Q4 25Q1 26Q2 26Q3 26Its holdings +12.8%S&P 500 +32.9%

Not the fund's own return: each 13F's holdings are kept unchanged until the next one, so trades inside a quarter, dividends, cash and fees are left out. A rough guide to how its picks have done over time.

What it did on the quarter

Opened 25Added 7Held 207Trimmed 13Sold out 22
Opened: 25Added: 7Held: 207Trimmed: 13Sold out: 22

Its positions against its 13F for the quarter to 30 June 2026; a change under 0.1% of a position counts as held

Opened 25

  1. Neptune Insurance Holdings Inc. NP$720,673
  2. Brown & Brown, Inc. BRO$593,775
  3. Cognex Corp. CGNX$509,460
  4. Waystar Holding Corp. WAY$508,067
  5. Archrock, Inc. AROC$451,321
  6. Adma Biologics, Inc. ADMA$436,305
  7. Agilysys Inc. AGYS$427,152
  8. Gigacloud Technology Inc. GCT$421,192

and 17 more in the table below

Added to 7

  1. StoneX Group Inc. SNEX+7,875 shares · +50%
  2. Ceco Environmental Corp. Com CECO+7,100 shares · +41%
  3. Customers Bancorp, Inc. CUBI+6,350 shares · +131%
  4. UMB Financial Corp. UMBF+3,500 shares · +167%
  5. Argan Inc. AGX+1,200 shares · +179%
  6. Axos Financial, Inc. AX+5,150 shares · +86%
  7. Hut 8 Corp. HUT+1,350 shares · +63%

Trimmed 13

  1. iShares Trust Conv BD ETF ICVT-5,000 shares · -25%
  2. SPDR Blmbg Barclays Convert Secs ETF CWB-5,000 shares · -25%
  3. Freedom Holding Corp. FRHC-2,350 shares · -64%
  4. iShares Trust PFF-12,000 shares · -38%
  5. Mueller Industries Inc. MLI-5,700 shares · -23%
  6. Vanguard Whitehall FDS VWOB-5,000 shares · -17%
  7. SPX Technologies, Inc. SPXC-1,550 shares · -36%
  8. Hawkins Inc. HWKN-2,050 shares · -36%

and 5 more in the table below

Sold out of 22

  1. Construction Partners, Inc. ROAD$570,096 last quarter
  2. Cipher Digital Inc. CIFR$482,650 last quarter
  3. Topbuild Corp. BLD$460,889 last quarter
  4. Universal Technical Institute Inc. UTI$361,407 last quarter
  5. Marex Group PLC MRX$359,605 last quarter
  6. Ionis Pharmaceuticals Inc. IONS$348,876 last quarter
  7. Pagseguro Digital Ltd PAGS$342,090 last quarter
  8. Catalyst Pharmaceuticals Inc. CPRX$325,301 last quarter

What it holds

CompanySharesValueOf its bookChange in shares
Comfort Systems USA Inc. FIX3.0K$4.9 million3.27%no change
IES Holdings, Inc. IESC11.0K$3.5 million2.36%no change
Guardant Health, Inc. GH12.5K$2.2 million1.49%no change
Arista Networks, Inc. ANET9.8K$2.0 million1.33%no change
KLA Corp. KLAC8.9K$1.7 million1.16%no change
iShares Trust Conv BD ETF ICVT15.0K$1.7 million1.13%-5.0K
Ceco Environmental Corp. Com CECO24.3K$1.7 million1.13%+7.1K
Wesco International Inc. WCC4.5K$1.6 million1.09%no change
Vanguard Whitehall FDS VWOB25.0K$1.6 million1.05%-5.0K
StoneX Group Inc. SNEX23.6K$1.5 million1.02%+7.9K
SPDR Blmbg Barclays Convert Secs ETF CWB15.0K$1.5 million1.01%-5.0K
iShares Trust LQD14.0K$1.4 million0.96%-1.0K
Fabrinet FN3.1K$1.3 million0.89%no change
Semtech Corp. SMTC6.8K$1.2 million0.82%no change
Mueller Industries Inc. MLI19.1K$1.2 million0.77%-5.7K
Bloom Energy Corp. BE4.2K$1.1 million0.77%no change
Xometry Inc. XMTR11.1K$1.1 million0.76%no change
Medpace Holdings, Inc. MEDP1.8K$1.1 million0.75%no change
Datadog, Inc. DDOG4.0K$1.1 million0.73%no change
Camtek Ltd CAMT7.0K$1.1 million0.73%no change
Lumentum Holdings Inc. LITE1.1K$1.1 million0.73%no change
ACM Research, Inc. ACMR13.3K$1.1 million0.72%no change
Interactive Brokers Group, Inc. IBKR12.4K$1.1 million0.71%no change
FirstCash Holdings, Inc. FCFS5.0K$1.0 million0.70%no change
Digi International Inc. DGII13.7K$1.0 million0.70%no change
Raymond James Financial Inc. RJF6.5K$1.0 million0.68%no change
Nova Ltd NVMI2.6K$1.0 million0.68%-580
LifeStance Health Group, Inc. LFST83.6K$1.0 million0.67%no change
Twist Bioscience Corp. TWST5.1K$985,5240.66%no change
RBC Bearings Inc. RBC2.0K$983,4830.66%no change
RingCentral, Inc. RNG13.1K$974,8350.65%no change
Ftai Aviation Ltd. FTAI5.8K$968,7740.65%no change
Axos Financial, Inc. AX11.2K$965,2560.64%+5.2K
Penumbra Inc. PEN3.0K$955,0200.64%no change
Unity Software Inc. U22.6K$922,9720.62%no change
Insmed Inc. INSM7.9K$904,5600.60%no change
Woodward, Inc. WWD2.8K$903,6230.60%no change
Axsome Therapeutics, Inc. AXSM4.8K$894,2920.60%no change
Celestica Inc. CLS2.5K$885,5040.59%no change
Fortinet, Inc. FTNT5.0K$884,8620.59%no change
Monolithic Power Systems, Inc. MPWR650$875,6930.59%no change
LPL Financial Holdings Inc. LPLA2.9K$871,5300.58%no change
Halozyme Therapeutics, Inc. HALO7.8K$866,6400.58%no change
HA Sustainable Infrastructure Capital, Inc. HASI23.6K$843,5610.56%no change
Palo Alto Networks Inc. PANW2.1K$830,3780.55%no change
Customers Bancorp, Inc. CUBI11.2K$828,8000.55%+6.3K
Installed Building Products, Inc. IBP4.3K$825,0840.55%no change
Gold Fields Ltd GFI22.8K$821,7300.55%no change
IonQ, Inc. IONQ18.7K$820,1820.55%no change
Grail, Inc. GRAL5.8K$805,6900.54%no change
Axon Enterprise, Inc. AXON1.9K$792,2250.53%no change
Ensign Group, Inc. ENSG4.6K$791,2000.53%no change
Chefs' Warehouse, Inc. CHEF7.0K$790,7990.53%no change
Modine Manufacturing Co. MOD4.2K$776,8800.52%no change
iShares Trust HYG10.0K$772,1000.52%no change
TG Therapeutics, Inc. TGTX13.7K$764,1860.51%no change
Curtiss Wright Corp. CW1.4K$761,3480.51%no change
Corcept Therapeutics Inc. CORT6.5K$748,9950.50%no change
Applied Digital Corp. APLD30.4K$739,6300.49%no change
Casey's General Stores, Inc. CASY1.2K$730,1520.49%no change
UMB Financial Corp. UMBF5.6K$728,0560.49%+3.5K
Performance Food Group Co. PFGC7.9K$721,0990.48%no change
Neptune Insurance Holdings Inc. NP26.4K$720,6730.48%new
Argan Inc. AGX1.9K$706,7670.47%+1.2K
TD Synnex Corp. SNX2.7K$693,4950.46%no change
Embraer S.a. EMBJ9.2K$692,9440.46%no change
ITT Inc. ITT3.3K$666,0060.44%no change
Krystal Biotech, Inc. KRYS2.0K$665,1200.44%no change
Denali Therapeutics Inc. DNLI32.1K$663,5070.44%no change
KKR & Co. Inc. KKR7.2K$657,3600.44%no change
Life Time Group Holdings, Inc. LTH16.4K$656,0260.44%no change
DigitalOcean Holdings, Inc. DOCN4.9K$653,6110.44%no change
Hinge Health Inc. HNGE6.7K$651,5080.44%no change
Pacs Group, Inc. PACS15.6K$648,1800.43%no change
Forgent Power Solutions Inc FPS17.2K$643,9680.43%no change
BWX Technologies, Inc. BWXT4.7K$643,9000.43%no change
SharkNinja, Inc. SN3.5K$630,4200.42%no change
Stock Yards Bancorp, Inc. SYBT8.1K$624,4290.42%no change
Saia Inc. SAIA1.8K$614,0820.41%no change
Lithia Motors Inc. LAD2.1K$612,8430.41%no change
Sunbelt Rentals Holdings, Inc. SUNB8.2K$600,3220.40%no change
Brown & Brown, Inc. BRO9.8K$593,7750.40%new
iShares Trust PFF20.0K$590,0000.39%-12.0K
Esco Technologies Inc. ESE2.2K$589,8700.39%no change
APi Group Corp. APG15.2K$584,7900.39%no change
Ciena Corp. CIEN1.6K$580,5030.39%no change
Franklin Electric Co. Inc. FELE6.0K$575,3400.38%no change
Dlocal Ltd DLO41.5K$571,0400.38%no change
Dave Inc. DAVE1.8K$562,6430.38%no change
Pampa Energia S A PAM7.2K$559,9440.37%no change
Hamilton Insurance Group, Ltd. HG16.9K$558,3760.37%no change
HCI Group, Inc. HCI3.2K$556,2240.37%no change
Core & Main, Inc. CNM13.3K$551,6840.37%no change
Beam Therapeutics Inc. BEAM22.6K$551,3480.37%no change
Rush Street Interactive, Inc. RSI26.9K$546,8770.37%no change
Teledyne Technologies Inc. TDY900$546,1290.36%no change
Bruker Corp. BRKR8.4K$543,9000.36%no change
Western Alliance Bancorporation WAL7.2K$540,7200.36%no change
Oscar Health, Inc. OSCR17.4K$536,6160.36%no change
Neurocrine Biosciences Inc. NBIX3.8K$531,9000.36%no change
Rambus Inc. RMBS5.0K$528,4620.35%no change
Tyler Technologies Inc. TYL1.6K$525,6900.35%no change
Ralph Lauren Corp. RL1.5K$518,4020.35%no change
Credo Technology Group Holding Ltd. CRDO2.6K$516,1940.34%no change
Stifel Financial Corp. SF7.3K$514,7940.34%no change
Acadia Pharmaceuticals Inc. ACAD25.4K$512,8180.34%no change
Cytokinetics Inc. CYTK7.8K$510,8030.34%no change
Cognex Corp. CGNX8.4K$509,4600.34%new
Waystar Holding Corp. WAY20.1K$508,0670.34%new
AZZ Inc. AZZ3.8K$503,9630.34%no change
PDF Solutions Inc. PDFS9.6K$487,5280.33%no change
Houlihan Lokey, Inc. HLI3.9K$486,4090.32%no change
Globus Medical Inc. GMED6.4K$479,3600.32%no change
Mirum Pharmaceuticals, Inc. MIRM5.6K$478,6880.32%no change
InterDigital, Inc. IDCC1.4K$472,8020.32%no change
Graham Corp. GHM5.5K$470,3900.31%no change
Mastec Inc. MTZ2.2K$469,9640.31%no change
NCR Atleos Corp. NATL10.4K$469,8720.31%no change
Texas Pacific Land Corp. TPL1.4K$469,1950.31%no change
United States Lime & Minerals Inc. USLM4.1K$466,5790.31%-2.1K
Hawkins Inc. HWKN3.7K$466,2000.31%-2.0K
PulteGroup Inc. PHM4.0K$464,2400.31%no change
Haemonetics Corp. HAE4.4K$463,3200.31%no change
Renaissancere Holdings Ltd. RNR1.4K$461,4340.31%no change
SPX Technologies, Inc. SPXC2.7K$457,8120.31%-1.6K
Zurn Elkay Water Solutions Corp. ZWS9.8K$453,0830.30%no change
Archrock, Inc. AROC14.9K$451,3210.30%new
Clean Harbors Inc. CLH1.4K$449,8340.30%no change
Cavco Industries, Inc. CVCO800$448,2080.30%no change
Victory Capital Holdings, Inc. VCTR4.0K$447,9300.30%no change
On Holding AG ONON14.9K$442,6700.30%no change
Adma Biologics, Inc. ADMA43.5K$436,3050.29%new
Ondas Inc. ONDS59.2K$434,3030.29%no change
Cactus, Inc. WHD7.0K$432,4290.29%no change
Travere Therapeutics, Inc. TVTX7.3K$429,8240.29%no change
Integer Holdings Corp. ITGR3.4K$429,5900.29%no change
BBB Foods Inc. TBBB8.2K$429,0160.29%no change
Agilysys Inc. AGYS4.4K$427,1520.29%new
Sezzle Inc. SEZL4.0K$426,7580.29%no change
Synchrony Financial SYF6.0K$425,8200.28%no change
Arcutis Biotherapeutics, Inc. ARQT16.0K$422,8800.28%no change
Gigacloud Technology Inc. GCT8.2K$421,1920.28%new
Relay Therapeutics, Inc. RLAY23.2K$418,7600.28%no change
ExlService Holdings, Inc. EXLS12.1K$415,9980.28%no change
Balchem Corp. BCPC2.5K$412,4000.28%no change
Marex Group Limited MRX5.9K$411,5840.27%new
Allegro Microsystems, Inc. ALGM11.3K$410,7550.27%no change
Korn Ferry KFY5.7K$408,0630.27%no change
argenx SE ARGX425$407,5370.27%no change
Ligand Pharmaceuticals Inc. LGND1.3K$406,0810.27%no change
Tootsie Roll Industries Inc. TR10.6K$398,5800.27%no change
Kodiak Gas Services, Inc. KGS7.5K$397,2750.27%no change
Dycom Industries Inc. DY1.5K$397,1620.27%-850
PTC Inc. PTC2.8K$392,8400.26%no change
Navan Inc. NAVN18.6K$391,4640.26%no change
Tarsus Pharmaceuticals, Inc. TARS5.0K$389,1200.26%no change
e.l.f. Beauty, Inc. ELF3.9K$388,7350.26%new
Exelixis, Inc. EXEL6.7K$388,4270.26%no change
Heico Corp. HEI1.3K$388,0700.26%no change
Futu Hldgs Ltd FUTU3.5K$386,9250.26%no change
Iren Ltd. IREN9.4K$386,3160.26%no change
Samsara Inc. IOT10.1K$385,1130.26%no change
Select Water Solutions, Inc. WTTR19.4K$384,9160.26%no change
nVent Electric plc NVT2.4K$384,8880.26%no change
Liquidia Corp. LQDA12.7K$384,3020.26%no change
V2X, Inc. VVX5.4K$382,1580.26%no change
Visteon Corp. VC4.3K$377,0580.25%no change
Enova International, Inc. ENVA2.2K$375,9980.25%no change
Slide Insurance Holdings, Inc. SLDE16.9K$375,9240.25%new
CSW Industrials, Inc. CSW1.3K$374,5040.25%no change
Ategrity Specialty in Co. Ho ASIC14.7K$374,3080.25%no change
Kadant Inc. KAI1.4K$372,6660.25%no change
RadNet, Inc. RDNT5.3K$368,8290.25%no change
WisdomTree, Inc. WT15.2K$367,9940.25%new
RLI Corp. RLI6.7K$367,8120.25%new
Billiontoone Inc. BLLN3.5K$367,2180.25%no change
Alkermes plc. ALKS8.9K$360,6280.24%no change
Lantheus Holdings, Inc. LNTH3.6K$358,3080.24%no change
Veracyte, Inc. VCYT7.8K$356,8100.24%no change
Kinsale Capital Group, Inc. KNSL1.1K$355,0250.24%new
Transcat Inc. TRNS4.0K$353,6800.24%no change
Napco Security Technologies, Inc. NSSC9.9K$352,6380.24%no change
Dynatrace, Inc. DT6.0K$349,3270.23%new
Old National Bancorp ONB14.2K$348,6560.23%no change
CBRE Group, Inc. CBRE2.7K$346,8690.23%no change
Corporacion Amer Arpts S A CAAP13.6K$345,9840.23%no change
Patria Investments Limited PAX34.0K$345,1000.23%no change
Cellebrite Di Ltd CLBT30.6K$344,5560.23%new
TTM Technologies Inc. TTMI2.8K$343,9520.23%no change
Evolv Technologies Hldngs in EVLV72.5K$337,1250.23%no change
Smartfinancial Inc. SMBK6.8K$334,5980.22%no change
Blue Bird Corp. BLBD6.0K$334,3880.22%new
Riot Platforms, Inc. RIOT16.5K$332,4750.22%no change
Grupo Aeroportuario del Surest ASR1.4K$326,9140.22%no change
Liquidity Services Inc. LQDT7.6K$325,5080.22%new
Paymentus Holdings Inc. PAY10.6K$323,2520.22%new
Gorman Rupp Co. GRC4.3K$320,2640.21%no change
Guardian Pharmacy Svcs Inc. GRDN7.8K$320,1230.21%no change
Rhythm Pharmaceuticals, Inc. RYTM3.3K$314,2100.21%no change
Schneider National, Inc. SNDR9.8K$312,1300.21%no change
Scholar Rock Holding Corp. SRRK6.4K$309,2480.21%no change
Boot Barn Holdings, Inc. BOOT2.5K$307,1990.21%no change
Qxo, Inc. QXO26.3K$306,9790.21%new
Mercury General Corp. MCY3.1K$306,4350.20%no change
Primoris Services Corp. PRIM4.1K$305,5320.20%no change
Hut 8 Corp. HUT3.5K$301,3500.20%+1.4K
Lamb Weston Holdings, Inc. LW7.2K$300,1680.20%no change
WaterBridge Infrastructure LLC WBI10.6K$298,0720.20%no change
Aurinia Pharmaceuticals Inc. AUPH18.2K$294,7490.20%no change
Seacoast Banking Corp. of Florida SBCF9.2K$294,4280.20%no change
Axogen, Inc. AXGN7.0K$293,4400.20%no change
Helmerich & Payne, Inc. HP7.8K$289,6920.19%no change
Leonardo Drs, Inc. DRS7.9K$289,3770.19%no change
UFP Technologies Inc. UFPT965$286,4310.19%no change
Legend Biotech Corp. LEGN14.2K$283,4330.19%no change
Eagle Materials Inc. EXP1.6K$282,1830.19%-980
Arxis Inc. ARXS5.7K$281,5230.19%no change
Lovesac Company LOVE18.7K$281,4350.19%no change
Piper Sandler Companies PIPR4.2K$279,7130.19%no change
AAR Corp. AIR2.8K$279,0430.19%no change
Granite Construction Inc. GVA2.4K$278,1840.19%no change
Skyward Specialty Insurance Group, Inc. SKWD5.2K$277,2000.19%new
BridgeBio Pharma, Inc. BBIO4.2K$276,3600.18%no change
Toast, Inc. TOST9.4K$272,5060.18%no change
Hecla Mining Co. HL15.8K$268,2230.18%no change
Transportadora De Gas Sur TGS10.3K$267,2850.18%no change
Coeur Mining, Inc. CDE15.2K$266,6400.18%no change
Clear Secure, Inc. YOU6.3K$266,3830.18%no change
Pennant Group Inc. PNTG6.8K$265,2000.18%no change
Loar Holdings Inc. LOAR4.2K$261,4600.17%new
Netstreit Corp. NTST14.7K$259,0120.17%no change
Goosehead Insurance, Inc. GSHD5.7K$258,5520.17%new
Flywire Corp. FLYW14.7K$257,2500.17%no change
Copart Inc. CPRT9.4K$256,4320.17%no change
CareTrust REIT, Inc. CTRE7.0K$256,0600.17%new
Wafd Inc. WAFD8.4K$252,9090.17%no change
Madrigal Pharmaceuticals, Inc. MDGL500$251,9800.17%no change
Interface Inc. TILE7.2K$248,5400.17%no change
Virtu Financial, Inc. VIRT4.3K$239,9460.16%new
Wise Group PLC Ord SHS Class A WSE21.0K$239,1900.16%no change
Stoke Therapeutics, Inc. STOK9.2K$237,9000.16%no change
Applied Optoelectronics, Inc. AAOI2.4K$233,2610.16%no change
Flowco Holdings Inc. FLOC12.6K$228,0600.15%no change
Freedom Holding Corp. FRHC1.4K$225,8550.15%-2.4K
Federal Signal Corp. FSS2.0K$221,5800.15%no change
Rollins Inc. ROL7.3K$219,8760.15%no change
Deckers Outdoor Corp. DECK2.8K$218,7920.15%no change
D-Wave Quantum Inc. QBTS13.1K$217,0670.15%no change
Etoro Group Ltd ETOR8.3K$213,3100.14%no change
Texas Roadhouse, Inc. TXRH1.3K$207,9320.14%no change
Bancorp, Inc. TBBK4.3K$207,0880.14%no change
Ultragenyx Pharmaceutical Inc. RARE10.8K$161,5730.11%no change
Every US-listed position in the fund's 13F for the quarter ended 30 September 2026, by the value it reported.
Read moreChange is shares against its 13F for the quarter before; the 22 it sold out of are in the box above.