CIK: 0001313559
Total reported value
$119.5M
Reporting period: 2026-03-31 · Number of holdings: 214
Yorktown Management & Research Co Inc disclosed 214 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $119.5M and a quarterly turnover rate of 43.6%.
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Yorktown Management & Research Co Inc's disclosed holdings carry a Herfindahl concentration index of 0.008 — mathematically equivalent to about 123 equally-sized positions, well below its 214 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.86), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 4% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Add FIX
-8.3% $1.2M
Trim LPLA
-60.3% -$1.3M
Add LQD
+75.0% $644.3K
Add IESC
0.0% $554.4K
Add NVMI
+18.1% $590.7K
Add CAMT
+35.6% $515.9K
Showing top 200 holdings (of 214 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | FIX | Comfort Systems USA INC | Stock-Industrials | 3.70% | +1.09% | -8.29% | |
| 2 | IESC | Ies Holdings INC | Stock-Industrials | 2.53% | +0.56% | — | |
| 3 | ICVT | Ishares Convertible Bond ETF | ETF-Other | 1.96% | -0.17% | -14.81% | |
| 4 | CWB | Ss Spdr Bb Conv Sec ETF | ETF-Other | 1.76% | — | -14.81% | |
| 5 | FN | Fabrinet | Stock-Tech | 1.66% | — | — | |
| 6 | VWOB | Vanguard Emerg Mkts Gov Bnd | ETF-Other | 1.65% | — | -9.09% | |
| 7 | NVMI | Nova Ltd. | Stock-Other | 1.37% | +0.53% | +18.13% | |
| 8 | MLI | Mueller Industries INC | Stock-Industrials | 1.34% | — | — | |
| 9 | LQD | Ishr Ibx Usd Invgd Cb Etf-ui | ETF-Corp Bonds | 1.28% | +0.58% | +75.00% | |
| 10 | PANW | Palo Alto Networks INC | Stock-Tech | 1.20% | +1.20% | NEW | |
| 11 | FTAI | FTAI Aviation Ltd. | Stock-Industrials | 1.19% | — | — | |
| 12 | KLAC | Kla CORP | Stock-Tech | 1.10% | — | — | |
| 13 | INSM | Insmed INC | Stock-Healthcare | 1.08% | -0.26% | -17.45% | |
| 14 | SNEX | Stonex Group INC | Stock-Financials | 1.06% | — | +50.00% | |
| 15 | WCC | Wesco International INC | Stock-Industrials | 1.04% | — | — | |
| 16 | ANET | Arista Networks INC | Stock-Tech | 1.01% | — | — | |
| 17 | AXON | Axon Enterprise INC | Stock-Industrials | 0.94% | -0.26% | — | |
| 18 | RBC | RBC Bearings INC | Stock-Industrials | 0.90% | — | — | |
| 19 | CAMT | Camtek Ltd. | Stock-Other | 0.89% | +0.45% | +35.58% | |
| 20 | GFI | Gold Fields Ltd-spons Adr | Stock-Materials | 0.86% | — | — | |
| 21 | PEN | Penumbra INC | Stock-Healthcare | 0.82% | — | — | |
| 22 | WWD | Woodward INC | Stock-Industrials | 0.82% | — | — | |
| 23 | PFF | Ishares Preferred & Income S | ETF-Other | 0.81% | — | -20.00% | |
| 24 | BWXT | Bwx Technologies INC | Stock-Industrials | 0.80% | — | — | |
| 25 | CW | Curtiss-wright CORP | Stock-Industrials | 0.80% | — | — | |
| 26 | RJF | Raymond James Financial INC | Stock-Financials | 0.78% | — | — | |
| 27 | FCFS | Firstcash Holdings INC | Stock-Financials | 0.78% | — | — | |
| 28 | MOD | Modine Manufacturing Co | Stock-Consumer Disc | 0.75% | +0.31% | — | |
| 29 | HWKN | Hawkins INC | Stock-Other | 0.74% | — | +11.65% | |
| 30 | PRIM | Primoris Services CORP | Stock-Industrials | 0.74% | — | — | |
| 31 | CASY | Casey's General Stores INC | Stock-Consumer Disc | 0.73% | — | — | |
| 32 | HASI | Ha Sustainable Infrastructur | Stock-Financials | 0.72% | — | — | |
| 33 | MEDP | Medpace Holdings INC | Stock-Healthcare | 0.72% | — | — | |
| 34 | IBKR | Interactive Brokers Gro-cl A | Stock-Financials | 0.70% | — | — | |
| 35 | GH | Guardant Health INC | Stock-Healthcare | 0.68% | — | +59.46% | |
| 36 | USLM | United States Lime & Mineral | Stock-Other | 0.68% | — | — | |
| 37 | HYG | Ishr Ibx Usd Hiyld Cb Etf-ui | ETF-High Yield | 0.67% | — | +25.00% | |
| 38 | LITE | Lumentum Holdings INC | Stock-Tech | 0.66% | +0.66% | NEW | |
| 39 | IBP | Installed Building Products | Stock-Consumer Disc | 0.64% | — | — | |
| 40 | CECO | Ceco Environmental CORP | Stock-Other | 0.64% | — | +32.99% | |
| 41 | APLD | Applied Digital CORP | Stock-Tech | 0.60% | — | — | |
| 42 | MPWR | Monolithic Power Systems INC | Stock-Tech | 0.59% | — | — | |
| 43 | MTZ | Mastec INC | Stock-Industrials | 0.59% | — | — | |
| 44 | ENSG | Ensign Group Inc/the | Stock-Healthcare | 0.59% | — | — | |
| 45 | CLS | Celestica INC | Stock-Tech | 0.58% | — | — | |
| 46 | TPL | Texas Pacific Land CORP | Stock-Energy | 0.57% | — | — | |
| 47 | PFGC | Performance Food Group Co | Stock-Consumer Staples | 0.56% | — | — | |
| 48 | KKR | Kkr & Co INC | Stock-Financials | 0.56% | — | — | |
| 49 | DGII | Digi International INC | Stock-Other | 0.55% | — | — | |
| 50 | CNM | Core & Main Inc-class A | Stock-Industrials | 0.55% | — | — |
Performance for Q3 2026
-0.7%
Performance Last 4 Quarters
+11.4%
Based on 77% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 214 | $119.5M | 44 | |
| 2025-12-31 | 219 | $125.1M | 38 | |
| 2025-09-30 | 206 | $125.4M | 75 | |
| 2025-06-30 | 208 | $104.8M | 0 | |
| 2025-03-31 | 206 | $92.0M | 100 | |
| 2024-12-31 | 204 | $104.0M | 0 | |
| 2024-09-30 | 194 | $97.6M | 0 | |
| 2024-06-30 | 189 | $93.1M | 0 | |
| 2024-03-31 | 217 | $105.1M | 0 | |
| 2023-12-31 | 200 | $95.8M | 0 | |
| 2023-09-30 | 212 | $88.9M | 0 | |
| 2023-06-30 | 200 | $93.0M | 0 | |
| 2023-03-31 | 195 | $92.7M | 0 | |
| 2022-12-31 | 181 | $81.8M | 0 | |
| 2022-09-30 | 191 | $77.2M | 0 | |
| 2022-06-30 | 185 | $77.5M | 0 | |
| 2022-03-31 | 216 | $117.9M | 0 | |
| 2021-12-31 | 247 | $148.1M | 0 | |
| 2021-09-30 | 248 | $133.0M | 0 | |
| 2021-06-30 | 242 | $127.5M | 97 | |
| 2021-03-31 | 247 | $120.4M | 49 | |
| 2020-12-31 | 219 | $111.1M | 47 | |
| 2020-09-30 | 235 | $107.0M | 49 | |
| 2020-06-30 | 253 | $111.6M | 98 | |
| 2020-03-31 | 237 | $98.9M | 89 | |
| 2019-12-31 | 284 | $186.2M | 27 | |
| 2019-09-30 | 296 | $185.7M | 65 | |
| 2019-06-30 | 296 | $264.9M | 59 | |
| 2019-03-31 | 311 | $309.5M | 38 | |
| 2018-12-31 | 310 | $301.7M | 42 | |
| 2018-09-30 | 342 | $341.6M | 40 | |
| 2018-06-30 | 343 | $344.8M | 32 | |
| 2018-03-31 | 367 | $337.7M | 24 | |
| 2017-12-31 | 362 | $346.7M | 81 | |
| 2017-09-30 | 369 | $381.5M | 52 | |
| 2017-06-30 | 303 | $313.6M | 44 | |
| 2017-03-31 | 341 | $383.6M | 29 | |
| 2016-12-31 | 363 | $394.4M | 69 | |
| 2016-09-30 | 289 | $459.4M | 36 | |
| 2016-06-30 | 305 | $439.9M | 35 | |
| 2016-03-31 | 360 | $515.4M | 44 | |
| 2015-12-31 | 389 | $565.0M | 46 | |
| 2015-09-30 | 452 | $604.1M | 56 | |
| 2015-06-30 | 474 | $571.0M | 32 | |
| 2015-03-31 | 475 | $553.3M | 53 | |
| 2014-12-31 | 432 | $478.6M | 32 | |
| 2014-09-30 | 456 | $521.2M | 19 | |
| 2014-06-30 | 475 | $538.1M | 35 | |
| 2014-03-31 | 454 | $525.2M | 20 | |
| 2013-12-31 | 414 | $497.0M | 23 | |
| 2013-09-30 | 368 | $467.2M | 41 | |
| 2013-06-30 | 330 | $474.2M | 0 |
Yorktown Management & Research Co Inc's most significant position changes for 2026-03-31: Sold out: Cyberark Software LTD; New buy: Palo Alto Networks INC (PANW); Sold out: Robinhood Markets INC - A (HOOD); Sold out: Sportradar Group AG (SRAD); Sold out: Accelerant Holdings (ARX).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | FIX | Comfort Systems USA INC | +1.1% | -8.29% | Trim |
| 2 | LQD | Ishr Ibx Usd Invgd Cb Etf-ui | +0.6% | +75.00% | Add |
| 3 | IESC | Ies Holdings INC | +0.6% | — | Unchanged |
| 4 | NVMI | Nova Ltd. | +0.5% | +18.13% | Add |
| 5 | CAMT | Camtek Ltd. | +0.5% | +35.58% | Add |
| 6 | ESE | Esco Technologies INC | +0.3% | +97.78% | Add |
| 7 | MOD | Modine Manufacturing Co | +0.3% | — | Unchanged |
| 8 | ICVT | Ishares Convertible Bond ETF | -0.2% | -14.81% | Trim |
| 9 | DLO | DLocal Limited | -0.2% | -31.63% | Trim |
| 10 | AXON | Axon Enterprise INC | -0.3% | — | Unchanged |
| 11 | INSM | Insmed INC | -0.3% | -17.45% | Trim |
| 12 | EXLS | Exlservice Holdings INC | -0.3% | -33.15% | Trim |
| 13 | KNSL | Kinsale Capital Group INC | -0.4% | -66.33% | Trim |
| 14 | LPLA | Lpl Financial Holdings INC | -1% | -60.30% | Trim |
| 15 | ✓ | Cyberark Software LTD | — | EXIT | Sold out |
| 16 | PANW | Palo Alto Networks INC | — | NEW | New buy |
| 17 | HOOD | Robinhood Markets INC - A | — | EXIT | Sold out |
| 18 | SRAD | Sportradar Group AG | — | EXIT | Sold out |
| 19 | ARX | Accelerant Holdings | — | EXIT | Sold out |
| 20 | LITE | Lumentum Holdings INC | — | NEW | New buy |
| 21 | IR | Ingersoll-rand INC | — | EXIT | Sold out |
| 22 | FIGR | Figure Technology Solut-cl A | — | EXIT | Sold out |
| 23 | GENI | Genius Sports Limited | — | EXIT | Sold out |
| 24 | LYFT | Lyft Inc-a | — | EXIT | Sold out |
| 25 | SMCI | Super Micro Computer INC | — | EXIT | Sold out |
| 26 | LOAR | Loar Holdings INC | — | EXIT | Sold out |
| 27 | SUNB | Sunbelt Rentals Holdings INC | — | NEW | New buy |
| 28 | AX | Axos Financial INC | — | NEW | New buy |
| 29 | PCOR | Procore Technologies INC | — | EXIT | Sold out |
| 30 | KTOS | Kratos Defense & Security | — | EXIT | Sold out |
| 31 | DORM | Dorman Products INC | — | EXIT | Sold out |
| 32 | NTSK | Netskope Inc-cl A | — | EXIT | Sold out |
| 33 | EVLV | Evolv Technologies Holdings | — | NEW | New buy |
| 34 | UPWK | Upwork INC | — | EXIT | Sold out |
| 35 | GHM | Graham CORP | — | NEW | New buy |
| 36 | DOCN | Digitalocean Holdings INC | — | NEW | New buy |
| 37 | KVYO | Klaviyo Inc-a | — | EXIT | Sold out |
| 38 | HQY | Healthequity INC | — | EXIT | Sold out |
| 39 | GSHD | Goosehead Insurance INC -a | — | EXIT | Sold out |
| 40 | 62C | Piper Sandler Cos | — | EXIT | Sold out |
| 41 | VSEC | Vse CORP | — | NEW | New buy |
| 42 | UBER | Uber Technologies INC | — | EXIT | Sold out |
| 43 | RYTM | Rhythm Pharmaceuticals INC | — | EXIT | Sold out |
| 44 | PIPR | Piper Sandler Cos | — | NEW | New buy |
| 45 | BMNR | Bitmine Immersion Technologi | — | NEW | New buy |
| 46 | DOCS | Doximity Inc-class A | — | EXIT | Sold out |
| 47 | 8TG | Thermon Group Holdings INC | — | NEW | New buy |
| 48 | CYTK | Cytokinetics INC | — | NEW | New buy |
| 49 | PDFS | Pdf Solutions INC | — | NEW | New buy |
| 50 | APPF | Appfolio INC - A | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-04-20 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-01-23 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-10-29 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-04 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-04-23 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-01-27 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-10-25 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-07-30 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-04-26 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-01-26 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-10-26 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-07-28 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-04-21 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-01-26 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-04 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-07-29 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-04-29 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-09 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-04 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-03 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-11 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-11 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-06 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-11 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-04-29 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-01-27 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-01 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-02 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-13 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-08 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-08 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-10 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-11 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-13 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-08 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-11 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-04 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-10 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-10-31 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-12 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-05 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-01-27 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-05 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-07-22 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-04-23 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-05 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-10-31 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-07-23 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-06 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-01-22 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-10-24 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-07-30 | 13F-HR | View on EDGAR |
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