Yorktown Management & Research Co Inc
Registered adviserRegulatory profile
From Form ADV, the SEC filer profile, 13D/13G type codes and N-CEN, never from the name.
| Rosters | Regulatory AUM | Main clients |
|---|---|---|
| Apr 2026 to Nov 2026 | $677,085,322 | Registered funds and BDCs (100%) |
| Apr 2025 to Mar 2026 | $692,421,793 | Registered funds and BDCs (100%) |
| Apr 2024 to Mar 2025 | $678,288,835 | Registered funds and BDCs (100%) |
| May 2023 to Mar 2024 | $753,424,110 | Registered funds and BDCs (100%) |
| Apr 2023 | $753,424,110 | Registered funds and BDCs (100%) |
| Apr 2022 to Mar 2023 | $1,129,612,509 | Registered funds and BDCs (100%) |
Portfolio style
Measured from the filed 13F common-share book for Jun 30, 2026, the newest measured quarter, never from the firm's own description.
Closest benchmark: the S&P MidCap 400 as of 2026-06-30, active share 83.3%; sector active share 29.5% against the combined 13F book's sector weights.
Over time 26 measured quarters
How the bands are measured
Style bands measure the filed 13F common-share book each closed quarter, tested in this order. Unknown: under $10,000,000 of valued equity or 5 stocks. Index-like (100+ stocks): active share of 20% or less against the closest benchmark, which is the S&P 500, S&P MidCap 400, S&P SmallCap 600, Russell 1000, Russell 2000, Nasdaq-100 or Dow Jones Industrial Average (weighted by an index-tracking fund's reported holdings or the index's constituents nearest the quarter end, over the names resolved to companies, and only when those are 90%+ of its weight) or every 13F filer's combined book, or index series holding 80%+ of the registered fund assets it advises (N-CEN) and equal to 50%+ of its book. Systematic-like: 500+ stocks, 100%+ annual turnover and a top 10 weight of 25% or less. Concentrated: a top 10 weight of 60%+ or 12 or fewer effective positions. Diversified active: none of these. Turnover is the smaller of buys and sells over average equity value, summed over four quarters: low under 30%, high 100%+. Horizon is the value-weighted number of quarters each position has been held: short under 4, long 12+.
Clone Performance
Build a hypothetical price-return history from this filer's public 13F holdings.
View clone backtestPortfolio Concentration
252 tracked positions · as of Sep 30, 2026 · Δ vs Jun 30, 2026Portfolio Trend
Sector Breakdown
As of Sep 30, 2026| Sector | % Portfolio | Value |
|---|---|---|
| Industrials | 25.3% | $37,908,890 |
| Technology | 22.4% | $33,475,204 |
| Healthcare | 19.4% | $29,039,229 |
| Financial Services | 15.7% | $23,522,539 |
| Consumer Cyclical | 5.4% | $8,061,260 |
| Unclassified | 5.1% | $7,582,595 |
| Energy | 2.2% | $3,218,244 |
| Consumer Defensive | 2.0% | $3,028,394 |
| Basic Materials | 2.0% | $2,983,953 |
| Real Estate | 0.6% | $861,941 |
Last Quarter's Activity
Export CSVAdded To
Positions the filer increased| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| SNEX | StoneX Group Inc. | +7,875 | 23,625 | $1,527,120 | |
| CECO | Ceco Environmental Corp | +7,100 | 24,309 | $1,692,878 | |
| MLI | Mueller Industries Inc | +6,700 | 19,100 | $1,157,651 | |
| CUBI | Customers Bancorp, Inc. | +6,350 | 11,200 | $828,800 | |
| IESC | IES Holdings, Inc. | +5,510 | 11,020 | $3,538,301 | |
| AX | Axos Financial, Inc. | +5,150 | 11,150 | $965,255 | |
| UMBF | Umb Financial Corp | +3,500 | 5,600 | $728,056 | |
| HUT | Hut 8 Corp. | +1,350 | 3,500 | $301,350 | |
| AGX | Argan Inc | +1,200 | 1,870 | $706,766 | |
| No positions match the current search. | |||||
Trimmed
Positions the filer reduced| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| PFF | iShares Preferred and Income Securities ETF | −12,000 | 20,000 | $590,000 | |
| VWOB | VANGUARD EMERGING MARKETS GOVERNMENT BOND INDEX FUND | −5,000 | 25,000 | $1,578,250 | |
| CWB | State Street(R) SPDR(R) Bloomberg Convertible Securities ETF | −5,000 | 15,000 | $1,517,700 | |
| ICVT | iShares Convertible Bond ETF | −5,000 | 15,000 | $1,694,025 | |
| FRHC | Freedom Holding Corp. | −2,350 | 1,350 | $225,855 | |
| USLM | United States Lime & Minerals Inc | −2,100 | 4,125 | $466,578 | |
| HWKN | Hawkins Inc | −2,050 | 3,700 | $466,200 | |
| SPXC | SPX Technologies, Inc. | −1,550 | 2,700 | $457,812 | |
| LQD | iShares iBoxx $ Investment Grade Corporate Bond ETF | −1,000 | 14,000 | $1,430,520 | |
| EXP | Eagle Materials Inc | −980 | 1,650 | $282,183 | |
| DY | Dycom Industries Inc | −850 | 1,476 | $397,162 | |
| NVMI | Nova Ltd. | −580 | 2,640 | $1,016,928 | |
| No positions match the current search. | |||||
New Positions
Positions the filer opened this quarter| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| NP | Neptune Insurance Holdings Inc. | 26,350 | $720,672 | |
| BRO | Brown & Brown, Inc. | 9,750 | $593,775 | |
| CGNX | Cognex Corp | 8,400 | $509,460 | |
| WAY | Waystar Holding Corp. | 20,050 | $508,067 | |
| AROC | Archrock, Inc. | 14,900 | $451,321 | |
| ADMA | Adma Biologics, Inc. | 43,500 | $436,305 | |
| AGYS | Agilysys Inc | 4,400 | $427,152 | |
| GCT | GigaCloud Technology Inc | 8,150 | $421,192 | |
| ELF | e.l.f. Beauty, Inc. | 3,850 | $388,734 | |
| SLDE | Slide Insurance Holdings, Inc. | 16,850 | $375,923 | |
| WT | WisdomTree, Inc. | 15,150 | $367,993 | |
| RLI | Rli Corp | 6,650 | $367,811 | |
| KNSL | Kinsale Capital Group, Inc. | 1,100 | $355,025 | |
| DT | Dynatrace, Inc. | 6,050 | $349,327 | |
| CLBT | Cellebrite DI Ltd. | 30,600 | $344,556 | |
| BLBD | Blue Bird Corp | 6,025 | $334,387 | |
| LQDT | Liquidity Services Inc | 7,600 | $325,508 | |
| PAY | Paymentus Holdings, Inc. | 10,550 | $323,252 | |
| QXO | QXO, Inc. | 26,260 | $306,979 | |
| SKWD | Skyward Specialty Insurance Group, Inc. | 5,250 | $277,200 | |
| LOAR | Loar Holdings Inc. | 4,250 | $261,460 | |
| GSHD | Goosehead Insurance, Inc. | 5,700 | $258,552 | |
| CTRE | CareTrust REIT, Inc. | 7,000 | $256,060 | |
| VIRT | Virtu Financial, Inc. | 4,350 | $239,946 | |
| No positions match the current search. | ||||
Sold Out
Positions the filer fully exited| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| ROAD | Construction Partners, Inc. | 4,800 | $570,096 | |
| CIFR | Cipher Digital Inc. | 19,700 | $482,650 | |
| — | 1,300 | $460,889 | ||
| UTI | Universal Technical Institute Inc | 8,450 | $361,406 | |
| IONS | Ionis Pharmaceuticals Inc | 4,400 | $348,876 | |
| PAGS | PagSeguro Digital Ltd. | 37,800 | $342,090 | |
| — | 10,350 | $325,301 | ||
| — | 1,550 | $323,857 | ||
| — | 4,150 | $317,143 | ||
| — | 5,850 | $303,907 | ||
| NXT | Nextpower Inc. | 2,550 | $303,807 | |
| ALHC | Alignment Healthcare, Inc. | 12,300 | $292,863 | |
| FOUR | Shift4 Payments, Inc. | 5,700 | $277,248 | |
| ARX | Accelerant Holdings | 22,800 | $267,216 | |
| AMSC | American Superconductor Corp | 6,400 | $265,664 | |
| KLAR | Klarna Group plc | 12,800 | $259,072 | |
| WLFC | Willis Lease Finance Corp | 1,125 | $257,400 | |
| KEN | Kenon Holdings Ltd. | 3,600 | $240,696 | |
| POWL | Powell Industries Inc | 840 | $240,542 | |
| BYD | Boyd Gaming Corp | 2,700 | $238,491 | |
| RRC | Range Resources Corp | 5,400 | $200,826 | |
| No positions match the current search. | ||||
| Ticker | Company | Type | Shares | Value (USD) | % of Portfolio | History |
|---|---|---|---|---|---|---|
| FIX |
Comfort Systems USA Inc
Industrials
|
Held | 2,960 | $4,896,106 | 3.27% | |
| IESC |
IES Holdings, Inc.
Industrials
|
Added | 11,020 | $3,538,301 | 2.36% | |
| GH |
Guardant Health, Inc.
Healthcare
|
Held | 12,500 | $2,229,500 | 1.49% | |
| ANET |
Arista Networks, Inc.
Technology
|
Held | 9,800 | $1,995,182 | 1.33% | |
| KLAC |
Kla Corp
Technology
|
Held | 8,900 | $1,734,877 | 1.16% | |
| ICVT |
iShares Convertible Bond ETF
|
Reduced | 15,000 | $1,694,025 | 1.13% | |
| CECO |
Ceco Environmental Corp
Industrials
|
Added | 24,309 | $1,692,878 | 1.13% | |
| WCC |
Wesco International Inc
Industrials
|
Held | 4,550 | $1,636,134 | 1.09% | |
| VWOB |
VANGUARD EMERGING MARKETS GOVERNMENT BOND INDEX FUND
|
Reduced | 25,000 | $1,578,250 | 1.05% | |
| SNEX |
StoneX Group Inc.
Financial Services
|
Added | 23,625 | $1,527,120 | 1.02% | |
| CWB |
State Street(R) SPDR(R) Bloomberg Convertible Securities ETF
|
Reduced | 15,000 | $1,517,700 | 1.01% | |
| LQD |
iShares iBoxx $ Investment Grade Corporate Bond ETF
|
Reduced | 14,000 | $1,430,520 | 0.96% | |
| FN |
Fabrinet
Technology
|
Held | 3,150 | $1,336,450 | 0.89% | |
| SMTC |
Semtech Corp
Technology
|
Held | 6,850 | $1,221,697 | 0.82% | |
| MLI |
Mueller Industries Inc
Industrials
|
Added | 19,100 | $1,157,651 | 0.77% | |
| BE |
Bloom Energy Corp
Industrials
|
Held | 4,150 | $1,149,467 | 0.77% | |
| XMTR |
Xometry, Inc.
Industrials
|
Held | 11,050 | $1,136,492 | 0.76% | |
| MEDP |
Medpace Holdings, Inc.
Healthcare
|
Held | 1,800 | $1,123,524 | 0.75% | |
| DDOG |
Datadog, Inc.
Technology
|
Held | 4,000 | $1,095,400 | 0.73% | |
| CAMT |
Camtek Ltd
Technology
|
Held | 7,050 | $1,094,512 | 0.73% | |
| LITE |
Lumentum Holdings Inc.
Technology
|
Held | 1,125 | $1,092,667 | 0.73% | |
| ACMR |
ACM Research, Inc.
Technology
|
Held | 13,300 | $1,076,236 | 0.72% | |
| IBKR |
Interactive Brokers Group, Inc.
Financial Services
|
Held | 12,400 | $1,059,208 | 0.71% | |
| FCFS |
FirstCash Holdings, Inc.
Financial Services
|
Held | 4,950 | $1,045,588 | 0.70% | |
| DGII |
Digi International Inc
Technology
|
Held | 13,700 | $1,044,351 | 0.70% | |
| RJF |
Raymond James Financial Inc
Financial Services
|
Held | 6,450 | $1,019,229 | 0.68% | |
| NVMI |
Nova Ltd.
Technology
|
Reduced | 2,640 | $1,016,928 | 0.68% | |
| LFST |
LifeStance Health Group, Inc.
Healthcare
|
Held | 83,600 | $1,005,708 | 0.67% | |
| TWST |
Twist Bioscience Corp
Healthcare
|
Held | 5,100 | $985,524 | 0.66% | |
| RBC |
RBC Bearings INC
Industrials
|
Held | 1,970 | $983,483 | 0.66% | |
| RNG |
RingCentral, Inc.
Technology
|
Held | 13,050 | $974,835 | 0.65% | |
| FTAI |
FTAI Aviation Ltd.
Industrials
|
Held | 5,800 | $968,774 | 0.65% | |
| AX |
Axos Financial, Inc.
Financial Services
|
Added | 11,150 | $965,255 | 0.64% | |
| PEN |
Penumbra Inc
Healthcare
|
Held | 3,000 | $955,020 | 0.64% | |
| U |
Unity Software Inc.
Technology
|
Held | 22,550 | $922,971 | 0.62% | |
| INSM |
INSMED Inc
Healthcare
|
Held | 7,925 | $904,559 | 0.60% | |
| WWD |
Woodward, Inc.
Industrials
|
Held | 2,750 | $903,622 | 0.60% | |
| AXSM |
Axsome Therapeutics, Inc.
Healthcare
|
Held | 4,850 | $894,291 | 0.60% | |
| CLS |
Celestica Inc
Technology
|
Held | 2,450 | $885,503 | 0.59% | |
| FTNT |
Fortinet, Inc.
Technology
|
Held | 4,950 | $884,862 | 0.59% | |
| MPWR |
Monolithic Power Systems, Inc.
Technology
|
Held | 650 | $875,693 | 0.59% | |
| LPLA |
LPL Financial Holdings Inc.
Financial Services
|
Held | 2,850 | $871,530 | 0.58% | |
| HALO |
Halozyme Therapeutics, Inc.
Healthcare
|
Held | 7,850 | $866,640 | 0.58% | |
| HASI |
HA Sustainable Infrastructure Capital, Inc.
Financial Services
|
Held | 23,550 | $843,561 | 0.56% | |
| PANW |
Palo Alto Networks Inc
Technology
|
Held | 2,090 | $830,377 | 0.55% | |
| CUBI |
Customers Bancorp, Inc.
Financial Services
|
Added | 11,200 | $828,800 | 0.55% | |
| IBP |
Installed Building Products, Inc.
Consumer Cyclical
|
Held | 4,300 | $825,084 | 0.55% | |
| GFI |
Gold Fields Ltd
Basic Materials
|
Held | 22,750 | $821,730 | 0.55% | |
| IONQ |
IonQ, Inc.
Technology
|
Held | 18,700 | $820,182 | 0.55% | |
| GRAL |
GRAIL, Inc.
Healthcare
|
Held | 5,750 | $805,690 | 0.54% |
Showing the top 50 of 252 positions. Create a free account to see every position, past quarters, search, filters and CSV export.
Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.