YORKTOWN MANAGEMENT & RESEARCH CO INC
Q3 2026 Form 13-F
FOREST, VIRGINIA
CIK 0001313559
· CRD 105083
· SEC-registered investment adviser
$149.7M Reported Value Total
YORKTOWN MANAGEMENT AND RESEARCH CO INC reports 4 total accounts under management (AUM). There are 4 discretionary accounts valued at $677,085,322, and 0 non-discretionary accounts.
Source: Form ADV filed * Note that certain holdings are exempt from Form 13-F reporting, so the AUM totals may be greater than the Form 13-F total.
SEC Registered
Discretionary Manager
Source: Form ADV filed 2026-03-24
Reported value
$149.7M
Quarter over quarter
-9.7%
Holdings
252
Top-10 concentration
15.1%
Filing Structure
Holdings reported by
- Sapphire Star Partners LP (not a 13F filer in our records) · Q4 2017 – Q4 2018 · declared by one filing
Key People
Form ADV owners & control persons
David Dillard Basten
PRESIDENT & DIRECTOR
David Mason Basten
SHAREHOLDER
Leslie Mason Basten
DIRECTOR
Filing Navigation
Coverage begins with the second quarter of 2013. Earlier quarters are not shown while their accuracy is being verified.
13F Metrics
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Q3 2026 13F record
Q3 2026 13F filing summary
| Period of report | September 30, 2026 |
|---|---|
| Filed | October 28, 2026 |
| Form | 13F-HR |
| Reported value | $149.7M |
| Positions | 252 |
| Change in reported value | -8.3% |
| New positions | 25 |
| Exited positions | 22 |
| Position turnover | 17.2% |
| Top-10 concentration | 15.1% |
13F filings by quarter
| Quarter | Positions | Value |
|---|---|---|
|
Q3 2026 13F
Filed Oct 28, 2026
|
252 | $149.7M |
|
Q2 2026 13F
Filed Jul 23, 2026
|
249 | $163.3M |
|
Q1 2026 13F
Filed Apr 20, 2026
|
214 | $119.5M |
|
Q4 2025 13F
Filed Jan 23, 2026
|
219 | $125.1M |
|
Q3 2025 13F
Filed Oct 29, 2025
|
206 | $125.4M |
|
Q2 2025 13F
Filed Aug 4, 2025
|
208 | $104.8M |
|
Q1 2025 13F
Filed Apr 23, 2025
|
206 | $92.0M |
|
Q4 2024 13F
Filed Jan 27, 2025
|
204 | $104.0M |
|
Q3 2024 13F
Filed Oct 25, 2024
|
194 | $97.6M |
|
Q2 2024 13F
Filed Jul 30, 2024
|
189 | $93.1M |
|
Q1 2024 13F
Filed Apr 26, 2024
|
217 | $105.1M |
|
Q4 2023 13F
Filed Jan 26, 2024
|
200 | $95.8M |
|
Q3 2023 13F
Filed Oct 26, 2023
|
211 | $88.9M |
|
Q2 2023 13F
Filed Jul 28, 2023
|
200 | $93.0M |
|
Q1 2023 13F
Filed Apr 21, 2023
|
195 | $92.7M |
|
Q4 2022 13F
Filed Jan 26, 2023
|
181 | $81.8M |
|
Q3 2022 13F
Filed Nov 4, 2022
|
191 | $77.2M |
|
Q2 2022 13F
Filed Jul 29, 2022
|
185 | $77.5M |
|
Q1 2022 13F
Filed Apr 29, 2022
|
216 | $117.9M |
|
Q4 2021 13F
Filed Feb 9, 2022
|
247 | $148.1M |
34 earlier quarters on file — choose one from the quarter menu above.
Top 20 holdings · Q3 2026
| # | Holding | Reported value | % of portfolio |
|---|---|---|---|
| 1 | FIX Comfort Systems USA, Inc. | $4.9M | 3.27% |
| 2 | IESC IES Holdings, Inc. | $3.5M | 2.36% |
| 3 | GH Guardant Health, Inc. | $2.2M | 1.49% |
| 4 | ANET Arista Networks, Inc. | $2.0M | 1.33% |
| 5 | KLAC KLA Corporation | $1.7M | 1.16% |
| 6 | ICVT iShares Convertible Bond ETF | $1.7M | 1.13% |
| 7 | CECO CECO Environmental Corporation | $1.7M | 1.13% |
| 8 | WCC WESCO International, Inc. | $1.6M | 1.09% |
| 9 | VWOB Vanguard Emerging Markets Government Bond ETF | $1.6M | 1.05% |
| 10 | SNEX StoneX Group, Inc. | $1.5M | 1.02% |
| 11 | CWB SPDR Bloomberg Convertible Securities ETF | $1.5M | 1.01% |
| 12 | LQD iShares iBoxx $ Investment Grade Corporate Bond | $1.4M | 0.96% |
| 13 | FN Fabrinet | $1.3M | 0.89% |
| 14 | SMTC Semtech Corporation | $1.2M | 0.82% |
| 15 | MLI Mueller Industries, Inc. | $1.2M | 0.77% |
| 16 | BE Bloom Energy Corporation | $1.1M | 0.77% |
| 17 | XMTR Xometry, Inc. | $1.1M | 0.76% |
| 18 | MEDP Medpace Holdings, Inc. | $1.1M | 0.75% |
| 19 | DDOG Datadog, Inc. | $1.1M | 0.73% |
| 20 | CAMT Camtek Ltd. | $1.1M | 0.73% |
Values as reported on the Q3 2026 Form 13F. Every position is in the holdings table below.