3 Diversified Financial Services stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

Texas Pacific Land Trust (TPL) earns a B this week, jumping up from last week’s grade of C. Texas Pacific Land Trust derives revenue from all avenues of managing land, such as royalties from oil and gas and land sales. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of TPL stock.

This is a strong week for Berkshire Hathaway Inc. Class B (BRK.B). The company’s rating climbs to B from the previous week’s C. Berkshire Hathaway Inc. Class B is a publicly owned investment manager that primarily engages in the insurance and reinsurance of property and casualty risks business. For more information, get Portfolio Grader’s complete analysis of BRK.B stock.

The rating of Marlin Business Services Corp. (MRLN) moves up this week, rising from a C to a B. Marlin Business Services Corp. is a nationwide provider of equipment leasing solutions primarily to small businesses. For more information, get Portfolio Grader’s complete analysis of MRLN stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.