Each business day, TheStreet.com Ratings compiles a list of the top five stocks in five categories -- fast-growth, all-around value, large-cap, mid-cap and small-cap -- and publishes these lists in the Ratings section of our Web site.

For investors who prefer the diversification offered by mutual funds to owning individual stocks, here are some of the biggest holders of the companies that were on our list as of Wednesday, Dec. 19.

Exelon

(EXC) - Get Report

:

(FSUTX) - Get Report

Fidelity Select Utilities Growth allocated 9.72% of its total portfolio as of Sept. 30, according to Thomson Financial. This was its largest single holding at the time.

(VUIAX) - Get Report

Vanguard Utilities Index allocated 8.82% of its total portfolio as of Sept. 30, according to Thomson Financial. This was its largest single holding at the time.

Air Products & Chemicals

(APD) - Get Report

:

(ACEHX) - Get Report

Van Kampen Exchange allocated about 9.35% of its total porfolio as of Sept. 30, according to Thomson Financial.

(FSCHX) - Get Report

Fidelity Select Chemicals allocated about 7.68% of its total portfolio as of Sept. 30, according to Thomson Financial.

FPL Group

(FPL) - Get Report

:

The

(COPLX) - Get Report

Copley Fund allocated about 7.60% of its total portfolio as of Aug. 31, according to Thomson Financial.

(CSUAX) - Get Report

Cohen & Steers Utility allocated about 4.20% of its total portfolio as of Sept. 30, according to Thomson Financial.

Praxair

(PX)

:

(LEXCX) - Get Report

ING Corporate Leaders allocated about 7.15% of its total portfolio as of Sept. 30, according to the company's Web site.

(WPFRX)

Westport Fund allocated about 6.52% of its total portfolio as of June 30, according to Thomson Financial.

Union Pacific

(UNP) - Get Report

:

(FSRFX) - Get Report

Fidelity Select Transportation allocated about 13.19% of its total portfolio as of Sept. 30, according to Thomson Financial. This was its largest single holding at the time.

(RYPIX) - Get Report

Rydex Transportation allocated about 6.46% of its total portfolio as of Sept. 30, according to Thomson Financial.

For a description of the top five large caps and an explanation of their ratings, click

here.