If you are looking do boost your dividend portfolio, some stocks might be better bets than others -- not only to secure distributions now but to have the chance at even more later.

Reality Shares Advisors, a San Diego-based asset management firm that specializes in dividends and isolated dividend growth strategies, has created DIVCON, a dividend health rating system that assesses the likelihood that companies will grow or cut their dividends. Like the U.S. Armed Forces' DEFCON system, DIVCON utilizes a five-tier rating system to provide a snapshot of companies' dividend health. A DIVCON 5 rating indicates the highest probability for a dividend increase, while a DIVCON 1 rating indicates the highest probability for a cut.

To decipher ratings, Reality Shares uses a weighted average of seven factors measuring the relationship between historic dividend trends, cash flow and earnings, buybacks, consensus forecasts and external financial ratings.

Thus far, DIVCON ratings have proven quite accurate, especially on the dividend boost side. According to Kian Salehizadeh, a senior analyst at Reality Shares, across the firm's three DIVCON indices historically (from 2001 through 2015), dividend growers rated at levels five and four have increased their payouts 95% of the time within 12 months of receiving that rating.

DIVCON updates its ratings each quarter to identify which stocks score the highest among the largest-cap publicly-traded companies. Looking for dividend increases? These are the companies that you're most likely to find them in over the next 12 months, according to DIVCON's ratings as per March 31.

1. AmerisourceBergen 

According to the DIVCON rating system, AmerisourceBergen  (ABC - Get Report) is the S&P company that is most likely to up its payout over the next year. The stock currently boasts a 34-cent-per-share quarterly dividend, which it increased in late 2015. It has a 1.5% dividend yield.

AmerisourceBergen sources and distributes pharmaceutical products to health care providers, pharmaceutical and biotech manufacturers, and specialty drug patients in the U.S. and internationally. It has an $18.1 billion market cap and a P/E of 52.70.

Of 10 analysts covering the stock, one rates it as a strong buy, one as a moderate buy and eight as a hold. TheStreet Ratings gives it a B.

2. Expeditors International of Washington

Expeditors International of Washington  (EXPD - Get Report) distributes a dividend of 36 cents per share semi-annually and has a 1.5% dividend yield. It last increased its distribution in 2015.

Expeditors International of Washington Inc. provides logistics services. It has a $9 billion market cap and trades at a P/E of 20.5.

Of 12 analysts covering the stock, five rate it as a strong buy, six as a hold and one as a strong sell. TheStreet ratings gives it an A-.

3. Cintas 

With a $1.05 annual dividend, Cintas  (CTAS - Get Report) boasts a 1.2% dividend yield and according to DIVCON is likely to increase its payout within the next year.

Cintas provides corporate identity uniforms and related business services primarily in North America, Latin America, Europe and Asia. It has a $9.6 billion market cap and trades at a P/E of 15.30.

Of 13 analysts covering the stock, three rate it as a strong buy, eight as a hold, one a moderate sell and one a strong sell. TheStreet ratings gives it a grade of A.

4. Stryker 

Stryker  (SYK - Get Report) makes a quarterly distribution of 38 cents per share, giving it a yield of 1.4%. It last increased its payout in late 2015.

Stryker, together with its subsidiaries, operates as a medical technology company. It operates through three segments: Orthopedics, MedSurg, and Neurotechnology and Spine. It has a $41 billion market cap and trades at a P/E of 29.1.

Of 21 analysts covering the stock, 12 rate it as a strong buy, one a moderate buy, six a hold and two a strong sell. TheStreet Ratings gives it a grade of A.

5. XL Group 

XL Group  (XL) boasts a 20-cent-per-share quarterly dividend and 2.2% yield. It increased its distribution from 16 cents last year.

XL Group plc, through its subsidiaries, operates as an insurance and reinsurance company. The company provides property, casualty and specialty products to industrial, commercial, professional, and insurance companies, as well as other enterprises worldwide. It has a $10.6 billion market cap and trades at a P/E of 8.8.

Of 10 analysts covering the stock, five rate it as a strong buy, two a moderate buy, two a hold and one a strong sell. TheStreet Ratings gives it a B.

6. Robert Half International 

Robert Half International  (RHI - Get Report) upped its quarterly dividend to 22 cents per share in early 2016 from 20 cents per share previously. It has a 1.9% yield.

Robert Half International provides staffing and risk consulting services in North America, South America, Europe, Asia and Australia. It has a market cap of $6 billion and trades at a P/E of 16.8.

Of 12 analysts covering the stock, six rate it as a strong buy, one a moderate buy, four a hold and one a strong sell. TheStreet Ratings gives it a B-.

7. Sherwin-Williams 

Sherwin-Williams  (SHW - Get Report) upped its quarterly dividend to 84 cents during the first quarter of this year from 67 cents, and according to DIVCON, it is poised for another hike at some time within the next 12 months. It has a dividend yield of 1.1%.

Sherwin Williams develops, manufactures, distributes and sells paints, coatings and related products to professional, industrial, commercial and retail customers primarily in North and South America, the Caribbean, Europe and Asia. It has a $27.4 billion market cap and trades at a P/E of 26.60.

Of 13 analysts covering the stock, six rate it as a strong buy, three a moderate buy and four a hold. TheStreet Ratings gives it a grade of A-.

8. Nike

Nike (NKE - Get Report) boasts a 16-cent quarterly dividend and 1.1% yield. It approved a dividend hike late last year, as well as a new $12 billion share repurchase program and 2-for-1 stock split.

The Beaverton, Ore.-based company together with its subsidiaries, designs, develops, markets and sells athletic footwear, apparel, equipment and accessories for men, women and kids worldwide. It has a $100.2 billion market cap and trades at a P/E of 27.60.

Of 25 analysts covering Nike, 19 rate it as a strong buy, one a moderate buy, four a hold and one a strong sell. TheStreet Ratings gives the stock a grade of A-.

9. Unum Group

Unum Group (UNM - Get Report) distributes an 18.5-cent dividend quarterly, giving it a 2.3% yield.

Together with its subsidiaries, Unum Group provides group and individual disability insurance products and services primarily in the U.S. and the U.K. The company operates through three segments: Unum U.S., Unum U.K. and Colonial Life. It has a $7.7 billion market cap and trades at a P/E of 9.20.

Of 11 analysts covering the stock, three rate it as a strong buy, two a moderate buy and six a hold. TheStreet Ratings gives it a B-.

10. TJX

TJX  (TJX - Get Report) in March announced plans to up its dividend to 26 cents per share, and according to DIVCON's rating system, it may be increasing its payout again sometime soon. The stock has a 1.3% yield.

TJX operates as an off-price apparel and home fashions retailer in the U.S. and internationally. It operates through four segments: Marmaxx, HomeGoods, TJX Canada and TJX International. It has a $51.2 billion market cap and trades at a P/E of 23.20.

Of 17 analysts covering the stock, 13 rate it as a strong buy, one as a moderate buy and four as a hold. TheStreet Ratings gives it a grade of A+.