Every quarter the S&P Dow Jones Indices group adjust or rebalance their indices.

For example the S&P/ASX 200 (Index: ^AXJO) (ASX: XJO) index ranks the top 200 companies by size. The companies included in the top 200 must also be highly liquid and tradable.

In my opinion, watching which companies are added to the S&P/ASX 300 (Index: ^AXKO) (ASX: XKO) is a good pastime. That’s because it can include the smaller, emerging, companies listed on the ASX that you may not always notice.

Also, many of the largest fund managers (think superannuation funds, multinational asset managers, etc.) are prohibited from investing in companies smaller than those included in the S&P/ASX 300 for obvious reasons.

Therefore, when companies are added to the index, they can be bought by more money managers and index funds – making a stronger market for the company’s shares.

10 companies added to the S&P/ASX 300

Here are 10 companies added to the S&P/ASX 300:

Ticker Company Market Cap Industry
1PG 1-Page Ltd (ASX: 1PG) $191 million Software
3PL 3P Learning Ltd (ASX: 3PL) $186 million Consumer Services
A2M a2 Milk Company Ltd (Australia) (ASX: A2M) NZD1.3 billion Food, Beverage & Tobacco
ACX Aconex Ltd (ASX: ACX) $844 million Software
AJX Alexium International Group Ltd (ASX: AJX) $194 million Materials
AMA AMA Group Ltd (ASX: AMA) $393 million Retail
AYS Amaysim Australia Ltd (ASX: AYS) $315 million Telecommunication
BLA Blue Sky Alternative Investments Ltd (ASX: BLA) $342 million Financials
BWX BWX Ltd (ASX: BWX) $367 million Household & personal Products
CKF Collins Foods Ltd (ASX: CKF) $419 million Consumer Services

Data sourced from Google Finance.

Foolish takeaway

If you were looking for 10 potential growth shares to add to your research list, these companies could be what you need. Perhaps unsurprisingly, many of the these companies are technology-related or have embraced technology as a big part of their business. Perhaps it’s a sign of things to come?

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Motley Fool Contributor Owen Raszkiewicz does not have a financial interest in any company mentioned. Owen welcomes -- and encourages -- your feedback on Google+, LinkedIn or you can follow him on Twitter @ASXinvest.

Unless otherwise noted, the author does not have a position in any stocks mentioned by the author in the comments below. The Motley Fool Australia has no position in any of the stocks mentioned. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Bruce Jackson.