Barron's recently ran an interesting story on an activist hedge fund we follow called The Chilren's Investment Fund. The article interviewed founder Christopher Hohn, who unveiled some very interesting points and gave unparalleled insight into one of the most profound activist hedge funds in today's markets.

Hohn acts very similar to Warren Buffett in that he purchases hard-asset companies that are well-positioned and enjoy a near-monopoly, where there is a high barrier to entry, and which are under-researched and undervalued. The difference is that this investor likes to look for situations where poor management is undervaluing the firm.

The Children's Fund is well known for pushing management to pursue shareholder-friendly activities like share buybacks and special dividends designed to unlock value. Indeed, he has also seen great success by saving companies like Deutsche Borse from bad takeover attempts that undervalue the company.

Another important question answered in the interview was how such an innocent name - The Children's Fund - was assigned to such an aggressive hedge fund. It turns out that Hohn's wife wanted a fund that could help the poor, so this fund donates a portion of its profits to a non-profit organization that helps children in developing nations.

The rest of the interview can be read here.

But the big question is then: What stocks does the Chilren's Investment Fund own now? A quick look at their recent Schedule 13F-HR filing with the SEC shows a portfolio of just nine stocks - some popular and some unknown. The hedge fund's largest holding - not surprisingly - is in Union Pacific Corp., while CSX Corporation comes in second place. However, there are also many unknown names like Martin Marietta Matls on the list.

Here is the complete list:
1. Transalta Corporation (TAC)
2. Sterlite Inds India Ltd (SLT)
3. CSX Corporation (CSX)
4. CME Group, Inc. (CME)
5. Martin Marietta Matls Inc. (MLM)
6. Mastercard Inc. (MA)
7. Nymex Holdings Inc. (NMX)
8. Union Pacific Corp. (UNP)
9. Vulcan Materials Co. (VMC)