Both RPX Corp and Acacia have seen hundreds of millions of dollars knocked off their market capitalisations since the last week in August. This comes at a time when overall the Nasdaq index, on which they are both quoted, has experienced a slight rise of just over 2%. And RPX and Acacia are not the only IP-based businesses to have seen falls over the same timeframe. Of the other three Nasdaq IP companies this blog follows – Rambus, InterDigital and Tessera – only the last one has made gains.

On the Toronto exchange, meanwhile, Mosaid, whose acquisition by a US private equity firm was recently announced, is up; while WiLan, which had been trying to acquire it, is down. Over in Europe, where publicly-quoted IP-based businesses are few and far between, Scottish patent and trademark attorney firm Murgitroyd has seen its stock price climb slightly.

I looked at the Friday closing prices of all the companies mentioned above and compared them with their closing prices on Friday 26th August. I also tracked the three month percentage rise and falls between 29th August and 25th November. This is what I found:

Select Nasdaq IP-based businesses

• Acacia closed this Friday with a share price of $28.76, giving it a market capitalisation of $1.23 billion. On 26th August it had closed at $40.23 per share. Between 29th August and 25th November the stock fell 28.51%.

• InterDigital closed at $40.70, with a market cap of $1.85 billion. On 26th August it closed on $69.06 per share. From 29th August to 25th November stock fell 41.07%.

• Rambus closed at $7.54, market cap $829.11; 26th August $11.18; stock fell 5.63%.

• RPX Corp closed at $14.56, market cap $686.09 million; 26th August $25.17; stock fell 42.15%.

• Tessera closed at $15.59, market cap $803.39; 26th August $13.77; stock rose 13.22%.

Select Toronto Stock Exchange IP-based businesses

• MOSAID closed at C$45.81, market cap C$545.97; 26th August C$39.94; stock rose 14.55%.

• WiLan closed at C$5.64, market cap C$695.41; 26th August C$6.90; stock fell 18.26%.

Select London AIM IP-based business

• Murgitroyd closed at £3.15, market cap £26.9 million; 25th August £3.05; stock rose 3.28%.

Sectors

IP business, IP finance, IP valuation