About High Growth Investing
Highly relevant for any equity investor looking to successfully invest in growth and technology companies. "High Growth Investing" will help you build and preserve wealth over time. Written by software entrepreneur and professional money manager Stefan Waldhauser with 35 years of experience as a passionate stock picker.
“High Growth Investing” is your guide to understanding how to pick highly volatile technology and growth stocks. This newsletter explains a proven investment strategy and presents specific investment cases and executable insights into my portfolio management.
You won’t get any idea on how to get rich quick. It's meant to be an alternative for serious investors to the flashy, quick-profit schemes flooding the Substack platform.
What to expect
I send out a free newsletter once a week (usually Monday morning). It’s easy to digest and will take only a few minutes of your valuable time to learn more and more about tech and growth investing.
Who am I?
My name is Stefan Waldhauser and I have been investing in growth companies for more than 35 years. I studied business mathematics and computer science, then co-founded a software company in 2000. I sold it into Silicon Valley in 2013.
Then I turned my stock market hobby into a career and have been a full-time investor and asset manager in my own right ever since. As co-founder of an investment fund with up to €150 million in assets under management (and 5 Morningstar stars), I have also gained valuable experience in professional asset management.
I am also co-founder of aktien.guide, a leading analysis platform for stock pickers in the German-speaking world. After the huge success in this region with 3 Mio. users, the international version stocksguide.com is now also available. All my paying subscribers get FREE access to this comprehensive toolset!
How much does it cost?
My weekly newsletter and all my educational content is free.
I love to write. And I become an even better investor when I write about my investments and discuss the investment cases with the online community. After many years of doing this only in German, I felt it's time to make my content available in English.
I usually write one (sometimes two) article(s) per week about a particular investment case. This could be a brand-new investment idea, a broader investment story, or an update on one of my long-term investments.
Since August 2025 my investment ideas and the ongoing coverage of my investment cases are behind a paywall.
Please read on to find out why I decided to keep my most valuable pieces away from the public.
Paywall Instead of Pageview: The Runaway of Financial Bloggers into the Subscription Age
The question of whether artificial intelligence will “kill” blogging has been haunting the content scene since the advent of ChatGPT & Co. In hardly any other area do solo publishers - like myself - and small teams feel the disruption so directly: first the comments dwindled, then the reach in social media - and now, due to Google's new AI boxes, the or…
Subscribe to access to the free newsletter and website. Never miss an update on my educational topics, they are free. And please think about upgrading to a paid subscription, if you value my work and want to get the full value out of my own investment ideas and coverage.
As an added bonus, all paying subscribers will receive free access to StocksGuide.com, my preferred stock-picking platform. I developed this platform over the last couple of years as co-founder alongside the StocksGuide team.
Finding the Best Stocks Made Easy
Over the past few years, StocksGuide has become my most important stock-picking platform. You've probably never heard of StocksGuide, and with good reason, because it simply wasn't available outside the German-speaking world - until today.
Please see our Terms of Service. Any individual or entity that consumes my finance content in the course of business (e.g., banks, broker-dealers, asset-management or research firms) must subscribe at the Commercial-Member tier.
Expensing the Subscription
As a private investor, you may consider deducting the subscription cost from your taxes.
As a commercial subscriber you may consider to expense the subscription using your learning, professional development, or research budget.
If you are considering becoming a paying subscriber, please take a look at the pricing page on the website (rather than through the Substack app). The prices shown on the Substack app are much higher because of the fees we have to pay to Apple when you buy through their App Store.
Some of you have asked me about a special subscription price for students. I am delighted that so many young investors read my substack. And indeed, I realize that the regular subscription price does not fit into many student budgets. Hence my offer: if you send me proof of your enrollment via DM here on substack, I will send you a special link with an attractive discount on my paid subscription plan.
When you become a paying subscriber, you will receive a receipt immediately. You can generate receipts and invoices suitable for company accounting or for submission to your tax office/tax advisor on this page.
