Research

See All

About Complete Investor

The Real Secret To Long-Term Wealth

By putting all of our investment recommendations and strategies into a single product, with complete do-it-for-you portfolios like Porter’s Permanent Portfolio, and adding a lively Roundtable discussion each month, this single membership is truly everything you need to be a complete investor.

Learn More

About Distressed Investing

The Secret To Investing In Distressed Debt

As the corporate debt bubble unwinds, we have partnered with legendary financial author and credit analyst Martin Fridson to take advantage of “the greatest legal transfer of wealth in history.” Martin releases monthly distressed debt and equity recommendations, for Partners only.

Learn More

About Biotechnology

A Once-In-A-Generation Moment For Tech Investors

We’re at a tipping point with emerging technology, witnessing changes that were unimaginable just years ago. Living in the San Francisco Bay Area — the tech capital of the world — Tech Frontiers senior analyst Erez Kalir has his finger on the pulse of advancements in artificial intelligence, blockchain, computing, and biosciences.

Learn More

About The Trading Club

Harnessing The Power of Non‑Correlated Return Streams

A trading service unlike anything we’ve ever done before. We funded a live account with $100,000 of our own money and execute behind our highest-conviction trading ideas. And you can follow along with every step of the way. Get access to trades built around the best independent research from our team.

Learn More

About Porter & Co. Best Buys

The New Porter & Co. Best Buys

Every month, we send you the three best investment ideas from across the Porter & Co. universe. and check in with all of our analysts to select three current recommendations that are at a very attractive buy price. These become our Best Buys.

Learn More

Hidden Beneath The Surface

Listen Now:

Premium feature available to paid subscribers.

Learn More About Becoming a Subscriber

Europe’s Most Important Small-Cap Maritime Defense Company

This is Porter & Co.'s Tech Frontiers – where analyst Erez Kalir tells the story of a little-known nautical-engineering firm that he believes is set to significantly rise in price. The details of that recommendation – and the specific name of the company – are for paid-up subscribers only. To learn more about subscribing to Tech Frontiers, click here.


In 1964, German naval engineer Ulrich Gabler published a book called Unterseebootsbau – Submarine Construction. For most readers, the title alone would have been enough to induce deep slumber. But Gabler was not writing for suspense lovers, airport bookstores, or the bestseller list. Instead, his audience was a tiny universe of naval architects and submarine engineers who cared deeply about matters most of us will never think about: hull geometry, drag, acoustic signature, periscope depth, ballast systems, pressure envelopes, and the strange physics of operating machines in the least forgiving environment on Earth.

To the people who mattered in his field, Gabler’s work was not obscure but foundational. The U.S. Navy seized on the book and had it translated and distributed to American defense engineers in the 1970s. Four decades later, in the 2000s, an updated English-language edition of the original, re-titled Submarine Design, ensured that Gabler’s work remained relevant. Today, MIT’s naval engineering program – one of the best in the world – still places Gabler’s work in its core curriculum, classifying it as one of three foundational submarine design traditions: one American (Jackson), one British (Burcher), and one German (Gabler).

image.png

Ulrich Gabler didn’t approach submarine design as an ivory-tower academic, but instead as a practitioner. Early in his career, during World War II, Gabler served as chief engineer of Germany’s storied U-boat submarine corps, immortalized in the 1981 classic film Das Boot. After the war, Gabler founded Ingenieurkontor Lübeck (“IKL”), an engineering firm that dominated German submarine design in the 1950s, and whose submarine design DNA still constitutes the heart of the ThyssenKrupp Marine Systems (“TKMS”) subs deployed by the navies of Germany, Israel, Norway, and Singapore.

Our recommendation this month traces directly back to that impressive lineage.


Subscribe to Erez Kalir’s Tech Frontiers to unlock the rest of this issue and more.

Become a Tech Frontiers subscriber today to get instant access to the rest of this issue and other valuable subscriber-only content.

A Tech Frontiers subscription gets you:

  1. Monthly Issues – a detailed analysis on a new recommendation plus ongoing updates on the existing list of recommendations.

  2. Special Reports – Covering the three biggest trends impacting investing and society as a whole: AI, biotech, and the blockchain. As these “tsunamis” collide, Erez believes we’ll see exponential breakthroughs that could make fortunes for early investors.

  3. Buy / Sell Alerts – instant notifications when any recommended stock makes a major move worthy of your attention.

  4. And more…

Use this link today and lock in our lowest rate --> 60% off the usual annual rate.