Founder of Punch Card Management — a highly private value investor who runs a portfolio of just a handful of stocks.
Life story
Norbert Lou is from Windsor, Connecticut. He was a standout student: he won his school spelling bee at age 10, took advanced maths courses at the University of Hartford while still in high school, and graduated as valedictorian.
At Cornell he majored in agricultural and biological engineering while completing pre-med requirements. An internship at J.P. Morgan in his junior year sparked his interest in finance. Little is publicly known about his family.
How they got started
According to public sources, Lou started at Bridgewater Associates, later worked as an analyst at Brown Brothers Harriman and then at activist firm Elliott Management. He has said Elliott's hands-on approach "didn't really suit my nature" and that he prefers to sit back and watch a business compound.
He launched Punch Card on June 1, 2004. The name echoes a famous Buffett idea: if an investor had a card with only 20 punches for a lifetime of decisions, they would make each one very carefully.
Investment style
Lou typically holds only a few stocks. As of 2011 he had used minimal shorting, no leverage and kept average cash balances of about 25%. Turnover is very low — positions can stay unchanged for years.
Best decisions
The first seven years (2004–2011)
From June 2004 to September 2011 the fund returned about 14.5% a year net, versus about 2.2% a year for the S&P 500 over the same period.
Biggest mistakes
Limited public information
Lou rarely gives interviews and does not publish investor letters, so no reliable public information on his mistakes was found.
Today
According to its March 2024 Form ADV, Punch Card managed about $588 million for a single client. Lou still runs the fund; his age and personal life are not publicly known.
What to learn from following the portfolio
- The portfolio is tiny and rarely changes — a new position is an uncommon, meaningful signal.
- The 13F shows only long US stocks with a 45-day lag; the cash balance (sometimes large) is invisible.
- Copying a few-stock portfolio means heavy concentration risk — use it as a source of ideas.
- Halal lens: Lou's portfolio can include companies tied to insurance or finance (such as conglomerates) — their halal status is screened separately. Check each position's halal status in the Portfolio tab.
An introduction based on public sources — not investment advice. Spotted an error? Let us know.