Back in May, in The False Boom, I mentioned a curious filing.

A young fund manager named Leopold Aschenbrenner, lately of Situational Awareness, who at the time was all-in on AI infrastructure, had bought roughly $8.5 billion in put positions across the semiconductor sector. He didn't announce it in a letter, or anywhere else for that matter. The government made him disclose it on a form most investors never read.

What exactly was that form, and how do you read one yourself, you ask?

You have perfect timing. Because this Friday at midnight, thousands of those forms hit the public record at once, covering the exact quarter when the Pentagon's $54.6 billion drone request landed. Before that happens, you will learn how to read Wall Street's mail.

What’s a 13F?

In 1975, after institutional money had grown from a sideshow into the whole circus, Congress decided the public deserved to see what the giants owned. The result is SEC Form 13F.

The rules are simple. Any investment manager running $100 million or more must file within 45 days of each quarter's end, listing its US-listed stock holdings as of the final day of that quarter.

June 30 was the last snapshot date. Add 45 days, and you get this Friday, August 14. That's why the filings flood in this week, and why the biggest funds file in the final hours. They're required to confess, but nothing says they must confess early.

Think of a 13F as a confession, forced 4x annually under pain of the full extent of the law. It’s one of the rare places in finance where you learn what the smart money did, rather than what it says.

Talk is cheap. Filings are sworn.

What the Confession Leaves Out

Now the part the whale-watching newsletters skip. A 13F omits as much as it reveals, and every omission is a trap for the amateur.

No short positions. A fund can hold a stock long on paper and be net short through instruments that never appear. You see one side of the trade.

No timing. The filing shows June 30 holdings only. A fund could have bought in April and sold in July. You're looking at a photograph, not a film.

No cash, no foreign listings, mostly no bonds. On the form, a manager who went 50% cash looks as if they did nothing.

It’s stale by design. By the time you read Friday's filings, the data is already 45 days old. Anyone mindlessly copying trades is buying where the whales were, not where they are.

And the subtlest one: options. Puts and calls show up in ways that can make a bearish bet look like a bullish holding, or vice versa. That $8.5 billion put position from May? An amateur scanning the same filing might have counted the fund's chip longs and called him a bull.

How the Pros Read 13Fs

If the form is stale, partial, and easy to misread, why should you bother? Because if you read it correctly, you’ll discover a gold mine.

Watch for clusters, not single positions. One famous fund buying a company is a headline. Five specialist funds buying the same mid-cap defense name in the same quarter is a signal. Belief clusters.

New positions beat old ones. A fund that has held a stock for years tells you about the past. A brand-new position, initiated the same quarter a $54 billion catalyst dropped, tells you about a decision.

Size equals conviction. A 0.2% starter position is a manager watching. A 4% position is a manager persuaded.

Follow the specialists. When a generalist megafund owns a defense prime, that's furniture. When funds that live and breathe aerospace and government contracts all lean the same way, they're trading on their expertise. That's dispersed knowledge showing up in public, and it may be the closest thing you'll get to reading the price system's diary.

Compare quarters. One filing is a snapshot. Four filings become a video about building positions or running for the exits.

Wrap Up

On Monday, we established that cheap drones broke the Pentagon's economics. Yesterday, we followed the $54.6 billion response and the side door it's moving through.

The budget request landed in April. The quarter ended June 30. Therefore, Friday's filings are the first full look at what professional money did in the months after DC signaled the largest proportional weapons-budget shift in modern history.

Did the specialists cluster into the autonomy names? Did they add to the primes, or rotate away from them? Did anyone hedge the whole story, the way our young (and perhaps former) AI manager hedged his?

By midnight Friday, it's all on the record.

Tomorrow, we’ll show you what the early filers and the prior quarters already reveal about how this trade was building before the announcement. Then on Friday morning, before the deadline-day flood, you'll get the field guide.

You may spend Friday night the way I will. Reading confessions.