For us Normies: what big funds bought last quarter, and why it is old news
Large US fund managers have to show their stock holdings every quarter. Here is how to read those reports, how we turn them into adds and cuts, and what the latest quarter shows.
What a 13F actually is
A 13F is the quarterly holdings report that large US investment managers must file. The rule covers managers with more than $100 million in certain stocks, and they file every quarter.
Think of it as a photo of a fund's stock shelf, taken on the last day of the quarter. You can see what was on the shelf at that moment, but not what was added or taken off after the photo was taken.
Why it matters, and where it stops
A 13F lets investors see where some of the largest pools of money have been putting their stock bets. Looking at one fund's trade on its own tells you little, because a single trade can have many reasons. When several respected funds move the same way, that is a stronger signal.
There are also clear limits. Filings are due up to 45 days after the quarter ends, so they show what funds held weeks ago, not today. They also show long stock positions only, and most short positions (bets that a price will fall) are not included. So you are seeing part of the picture, and an older version of it.
How to read one
Start with size. Conviction means how big a bet is compared with the whole portfolio. A position's size relative to the fund's whole portfolio shows how much conviction sits behind it. A small stake in a huge fund can be a footnote, while a large slice of a smaller fund says much more.
Next, look at the share count, which is the number of shares held, as opposed to their dollar value. Dollar values change every time the price moves, so the share count is what tells you whether a fund actually bought or sold.
Last, look for agreement. Several respected funds moving the same way carries more weight than any single trade.
How TradeStory AI reads the filings
TradeStory AI tracks a set of managers and compares each quarter's filing with the one before. We then sort the changes into a few plain labels.
A new large position is a new stake worth at least 3% of the fund's portfolio. A large add means the fund grew its share count by at least 50% and the stake is at least 1% of its portfolio. A cluster means at least 3 funds opened stakes of 1% of their portfolio or more in the same quarter.
On the selling side, a cut means a fund trimmed its share count by at least 50%, and a drop means it sold the position entirely. Because we count shares, not dollars, a stake that only rose in value is never mistaken for buying.
Today in our data
Our latest read covers the 2026-Q2 filings, compared with 2026-Q1. Across the tracked funds, 138 tracked names were held, out of 169 tracked names covered. Net money moved came to +63.0 B USD, with 160 new positions and 74 exits.
The largest net addition was $INIO, the ticker for INNIO, at +13.4 B USD. Funds behind it include BROOKFIELD Corp /ON/, Advent International, L.P. and Aventail Capital Group, LP. Our data flags INNIO as newly listed, and the move is not marked as a mark-to-market change, meaning it is not just a price rise.
Second came MU, the ticker for Micron Technology, at +11.4 B USD. Funds named here include Alphinity Investment Management Pty Ltd, AMF Tjanstepension AB and Baltimore-Washington Financial Advisors, Inc. This change is also not flagged as mark-to-market. Third was SNDK, the ticker for SanDisk, at +5.4 B USD.
The chart below shows the biggest adds and cuts for 2026-Q2 across the tracked funds, with price-only moves left out. Look at the shape: tall bars on the add side and much shorter bars on the cut side, which matches the positive net figure above. Keep the date in mind too, since these filings show holdings from weeks ago, not today.
Putting it together
Fund flows are one lens among several, next to the economy, company fundamentals and price charts. A 13F tells you where large money was positioned, but not what it is doing now or why it moved.
That is why we lean on share counts, portfolio weight and agreement across funds, and treat any single filing as one input rather than an answer.
Common beginner mistakes
- Treating a 13F as today's portfolio, when the positions may already have changed.
- Copying one famous fund's single trade without knowing its reason or time horizon.
- Reading a rising dollar value as buying when the share count did not change.
When you look at a fund's 13F, which do you check first: the share count, the position's size, or how many other funds made the same move?
Answer on XWhere this comes from
Based on the For us Normies library.
For information only. Not investment advice.
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