Pan-Asia Catalysts/Events, Quiddity Advisors

Travis Lundy

Pan-Asia Catalysts/Events

Quiddity Advisors

Index Rebalance

Interactive Brokers Group, Inc / Index Rebalance

<ul>
<li>The S&amp;P 500 index tracks the 500 largest names listed in the US and it is one of the most highly-tracked indices in the world.</li>
<li>In this insight, we take a look at the upcoming constituent changes in the run up to the September 2025 index rebal event.</li>
<li>We expect two regular changes in September 2025 - maybe $10bn a side. There are also a couple of live M&amp;A events which are likely to trigger intra-review index changes.</li>
</ul>


The S&amp;P 500 index tracks the 500 largest names listed in the US and it is one of the most highly-tracked indices in the world.
In this insight, we take a look at the upcoming constituent changes in the run up to the September 2025 index rebal event.
We expect two regular changes in September 2025 - maybe $10bn a side. There are also a couple of live M&amp;A events which are likely to trigger intra-review index changes.


[Quiddity Index] S&P500/400/600 Sep25 Rebal: Two Possible Changes, But One Iffy

<ul>
<li>The S&amp;P 500 index tracks the 500 largest names listed in the US and it is one of the most highly-tracked indices in the world.</li>
<li>The rankings used for the September 2025 index rebal event will be based on yesterday's (3rd September 2025) opening prices. The announcement will be made after the close on Friday.</li>
<li>In this insight, we take a look at our final expectations for ADDs/DELs (along with a tracker of all live spinoff/M&amp;A events which affect the index the next two quarters).</li>
</ul>


The S&amp;P 500 index tracks the 500 largest names listed in the US and it is one of the most highly-tracked indices in the world.
The rankings used for the September 2025 index rebal event will be based on yesterday's (3rd September 2025) opening prices. The announcement will be made after the close on Friday.
In this insight, we take a look at our final expectations for ADDs/DELs (along with a tracker of all live spinoff/M&amp;A events which affect the index the next two quarters).


[Quiddity Index] S&P500/600 Sep25 Rebal: Final Predictions

United States

Mesa Laboratories, Inc. acquires, develops, manufactures, and markets electronic measurement instruments used by industrial and hemodialysis customers.  The Company's products include pipeline flow meters, instruments used for calibrating hemodialysis and proportioning equipment, temperature sensors, and data recorders.  Mesa is also exploring alternative uses of their technologies.

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Mesa Laboratories (MLAB US)

[Quiddity Index] S&P500/400/600 Sep25 Rebal: Two Possible Changes, But One Iffy

We expect IBKR and possibly APP to join the S&P500 in September. We expect two deletes. MSTR has moved to second place BUT it has issues which...

Travis Lundy

[Quiddity Index] S&P500/600 Sep25 Rebal: Final Predictions

The S&P500/400/600 Sep Rebal cutoff was decided at y/day's open. S&P500 predictions are like tilting at windmills, but we like windmills. We...

Travis Lundy

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