US-EU Index Rebalances / Quantitative Researcher

Dimitris Ioannidis

Global Financial Data and Analytics Platform

ORTEX

ORTEX is a global financial data and analytics platform providing real-time securities lending and short interest data, index rebalance data, holdings and insider transactions, trading signals, corporate actions and news,  stock machine learning and factor scores and other analytics. The majority of the data are downloadable and accessible through APIs.

Index Rebalance

<ul>
<li>The acquisition of <a href="https://www.smartkarma.com/entities/ansys-inc" target="_blank" data-smartkarma-citation="entities:15473:1" rel="noopener">Ansys Inc (ANSS US)</a> by <a href="https://www.smartkarma.com/entities/synopsys-inc" target="_blank" data-smartkarma-citation="entities:3493:1" rel="noopener">Synopsys Inc (SNPS US)</a> has been completed today, 17 July and Ansys is expected to be deleted from Nasdaq100.</li>
<li>
<a href="https://www.smartkarma.com/entities/coreweave-inc" target="_blank" data-smartkarma-citation="entities:44471:1" rel="noopener">CoreWeave (CRWV US)</a> is forecasted to be added to Nasdaq100 as the replacement because it is the highest ranked eligible non-constituent following its recent listing on 28 March 2025.</li>
<li>Top addition candidate for the December 2025 annual review is now <a href="https://www.smartkarma.com/entities/kimberly-clark-corp" target="_blank" data-smartkarma-citation="entities:2292:1" rel="noopener">Kimberly Clark (KMB US)</a> following its listing transfer from NYSE to Nasdaq on 30 May 2025.</li>
</ul>


The acquisition of Ansys Inc (ANSS US) by Synopsys Inc (SNPS US) has been completed today, 17 July and Ansys is expected to be deleted from Nasdaq100.

CoreWeave (CRWV US) is forecasted to be added to Nasdaq100 as the replacement because it is the highest ranked eligible non-constituent following its recent listing on 28 March 2025.
Top addition candidate for the December 2025 annual review is now Kimberly Clark (KMB US) following its listing transfer from NYSE to Nasdaq on 30 May 2025.


CoreWeave (CRWV US): Forecasted Addition to Nasdaq100 Replacing Ansys Post-Acquisition

US-EU Index & Corporate Actions Analyst, ORTEX

Harry Kalfas

US-EU Index & Corporate Actions Analyst

<ul>
<li>The merger between <a href="https://www.smartkarma.com/entities/synopsys-inc" target="_blank" data-smartkarma-citation="entities:3493:1" rel="noopener">Synopsys Inc (SNPS US)</a> and <a href="https://www.smartkarma.com/entities/ansys-inc" target="_blank" data-smartkarma-citation="entities:15473:1" rel="noopener">Ansys Inc (ANSS US)</a> marks a major industry milestone, having overcome extended regulatory hurdles, including a delayed approval from Chinese authorities.</li>
<li>
<a href="https://www.smartkarma.com/entities/ansys-inc" target="_blank" data-smartkarma-citation="entities:15473:1" rel="noopener">Ansys Inc (ANSS US)</a> shareholders will receive $197 cash plus 0.3450 <a href="https://www.smartkarma.com/entities/synopsys-inc" target="_blank" data-smartkarma-citation="entities:3493:1" rel="noopener">Synopsys Inc (SNPS US)</a> shares per <a href="https://www.smartkarma.com/entities/ansys-inc" target="_blank" data-smartkarma-citation="entities:15473:1" rel="noopener">Ansys Inc (ANSS US)</a> share, valuing the deal at about $35 billion.</li>
<li>The merger is expected to significantly impact major U.S. indexes, triggering intra-quarter replacements and substantial passive fund flows.</li>
</ul>


The merger between Synopsys Inc (SNPS US) and Ansys Inc (ANSS US) marks a major industry milestone, having overcome extended regulatory hurdles, including a delayed approval from Chinese authorities.

Ansys Inc (ANSS US) shareholders will receive $197 cash plus 0.3450 Synopsys Inc (SNPS US) shares per Ansys Inc (ANSS US) share, valuing the deal at about $35 billion.
The merger is expected to significantly impact major U.S. indexes, triggering intra-quarter replacements and substantial passive fund flows.


Synopsys’ $35 Billion Acquisition of Ansys Closing: Major Index Changes Triggered

Pan-Asia Catalysts/Events, Quiddity Advisors

Travis Lundy

Pan-Asia Catalysts/Events

Quiddity Advisors

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. There are also multiple 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. There are also multiple live M&amp;A events which are likely to trigger intra-review index changes.


[Quiddity Index] S&P500/600 Sep25 Rebal: Multiple Intra-Review Changes Possible

<ul>
<li>
<a href="https://www.smartkarma.com/entities/interactive-brokers-group-inc" target="_blank" data-smartkarma-citation="entities:13335:1" rel="noopener">Interactive Brokers (IBKR US),</a><a href="https://www.smartkarma.com/entities/duolingo-inc" target="_blank" data-smartkarma-citation="entities:33531:1" rel="noopener">Duolingo (DUOL US)</a> and <a href="https://www.smartkarma.com/entities/emcor-group-inc" target="_blank" data-smartkarma-citation="entities:20703:1" rel="noopener">EMCOR (EME US)</a> are the main candidates for addition at review to replace <a href="https://www.smartkarma.com/entities/enphase-energy-inc" target="_blank" data-smartkarma-citation="entities:8872:1" rel="noopener">Enphase Energy (ENPH US)</a> and <a href="https://www.smartkarma.com/entities/caesars-entertainment-corp" target="_blank" data-smartkarma-citation="entities:15532:1" rel="noopener">Caesars Entertainment (CZR US)</a>. </li>
<li>
<a href="https://www.smartkarma.com/entities/cheniere-energy-inc" target="_blank" data-smartkarma-citation="entities:16683:1" rel="noopener">Cheniere Energy (LNG US)</a> and <a href="https://www.smartkarma.com/entities/applovin-corp" target="_blank" data-smartkarma-citation="entities:32989:1" rel="noopener">AppLovin (APP US)</a> are the main candidates for the replacement of the acquisition of <a href="https://www.smartkarma.com/entities/ansys-inc" target="_blank" data-smartkarma-citation="entities:15473:1" rel="noopener">Ansys (ANSS US)</a> which is anticipated end of June.</li>
<li>There is a possibility of zero S&amp;P500 changes at the review due to candidates scoring low in market cap and sector balance.</li>
</ul>



Interactive Brokers (IBKR US),Duolingo (DUOL US) and EMCOR (EME US) are the main candidates for addition at review to replace Enphase Energy (ENPH US) and Caesars Entertainment (CZR US). 

Cheniere Energy (LNG US) and AppLovin (APP US) are the main candidates for the replacement of the acquisition of Ansys (ANSS US) which is anticipated end of June.
There is a possibility of zero S&amp;P500 changes at the review due to candidates scoring low in market cap and sector balance.


S&P500 June 2025 Review Forecast: Weak but Interactive, Time for Duolingo?

<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 June 2025 index rebal event.</li>
<li>We expect two regular changes in June 2025. There are also multiple live spin-off and M&amp;A events which may trigger intra-review index changes near-term. Check the Leaderboards for those.</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 June 2025 index rebal event.
We expect two regular changes in June 2025. There are also multiple live spin-off and M&amp;A events which may trigger intra-review index changes near-term. Check the Leaderboards for those.


[Quiddity Index May25] S&P500/600 Jun25 Rebal: Lots of Intraview Changes Still Possible

United States

ANSYS, Inc. develops, markets, and supports software solutions for design analysis and optimization.  The Company's software accelerates product time to market, reduces production costs, improves engineering processes, and optimizes product quality and safety for a variety of manufactured products.  ANSYS's product family features open, flexible architecture for easy integration.

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Ansys Inc (ANSS US)

CoreWeave (CRWV US): Forecasted Addition to Nasdaq100 Replacing Ansys Post-Acquisition

Thomson Reuters (TRI) will replace ANSS instead. Reuters was considered to be in the category of financial data providers - alongside FactSet and...

Dimitris Ioannidis

Synopsys’ $35 Billion Acquisition of Ansys Closing: Major Index Changes Triggered

Synopsys’ $35B Ansys deal closes after regulatory delays, reshaping major U.S. indexes with key stock replacements and significant passive fund...

Harry Kalfas

[Quiddity Index] S&P500/600 Sep25 Rebal: Multiple Intra-Review Changes Possible

There are a number of intra-review events (before the Sep rebal) which will likely prompt changes, possibly shrinking the existing pool of likely...

Travis Lundy

S&P500 June 2025 Review Forecast: Weak but Interactive, Time for Duolingo?

No index changes materialized, and the candidates are weak indeed. Nonetheless, I still expected eligible midcap constituents to replace CZR and/or...

Dimitris Ioannidis

[Quiddity Index May25] S&P500/600 Jun25 Rebal: Lots of Intraview Changes Still Possible

The S&P500 has a couple of possible changes at the regular rebalance and more intra-review changes after. That means S&P600 DELs. We like those...

Travis Lundy

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