Casey's General Stores Set to Join S&P 500; DigitalOcean Holdings to Join S&P MidCap 400; Broadstone Net Lease to Join S&P SmallCap 600

Rhea-AI Summary

Broadstone Net Lease (NYSE: BNL) will be added to the S&P SmallCap 600 effective prior to the opening of trading on April 9, 2026, replacing DigitalOcean Holdings (DOCN). The change is part of concurrent index rebalances that move Casey's General Stores (CASY) into the S&P 500 and DOCN into the S&P MidCap 400.

The table of changes lists each addition and deletion by index and sector on the effective date.

Positive

• BNL added to S&P SmallCap 600 effective Apr 9, 2026
• Index membership change is explicitly scheduled and replaces DOCN in SmallCap 600 on Apr 9, 2026

Negative

• None.

Market Context

This announcement details Hologic’s removal from the S&P 500 as its sale to Blackstone and TPG compl...

Analysis

This announcement details Hologic’s removal from the S&P 500 as its sale to Blackstone and TPG completes, consistent with earlier merger and CEO‑transition disclosures. Each share converts into $76.00 in cash plus a contingent value right of up to $3.00. Recent history includes stable operating results and an FDA approval, but the equity story now centers on closing mechanics, index changes, and final settlement of cash and CVR consideration.

Key Figures

Merger cash consideration: $76.00 per share CVR potential: Up to $3.00 per share Shares disposed (Schnittker): 17,644 shares +5 more

8 metrics

Merger cash consideration $76.00 per share Cash paid per HOLX share in Hopper Parent merger

CVR potential Up to $3.00 per share Contingent value right in addition to cash per share

Shares disposed (Schnittker) 17,644 shares HOLX common stock disposed to issuer at merger

Shares disposed (Schneiders) 41,462 shares HOLX common stock surrendered at merger effective time

Shares disposed (Oberton) 150,735 shares HOLX common stock cashed out in merger

Performance stock units (Oberton) 42,707 units Performance stock units certified then cancelled for merger consideration

Exercise price range $45.61–$79.39 Exercise prices of options cancelled for merger consideration

Shares disposed (Horvath) 23,026 shares HOLX common stock disposed back to issuer at merger closing

Historical Context

5 past events · Latest: Apr 06 (Positive)

Pattern 5 events

Date	Event	Sentiment	24h Move	Catalyst
Apr 06	CEO retirement & merger	Positive	+0.5%	CEO retirement timed with closing of go-private transaction with Blackstone and TPG.
Mar 17	Health index report	Neutral	-0.1%	Release of Global Women’s Health Index highlighting persistent global screening gaps.
Feb 04	FDA approval	Positive	-0.1%	FDA approval of Aptima HPV mRNA-based assay for primary screening indications.
Jan 29	Earnings release	Neutral	-0.1%	Q1 FY2026 results with slight revenue growth and mixed GAAP vs non-GAAP EPS trends.
Jan 15	Earnings date set	Neutral	-0.1%	Announcement of Q1 FY2026 earnings date with no guidance due to pending acquisition.

24h Move is the share-price change in the day after each event; other market factors may also have contributed.

Pattern Detected

Recent news has been dominated by the pending merger and operational milestones, with at least one positive regulatory event (FDA approval) showing a mildly negative next-day move.

Recent Company History

Over the last few months, Hologic has moved from announcing its pending acquisition by Blackstone and TPG to closing the go‑private transaction, with CEO retirement timed to the deal around April 7, 2026. Alongside this, the company reported mixed but generally steady Q1 FY2026 results and secured FDA approval for its Aptima HPV assay, expanding its diagnostic portfolio. The current S&P 500 deletion reflects the completed merger, following these strategic and regulatory milestones.

Key Terms

s&p 500, s&p midcap 400, s&p smallcap 600, gics sector

4 terms

s&p 500 financial

"Casey's General Stores Inc. (NASD: CASY) will replace Hologic Inc. (NASD: HOLX) in the S&P 500,"

The S&P 500 is a broad stock market index that tracks the performance of 500 large U.S. companies, weighted so bigger firms have a larger impact. Investors use it like a thermometer or benchmark to judge how the overall U.S. stock market or a portfolio is doing; movements in the index influence investor sentiment, fund performance, and many passive investment products that aim to match its returns.

View in glossary

s&p midcap 400 financial

"S&P SmallCap 600 constituent DigitalOcean Holdings Inc. (NYSE: DOCN) will replace Casey's General Stores in the S&P MidCap 400,"

The S&P MidCap 400 is a group of 400 companies that are smaller than the big, well-known corporations but larger than tiny startups. It helps investors see how medium-sized companies are performing in the stock market, acting like a barometer for this middle-sized group of businesses.

s&p smallcap 600 financial

"Broadstone Net Lease Inc. (NYSE: BNL) will replace DigitalOcean Holdings in the S&P SmallCap 600 effective prior"

A stock market index made up of 600 small-cap U.S. companies chosen to represent the performance of smaller publicly traded firms. It matters to investors because it acts like a temperature gauge for the small-company segment of the market, serving as a benchmark for fund managers, a basis for index funds and ETFs, and a way to compare returns and risk when building a diversified portfolio.

gics sector financial

"Effective Date | Index Name | Action | Company Name | Ticker | GICS Sector"

GICS sector is one of the major industry groupings from the Global Industry Classification Standard, a system that sorts companies into consistent categories (like Technology or Health Care) based on the primary business they do. Investors use these sectors like folders in a filing cabinet to compare companies, build diversified portfolios, and track how whole parts of the market are performing rather than focusing on single stocks.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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NEW YORK, April 6, 2026 /PRNewswire/ -- S&P MidCap 400 constituent Casey's General Stores Inc. (NASD: CASY) will replace Hologic Inc. (NASD: HOLX) in the S&P 500, S&P SmallCap 600 constituent DigitalOcean Holdings Inc. (NYSE: DOCN) will replace Casey's General Stores in the S&P MidCap 400, and Broadstone Net Lease Inc. (NYSE: BNL) will replace DigitalOcean Holdings in the S&P SmallCap 600 effective prior to the opening of trading on Thursday, April 9. Affiliates of Blackstone Inc. and TPG Global are acquiring Hologic in a deal expected to be completed on or about April 7.

Following is a summary of the changes that will take place prior to the open of trading on the effective date:

Effective Date	Index Name	Action	Company Name	Ticker	GICS Sector
Apr 9, 2026	S&P 500	Addition	Casey's General Stores	CASY	Consumer Staples
Apr 9, 2026	S&P 500	Deletion	Hologic	HOLX	Health Care
Apr 9, 2026	S&P MidCap 400	Addition	DigitalOcean Holdings	DOCN	Information Technology
Apr 9, 2026	S&P MidCap 400	Deletion	Casey's General Stores	CASY	Consumer Staples
Apr 9, 2026	S&P SmallCap 600	Addition	Broadstone Net Lease	BNL	Real Estate
Apr 9, 2026	S&P SmallCap 600	Deletion	DigitalOcean Holdings	DOCN	Information Technology

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View original content:https://www.prnewswire.com/news-releases/caseys-general-stores-set-to-join-sp-500-digitalocean-holdings-to-join-sp-midcap-400-broadstone-net-lease-to-join-sp-smallcap-600-302735034.html

SOURCE S&P Dow Jones Indices

FAQ

When will Broadstone Net Lease (BNL) join the S&P SmallCap 600?

BNL will join the S&P SmallCap 600 prior to the opening of trading on April 9, 2026. According to S&P Dow Jones Indices, the change is part of a coordinated rebalance affecting multiple indices that day.

What index change causes BNL to be added to S&P SmallCap 600 on April 9, 2026?

BNL is added to the S&P SmallCap 600 replacing DigitalOcean Holdings (DOCN) on April 9, 2026. According to S&P Dow Jones Indices, this follows concurrent moves of CASY and DOCN across other indices.

Will the S&P SmallCap 600 addition for BNL be effective before market open April 9, 2026?

Yes, the BNL addition is effective prior to the opening of trading on April 9, 2026. According to S&P Dow Jones Indices, all listed changes occur before the market opens that day.

Which company does BNL replace in the S&P SmallCap 600 and what is the ticker?

Broadstone Net Lease replaces DigitalOcean Holdings (DOCN) in the S&P SmallCap 600 effective Apr 9, 2026. According to S&P Dow Jones Indices, DOCN moves out concurrent with other index adjustments.

How is the April 9, 2026 index reshuffle coordinated among CASY, DOCN, HOLX, and BNL?

The reshuffle moves CASY into the S&P 500, DOCN into the S&P MidCap 400, and BNL into the S&P SmallCap 600 on Apr 9, 2026. According to S&P Dow Jones Indices, these are simultaneous, scheduled index changes.

Where can investors verify the effective date and index actions for BNL (NYSE: BNL)?

Investors can verify the Apr 9, 2026 effective date and index actions through S&P Dow Jones Indices releases. According to S&P Dow Jones Indices, the table of additions and deletions lists each change and ticker.