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.

News Market Reaction – DOCN

-0.55%

13 alerts

-0.55% Session close to close

-9.2% Trough in 8 hr 23 min

$8.86B Market Cap

0.3x Rel. Volume

In the Apr 7 session, DOCN declined 0.55%, reflecting a mild negative market reaction. Argus tracked a trough of -9.2% from its starting point during tracking. Our momentum scanner triggered 13 alerts that day, indicating notable trading interest and price volatility.

Data tracked by StockTitan Argus on the day of publication.

Market Context

This announcement details DigitalOcean’s move from the S&P SmallCap 600 to the S&P MidCap 400 as Cas...

Analysis

This announcement details DigitalOcean’s move from the S&P SmallCap 600 to the S&P MidCap 400 as Casey’s General Stores joins the S&P 500. The change reflects index rebalancing rather than a new corporate initiative. Contextually, the company recently executed sizable common stock offerings under an effective S-3ASR shelf and pursued AI-focused growth, including acquisitions and customer wins. Investors may watch how index inclusion interacts with prior dilution and ongoing AI execution in future disclosures.

Key Figures

Shares in upsized offering: 10,389,611 shares Aggregate proceeds: $800,000,047 Net proceeds: $773,000,045.41 +5 more

8 metrics

Shares in upsized offering 10,389,611 shares Underwritten common stock offering (pricing announcement, Mar 25, 2026)

Aggregate proceeds $800,000,047 Public offering proceeds to the public per 424B5 (Mar 25, 2026)

Net proceeds $773,000,045.41 Estimated net proceeds before expenses, 424B5 (Mar 25, 2026)

Underwriter option shares 1,558,441 shares 30-day underwriter option in equity offering

Proposed offering size $700,000,000 Proposed common stock offering (Mar 24, 2026)

Underwriter option amount $105,000,000 Additional shares underwriter option (proposed offering, Mar 24, 2026)

Expected shares outstanding 102,337,225 shares Post-offering share count expectation in 424B5 (Mar 25, 2026)

Shares outstanding 91,947,614 shares Issued and outstanding as of Dec 31, 2025 (424B5/S-3)

Historical Context

5 past events · Latest: Apr 13 (Positive)

Pattern 5 events

Date	Event	Sentiment	24h Move	Catalyst
Apr 13	Conference participation	Positive	+5.7%	CEO scheduled for fireside chat at Citi’s AI Summit with webcast replay.
Apr 02	AI acquisition	Positive	+2.7%	Acquisition of Katanemo Labs to enhance Agentic Inference Cloud and AI agents.
Mar 25	Equity offering pricing	Negative	+2.5%	Priced upsized offering of 10,389,611 shares for about $800M gross proceeds.
Mar 24	Equity offering plan	Negative	+2.5%	Proposed $700M common stock offering with additional $105M underwriter option.
Mar 03	AI customer win	Positive	-4.9%	Workato moved production AI workloads to DigitalOcean’s Agentic Inference Cloud.

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

Pattern Detected

Recent news shows mixed alignment: positive AI and acquisition headlines often aligned with gains, while equity offerings and some AI wins saw price reactions that diverged from the seemingly dilutive or positive tone.

Recent Company History

Over the last six weeks, DigitalOcean announced AI partnerships, an acquisition, and a sizeable equity raise. The company highlighted AI use cases like Workato’s deployment and acquired Katanemo Labs to bolster its Agentic Inference Cloud. It also executed an upsized common stock offering with related 8‑K and 424B5 filings. Price reactions have varied, sometimes rising on potentially dilutive offerings and occasionally falling after positive AI news, indicating inconsistent trading responses to both growth and financing announcements.

Key Terms

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

4 terms

s&p 500 financial

"Apr 9, 2026 | S&P 500 | Addition | Casey's General Stores | CASY | Consumer Staples"

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

"Apr 9, 2026 | S&P MidCap 400 | Addition | DigitalOcean Holdings | DOCN | Information Technology"

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

"Apr 9, 2026 | S&P SmallCap 600 | Addition | Broadstone Net Lease | BNL | Real Estate"

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.