Healthcare Triangle (NASDAQ: HCTI) increases ATM program to $39.0M capacity

Rhea-AI Filing Summary

Healthcare Triangle, Inc. amends its at-the-market program to increase the amount available for sale to $39,000,000 of common stock under the Sales Agreement with Spartan Capital Securities, LLC. This supplement notes $6,522,300.16 of shares were previously sold under the ATM Agreement and that sales may be made on Nasdaq or otherwise in at-the-market transactions.

The Sales Agent will sell on a commercially reasonable efforts basis and is not required to sell any specific number or dollar amount. The last reported sale price on Nasdaq on March 30, 2026 was $2.71 per share.

Insights

Capital Markets Strategist

Increases ATM capacity to permit additional at-the-market sales up to $39.0M.

The filing expands the issuer's available at-the-market shelf to $39,000,000, with $6,522,300.16 previously sold under the same agreement. The Sales Agent may execute sales on Nasdaq, to market makers, or in negotiated transactions at prevailing prices.

Timing and pace of sales depend on the Sales Agent's commercially reasonable efforts; cash-flow treatment is proceeds to the issuer. Subsequent prospectus supplements or sales reports will disclose actual issuance amounts.

Key Figures

ATM capacity: $39,000,000 Previously sold under ATM: $6,522,300.16 Last reported sale price: $2.71

3 metrics

ATM capacity $39,000,000 Amendment increases amount available under the ATM Sales Agreement

Previously sold under ATM $6,522,300.16 Amount of shares previously sold pursuant to the ATM Agreement as of the supplement date

Last reported sale price $2.71 Last reported Nasdaq sale price on March 30, 2026

Key Terms

at-the-market, Sales Agreement, Sales Agent, Rule 415

4 terms

at-the-market financial

"sales may be made in transactions that are deemed to be “at-the-market” offerings"

"At-the-market" is a method for companies to sell new shares of stock directly into the open market over time, rather than all at once. It allows companies to raise money gradually, similar to selling slices of a pie instead of the entire pie at once, which can help manage the sale's impact on the stock price. This approach gives investors a steady supply of shares while providing companies with flexible funding options.

Sales Agreement regulatory

"pursuant to the terms of Sales Agreement, dated November 18, 2025"

A sales agreement is a written contract that sets out the terms for selling goods, services, or assets, specifying price, delivery, payment schedule and responsibilities of each side. For investors it matters because it creates a predictable stream of revenue or cash obligations, clarifies timing and risk, and can change a company’s value or forecasts much like a signed order turns a customer’s verbal intent into a firm commitment.

Sales Agent market

"Spartan Capital Securities, LLC (the “Sales Agent”), acting as sales agent or principal"

A sales agent is an individual or firm authorized to sell a company’s products or services on its behalf, typically paid by commission or fees rather than a fixed salary. For investors, who a company uses to reach customers and how well those agents perform affects revenue growth and profit margins — like hiring local independent sellers to expand into new neighborhoods without building stores — so agent quality and cost matter to future cash flow and valuation.

Rule 415 regulatory

"as defined in Rule 415 under the Securities Act of 1933"

Rule 415 is a U.S. Securities and Exchange Commission regulation that lets a company register securities ahead of time and then offer them for sale in pieces over an extended period under a “shelf” registration, so offerings can be launched quickly when market conditions suit the issuer. For investors, it signals that management has a ready way to raise capital fast—useful for seizing opportunities but potentially dilutive to existing shareholders, like a company pre-loading a credit line it can tap as needed.

Filed Pursuant to Rule 424(b)(5)

Registration No. 333-276382

PROSPECTUS SUPPLEMENT

(to Prospectus Supplement dated November 19, 2025 to Prospectus dated January 31, 2024)

HEALTHCARE TRIANGLE, INC.

Up to $39,000,000

Common Stock

This prospectus supplement (the “Prospectus Supplement”) amends and supplements the prospectus supplement dated November 19, 2025, and its accompanying base prospectus dated January 31, 2024 (collectively, the “ATM Prospectus”), relating to the offer and sale of shares of our common stock from time to time pursuant to the terms of  Sales Agreement, dated November 18, 2025 (the “ATM Sales Agreement”) with Spartan Capital Securities, LLC (the “Sales Agent”), acting as sales agent or principal. This Prospectus Supplement should be read in conjunction with the ATM Prospectus, and is qualified by reference thereto, except to the extent that the information herein amends or supersedes the information contained in the ATM Prospectus. This Prospectus Supplement is not complete without and may only be delivered or utilized in connection with the ATM Prospectus, and any future amendments or supplements thereto.

We are filing this Prospectus Supplement to amend the ATM Prospectus to increase the amount of shares we may offer and sell through the Sales Agent pursuant to the ATM Agreement to $39,000,000, which does not include the $6,522,300.16 of shares that were previously sold pursuant to the ATM Agreement as of the date of this Prospectus Supplement.

Sales of common stock, if any, under this Prospectus Supplement and the ATM Prospectus may be made in transactions that are deemed to be “at-the-market” offerings as defined in Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”), including sales made directly on or through Nasdaq Capital Market (“Nasdaq”), the existing trading market for our common stock, or any other existing trading market in the Unites States for our common stock, sales made to or through a market maker other than on an exchange or otherwise, directly to the Sales Agent as principal, in negotiated transactions at market prices prevailing at the time of sale or at prices related to such prevailing market prices, and/or in any other method permitted by law. The Sales Agent is not required to sell any specific number or dollar amount of shares, but will act as sales agent on a commercially reasonable efforts basis consistent with its normal trading and sales practices. There is no arrangement for funds to be received in any escrow, trust or similar arrangement.

Our common stock trades on the Nasdaq under the symbol “HCTI.” The last reported sale price of our common stock on Nasdaq on March 30, 2026, was $2.71 per share.

INVESTING IN OUR SECURITIES INVOLVES RISKS. SEE THE “RISK FACTORS” BEGINNING ON PAGE 7 OF THE ATM PROSPECTUS AND IN THE DOCUMENTS INCORPORATED BY REFERENCE IN THE REGISTRATION STATEMENT CONCERNING FACTORS YOU SHOULD CONSIDER BEFORE INVESTING IN OUR COMMON STOCK.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus supplement and the accompanying prospectus. Any representation to the contrary is a criminal offense.

Spartan Capital Securities, LLC

The date of this prospectus supplement is March 31, 2026.

FAQ

What does Healthcare Triangle’s (HCTI) prospectus supplement do?

It increases the ATM program capacity to $39,000,000, allowing additional common stock to be offered and sold under the Sales Agreement. The supplement amends the prior ATM Prospectus and works with the existing Sales Agreement.

How much has Healthcare Triangle already sold under the ATM before this supplement?

The prospectus supplement states $6,522,300.16 of shares were previously sold pursuant to the ATM Agreement as of the supplement date. Those prior sales are separate from the new $39,000,000 capacity.

Through what methods can HCTI sell shares under the amended ATM program?

Sales may be made at-the-market on or through Nasdaq, to market makers off-exchange, directly to the Sales Agent as principal, in negotiated transactions, or by other lawful methods permitted under Rule 415.

Who acts as the Sales Agent for Healthcare Triangle’s ATM program?

The Sales Agent named in the supplement is Spartan Capital Securities, LLC, which will act on a commercially reasonable efforts basis consistent with its normal trading and sales practices.

Will Healthcare Triangle definitely sell the full $39,000,000 under the ATM?

No. The Sales Agent is not required to sell any specific number or dollar amount; sales occur at the agent’s discretion on a commercially reasonable efforts basis.