RLYB.NASDAQRallybio CORP

SCHEDULE: FMR LLC Discloses 10.6% Stake in Rallybio Corp

Sentiment:

Beneficial Ownership Disclosure 6 March 2026 10:12 AM

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FMR LLC and Abigail P. Johnson have reported a 10.6% beneficial ownership stake in Rallybio Corp's common stock.

Summary

FMR LLC and Abigail P. Johnson beneficially own 561,798 shares of Rallybio Corp's common stock.
This ownership represents 10.6% of the total outstanding common stock of Rallybio Corp.
The filing is an Amendment No. 1 to a Schedule 13G, indicating a change from a previous filing or an initial filing under specific conditions.
FMR LLC is classified as a parent holding company, and Abigail P. Johnson is an individual.
The securities were not acquired or held for the purpose of changing or influencing control of Rallybio Corp, except for activities related to nominations under Rule 14a-11.
The ownership is held through various entities including Fidelity Management & Research Company LLC, Fidelity Management Trust Company, and IMPRESA MANAGEMENT LLC.

Sentiment

Score: 7

Explanation: StockSavvy.ai views this as a moderately positive development, as a significant stake by a reputable institutional investor like FMR LLC can instill confidence and potentially attract further investment into Rallybio Corp.

Positives

A significant 10.6% stake by a major institutional investor like FMR LLC can signal confidence in Rallybio Corp's long-term prospects.
The investment by FMR LLC, a prominent asset manager, may attract further institutional interest and potentially improve liquidity for Rallybio Corp's stock.

Negatives

No specific negatives are directly stated in this ownership disclosure.

Risks

The filing explicitly states that the securities were not acquired or held for the purpose of changing or influencing control of the issuer, which mitigates immediate control-related risks.
No other specific risks related to Rallybio Corp's operations or financial health are disclosed in this ownership statement.

Future Outlook

Management Comments

To the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under §§ 240.14a-11.

Industry Context

StockSavvy.ai notes that a significant stake by FMR LLC, a major global asset manager, in Rallybio Corp suggests a potential long-term investment thesis in the company's sector, often seen as a vote of confidence in the issuer's business model or pipeline, particularly for smaller-cap companies.

Comparison to Industry Standards

StockSavvy.ai observes that institutional ownership by firms like FMR LLC is a common indicator of perceived value or growth potential.
While specific comparable companies or projects are not detailed in this filing, a 10.6% stake by such a prominent investor is a substantial position, often exceeding typical initial passive stakes and indicating a more committed investment compared to smaller, more diversified holdings seen in many institutional portfolios.

Stakeholder Impact

Shareholders: Increased institutional backing may lead to greater confidence and potentially improved stock liquidity.
Management: A significant institutional investor may bring increased scrutiny and engagement regarding corporate strategy and performance.

Key Dates

Date	Description
2023-01-03	Effective date of Power of Attorney for FMR LLC.
2023-01-10	Date of Schedule 13G filing by FMR LLC where Power of Attorney (accession number: -23-000003) was incorporated by reference.
2023-01-26	Effective date of Power of Attorney for Abigail P. Johnson.
2023-01-31	Date of Schedule 13G filing by FMR LLC where Power of Attorney (accession number: -23-000038) for Abigail P. Johnson was incorporated by reference.
2026-03-04	Date of event which requires filing of this statement.
2026-03-05	Signature date of the Schedule 13G filing by FMR LLC and Abigail P. Johnson.

Recommendation

hold

The disclosure of a significant 10.6% stake by FMR LLC in Rallybio Corp is a positive signal, indicating institutional confidence. However, without additional financial or operational details from Rallybio Corp, a 'hold' recommendation is prudent. Investors should monitor future company performance and FMR LLC's continued involvement, as this filing primarily reflects an ownership position rather than a fundamental performance update.

Keywords

Rallybio Corp, FMR LLC, Abigail P. Johnson, Schedule 13G, Beneficial Ownership, Institutional Investor, Common Stock, SEC Filing

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