SightfileU.S. market data from official filings

Rallybio Corp (RLYB)

Name: Rallybio Corp (RLYB) — Institutional ownership, SEC filings and insider activity
Creator: Sightfile
License: https://www.sec.gov/privacy#dissemination

Institutional ownership, SEC filings and insider activity

Sector: Healthcare & Pharma · SEC CIK 0001739410 · EDGAR filings · Updated 2026-07-15

Rallybio Corp (RLYB) has reported institutional ownership of 88.2%, with 38 institutional managers holding positions valued at $41.9M per the latest 13F reporting period. SEC filings include an active notice of delisting or failure to satisfy a continued listing rule (8-K Item 3.01), substantial-doubt (going concern) disclosure per the filings.

Institutional ownership

88.2%

Institutional managers

Reported 13F value

$41.9M

Insider activity

2 trans.

−$3.99K net selling

Data flags

2 active

from SEC filings

Latest updates

2026-07-15 — S-4 filed
2026-07-10 — Insider transaction reported (Form 4)
2026-06-05 — SCHEDULE 13G filed
2026-06-01 — 425 filed
2026-06-01 — Current report (8-K) filed
2026-05-20 — Insider transaction reported (Form 4)

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, Rallybio Corp has 38 institutional holders and institutional ownership of 88.2%.

Insider activity

Insiders reported 2 transactions (0 buys, 1 sells) across 2 reporting insiders, with a net reported value of −$3.99K.

Data flags from SEC filings

Active substantial-doubt (going concern) disclosure per the filings, most recently filed 2026-03-16 (recurring since 2022-03-15) — source filing. The authoritative details are those stated in the filing itself.

Active notice of delisting or failure to satisfy a continued listing rule (8-K Item 3.01), most recently filed 2025-08-29 (recurring since 2025-02-25) — source filing. The authoritative details are those stated in the filing itself.

Related companies

ATYR PHARMA INC (ATYR) · Adicet Bio Inc (ACET) · SATELLOS BIOSCIENCE INC (MSLE) · GREENWICH LIFESCIENCES INC (GLSI) · PULMONX CORP (LUNG) · LUCID DIAGNOSTICS INC (LUCD)

See full history, cross-references and alerts on Sightfile

Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-07-15.