ADAR1-managed funds boost Rallybio Corp (RLYB) stake with open-market buys
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
Rallybio Corp reported that private investment funds and separately managed accounts overseen by ADAR1 Capital Management, LLC made open‑market purchases of its common stock. Across three transactions on May 4–5, 2026, these accounts bought 155,905 shares at per‑share prices around $13.9–$14.0, increasing their indirect position to 779,784 shares. The securities may be deemed indirectly beneficially owned by ADAR1 and by Daniel Schneeberger, though each reporting person disclaims beneficial ownership beyond any pecuniary interest.
Positive
- None.
Negative
- None.
Insights
ADAR1-linked entities added 155,905 Rallybio shares in open‑market buys.
Accounts managed by ADAR1 Capital Management executed three open‑market purchases of Rallybio common stock, totaling 155,905 shares at prices near $13.9–$14.0. Following these trades, their reported indirect holdings rose to 779,784 shares of common stock.
The transactions are all coded as open‑market purchases (P) with no related option exercises or derivative activity, and derivative positions are not listed. The filing notes that securities are held by funds and separately managed accounts, with ADAR1 and Daniel Schneeberger potentially deemed indirect owners but disclaiming beneficial ownership beyond pecuniary interest.
These are net purchase transactions with a net-buy direction in the summary, indicating additional exposure rather than profit‑taking. The filing does not reference any Rule 10b5‑1 trading plan, so timing context beyond the disclosed trade dates of May 4–5, 2026 is not provided.
Insider Trade Summary
Net Buyer: 155,905 shares ($2,178,668)
Net Buy
3 txns
Insider
ADAR1 Capital Management, LLC, Schneeberger Daniel
Role
null | null
Bought
155,905 shs ($2.18M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Purchase | Common Stock | 35,101 | $13.9956 | $491K |
| Purchase | Common Stock | 3,900 | $13.8978 | $54K |
| Purchase | Common Stock | 116,904 | $13.9705 | $1.63M |
Holdings After Transaction:
Common Stock — 779,784 shares (Indirect, See Footnote)
Footnotes (1)
- The reported price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.8611 to $14.0000, inclusive. Each Reporting Person undertakes to provide to Rallybio Corporation, any security holder of Rallybio Corporation or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The reported price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.8600 to $14.0000, inclusive. Each Reporting Person undertakes to provide to Rallybio Corporation, any security holder of Rallybio Corporation or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The reported price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.9100 to $14.0000, inclusive. Each Reporting Person undertakes to provide to Rallybio Corporation, any security holder of Rallybio Corporation or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. The reported securities are owned directly by private investment funds managed by ADAR1 Capital Management, LLC and separately managed accounts of ADAR1 Capital Management, LLC, and may be deemed to be indirectly beneficially owned by (i) ADAR1 Capital Management, LLC and (ii) Daniel Schneeberger, the sole manager of ADAR1 Capital Management, LLC. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.
Key Figures
Total shares purchased: 155,905 shares
Trade 1 size: 35,101 shares
Trade 2 size: 116,904 shares
+3 more
6 metrics
Total shares purchased
155,905 shares
Aggregate net buys across three open-market trades
Trade 1 size
35,101 shares
Open-market purchase on May 5, 2026 at $13.9956
Trade 2 size
116,904 shares
Open-market purchase on May 4, 2026 at $13.9705
Trade 3 size
3,900 shares
Open-market purchase on May 4, 2026 at $13.8978
Holdings after trades
779,784 shares
Indirect Rallybio common stock position after May 5, 2026 trade
Price range footnote F1
$13.8611–$14.0000
Weighted-average execution range for one purchase block
Key Terms
weighted average price, indirectly beneficially owned, pecuniary interest, Section 16 of the Securities Exchange Act of 1934, +1 more
5 terms
weighted average price financial
"The reported price is a weighted average price. These shares were purchased in multiple transactions..."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
indirectly beneficially owned financial
"may be deemed to be indirectly beneficially owned by (i) ADAR1 Capital Management, LLC and (ii) Daniel Schneeberger..."
pecuniary interest financial
"disclaims beneficial ownership of any such securities, except to the extent of his/its pecuniary interest therein..."
Section 16 of the Securities Exchange Act of 1934 regulatory
"For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership..."
A provision of federal securities law that requires company insiders—directors, officers and large shareholders—to publicly report their stock holdings and trades and to surrender any “short-swing” profits from purchases and sales within a six-month window. It acts like a rule that forces leaders to announce their trades and prevents quick buy-sell windfalls, giving investors transparency into insider activity and reducing opportunities for unfair gain.
separately managed accounts financial
"owned directly by private investment funds managed by ADAR1 Capital Management, LLC and separately managed accounts of ADAR1..."
A separately managed account is an investment portfolio owned by a single investor but professionally managed to that investor’s specific goals and preferences, rather than pooled with other clients’ money. It matters to investors because it offers greater customization, tax control and transparency—like hiring a personal chef instead of eating from a shared buffet—though it often requires higher minimums and can have different fee and liquidity implications.
FAQ
What is Rallybio (RLYB) insider ownership after these transactions?
After the latest reported purchase, the accounts managed by ADAR1 held 779,784 Rallybio common shares indirectly. This figure reflects the total shares reported following the May 5, 2026 trade, according to the Form 4’s post-transaction ownership field for the managed accounts.
Do ADAR1 and Daniel Schneeberger fully acknowledge beneficial ownership of Rallybio (RLYB) shares?
No. The filing states each reporting person disclaims beneficial ownership of the securities beyond any pecuniary interest. This means they do not concede full beneficial ownership for Section 16 purposes, despite being listed as potential indirect beneficial owners.