Transaction · 0002126186-26-000002

Portman David J.

Portman David J., 10%, reported an open-market or private purchase at LeonaBio, Inc. involving 3149470.000000 shares. Reported holdings after the transaction were 3149470.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market buySEC transaction code P10%
LONALeonaBio, Inc.
Trade date
Oct 26, 2026
Filing date
Oct 29, 2026
View on SEC Insider profile
Disclosed valueUnknownShares × reported priceEstimated market value $14,991,477.20. Alpaca unadjusted close on 2026-10-26. Not the disclosed execution price.
Shares traded3.14MPrice unknown
Holdings after3.14MIndirect · See note
% of reported position tradedUnavailableThis security and ownership context
How reported position traded is calculated

New position: there is no prior reported position to use as a percentage baseline.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

Filing warnings

Notes recorded with this filing
1 warning
reported price under reviewThe reported price differs greatly from the transaction-date market range. Its disclosed value is unknown; any market estimate is separate.

LONA price since this filing

Daily closing prices, with the filing date and available return windows
LONA · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago1w ago1d ago
Returns since7d30d90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Buy
Code P
Identifier
0002126186-26-000002
Common Stock
Transaction date
Oct 26, 2026
Filed Oct 29, 2026, 12:43 AM · 3d delay
Shares
3,149,470 sh
Price unknown
Estimated value
—
Computed from shares × price
Holdings after
3,149,470 sh
Indirect · See note

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Large Holdings Increase 10% Owner Buy
Filing-only score

+16 points

Compact filing score computed from stored Form 4 facts. Version v1.

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

How this score is calculated
  • open_market_purchase+12 points

    transaction_code = P

    Code P is a discretionary open-market purchase.
  • ten_percent_owner_buy+4 points

    is_ten_percent_owner = true

    10% beneficial owner open-market purchase.
  • large_holdings_increase+8 points

    large-holdings-increase signal matched

    Reported acquired shares meet the configured percentage of post-transaction holdings.
  • missing_price-8 points

    price_cents is null

    Missing price reduces confidence in value-based signals.
Missing facts
  • price_cents
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector No10% YesOther No
Footnotes & amended
  1. F1

    The shares are held by Sermonix Pharmaceuticals, Inc. of which Dr. Portman is the Chief Executive Officer. This Form 4 is being filed to report Dr. Portman's voting control over such securities, but D…

  2. F2

    The Warrant does not expire.

  3. F3

    The Warrant was held by Sermonix Pharmaceuticals, Inc. of which Dr. Portman is the Chief Executive Officer. The Warrant was exercised on October 26, 2026, in part, into 3,149,740 Common Shares of Issu…

Original filing · 0002126186-26-000002
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