Transaction · 0002126186-26-000002

Portman David J.

Portman David J., 10%, reported an open-market or private purchase at LeonaBio, Inc. involving 5502402.000000 shares for an estimated $17329650026.94. Reported holdings after the transaction were 0.000000 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 value-$17.3BShares × reported price
Shares traded5.50M$3,149.47 per share
Holdings after0Indirect · See note
% of reported position tradedUnavailableThis security and ownership context
How reported position traded is calculated

Not calculated for derivative securities.

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.

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

Derivative
Type
Buy
Code P
Identifier
0002126186-26-000002
Warrant
Transaction date
Oct 26, 2026
Filed Oct 29, 2026, 12:43 AM · 3d delay
Shares
5,502,402 sh
$3,149.47 per share
Estimated value
-$17.3B
Computed from shares × price
Holdings after
0 sh
Indirect · See note

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Derivative Transaction Large Buy Repeat Buyer 10% Owner Buy
Filing-only score

+18 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.
  • repeat_buyer+8 points

    repeat-buyer signal matched

    Same insider bought again within the configured window.
  • large_buy_absolute+10 points

    large-buy signal with absolute_triggered = true

    Open-market purchase exceeds the configured absolute threshold.
  • derivative_transaction-16 points

    is_derivative = true

    Derivative exercise rows are less discretionary than open-market purchases.
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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