Transaction · 0001366074-26-000002

Lappe Mark

Lappe Mark, CEO, reported an open-market or private purchase at Inhibrx Biosciences, Inc. involving 1100.000000 shares for an estimated $117836.29. Reported holdings after the transaction were 719148.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market buySEC transaction code PCEO
INBXInhibrx Biosciences, Inc.
Trade date
Sep 08, 2026
Filing date
Sep 08, 2026
View on SEC Insider profile
Estimated value$117kShares × reported price
Shares traded1.10k$107.12 per share
Holdings after719kIndirect · By the Lappe Family Trust
% of reported position traded0.15%This security and ownership context
How reported position traded is calculated

Shares purchased ÷ (holdings after − shares purchased). Estimated position before: 718,048 shares.

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.

INBX price since this filing

Daily closing prices, with the filing date and available return windows
INBX · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago1w ago1d ago
Returns since7d -7.6%30d -18.3%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Buy
Code P
Identifier
0001366074-26-000002
Common Stock
Transaction date
Sep 08, 2026
Filed Sep 08, 2026, 08:04 PM · 0d delay
Shares
1,100 sh
$107.12 per share
Estimated value
$117k
Computed from shares × price
Holdings after
719,148 sh
Indirect · By the Lappe Family Trust

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
CEO Buy Director Buy Repeat Buyer
Filing-only score

+36 points

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

Strong filing signal

This filing has a high positive filing-only score. It may deserve closer research, but it is not an investment recommendation.

How this score is calculated
  • open_market_purchase+12 points

    transaction_code = P

    Code P is a discretionary open-market purchase.
  • ceo_buy+12 points

    is_officer + officer_title/role mentions CEO

    CEO open-market purchase.
  • repeat_buyer+8 points

    repeat-buyer signal matched

    Same insider bought again within the configured window.
  • timely_filing+4 points

    reporting_delay_days = 0

    Filing reported within two business days of the transaction.
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

Chief Executive Officer

Officer YesDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    The shares were purchased in multiple transactions at prices ranging from $98.88 to $99.8316 inclusive. The reported price reflects the weighted-average purchase price. The reporting person hereby und…

  2. F2

    These securities are directly owned by the Lappe Family Trust. Mark P. Lappe is a trustee of the Lappe Family Trust and, in such capacity, may be deemed to indirectly beneficially own the securities o…

  3. F3

    The shares were purchased in multiple transactions at prices ranging from $100.095 to $100.99 inclusive. The reported price reflects the weighted-average purchase price. The reporting person hereby un…

  4. F4

    The shares were purchased in multiple transactions at prices ranging from $106.6225 to $107.57 inclusive. The reported price reflects the weighted-average purchase price. The reporting person hereby u…

  5. F5

    The shares were purchased in multiple transactions at prices ranging from $108.05 to $108.66 inclusive. The reported price reflects the weighted-average purchase price. The reporting person hereby und…

  6. F6

    The shares were purchased in multiple transactions at prices ranging from $111.15 to $112.07 inclusive. The reported price reflects the weighted-average purchase price. The reporting person hereby und…

  7. F7

    The shares were purchased in multiple transactions at prices ranging from $112.15 to $112.44 inclusive. The reported price reflects the weighted-average purchase price. The reporting person hereby und…

  8. F8

    These securities are directly owned by a trust, for the benefit of the reporting person's immediate family. Mark P. Lappe, as an immediate family member of the beneficiaries of the trust, may be deeme…

Original filing · 0001366074-26-000002
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