Transaction · 0001366074-26-000002

Lappe Mark

Lappe Mark, CEO, reported an open-market or private purchase at Inhibrx Biosciences, Inc. involving 500.000000 shares for an estimated $54117.50. Reported holdings after the transaction were 719648.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market buySEC transaction code PCEO
INBXInhibrx Biosciences, Inc.
Filing timeSep 08
Trade dateSep 08, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
Pre-filing
1mo ago1w ago1d ago
Returns since
7d30d90d180d1y

INBX price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
INBX since 2026-09-08Filed yesterday · 1 day of post-filing data
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

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
500 sh
$10.8k per share
Estimated value
$5.41M
Computed from shares × price
Holdings after
719k sh
Indirect · By the Lappe Family Trust

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
CEO Buy Director Buy Repeat Buyer
+36score
Filing-only score

+36

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.

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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