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INBX · Inhibrx Biosciences, Inc.

Everything on this page is public record — SEC Form 4 filings and congressional disclosures — alongside any INSIDER SCANNER research case for this company.

Open-market buys9
Open-market sells0
Total purchased$2,131,540
Unique insiders buying2
Most senior buyerCEO
Avg price paid$94.86
Research cases0
Last filing2026-10-14

Average price paid is weighted by shares, so a large purchase counts for more than a small one. It is what insiders reported paying, not a target or a fair value.

Insider flow: Buying only — a count of disclosed transactions, not a rating or a recommendation.

Insider transaction timeline

Every reported transaction, positioned by trade date. Purchases sit above the axis, sales below; circle area is proportional to dollar value. No share-price line is drawn — this feed carries transaction prices only, and a price history inferred from them would imply market data the filings do not contain.

Open-market purchase Open-market sale
2026-09-23 — Kayyem Jon Faiz · bought 5,000 @ $100.00 2026-09-25 — Lappe Mark · bought 2,176 @ $99.60 2026-09-25 — Lappe Mark · bought 3,324 @ $98.87 2026-09-28 — Lappe Mark · bought 1,500 @ $98.88 2026-09-28 — Lappe Mark · bought 3,000 @ $101.70 2026-10-14 — Lappe Mark · bought 2,470 @ $85.00 2026-10-14 — Lappe Mark · bought 100 @ $85.76 2026-10-14 — Lappe Mark · bought 2,449 @ $84.07 2026-10-14 — Lappe Mark · bought 2,451 @ $85.00
2026-09-232026-10-14

Insider cost basis

Share-weighted average price across 9 reported purchases, with the full range of prices paid. Purchases only — averaging a sale into an "insider cost" would describe a price nobody paid.

$84.07 $101.70
$94.86 weighted average insider purchase price

Insider participation

One row per insider, one cell per reported transaction, shaded by value. Repeat buying and activity clustered in time are visible at a glance.

Lappe Mark Chief Executive Officer, Director
Kayyem Jon Faiz Director
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The analysis built on top of these filings

The filings above are public record and stay public here. What an account adds for $INBX is the reading of them — and for this company, that is what the list below says it is, no more.

  • Insider cost basisShare-weighted average price paid across the 9 reported purchases, with the full range, against the current price.
  • Insider participationWho bought, how often, and how the buying is distributed across the people filing — one person repeating is not several agreeing.
  • Transaction timelineThe [{'transaction_date': '2026-10-14', 'insider_name': 'Lappe Mark', 'insider_title': 'Chief Executive Officer, Director', 'transaction_type': 'Open-market buy', 'shares': 2470.0, 'price': 84.9992, 'value': 209948.02, 'is_buy': True}, {'transaction_date': '2026-10-14', 'insider_name': 'Lappe Mark', 'insider_title': 'Chief Executive Officer, Director', 'transaction_type': 'Open-market buy', 'shares': 100.0, 'price': 85.76, 'value': 8576.0, 'is_buy': True}, {'transaction_date': '2026-10-14', 'insider_name': 'Lappe Mark', 'insider_title': 'Chief Executive Officer, Director', 'transaction_type': 'Open-market buy', 'shares': 2449.0, 'price': 84.0707, 'value': 205889.14, 'is_buy': True}, {'transaction_date': '2026-10-14', 'insider_name': 'Lappe Mark', 'insider_title': 'Chief Executive Officer, Director', 'transaction_type': 'Open-market buy', 'shares': 2451.0, 'price': 84.9992, 'value': 208333.04, 'is_buy': True}, {'transaction_date': '2026-09-28', 'insider_name': 'Lappe Mark', 'insider_title': 'Chief Executive Officer, Director', 'transaction_type': 'Open-market buy', 'shares': 1500.0, 'price': 98.88, 'value': 148320.0, 'is_buy': True}, {'transaction_date': '2026-09-28', 'insider_name': 'Lappe Mark', 'insider_title': 'Chief Executive Officer, Director', 'transaction_type': 'Open-market buy', 'shares': 3000.0, 'price': 101.7, 'value': 305100.0, 'is_buy': True}, {'transaction_date': '2026-09-25', 'insider_name': 'Lappe Mark', 'insider_title': 'Chief Executive Officer, Director', 'transaction_type': 'Open-market buy', 'shares': 2176.0, 'price': 99.6, 'value': 216729.6, 'is_buy': True}, {'transaction_date': '2026-09-25', 'insider_name': 'Lappe Mark', 'insider_title': 'Chief Executive Officer, Director', 'transaction_type': 'Open-market buy', 'shares': 3324.0, 'price': 98.87, 'value': 328643.88, 'is_buy': True}, {'transaction_date': '2026-09-23', 'insider_name': 'Kayyem Jon Faiz', 'insider_title': 'Director', 'transaction_type': 'Open-market buy', 'shares': 5000.0, 'price': 100.0, 'value': 500000.0, 'is_buy': True}] reported transactions plotted over the window rather than listed, so concentration is visible.

Not available for INBX today: no research case — nothing here has cleared the scoring threshold. Both appear on this page on their own if that changes.

A free account opens all of it.

Not financial advice. This page reports public filings and past research output. It is not a recommendation to buy or sell, and no price target here is a prediction. Trade at your own risk.