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NASDAQ: INBX
Inhibrx Biosciences Inc Stock Ownership - Who owns Inhibrx Biosciences?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Inhibrx Biosciences Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Mark LappeCEO2026-10-14100$85.76
$8.58kBuy
Mark LappeCEO2026-10-14100$85.76
$8.58kBuy
Mark LappeCEO2026-10-142,470$84.07
$207.66kBuy
Mark LappeCEO2026-10-142,470$85.00
$209.95kBuy
Mark LappeCEO2026-10-142,451$85.00
$208.33kBuy
Mark LappeCEO2026-10-142,449$84.07
$205.89kBuy
Mark LappeCEO2026-09-281,500$98.88
$148.32kBuy
Mark LappeCEO2026-09-283,000$101.70
$305.11kBuy
Mark LappeCEO2026-09-252,176$99.60
$216.73kBuy
Mark LappeCEO2026-09-253,324$98.87
$328.63kBuy

1 of 3

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Net Insider Buy/Sell (L12M) Ownership

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INBX Shareholders

What type of owners hold Inhibrx Biosciences Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Jon Faiz Kayyem14.49%2,133,092$153.92MInsider
Mark Lappe13.36%1,966,001$141.87MInsider
Inhibrx Inc7.87%1,157,926$83.56MInsider
Brendan P. Eckelman3.22%473,888$34.20MInsider
Douglas Forsyth3.07%451,628$32.59MInsider
Viking Global Investors LP0.70%102,864$7.42MInsider
Kristiina Md Vuori0.14%20,443$1.48MInsider
Kimberly Manhard0.05%7,500$541.20kInsider
Morsta0.01%1,308$94.39kInstitution
Morgan Stanley0.01%1,308$94.39kInstitution

1 of 3

INBX vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
INBX0.10%42.90%Net BuyingNet Buying
AVLN0.10%29.18%Net Buying
MNKD0.06%97.23%Net SellingNet Selling
VOR0.08%28.06%Net SellingNet Buying
RAPP0.11%42.71%Net BuyingNet Buying
View Top Biotech Stocks

Inhibrx Biosciences Stock Ownership FAQ

Who owns Inhibrx Biosciences?

Inhibrx Biosciences (NASDAQ: INBX) is owned by 0.10% institutional shareholders, 42.90% Inhibrx Biosciences insiders, and 57.01% retail investors. Jon Faiz Kayyem is the largest individual Inhibrx Biosciences shareholder, owning 2.13M shares representing 14.49% of the company. Jon Faiz Kayyem's Inhibrx Biosciences shares are currently valued at $172.95M.

If you're new to stock investing, here's how to buy Inhibrx Biosciences stock.
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