INHIBRX BIOSCIENCES INC INBX
COM · Common Stock · CUSIP 45720N103
- SectorHealth care
- IndustryBiological Products, (No Diagnostic Substances)
- HeadquartersLa Jolla, CA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($74.2k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $94.73. Options: 12 managers hold calls ($31.9m notional), 5 hold puts ($4.6m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q2 2024 | 87 |
| Q3 2024 | 97 |
| Q4 2024 | 102 |
| Q1 2025 | 93 |
| Q2 2025 | 90 |
| Q3 2025 | 102 |
| Q4 2025 | 138 |
| Q1 2026 | 135 |
| Q2 2026 | 163 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 55 | 29 |
| Q4 2024 | 38 | 41 |
| Q1 2025 | 25 | 51 |
| Q2 2025 | 30 | 48 |
| Q3 2025 | 48 | 46 |
| Q4 2025 | 79 | 46 |
| Q1 2026 | 72 | 61 |
| Q2 2026 | 104 | 60 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $784.4k | $2.0m | 2.54 |
| Q4 2025 | $54.8m | $44.6m | 0.82 |
| Q1 2026 | $24.8m | $1.1m | 0.05 |
| Q2 2026 | $31.9m | $4.6m | 0.14 |
Biggest buyers
| BANK OF AMERICA CORP /DE/ | Added | +808.5k |
| Schonfeld Strategic Advisors LLC | Added | +442.8k |
| Parkman Healthcare Partners LLC | New | +256.9k |
| GOLDMAN SACHS GROUP INC | Added | +243.1k |
| First Turn Management, LLC | New | +164.8k |
| FIRST TRUST ADVISORS LP | New | +128.4k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Added | +101.0k |
| STATE STREET CORP | Added | +89.6k |
| EVENTIDE ASSET MANAGEMENT, LLC | New | +61.5k |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Added | +50.1k |
Biggest sellers
| VIKING GLOBAL INVESTORS LP | Reduced | -313.8k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -180.7k |
| PERCEPTIVE ADVISORS LLC | Reduced | -144.9k |
| Soleus Capital Management, L.P. | Sold out | -131.0k |
| SummitTX Capital, L.P. | Reduced | -122.6k |
| Sofinnova Investments, Inc. | Reduced | -102.9k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | -80.6k |
| KENNEDY CAPITAL MANAGEMENT LLC | Sold out | -72.8k |
| D. E. Shaw & Co., Inc. | Reduced | -55.1k |
| FMR LLC | Reduced | -51.7k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.8m72.2k shares |
| GOLDMAN SACHS GROUP INC | Unchanged | $6.3m66.5k shares |
| NOMURA HOLDINGS INC | Added | $3.8m40.5k shares |
| Caption Management, LLC | Added | $3.8m40.4k shares |
| CITADEL ADVISORS LLC | Added | $3.5m37.3k shares |
| CDC Financial, Inc. | Reduced | $2.8m30.0k shares |
| JANE STREET GROUP, LLC | Reduced | $1.8m19.2k shares |
| D. E. Shaw & Co., Inc. | Unchanged | $1.7m17.6k shares |
| GROUP ONE TRADING LLC | Added | $615.9k6.5k shares |
| SIG BROKERAGE, LP | Unchanged | $426.4k4.5k shares |
Biggest puts
| NOMURA HOLDINGS INC | New | $2.4m24.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $1.2m12.9k shares |
| CITADEL ADVISORS LLC | Added | $511.6k5.4k shares |
| D. E. Shaw & Co., Inc. | Unchanged | $483.2k5.1k shares |
| SIMPLEX TRADING, LLC | Reduced | $9.5k100 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| PERCEPTIVE ADVISORS LLC 13G · passive investor no change · filed 2026-08-14 | 10.0% |
| VIKING GLOBAL INVESTORS LP 13G · passive investor -0.7 pts · filed 2026-08-14 | 9.3% |
| MORGAN STANLEY 13G · institution new · filed 2026-02-11 | 7.9% |
| Kayyem Jon Faiz 13D · may seek influence filed 2025-02-26 | 7.9% |
| Lappe Mark 13D · may seek influence filed 2025-02-26 | 6.4% |
| Schonfeld Strategic Advisors LLC 13G · institution new · filed 2026-08-14 | 5.3% |
| BlackRock, Inc. 13G · institution +0.6 pts · filed 2026-01-21 | 5.3% |
Fell to 5% or below in the last year: BANK OF AMERICA CORP /DE/ (2.4%, 2026-10-28)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 2 | $1.6m | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 3 | $5.5m | 1 | $279.0k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-28 | Lappe Mark Chief Executive Officer, director · By the Lappe Family Trust | Bought | $453.4k4.5k shares |
| 2026-09-25 | Lappe Mark Chief Executive Officer, director · By the Lappe Family Trust | Bought | $545.4k5.5k shares |
| 2026-09-23 | Kayyem Jon Faiz Director · By The Jon F. Kayyem and Paige Gates-Kayyem Family Trust | Bought | $500.0k5.0k shares |
| 2026-09-16 | Kayyem Jon Faiz Director · By The Jon F. Kayyem and Paige Gates-Kayyem Family Trust | Bought | $500.0k5.0k shares |
| 2026-09-15 | MANHARD KIMBERLY Director · Kimberly Joan Manhard Revocable Trust, Dtd 6/4/2012 | Sold | $52.5k500 shares |
| 2026-09-14 | MANHARD KIMBERLY Director · Kimberly Joan Manhard Revocable Trust, Dtd 6/4/2012 | Sold | $55.1k500 shares |
| 2026-09-11 | MANHARD KIMBERLY Director · Kimberly Joan Manhard Revocable Trust, Dtd 6/4/2012 | Sold | $55.9k500 shares |
| 2026-09-09 | MANHARD KIMBERLY Director · Kimberly Joan Manhard Revocable Trust, Dtd 6/4/2012 | Sold | $57.9k500 shares |
| 2026-09-08 | Lappe Mark Chief Executive Officer, director · By the Lappe Family Trust | Bought | $2.6m25.0k shares |
| 2026-09-08 | Kayyem Jon Faiz Director · By The Jon F. Kayyem and Paige Gates-Kayyem Family Trust | Bought | $567.6k5.0k shares |
| 2026-09-08 | FORSYTH DOUGLAS Director · By the Forsyth Family Trust Dated July 20, 2001 | Bought | $286.6k2.5k shares |
| 2026-09-08 | MANHARD KIMBERLY Director · Kimberly Joan Manhard Revocable Trust, Dtd 6/4/2012 | Sold | $57.6k500 shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| MORGAN STANLEY 0.01% of their portfolio | 1.3m $123.9m | Added +45.0k |
| PERCEPTIVE ADVISORS LLC 1.91% of their portfolio | 1.3m $123.0m | Reduced -144.9k |
| Sanofi 20.54% of their portfolio | 1.2m $109.7m | Unchanged |
| VIKING GLOBAL INVESTORS LP 0.30% of their portfolio | 1.1m $106.5m | Reduced -313.8k |
| HighTower Advisors, LLC 0.08% of their portfolio | 870.6k $82.5m | Added +351 |
| BANK OF AMERICA CORP /DE/ 0.01% of their portfolio | 841.1k $79.7m | Added +808.5k |
| BlackRock, Inc. 0.00% of their portfolio | 826.0k $78.3m | Added +27.1k |
| Schonfeld Strategic Advisors LLC 0.35% of their portfolio | 697.6k $66.1m | Added +442.8k |
| STATE STREET CORP 0.00% of their portfolio | 640.5k $60.7m | Added +89.6k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 492.5k $46.7m | Added +6.1k |
| Woodline Partners LP 0.12% of their portfolio | 400.9k $38.0m | Added +16.5k |
| Capital Research Global Investors 0.00% of their portfolio | 363.1k $34.4m | Reduced -29.8k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 338.2k $32.0m | Added +243.1k |
| PFM Health Sciences, LP 2.54% of their portfolio | 308.4k $29.2m | Added +3.0k |
| Sofinnova Investments, Inc. 1.53% of their portfolio | 303.1k $28.7m | Reduced -102.9k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.04% of their portfolio | 271.7k $25.7m | Added +101.0k |
| Parkman Healthcare Partners LLC 2.50% of their portfolio | 256.9k $24.3m | New |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 256.2k $24.3m | Added +24.7k |
| First Turn Management, LLC 1.67% of their portfolio | 164.8k $15.6m | New |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 147.2k $13.9m | Reduced -180.7k |
| CDC Financial, Inc. 10.20% of their portfolio | 140.1k $13.3m | Added +15.6k |
| FIRST TRUST ADVISORS LP 0.01% of their portfolio | 128.4k $12.2m | New |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 122.6k $11.6m | Added +50.1k |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC 0.05% of their portfolio | 119.2k $11.3m | Reduced -5.8k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 101.0k $9.6m | Added +7.3k |
| NORGES BANK 0.00% of their portfolio | 90.3k $8.6m | Not comparable |
| CITIGROUP INC 0.00% of their portfolio | 75.7k $7.2m | Added +13.2k |
| Jefferies Financial Group Inc. 0.06% of their portfolio | 73.4k $7.0m | Added +34.4k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 69.9k $6.6m | Added +5.6k |
| RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio | 62.2k $5.9m | Added +12.0k |
| EVENTIDE ASSET MANAGEMENT, LLC 0.08% of their portfolio | 61.5k $5.8m | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 59.8k $5.7m | Added +27.3k |
| Voleon Capital Management LP 0.10% of their portfolio | 58.4k $5.5m | Added +19.1k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.02% of their portfolio | 48.8k $4.6m | Added +35.3k |
| Western Standard LLC 1.51% of their portfolio | 47.0k $4.5m | New |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 36.4k $3.5m | Added +25.5k |
| ArrowMark Colorado Holdings LLC 0.14% of their portfolio | 35.2k $3.3m | Unchanged |
| UBS Group AG 0.00% of their portfolio | 35.0k $3.3m | Reduced -13.1k |
| HUSSMAN STRATEGIC ADVISORS, INC. 0.69% of their portfolio | 31.5k $3.0m | New |
| Empyrean Capital Partners, LP 0.10% of their portfolio | 30.0k $2.8m | New |
| Atom Investors LP 0.25% of their portfolio | 29.6k $2.8m | Added +3.1k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 28.7k $2.7m | Added +3.0k |
| Corient Private Wealth LP 0.00% of their portfolio | 28.7k $2.7m | Reduced -161 |
| Bank of New York Mellon Corp 0.00% of their portfolio | 26.2k $2.5m | Added +326 |
| Point72 Asset Management, L.P. 0.00% of their portfolio | 26.0k $2.5m | New |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 25.2k $2.4m | Added +5.0k |
| Informed Momentum Co LLC 0.19% of their portfolio | 23.1k $2.2m | New |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management 0.03% of their portfolio | 22.6k $2.1m | Unchanged |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 22.3k $2.1m | Reduced -55.1k |
| Nicholas Investment Partners, LP 0.11% of their portfolio | 21.4k $2.0m | New |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 21.4k $2.0m | Reduced -4.4k |
| Opaleye Management Inc. 0.17% of their portfolio | 20.3k $1.9m | New |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 20.1k $1.9m | Added +20.0k |
| Nuveen, LLC 0.00% of their portfolio | 18.7k $1.8m | Added +1.5k |
| XTX Topco Ltd 0.02% of their portfolio | 18.4k $1.7m | Reduced -1.8k |
| Verition Fund Management LLC 0.01% of their portfolio | 18.0k $1.7m | New |
| Quantinno Capital Management LP 0.00% of their portfolio | 17.4k $1.6m | Reduced -308 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 17.3k $1.6m | Reduced -80.6k |
| Invesco Ltd. 0.00% of their portfolio | 16.9k $1.6m | Reduced -6.5k |
| Ratan Capital Management LP 0.51% of their portfolio | 16.6k $1.6m | New |
| SummitTX Capital, L.P. 0.04% of their portfolio | 15.3k $1.4m | Reduced -122.6k |
| Swiss National Bank 0.00% of their portfolio | 13.9k $1.3m | Reduced -500 |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 13.3k $1.3m | Reduced -20.9k |
| SG Americas Securities, LLC 0.00% of their portfolio | 12.5k $1.2m | New |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 12.1k $1.1m | Added +623 |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 11.2k $1.1m | Added +2.9k |
| Rafferty Asset Management, LLC 0.00% of their portfolio | 11.1k $1.1m | Reduced -4.6k |
| Tidal Investments LLC 0.00% of their portfolio | 10.2k $963.6k | New |
| Tema ETFs LLC 0.03% of their portfolio | 10.2k $963.6k | First filing |
| Janney Montgomery Scott LLC 0.00% of their portfolio | 9.8k $927.0k | Added +3.4k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 9.7k $648.8k | Added +700 |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 9.6k $907.6k | Added +2.1k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 9.6k $906.1k | Added +5.6k |
| Ethic Inc. 0.01% of their portfolio | 9.3k $885.4k | Reduced -143 |
| MARSHALL WACE, LLP 0.00% of their portfolio | 8.8k $833.8k | Reduced -12.1k |
| Meridian Wealth Advisors, LLC 0.09% of their portfolio | 8.5k $805.4k | Reduced -2.0k |
| NOMURA HOLDINGS INC 0.00% of their portfolio | 8.0k $758.0k | New |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 7.8k $741.0k | Added +800 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 7.7k $734.0k | Added +7.3k |
| Brevan Howard Capital Management LP 0.01% of their portfolio | 7.6k $724.7k | New |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 7.4k $701.3k | Unchanged |
| Squarepoint Ops LLC 0.00% of their portfolio | 6.5k $619.9k | Reduced -9.1k |
| Creative Planning 0.00% of their portfolio | 6.5k $617.2k | Reduced -104 |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 6.3k $599.4k | Added +2.9k |
| PLATINUM INVESTMENT MANAGEMENT LTD 0.14% of their portfolio | 6.1k $582.3k | New |
| Cannon Global Investment Management, LLC 1.68% of their portfolio | 5.9k $559.0k | New |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 5.7k $538.7k | Added +327 |
| MetLife Investment Management, LLC 0.00% of their portfolio | 5.6k $534.2k | Added +398 |
| PROFUND ADVISORS LLC 0.01% of their portfolio | 5.6k $532.5k | Reduced -1.4k |
| ExodusPoint Capital Management, LP 0.00% of their portfolio | 5.6k $531.7k | Reduced -25.4k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 5.4k $509.6k | New |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 5.3k $502.3k | Added +328 |
| Legal & General Group Plc 0.00% of their portfolio | 5.1k $486.8k | Added +129 |
| Persium Advisors, LLC 0.30% of their portfolio | 4.9k $461.9k | New |
| Dynamic Advisor Solutions LLC 0.01% of their portfolio | 4.8k $457.1k | New |
| VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio | 4.8k $454.7k | Unchanged |
| Balyasny Asset Management L.P. 0.00% of their portfolio | 4.7k $448.0k | New |
| Mariner, LLC 0.00% of their portfolio | 4.6k $432.9k | New |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio | 4.3k $405.2k | Added +476 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 4.2k $398.5k | Reduced -22 |