IMMIX BIOPHARMA INC IMMX
COM · Common Stock · CUSIP 45258H106
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersLos Angeles, 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. Holder counts are more reliable. Shares outstanding: 71.5m as of 2026-08-03, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $10.31. Options: 3 managers hold calls ($1.0m notional), 2 hold puts ($308.3k).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 13 |
| Q4 2022 | 19 |
| Q1 2023 | 13 |
| Q2 2023 | 19 |
| Q3 2023 | 17 |
| Q4 2023 | 29 |
| Q1 2024 | 36 |
| Q2 2024 | 32 |
| Q3 2024 | 26 |
| Q4 2024 | 24 |
| Q1 2025 | 23 |
| Q2 2025 | 24 |
| Q3 2025 | 31 |
| Q4 2025 | 67 |
| Q1 2026 | 77 |
| Q2 2026 | 109 |
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 | 6 | 10 |
| Q4 2024 | 8 | 13 |
| Q1 2025 | 7 | 13 |
| Q2 2025 | 10 | 8 |
| Q3 2025 | 18 | 8 |
| Q4 2025 | 56 | 11 |
| Q1 2026 | 49 | 25 |
| Q2 2026 | 78 | 24 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $0 | $0 | — |
| Q4 2025 | $224.9k | $435.7k | 1.94 |
| Q1 2026 | $236.9k | $947.4k | 4.00 |
| Q2 2026 | $1.0m | $308.3k | 0.30 |
Biggest buyers
| STATE STREET CORP | Added | +2.8m |
| Deep Track Capital, LP | New | +2.8m |
| BlackRock, Inc. | Added | +2.5m |
| Opaleye Management Inc. | New | +2.3m |
| UBS Group AG | Added | +1.9m |
| WELLINGTON MANAGEMENT GROUP LLP | New | +1.5m |
| EVENTIDE ASSET MANAGEMENT, LLC | Added | +1.3m |
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +1.3m |
| Saturn V Capital Management LP | Added | +964.8k |
| GREAT POINT PARTNERS LLC | Added | +927.6k |
Biggest sellers
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | -432.7k |
| Logos Global Management LP | Reduced | -225.0k |
| Blue Owl Capital Holdings LP | Reduced | -110.0k |
| SEI INVESTMENTS CO | Reduced | -79.8k |
| Hudson Bay Capital Management LP | Sold out | -63.5k |
| Brevan Howard Capital Management LP | Sold out | -57.5k |
| Palumbo Wealth Management LLC | Sold out | -55.2k |
| Qube Research & Technologies Ltd | Reduced | -45.7k |
| XTX Topco Ltd | Reduced | -40.6k |
| JANE STREET GROUP, LLC | Sold out | -35.2k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $676.3k65.6k shares |
| CITADEL ADVISORS LLC | New | $325.8k31.6k shares |
| SIMPLEX TRADING, LLC | New | $13.4k1.3k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $226.8k22.0k shares |
| SIMPLEX TRADING, LLC | Reduced | $81.4k7.9k 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 |
|---|---|
| Janus Henderson Group Ltd. 13G · institution +1.0 pts · filed 2026-08-13 | 14.0% |
| Saturn V Capital Management LP 13G · institution new · filed 2026-02-17 | 7.0% |
| EVENTIDE ASSET MANAGEMENT, LLC 13G · institution new · filed 2026-08-14 | 5.6% |
| BlackRock, Inc. 13G · institution new · filed 2026-10-27 | 5.5% |
Fell to 5% or below in the last year: MILLENNIUM MANAGEMENT LLC (3.3%, 2026-05-04)
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 | 1 | $104.3k | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 2 | $10.1k | 0 | — | — |
| Q3 2025 | 2 | $10.2k | 0 | — | — |
| Q4 2025 | 2 | $10.0k | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| Jupiter Topco LLC 0.04% of their portfolio | 9.8m $100.8m | First filing |
| Saturn V Capital Management LP 6.89% of their portfolio | 4.7m $48.0m | Added +964.8k |
| EVENTIDE ASSET MANAGEMENT, LLC 0.54% of their portfolio | 3.9m $40.1m | Added +1.3m |
| STATE STREET CORP 0.00% of their portfolio | 3.0m $30.9m | Added +2.8m |
| BlackRock, Inc. 0.00% of their portfolio | 3.0m $30.8m | Added +2.5m |
| Deep Track Capital, LP 0.42% of their portfolio | 2.8m $28.6m | New |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 2.5m $25.8m | Added +719.1k |
| Opaleye Management Inc. 2.19% of their portfolio | 2.3m $24.2m | New |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 2.1m $21.3m | Added +316.2k |
| UBS Group AG 0.00% of their portfolio | 1.9m $20.0m | Added +1.9m |
| MARSHALL WACE, LLP 0.02% of their portfolio | 1.8m $18.5m | Added +153.4k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 1.7m $17.9m | Added +1.3m |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 1.5m $15.2m | New |
| GREAT POINT PARTNERS LLC 3.10% of their portfolio | 1.3m $13.2m | Added +927.6k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.2m $12.4m | Added +737.7k |
| Velan Capital Investment Management LP 6.85% of their portfolio | 1.1m $11.2m | Added +345.0k |
| Bleichroeder LP 1.84% of their portfolio | 1.0m $10.3m | Unchanged |
| Logos Global Management LP 0.44% of their portfolio | 1.0m $10.3m | Reduced -225.0k |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 969.1k $10.0m | Added +54 |
| Burkehill Global Management, LP 0.20% of their portfolio | 544.1k $5.6m | Added +250.0k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 518.9k $5.3m | New |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 506.2k $5.2m | Added +459.0k |
| Blue Owl Capital Holdings LP 0.69% of their portfolio | 437.6k $4.5m | Reduced -110.0k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 418.1k $4.3m | Added +279.8k |
| Balyasny Asset Management L.P. 0.01% of their portfolio | 417.2k $4.3m | New |
| LGT Fund Management Co Ltd. 0.18% of their portfolio | 416.6k $4.3m | Unchanged |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 413.1k $4.3m | Added +372.0k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 406.0k $4.2m | Added +153.1k |
| Institute for Wealth Management, LLC. 0.31% of their portfolio | 337.6k $3.5m | Unchanged |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 283.7k $2.9m | New |
| SPHERA FUNDS MANAGEMENT LTD. 0.40% of their portfolio | 270.0k $2.8m | New |
| SEVEN GRAND MANAGERS, LLC 0.11% of their portfolio | 255.0k $2.6m | New |
| Bank of New York Mellon Corp 0.00% of their portfolio | 235.7k $2.4m | Added +152.1k |
| KVP Capital Advisors, LP 1.74% of their portfolio | 230.4k $2.4m | Unchanged |
| TD Asset Management Inc 0.00% of their portfolio | 214.1k $2.2m | Added +160.9k |
| J. Goldman & Co LP 0.07% of their portfolio | 198.7k $2.0m | Reduced -29.4k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 174.1k $1.8m | Added +78.7k |
| MORGAN STANLEY 0.00% of their portfolio | 159.5k $1.6m | Added +19.6k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 146.9k $1.5m | Added +117.9k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 142.0k $1.5m | Reduced -45.7k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 127.3k $1.3m | Added +99.8k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 113.3k $1.2m | Added +96.2k |
| Nuveen, LLC 0.00% of their portfolio | 103.0k $1.1m | New |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 93.1k $959.9k | New |
| Informed Momentum Co LLC 0.09% of their portfolio | 92.8k $957.0k | Reduced -28.0k |
| TOCQUEVILLE ASSET MANAGEMENT L.P. 0.01% of their portfolio | 88.5k $913.0k | Reduced -1.0k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 80.0k $824.8k | Unchanged |
| UNITED CAPITAL FINANCIAL ADVISORS, LLC 0.00% of their portfolio | 70.7k $728.7k | Unchanged |
| CITIGROUP INC 0.00% of their portfolio | 70.7k $728.4k | Added +68.2k |
| Squarepoint Ops LLC 0.00% of their portfolio | 70.1k $722.3k | Added +25.6k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 67.3k $694.4k | Reduced -79.8k |
| Rafferty Asset Management, LLC 0.00% of their portfolio | 58.5k $603.0k | New |
| BARCLAYS PLC 0.00% of their portfolio | 53.1k $547.0k | Added +1.3k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 50.9k $525.2k | New |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 40.9k $421.3k | New |
| XTX Topco Ltd 0.01% of their portfolio | 40.5k $417.5k | Reduced -40.6k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 40.2k $414.3k | New |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 39.3k $357.9k | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 38.7k $399.3k | Reduced -432.7k |
| Virtus Investment Advisers, LLC 0.09% of their portfolio | 38.7k $399.2k | New |
| Quadrature Capital Ltd 0.00% of their portfolio | 37.6k $388.0k | New |
| Private Advisor Group, LLC 0.00% of their portfolio | 35.3k $364.2k | Added +600 |
| CERTUITY, LLC 0.02% of their portfolio | 35.0k $360.9k | Unchanged |
| PROFUND ADVISORS LLC 0.01% of their portfolio | 29.3k $302.1k | New |
| Imprint Wealth LLC 1.10% of their portfolio | 26.2k $270.5k | Reduced -5.0k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 25.6k $265.5k | New |
| MetLife Investment Management, LLC 0.00% of their portfolio | 24.9k $257.0k | New |
| TritonPoint Partners, LLC 0.02% of their portfolio | 24.5k $252.9k | Unchanged |
| Concurrent Investment Advisors, LLC 0.00% of their portfolio | 24.0k $247.4k | Reduced -251 |
| Virtu Financial LLC 0.01% of their portfolio | 23.8k $246.0k | Reduced -24.3k |
| Invesco Ltd. 0.00% of their portfolio | 22.3k $230.1k | New |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 22.1k $227.8k | Added +2.4k |
| Quent Capital, LLC 0.01% of their portfolio | 20.0k $206.2k | New |
| GSA CAPITAL PARTNERS LLP 0.01% of their portfolio | 19.9k $205.0k | Added +2.1k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 19.6k $205.3k | Added +17.0k |
| Engineers Gate Manager LP 0.00% of their portfolio | 17.8k $183.8k | New |
| DRW Securities, LLC 0.01% of their portfolio | 16.4k $169.1k | New |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 14.4k $148.5k | New |
| State of Wyoming 0.01% of their portfolio | 13.6k $140.1k | New |
| Scientech Research LLC 0.11% of their portfolio | 13.5k $139.4k | New |
| Kera Capital Partners, Inc. 0.01% of their portfolio | 13.0k $134.0k | Unchanged |
| COMMONWEALTH EQUITY SERVICES, LLC 0.00% of their portfolio | 12.8k $132.2k | Unchanged |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 12.1k $124.9k | New |
| Magnetar Financial LLC 0.00% of their portfolio | 11.0k $112.9k | New |
| Mathes Company, Inc. 0.03% of their portfolio | 10.7k $110.0k | Unchanged |
| LPL Financial LLC 0.00% of their portfolio | 10.6k $108.8k | New |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 10.0k $103.1k | Unchanged |
| Everhart Financial Group, Inc. 0.01% of their portfolio | 10.0k $103.1k | New |
| Snowden Capital Advisors LLC 0.00% of their portfolio | 10.0k $103.1k | Unchanged |
| STRS OHIO 0.00% of their portfolio | 8.1k $83.5k | New |
| Allworth Financial LP 0.00% of their portfolio | 7.2k $74.7k | Unchanged |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 6.3k $64.7k | Added +3.5k |
| COMPASS FINANCIAL MANAGEMENT LLC 0.01% of their portfolio | 6.0k $56.0k | First filing |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 4.0k $41.2k | Unchanged |
| Legal & General Group Plc 0.00% of their portfolio | 4.0k $41.1k | New |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 3.8k $39.3k | Reduced -444 |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 3.7k $38.4k | New |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 3.3k $33.9k | New |
| US BANCORP \DE\ 0.00% of their portfolio | 3.1k $32.4k | New |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 2.9k $30.2k | New |