Stocks › Biotechnology › IMMX

Immix Biopharma IMMX

US equityMarket cap rank #3420Biotechnology

$9.49 −$0.15 (-1.56%)

Pre-market · Oct 8, 8:50 am ET · After hours $9.49 0.00%

Open$9.50

Prev close$9.64

Day range$9.40 – $9.69

Volume1.38M

Market cap$788.42M

P/E (TTM)–

Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership74.8%-11.95 pts vs. prior quarter

Institutions holding136+2 vs. prior quarter

Insider trades (recent)47 buys / 0 sellsNet buying

Short interest13.45% of floatDays to cover 7.8 · as of 15 Sep 2026

Short-sale volume share21.7%5-day average of daily volume

Short-sale volume as % of daily volume

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$780.9K (11 inflow days, 9 outflow days).

Net flow by order size, last 20 sessions

Super/Big orders approximate institutional-size trades; Mid/Small approximate retail-size trades. Net buy minus sell value in each bucket, summed over the window.

The five largest holders on file together own 30.7% of shares outstanding.

Largest holders

Janus Henderson Group plc11.80%
Saturn V Capital Management LP5.62%
Veritas Liberabit Vos, LLC4.72%
Eventide Asset Management, LLC4.69%
Yekaterina Chudnovsky3.91%
State Street Global Advisors3.61%
BlackRock3.61%
Vanguard Capital Management, LLC3.51%

By investor type

Mutual Fund42.39%
Hedge Fund17.60%
VC/PE Fund8.53%
Individual/Insider8.20%
Private Company5.22%
Public Company0.84%
Insurance Company0.11%
Government Pension Fund0.04%

Reported short interest has risen from 11.07% to 13.45% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Recent institutional activity

Holder	Type	Period	Share change	New stake
Janus Henderson Group plc	Mutual Fund	2026/Q3	+4,981,190	11.8%
State Street Global Advisors	Mutual Fund	2026/Q3	+2,805,025	3.6%
Deep Track Capital, LP	VC/PE Fund	2026/Q3	+2,775,000	3.3%
BlackRock	Mutual Fund	2026/Q3	+2,521,595	3.6%
Opaleye Management Inc.	Hedge Fund	2026/Q3	+2,345,000	2.8%
UBS Asset Management	Mutual Fund	2026/Q3	+1,864,985	2.3%
Wellington Management Group	Mutual Fund	2026/Q3	+1,473,409	1.8%
Eventide Asset Management, LLC	Mutual Fund	2026/Q3	+1,342,000	4.7%
T. Rowe Price Group, Inc.	Mutual Fund	2026/Q3	+1,324,918	2.1%
Saturn V Capital Management LP	Hedge Fund	2026/Q3	+964,844	5.6%
Great Point Partners, LLC	VC/PE Fund	2026/Q3	+927,642	1.5%
Vanguard Capital Management, LLC	Mutual Fund	2026/Q3	+872,246	3.5%
Geode Capital Management, LLC	Mutual Fund	2026/Q3	+737,713	1.4%
Citadel Advisors LLC	Hedge Fund	2026/Q3	+458,984	0.6%
Balyasny Asset Management L.P.	Hedge Fund	2026/Q3	+417,227	0.5%

Institutional buy/sell activity by reporting period, largest moves first.

Insider transactions

Date	Insider	Title	Transaction	Shares	Price	Held after
21 May 2026	Nancy Chang	Director	Other Acquisition	+6,250	–	6,250
21 May 2026	Nancy Chang	Director	Other Derivative Acquisition	+12,500	$8.78	12,500
21 May 2026	Jane Buchan	Independent Director	Other Acquisition	+6,250	–	6,250
21 May 2026	Jane Buchan	Independent Director	Other Derivative Acquisition	+12,500	$8.78	12,500
21 May 2026	Jason Hsu	Director	Other Acquisition	+6,250	–	6,250
21 May 2026	Jason Hsu	Director	Other Derivative Acquisition	+12,500	$8.78	12,500
21 May 2026	Magda Marquet	Independent Director	Other Acquisition	+6,250	–	6,250
21 May 2026	Magda Marquet	Independent Director	Other Derivative Acquisition	+12,500	$8.78	12,500
21 May 2026	Helen Adams	Independent Director	Other Acquisition	+6,250	–	6,250
21 May 2026	Helen Adams	Independent Director	Other Derivative Acquisition	+12,500	$8.78	12,500
21 May 2026	Carey Ng	Independent Director	Other Acquisition	+6,250	–	6,250
21 May 2026	Carey Ng	Independent Director	Other Derivative Acquisition	+12,500	$8.78	12,500
21 May 2026	Ilya Rachman	Chairperson & CEO	Other Derivative Acquisition	+500,000	$8.78	500,000
21 May 2026	Gabriel Morris	Chief Financial Officer	Other Derivative Acquisition	+500,000	$8.78	500,000
21 May 2026	Yekaterina Chudnovsky	Director	Other Acquisition	+6,250	–	6,250
21 May 2026	Yekaterina Chudnovsky	Director	Other Derivative Acquisition	+12,500	$8.78	12,500
9 Dec 2025	Ilya Rachman	Chairperson & CEO	Open Market Acquisition	+746	$6.67	1,141,683
9 Dec 2025	Gabriel Morris	Chief Financial Officer	Open Market Acquisition	+770	$6.58	291,429
7 Dec 2025	Alwaysraise LLC		Derivative Exercise and Retained	+156,000	$0.80	450,985
20 Nov 2025	Nancy Chang	Director	Other Derivative Acquisition	+39,643	$4.33	39,643

From Form 4/Form 144 filings. Negative share counts are disposals (sales, gifts, or shares withheld for taxes); positive are acquisitions.

Short interest, by report

Report date	Shares short	% of float	Days to cover
15 Sep 2026	9,621,660	13.4%	7.8
31 Aug 2026	9,616,997	13.4%	5.9
14 Aug 2026	10,357,703	14.5%	7.0
31 Jul 2026	9,492,705	13.3%	5.2
15 Jul 2026	8,501,228	11.9%	4.6
30 Jun 2026	7,881,944	11.1%	2.7

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