Stocks › Biotechnology › MLTX

MoonLake Immunotherapeutics MLTX

US equityMarket cap rank #3298Biotechnology

$10.77 −$0.18 (-1.64%)

Pre-market · Oct 8, 8:50 am ET · After hours $10.96 +1.76%

Open$10.81

Prev close$10.95

Day range$10.71 – $11.29

Volume1.40M

Market cap$916.60M

P/E (TTM)–

Dividend yield–

Ownership & positioning

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

Institutional ownership87.4%-1.51 pts vs. prior quarter

Institutions holding205+2 vs. prior quarter

Insider trades (recent)23 buys / 27 sellsNet selling

Short interest10.51% of floatDays to cover 6.1 · as of 15 Sep 2026

Short-sale volume share11.4%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: −$17.61M (5 inflow days, 15 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 41.0% of shares outstanding.

Largest holders

BVF Partners L.P.18.80%
Deep Track Capital, LP8.22%
T. Rowe Price Group, Inc.6.25%
D. E. Shaw & Co., L.P.3.95%
Cormorant Asset Management, LP3.77%
Janus Henderson Group plc3.63%
Jorge da Silva3.26%
Kristian Reich3.23%

By investor type

Hedge Fund48.97%
Mutual Fund18.27%
VC/PE Fund13.09%
Individual/Insider7.80%
Private Company3.95%
Public Company2.96%
Government Pension Fund0.11%
Insurance Company0.05%

Reported short interest has risen from 7.94% to 10.51% 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
T. Rowe Price Group, Inc.	Mutual Fund	2026/Q3	+4,027,290	6.3%
Logos Global Management, L.P.	Hedge Fund	2026/Q3	+1,175,000	3.1%
D. E. Shaw & Co., L.P.	Hedge Fund	2026/Q3	+974,846	4.0%
Weiss Asset Management, LLC	Hedge Fund	2026/Q3	+873,485	3.0%
Trails Edge Capital Partners, LP	Hedge Fund	2026/Q3	+750,000	0.9%
Arrowstreet Capital, Limited Partnership	Mutual Fund	2026/Q3	+680,637	0.9%
Citadel Advisors LLC	Hedge Fund	2026/Q3	+649,165	2.3%
Two Sigma Investments, LP	Hedge Fund	2026/Q3	+593,037	2.0%
Deep Track Capital, LP	VC/PE Fund	2026/Q3	+590,162	8.2%
Qube Research & Technologies Ltd	Mutual Fund	2026/Q3	+453,325	0.6%
Marshall Wace LLP	Hedge Fund	2026/Q3	+439,020	0.6%
Vivo Capital, LLC	VC/PE Fund	2026/Q3	+400,000	1.6%
Jane Street Group, LLC	Private Company	2026/Q3	+399,761	1.0%
Capricorn Fund Managers Limited	Hedge Fund	2026/Q3	+374,866	0.4%
Renaissance Technologies Corp.	Hedge Fund	2026/Q3	+366,496	0.8%

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

Insider transactions

Date	Insider	Title	Transaction	Shares	Price	Held after
26 Jul 2026	Kristian Reich	Co-Founder & CSO	Automatic Disposition	-1,100	$20.00	2,746,587
21 Jul 2026	Kristian Reich	Co-Founder & CSO	Automatic Disposition	-52,448	$20.02	2,747,687
19 Jul 2026	Kristian Reich	Co-Founder & CSO	Automatic Disposition	-43,700	$20.09	2,800,135
14 Jul 2026	Kristian Reich	Co-Founder & CSO	Automatic Disposition	-16,105	$20.01	2,843,835
9 Jul 2026	Jorge da Silva	Chief Executive Officer	Automatic Disposition	-102,225	$20.02	2,774,893
30 Jun 2026	Jorge da Silva	Chief Executive Officer	Automatic Disposition	-47,775	$20.03	2,877,118
29 Jun 2026	Jorge da Silva	Chief Executive Officer	Intent to Sell (Form 144)	-150,000	$20.03	–
21 Jun 2026	Matthias Bodenstedt	Chief Financial Officer	Automatic Disposition	-39,120	$22.04	1,115,435
17 Jun 2026	Matthias Bodenstedt	Chief Financial Officer	Automatic Disposition	-17,876	$19.68	1,154,555
16 Jun 2026	BVF Partners L.P.		Other Derivative Acquisition	+22,195	$19.19	22,195
16 Jun 2026	Catherine Moukheibir	Independent Director	Other Derivative Acquisition	+22,195	$19.19	22,195
16 Jun 2026	Andrew Phillips	Independent Director	Other Derivative Acquisition	+22,195	$19.19	22,195
16 Jun 2026	Ramnik Xavier	Independent Director	Other Derivative Acquisition	+22,195	$19.19	22,195
16 Jun 2026	Spike Loy	Independent Director	Other Derivative Acquisition	+22,195	$19.19	22,195
16 Jun 2026	Kristian Reich	Co-Founder & CSO	Automatic Disposition	-150,000	$19.43	2,859,940
14 Jun 2026	Kristian Reich	Co-Founder & CSO	Intent to Sell (Form 144)	-150,000	$19.00	–
10 May 2026	Matthias Bodenstedt	Chief Financial Officer	Automatic Disposition	-13,653	$20.02	1,172,431
13 Apr 2026	Matthias Bodenstedt	Chief Financial Officer	Automatic Disposition	-2,426	$19.56	1,186,084
12 Apr 2026	Jorge da Silva	Chief Executive Officer	Open Market Disposition	-150,000	$18.41	2,924,893
9 Apr 2026	Matthias Bodenstedt	Chief Financial Officer	Automatic Disposition	-87,795	$19.51	1,188,510

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	8,947,906	10.5%	6.1
31 Aug 2026	7,144,513	8.4%	6.7
14 Aug 2026	6,819,147	8.0%	4.2
31 Jul 2026	5,721,976	6.9%	6.6
15 Jul 2026	6,334,566	7.7%	5.0
30 Jun 2026	6,557,634	7.9%	3.5

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