Biggest short-interest movers, October 27, 2026: Celanese leads the builds, Solaria Energía y Medio Ambiente tops Europe

US

Short sellers added most to Celanese (CE): short interest rose 2.0 points in a session to 8.6% of free float, against a one-year high of 11.4%, and is up 2.3 points on the week, while the stock gained 2.3% over the week.

The largest cover was in Braveheart Bio (BRVE), where short interest fell 4.8 points to 36.5%, while the stock gained 7.6% over the week.

Across the 2186 US stocks above $1B we track, short interest rose in 1093 and fell in 1076.

GRND was also among the biggest builds in the previous edition.

Biggest short-interest builds: US

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
Celanese Corporation	CE	8.6%	+2.0 pts	+2.3 pts	6.0	0.50%
Grindr Inc.	GRND	21.7%	+1.3 pts	+8.0 pts	4.9	0.57%
THOR Industries, Inc.	THO	12.4%	+1.2 pts	+1.8 pts	6.6	0.57%
Pulse Biosciences, Inc.	PLSE	16.5%	+1.0 pts	-0.12 pts	8.3	1.20%
GPGI, Inc.	GPGI	19.7%	+0.95 pts	-0.51 pts	17.9	0.72%
Amkor Technology, Inc.	AMKR	10.0%	+0.75 pts	+1.4 pts	2.1	0.53%
GE Vernova Inc.	GEV	3.6%	+0.74 pts	+1.0 pts	3.6	0.40%
Globant S.A.	GLOB	21.7%	+0.73 pts	-9.3 pts	9.0	0.57%
Alcoa Corporation	AA	5.6%	+0.73 pts	+0.99 pts	2.8	0.50%
XP Inc.	XP	6.0%	+0.68 pts	+1.00 pts	1.1	0.49%

Biggest short-interest covers: US

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
Braveheart Bio, Inc.	BRVE	36.5%	-4.8 pts	-1.4 pts	12.5	8.97%
Mega Fortune Company Limited	MGRT	0.9%	-3.0 pts	+0.38 pts	3.1	59.77%
Palvella Therapeutics, Inc.	PVLA	20.1%	-1.6 pts	-2.0 pts	9.5	0.52%
Levi Strauss & Co.	LEVI	11.6%	-1.6 pts	+2.0 pts	2.0	0.47%
Hinge Health, Inc.	HNGE	9.1%	-1.5 pts	-0.88 pts	3.0	0.45%
Icahn Enterprises L.P.	IEP	35.5%	-1.0 pts	+0.47 pts	15.0	1.19%
Tandem Diabetes Care, Inc.	TNDM	25.2%	-0.84 pts	+3.2 pts	7.5	0.52%
Disc Medicine, Inc.	IRON	19.0%	-0.82 pts	+0.02 pts	4.8	0.46%
Strive, Inc.	ASST	20.9%	-0.76 pts	-3.8 pts	1.8	0.94%
MasterBrand, Inc.	MBC	12.5%	-0.73 pts	+0.02 pts	8.3	0.49%

Europe

Short sellers added most to Solaria Energía y Medio Ambiente (SLR): short interest rose 2.0 points in a session to 11.8% of free float, against a one-year high of 15.4%, while the stock gained 6.0% over the week.

The largest cover was in Unipol Assicurazioni (UNI), where short interest fell 1.6 points to 2.3%.

Across the 1060 European stocks above $1B we track, short interest rose in 353 and fell in 404.

SLR, CPR and SCATC were also among the biggest builds in the previous edition.

Biggest short-interest builds: Europe

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
Solaria Energía y Medio Ambiente, S.A.	SLR	11.8%	+2.0 pts	+1.8 pts	8.3	0.75%
Davide Campari-Milano N.V.	CPR	12.1%	+0.98 pts	+4.2 pts	12.5	1.07%
Scatec ASA	SCATC	7.6%	+0.88 pts	+2.4 pts	10.2	0.73%
Melrose Industries PLC	MRO	6.4%	+0.67 pts	+1.0 pts	15.0	0.66%
B&M European Value Retail plc	BME	7.5%	+0.65 pts	+0.82 pts	13.0	0.65%
PUMA SE	PUM	8.1%	+0.65 pts	+0.51 pts	14.0	0.71%
J Sainsbury plc	SBRY	9.6%	+0.56 pts	+0.43 pts	17.3	0.58%
Hacksaw AB (publ)	HACK	14.8%	+0.55 pts	+0.97 pts	8.6	1.12%
Norsk Hydro ASA	NHY	0.9%	+0.53 pts	+0.52 pts	2.7	0.69%
Persimmon Plc	PSN	9.8%	+0.48 pts	+0.27 pts	17.6	0.55%

Biggest short-interest covers: Europe

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
Unipol Assicurazioni S.p.A.	UNI	2.3%	-1.6 pts	-0.63 pts	4.4	0.83%
Meliá Hotels International, S.A.	MEL	0.4%	-0.95 pts	-0.95 pts	1.9	0.81%
PPI Public Property Invest AB (publ)	PUBLI	0.6%	-0.87 pts	+0.17 pts	1.9	3.53%
Saipem SpA	SPM	20.4%	-0.71 pts	+0.09 pts	17.0	0.69%
Vend Marketplaces ASA	VEND	6.4%	-0.63 pts	-0.51 pts	10.3	0.38%
Stellantis N.V.	STLAM	11.5%	-0.57 pts	+0.66 pts	6.1	1.07%
Naturgy Energy Group, S.A.	NTGY	1.0%	-0.48 pts	-0.29 pts	2.8	0.82%
Bonesupport Holding AB (publ)	BONEX	6.1%	-0.47 pts	-4.6 pts	6.9	0.82%
Vitec Software Group AB (publ)	VIT B	4.0%	-0.46 pts	-1.2 pts	12.7	0.86%
Bellway p.l.c.	BWY	3.7%	-0.44 pts	-0.24 pts	6.1	0.55%