Biggest short-interest movers, October 28, 2026: ChronoScale leads the builds, Solaria Energía y Medio Ambiente tops Europe

US

Short sellers added most to ChronoScale (CHRN): short interest rose 9.8 points in a session to 23.3% of free float, against a one-year high of 29.1%, while the stock gained 2.4% over the week.

The largest cover was in Celanese (CE), where short interest fell 2.0 points to 6.5%, while the stock gained 3.3% over the week.

Across the 2189 US stocks above $1B we track, short interest rose in 1080 and fell in 1088.

GPGI 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
ChronoScale Holdings Corporation	CHRN	23.3%	+9.8 pts	+9.2 pts	6.4	23.46%
Quantinuum Inc.	QNT	22.8%	+2.6 pts	+4.7 pts	3.3	0.84%
GPGI, Inc.	GPGI	22.0%	+2.2 pts	+1.2 pts	20.4	0.76%
Howard Hughes Holdings Inc.	HHH	17.5%	+2.0 pts	+2.9 pts	5.7	0.52%
Jersey Mike's Subs Inc.	JMKE	10.1%	+1.7 pts	-0.84 pts	4.4	1.01%
The Clorox Company	CLX	10.6%	+1.2 pts	+0.21 pts	5.3	0.55%
BKV Corporation	BKV	37.1%	+1.1 pts	-0.12 pts	5.9	0.52%
Innodata Inc.	INOD	15.0%	+0.92 pts	+0.69 pts	2.9	0.59%
Ionic Digital Inc.	IOND	4.4%	+0.90 pts	-0.38 pts	4.2	1.61%
Whirlpool Corporation	WHR	31.8%	+0.83 pts	+1.2 pts	4.2	0.71%

Biggest short-interest covers: US

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
Celanese Corporation	CE	6.5%	-2.0 pts	+0.15 pts	4.6	0.50%
THOR Industries, Inc.	THO	10.8%	-1.6 pts	+0.25 pts	5.7	0.53%
Grindr Inc.	GRND	20.5%	-1.2 pts	+6.6 pts	4.5	0.59%
Mission Produce, Inc.	AVO	11.1%	-1.1 pts	+0.05 pts	5.7	0.57%
XP Inc.	XP	5.0%	-1.0 pts	-0.12 pts	0.8	0.46%
GE Vernova Inc.	GEV	2.7%	-0.95 pts	+0.06 pts	2.5	0.35%
Pulse Biosciences, Inc.	PLSE	15.6%	-0.87 pts	-1.9 pts	8.2	1.14%
Alcoa Corporation	AA	4.7%	-0.82 pts	+0.13 pts	2.3	0.48%
Eton Pharmaceuticals, Inc.	ETON	8.1%	-0.81 pts	+0.57 pts	3.6	0.45%
Macy's, Inc.	M	14.0%	-0.80 pts	+1.1 pts	5.4	0.46%

Europe

Short sellers added most to Solaria Energía y Medio Ambiente (SLR): short interest rose 1.2 points in a session to 12.9% of free float, against a one-year high of 15.4%, and is up 2.8 points on the week, while the stock gained 3.9% over the week.

The largest cover was in Randstad (RAND), where short interest fell 3.1 points to 3.0%.

Across the 1063 European stocks above $1B we track, short interest rose in 311 and fell in 408.

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	12.9%	+1.2 pts	+2.8 pts	9.2	0.75%
Siltronic AG	WAF	5.2%	+1.1 pts	-1.3 pts	6.3	1.51%
Renault SA	RNO	21.2%	+0.98 pts	+0.40 pts	19.4	0.78%
Hochschild Mining plc	HOC	3.1%	+0.98 pts	+0.67 pts	8.3	0.58%
Davide Campari-Milano N.V.	CPR	13.1%	+0.95 pts	+4.5 pts	13.8	0.95%
Bayerische Motoren Werke Aktiengesellschaft	BMW	4.2%	+0.84 pts	+1.1 pts	10.8	0.79%
Scatec ASA	SCATC	8.2%	+0.64 pts	+2.9 pts	10.8	0.73%
Eni S.p.A.	ENI	2.2%	+0.53 pts	+0.77 pts	4.9	0.70%
Okeanis Eco Tankers Corp.	OET	2.8%	+0.46 pts	-1.7 pts	5.8	1.71%
LEG Immobilien SE	LEG	7.4%	+0.44 pts	+3.7 pts	8.7	1.06%

Biggest short-interest covers: Europe

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
Randstad N.V.	RAND	3.0%	-3.1 pts	-2.1 pts	4.5	0.77%
Bolloré SE	BOL	0.6%	-1.6 pts	-1.6 pts	2.0	1.85%
Naturgy Energy Group, S.A.	NTGY	0.1%	-0.92 pts	-1.2 pts	0.3	0.69%
Accor SA	AC	3.0%	-0.50 pts	-0.50 pts	6.8	0.72%
Pennon Group Plc	PNN	14.4%	-0.49 pts	+0.43 pts	13.5	0.73%
Grifols, S.A.	GRF	12.5%	-0.41 pts	-0.59 pts	12.8	2.19%
Rémy Cointreau SA	RCO	20.4%	-0.41 pts	-1.6 pts	50.0	1.42%
Bankinter, S.A.	BKT	0.1%	-0.39 pts	+0.08 pts	0.7	0.51%
Sodexo S.A.	SW	9.3%	-0.38 pts	-1.6 pts	18.2	0.71%
NKT A/S	NKT	8.9%	-0.34 pts	-1.8 pts	30.6	0.76%