Biggest short-interest movers, November 9, 2026: OPKO Health leads the builds, OVH Groupe tops Europe

US

Short sellers added most to OPKO Health (OPK): short interest rose 3.0 points in a session to 14.6% of free float, the highest reading in at least a year, and is up 3.5 points on the week.

The largest cover was in ChronoScale (CHRN), where short interest fell 3.3 points to 17.1%, while the stock lost 10.8% over the week.

Across the 2178 US stocks above $1B we track, short interest rose in 1086 and fell in 1073.

BRVE 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
OPKO Health, Inc.	OPK	14.6%	+3.0 pts	+3.5 pts	7.2	0.48%
Jersey Mike's Subs Inc.	JMKE	31.1%	+2.8 pts	+2.0 pts	4.5	5.48%
Bowhead Specialty Holdings Inc.	BOW	9.1%	+2.3 pts	+4.1 pts	8.8	0.53%
Rollins, Inc.	ROL	10.7%	+1.5 pts	+1.8 pts	4.3	0.52%
Accelevation Holdings Corp.	ACCV	12.8%	+1.3 pts	+3.1 pts	2.6	3.33%
Braveheart Bio, Inc.	BRVE	47.5%	+1.3 pts	+5.2 pts	15.3	10.36%
Columbia Financial, Inc.	CLBK	11.1%	+1.3 pts	+2.0 pts	8.8	0.51%
Artivion, Inc.	AORT	9.2%	+1.1 pts	+0.84 pts	5.6	0.50%
Dorian LPG Ltd.	LPG	5.6%	+1.1 pts	+1.3 pts	3.7	0.49%
Ameresco, Inc.	AMRC	17.4%	+1.0 pts	+1.5 pts	8.7	0.53%

Biggest short-interest covers: US

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
ChronoScale Holdings Corporation	CHRN	17.1%	-3.3 pts	-2.9 pts	4.2	22.06%
Septerna, Inc.	SEPN	11.7%	-2.7 pts	+0.10 pts	8.4	0.51%
Kodiak Sciences Inc.	KOD	21.1%	-2.2 pts	+0.13 pts	7.4	0.39%
Eagle Bancorp, Inc.	EGBN	12.4%	-1.5 pts	-0.42 pts	6.1	0.46%
Bullish	BLSH	13.8%	-1.5 pts	-1.6 pts	3.9	0.66%
BKV Corporation	BKV	41.3%	-1.4 pts	+3.6 pts	6.0	0.51%
Weatherford International plc	WFRD	6.4%	-1.3 pts	+0.40 pts	3.8	0.52%
First Commonwealth Financial Corporation	FCF	5.2%	-1.3 pts	+0.99 pts	6.1	0.41%
RingCentral, Inc.	RNG	9.9%	-1.2 pts	+1.1 pts	4.1	0.46%
Scholar Rock Holding Corporation	SRRK	21.8%	-1.2 pts	-0.28 pts	13.5	0.46%

Europe

Short sellers added most to OVH Groupe (OVH): short interest rose 1.0 points in a session to 2.9% of free float, against a one-year high of 12.5%, and is up 2.8 points on the week, while the stock gained 12.4% over the week.

The largest cover was in Bittium (BITTI), where short interest fell 1.6 points to 1.5%, while the stock lost 5.1% over the week.

Across the 1069 European stocks above $1B we track, short interest rose in 356 and fell in 432.

OVH and AYV 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
OVH Groupe S.A.	OVH	2.9%	+1.0 pts	+2.8 pts	2.6	3.82%
Ayvens	AYV	12.2%	+0.57 pts	+2.9 pts	15.1	0.69%
Glanbia plc	GL9	0.7%	+0.50 pts	+0.45 pts	2.5	0.36%
RENK Group AG	R3NK	9.9%	+0.48 pts	+0.83 pts	15.1	1.47%
Ariston Holding N.V.	ARIS	2.4%	+0.48 pts	+0.45 pts	3.1	0.68%
CSG N.V.	CSG	7.3%	+0.45 pts	+1.0 pts	15.5	1.63%
J Sainsbury plc	SBRY	9.4%	+0.42 pts	-0.18 pts	17.8	0.60%
Pennon Group Plc	PNN	7.8%	+0.42 pts	-0.95 pts	14.3	0.61%
Poste Italiane S.p.A.	PST	2.2%	+0.41 pts	+1.2 pts	6.0	0.80%
Banca Mediolanum S.p.A.	BMED	3.2%	+0.40 pts	+1.2 pts	10.1	1.05%

Biggest short-interest covers: Europe

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
Bittium Oyj	BITTI	1.5%	-1.6 pts	-2.1 pts	3.7	4.99%
GN Store Nord A/S	GN	7.8%	-1.3 pts	-0.36 pts	17.6	1.60%
Hufvudstaden AB (publ)	HUFV A	4.8%	-1.1 pts	-1.7 pts	8.0	0.87%
Wizz Air Holdings Plc	WIZZ	10.6%	-0.88 pts	-1.1 pts	11.9	4.33%
Ambu A/S	AMBU B	8.6%	-0.81 pts	+1.2 pts	19.5	0.81%
TUI AG	TUI1	7.9%	-0.81 pts	-0.90 pts	11.4	0.80%
Tenaris S.A.	TEN	0.9%	-0.72 pts	-0.74 pts	2.2	0.81%
Renault SA	RNO	20.2%	-0.69 pts	+0.11 pts	20.0	0.78%
Coca-Cola HBC AG	CCH	1.9%	-0.56 pts	-0.18 pts	3.8	1.92%
AUTO1 Group SE	AG1	19.8%	-0.50 pts	-2.1 pts	51.7	1.26%