Biggest short-interest movers, November 5, 2026: Fervo Energy leads the builds, Ambu tops Europe

US

Short sellers added most to Fervo Energy (FRVO): short interest rose 2.9 points in a session to 15.3% of free float, the highest reading in at least a year, and is up 4.1 points on the week, while the stock lost 13.3% over the week.

The largest cover was in Kailera Therapeutics (KLRA), where short interest fell 2.6 points to 12.9%, while the stock lost 9.2% over the week.

Across the 2165 US stocks above $1B we track, short interest rose in 1127 and fell in 1022.

BKV 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
Fervo Energy Company	FRVO	15.3%	+2.9 pts	+4.1 pts	3.1	1.40%
BKV Corporation	BKV	39.2%	+2.4 pts	+2.0 pts	6.1	0.52%
Kodiak Sciences Inc.	KOD	23.0%	+1.9 pts	+2.1 pts	7.8	0.37%
Vistance Networks, Inc.	VISN	24.6%	+1.8 pts	+0.44 pts	8.8	0.99%
Quantinuum Inc.	QNT	21.6%	+1.7 pts	+1.8 pts	3.1	0.85%
Wolfspeed, Inc.	WOLF	88.9%	+1.4 pts	+0.06 pts	7.4	2.03%
Bullish	BLSH	16.2%	+1.4 pts	-0.52 pts	4.8	0.70%
GPGI, Inc.	GPGI	20.7%	+1.4 pts	+0.97 pts	18.2	0.68%
TIC Solutions, Inc.	TIC	22.6%	+1.2 pts	+0.99 pts	14.5	0.37%
Madrigal Pharmaceuticals, Inc.	MDGL	18.0%	+1.2 pts	+1.8 pts	4.7	0.38%

Biggest short-interest covers: US

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
Kailera Therapeutics, Inc.	KLRA	12.9%	-2.6 pts	-1.3 pts	6.9	0.80%
Murphy USA Inc.	MUSA	6.2%	-2.2 pts	+0.40 pts	3.6	0.45%
Valvoline Inc.	VVV	11.0%	-1.6 pts	-0.67 pts	5.3	0.43%
Biglari Holdings Inc.	BH	25.6%	-1.2 pts	-1.3 pts	1.9	1.23%
Ethos Technologies Inc.	LIFE	14.3%	-1.1 pts	-1.5 pts	2.2	1.02%
Kimberly-Clark Corporation	KMB	5.8%	-0.94 pts	-2.8 pts	5.4	0.46%
Kardigan, Inc.	KARD	11.0%	-0.86 pts	-0.64 pts	10.6	1.94%
Madison Air Solutions Corporation	MAIR	10.1%	-0.83 pts	-0.85 pts	4.2	0.49%
Tango Therapeutics, Inc.	TNGX	39.3%	-0.77 pts	+0.34 pts	10.5	0.55%
PennyMac Financial Services, Inc.	PFSI	13.6%	-0.68 pts	+0.18 pts	5.5	0.53%

Europe

Short sellers added most to Ambu (AMBU B): short interest rose 2.8 points in a session to 10.6% of free float, against a one-year high of 13.9%, while the stock gained 13.9% over the week.

The largest cover was in Ithaca Energy (ITH), where short interest fell 1.4 points to 0.1%, while the stock lost 18.5% over the week.

Across the 1071 European stocks above $1B we track, short interest rose in 368 and fell in 395.

Biggest short-interest builds: Europe

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
Ambu A/S	AMBU B	10.6%	+2.8 pts	+2.8 pts	24.3	0.82%
Dunelm Group plc	DNLM	4.5%	+2.1 pts	+2.2 pts	11.3	0.60%
GN Store Nord A/S	GN	10.4%	+2.1 pts	+2.3 pts	25.2	1.61%
Pandora A/S	PNDORA	4.8%	+1.4 pts	+0.67 pts	12.1	0.67%
Ipsen S.A.	IPN	1.5%	+0.81 pts	+0.92 pts	3.7	0.65%
freenet AG	FNTN	2.6%	+0.81 pts	+0.81 pts	9.5	0.68%
Zalando SE	ZAL	6.9%	+0.80 pts	+0.78 pts	11.7	0.73%
OVH Groupe S.A.	OVH	0.8%	+0.75 pts	+0.71 pts	0.8	2.92%
Renault SA	RNO	21.0%	+0.73 pts	-0.18 pts	19.5	0.78%
Ayvens	AYV	11.1%	+0.71 pts	+1.6 pts	13.7	0.68%

Biggest short-interest covers: Europe

Company	Ticker	SI % free float	1-day change	1-week change	Days to cover	Cost to borrow
Ithaca Energy plc	ITH	0.1%	-1.4 pts	-1.4 pts	0.1	0.60%
PPI Public Property Invest AB (publ)	PUBLI	0.6%	-1.2 pts	+0.13 pts	2.0	3.52%
Nordex SE	NDX1	5.5%	-0.83 pts	-0.83 pts	11.1	0.67%
Solvay SA	SOLB	11.1%	-0.81 pts	-0.81 pts	16.8	0.84%
AUTO1 Group SE	AG1	21.0%	-0.76 pts	-0.40 pts	56.4	1.29%
International Workplace Group plc	IWG	8.7%	-0.73 pts	-0.93 pts	9.4	0.55%
Saipem SpA	SPM	20.8%	-0.63 pts	+0.32 pts	16.7	0.71%
Bonesupport Holding AB (publ)	BONEX	5.1%	-0.55 pts	-1.1 pts	5.9	0.90%
Okeanis Eco Tankers Corp.	OET	3.8%	-0.54 pts	+0.52 pts	7.2	1.60%
Koninklijke Philips N.V.	PHIA	0.3%	-0.53 pts	-1.0 pts	1.2	0.66%