PEN Penumbra, Inc.

Last close: 319.21
504-day return: +36.82%
Median $/day: $117.8M
Relationships shown: 11
Leader rank: #601

together opposite · bar = ρ at each lag, −10 … 0 … +10 days · holdout ρ · click a card for the full picture

PEN vs BSX

Both indexed to 100 at 2026-05-11.

PEN BSX · range 78–108 · 2026-05-11 → 2026-11-06

Follows PEN

These tend to repeat PEN's moves later.

SSD Simpson Manufacturing Co., Inc.

lag 1dρ -0.21holdout -0.19stable 75%$/day $44.0Mrobust

RGCO RGC Resources Inc. Common Stock

lag 1dρ -0.20holdout -0.04stable 62%$/day $228kmoderate

Moves with PEN

Same day, ranked by what's left after the market and sector factors are removed ("beyond mkt").

BSX Boston Scientific Corp.

ρ +0.53beyond mkt +0.45holdout +0.90stable 100%robust

IHI iShares U.S. Medical Devices ETF

ρ +0.55beyond mkt +0.43holdout +0.69stable 100%robust

XHE State Street SPDR S&P Health Care Equipment ETF

ρ +0.49beyond mkt +0.34holdout +0.59stable 100%robust

PODD Insulet Corporation Common Stock

ρ +0.44beyond mkt +0.32holdout +0.50stable 100%robust

MMSI Merit Medical Systems, Inc. Common Stock

ρ +0.44beyond mkt +0.28holdout +0.62stable 100%robust

ISRG Intuitive Surgical, Inc. Common Stock

ρ +0.42beyond mkt +0.27holdout +0.49stable 100%robust

Weekly, not daily

No day-to-day relationship, but 5- or 10-day returns move together.

COMP Compass, Inc.

horizon 10dρ +0.39holdout +0.28stable 88%robust

RGLD Royal Gold, Inc. Common Stock

horizon 10dρ +0.39holdout +0.21stable 62%moderate

OPCH Option Care Health, Inc. Common Stock

horizon 10dρ +0.38holdout +0.42stable 88%robust

Changed this quarter

Biggest shifts in same-day correlation over the last 63 trading days versus the year before.

NGS Natural Gas Services Group, Inc.

Δ -0.62recent -0.35prior +0.27beyond mkt +0.15

AROC Archrock Inc

Δ -0.55recent -0.33prior +0.23beyond mkt +0.04

MTRN Materion Corporation

Δ -0.53recent -0.32prior +0.21beyond mkt -0.01

MSM MSC Industrial Direct Co., Inc. Class A

Δ -0.52recent -0.21prior +0.31beyond mkt +0.10

OBE Obsidian Energy Ltd.

Δ -0.49recent -0.43prior +0.06beyond mkt -0.02

MEOH Methanex Corporation Common Stock

Δ -0.48recent -0.38prior +0.10beyond mkt -0.00

Hidden links

Strong beyond-the-market co-movement with few shared neighbours.

Symbol	beyond mkt	raw ρ	shared	isolation
IHI iShares U.S. Medical Devices ETF	+0.43	+0.55	18
BSX Boston Scientific Corp.	+0.45	+0.53	19