— Why it moved
Why PLSM Stock Nearly Quadrupled Today — June 24, 2026
Ouma Health picked Pulsenmore's home ultrasound for its maternity telehealth platform, and a 1.5M-share float did the rest — then the stock spent the whole session giving it back.
What moved PLSM stock
Pulsenmore makes an FDA-authorized home ultrasound device. Ouma Health, the largest maternity telemedicine provider in the US, selected it for its virtual prenatal care platform — a real partnership, but with no financial terms disclosed.
The mechanics
The float is about 1.5 million shares on a $22M cap. When news hits something that small, price discovery breaks: it gapped 227% overnight and traded roughly 1,800 times its normal volume.
PLSM by the numbers
The alert window
Stock Pulse flagged it premarket at 7:19 AM at $11.27, after the stock had already more than tripled. Thin premarket prints touched $19.52 minutes later, but no size traded there. Where real volume showed up, the high was $12.97 just after the bell at 9:35 — 136 minutes after the alert, 15.1% above it. That was the whole window, and most of it was the wait.
How PLSM's move ended
From 9:35 it bled for six straight hours to a $6.57 close, 41.7% below the alert and half the regular-session high — anyone who chased the morning rode a halving. A partnership with no disclosed terms, on a company this small, is a headline, not revenue. And that $19.52 premarket print is the number pump accounts will quote; nobody got filled there in size.
The tell: measure these moves where the volume traded — the thinnest print and the tradeable high are two different numbers, and only one of them was ever yours.