Butterfly Network, Inc. Class A (BFLY)
BFLY moved a median of -0.17% 30 minutes after news, and 0.00% by the close. How BFLY actually reacts to news — the realized, point-in-time move the market made, measured across 399 labeled events over the last three years with zero look-ahead.
BFLY’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 48% | 398 |
| 30-min | -0.17% | 46% | 398 |
| 60-min | 0.00% | 48% | 398 |
| to close | 0.00% | 48% | 397 |
| Middle 50% of BFLY reactions | -1.60% to +2.02% |
|---|---|
| Median reaction (30-min) | -0.17% |
| Measured reactions | 399 |
Half of all Butterfly Network, Inc. Class A news events land between -1.60% and +2.02% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How BFLY reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Coverage initiations | 12 | -0.26% | 42% | +0.37% |
| Rating reiterations | 10 | +0.72% | 70% | +0.63% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 4 further classes were observed with fewer than 10 measured events and are not published. See how BFLY ranks against every other measured name →
That’s how BFLY usually reacts — get an email when it moves on news →Email me when BFLY moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to BFLY's baseline. Nothing else.
Recent BFLY events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| The Edward Via College of Osteopathic Medicine (VCOM) and Butterfly Network Announce Long-Term Alliance to Build New Model for Ultrasound Education | Press release | Business Wire | -0.71% | -4.71% | |
| Butterfly Network to Report Third Quarter 2026 Financial Results on October 29, 2026 | Press release | Business Wire | -0.86% | -0.99% | |
| Bridge Neurotech and Butterfly Network Announce Partnership to Develop Fully Non-Invasive Brain-Computer Interface | Press release | Business Wire | +1.43% | -1.78% | |
| Butterfly Network Appoints Mike Noonen to Board of Directors | Press release | Business Wire | -1.30% | +5.87% | |
| Form 8-K Butterfly Network, Inc. For: Sep 29 | SEC filing · Form 8-K | SEC EDGAR | -1.30% | +5.87% | |
| Mendaera’s Focalist™ System Now Compatible with Butterfly’s Ultrasound-on-Chip™ Technology | Press release | Business Wire | -2.06% | -4.59% | |
| Butterfly Network to Participate in Morgan Stanley 24th Annual Global Healthcare Conference on September 15, 2026 | Press release | Business Wire | -1.17% | -0.67% | |
| Merge Labs and Butterfly Network Partner to Advance Ultrasound-Based Brain-Computer Interfaces | Press release | Business Wire | +1.31% | +2.25% | |
| Butterfly Network Congratulates Dr. Erica Schwartz on Confirmation as CDC Director | Press release | Business Wire | -0.21% | -3.00% | |
| Form 8-K Butterfly Network, Inc. For: Aug 05 | SEC filing · Form 8-K | SEC EDGAR | -0.21% | -3.00% | |
| Butterfly Network Reports Second Quarter 2026 Financial Results | Press release | Business Wire | +6.38% | +21.22% | |
| Form 10-Q Butterfly Network, Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +6.38% | +21.22% | |
| Form 8-K Butterfly Network, Inc. For: Jul 30 | SEC filing · Form 8-K | SEC EDGAR | +6.38% | +21.22% | |
| Science Corp. Names Nevada Sanchez as Executive Vice President of Engineering | Press release | Business Wire | +0.40% | -5.02% | |
| Butterfly Network to Report Second Quarter 2026 Financial Results on July 30, 2026 | Press release | Business Wire | -2.56% | -3.58% | |
| Butterfly Network Expands its Handheld Ultrasound Availability into Brazil | Press release | Business Wire | +0.50% | -3.52% | |
| Butterfly Network’s Embedded™ Partner Aleph Neuro Unveils Stunning Brain Images | Press release | Business Wire | +0.75% | +10.85% | |
| Form 8-K Butterfly Network, Inc. For: Jun 18 | SEC filing · Form 8-K | SEC EDGAR | +2.99% | +9.10% | |
| Butterfly Network Provides Commentary on Midjourney Medical’s Full Body Ultrasound Scanner Announcement | Press release | Business Wire | -0.27% | +18.98% | |
| Butterfly Network to Participate in TD Cowen’s Medical Devices Emerging Growth Call Series on June 18, 2026 | Press release | Business Wire | -1.60% | +2.34% | |
| Butterfly Network to Participate in the William Blair 46th Annual Growth Stock Conference | Press release | Business Wire | +1.00% | -1.11% | |
| Butterfly Network Appoints Caroll H. Neubauer to Board of Directors | Press release | Business Wire | -0.36% | -0.72% | |
| Form 8-K Butterfly Network, Inc. For: May 04 | SEC filing · Form 8-K | SEC EDGAR | -0.36% | -0.72% | |
| Butterfly Network to Present at the Bank of America Securities 2026 Global Healthcare Conference | Press release | Business Wire | +0.44% | -7.42% | |
| Butterfly Network Reports First Quarter 2026 Financial Results | Press release | Business Wire | -8.17% | +3.01% | |
| Form 10-Q Butterfly Network, Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -8.17% | +3.01% | |
| Form 8-K Butterfly Network, Inc. For: Apr 30 | SEC filing · Form 8-K | SEC EDGAR | -8.17% | +3.01% | |
| Form ARS Butterfly Network, Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -0.14% | -4.62% | |
| Form DEF 14A Butterfly Network, Inc. For: Jun 18 | SEC filing · Form DEF | SEC EDGAR | -0.14% | -4.62% | |
| Form DEFA14A Butterfly Network, Inc. | SEC filing · Form DEFA14A | SEC EDGAR | -0.14% | -4.62% | |
| Butterfly Network Appoints Arun Nagdev, MD as Chief Medical Officer – POCUS | Press release | Business Wire | -0.71% | -1.09% | |
| Butterfly Network to Report First Quarter 2026 Financial Results on April 30, 2026 | Press release | Business Wire | +0.33% | +6.44% | |
| Butterfly Network Secures First FDA Clearance for Blind Sweep Ultrasound AI Tool, Marking a Major Stride for Women’s Health | Press release | Business Wire | -0.50% | -3.77% | |
| Butterfly Network Appoints David Horsley as Senior Vice President, Innovation – Butterfly Embedded™ | Press release | Business Wire | -0.27% | +0.00% | |
| Form 10-K Butterfly Network, Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -2.77% | -19.36% | |
| Form S-8 Butterfly Network, Inc. | SEC filing · Form S-8 | SEC EDGAR | -2.77% | -19.36% | |
| Butterfly Network Reports Fourth Quarter 2025 Financial Results | Press release | Business Wire | +14.79% | +17.04% | |
| Form 8-K Butterfly Network, Inc. For: Feb 26 | SEC filing · Form 8-K | SEC EDGAR | +14.79% | +17.04% | |
| Butterfly Network to Participate at TD Cowen 46th Annual Health Care Conference on March 3, 2026 | Press release | Business Wire | +1.83% | +1.33% | |
| Butterfly Network Achieves GovRAMP and TX-RAMP Information Security Certifications | Press release | Business Wire | -1.61% | +0.00% | |
| Butterfly Network to Report Fourth Quarter and Full Year 2025 Financial Results on February 26, 2026 | Press release | Business Wire | -1.15% | +0.77% | |
| Form 8-K Butterfly Network, Inc. For: Jan 13 | SEC filing · Form 8-K | SEC EDGAR | -3.16% | -7.89% | |
| Butterfly Network Reports Preliminary, Unaudited Fourth Quarter 2025 Revenue Growth of at least 17% Year over Year | Press release | Business Wire | +1.94% | +3.39% | |
| Form 8-K Butterfly Network, Inc. For: Jan 12 | SEC filing · Form 8-K | SEC EDGAR | +1.94% | +3.39% | |
| Butterfly Network to Extend its Proprietary 3D Imaging Capabilities to Butterfly Garden Developers | Press release | Business Wire | +0.91% | +5.73% | |
| Butterfly Network to Present at the 44th Annual J.P. Morgan Healthcare Conference | Press release | Business Wire | +6.31% | +3.60% | |
| From Hype to P&L: Hospitals Now Buying AI That Pays | Press release | GlobeNewswire | -0.31% | -1.72% | |
| Butterfly Network to Participate at the 8th Annual Evercore Healthcare Conference | Press release | Business Wire | +0.21% | +11.81% | |
| Form 8-K Butterfly Network, Inc. For: Nov 17 | SEC filing · Form 8-K | SEC EDGAR | +2.36% | +5.24% | |
| Butterfly Network Launches Compass AI to Power the Next Generation of POCUS Program Management | Press release | Business Wire | -0.48% | -5.29% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the BFLY section they belong to.
Where else BFLY is measured.
BFLY earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Butterfly Network, Inc. Class A's median reaction calculated?
Every labeled BFLY news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 399 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 46% of BFLY's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does BFLY's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.