# EDGAR Filing Document

**Accession Number:** 0001804176
**File Stem:** 0001804176-25-000011
**Filing Date:** 2025-10
**Character Count:** 22643
**Document Hash:** 418dbab34a7581af25471591375fea03
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001804176-25-000011.hdr.sgml**: 20251031

**ACCESSION NUMBER**: 0001804176-25-000011

**CONFORMED SUBMISSION TYPE**: S-8

**PUBLIC DOCUMENT COUNT**: 15

**FILED AS OF DATE**: 20251031

**DATE AS OF CHANGE**: 20251031

**EFFECTIVENESS DATE**: 20251031

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Butterfly Network, Inc.
- **CENTRAL INDEX KEY:** 0001804176
- **STANDARD INDUSTRIAL CLASSIFICATION:** X-RAY APPARATUS & TUBES & RELATED IRRADIATION APPARATUS [3844]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** S-8
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-291178
- **FILM NUMBER:** 251437931

**BUSINESS ADDRESS:**
- **STREET 1:** 1600 DISTRICT AVENUE
- **CITY:** BURLINGTON
- **STATE:** MA
- **ZIP:** 01803
- **BUSINESS PHONE:** 781-557-4800

**MAIL ADDRESS:**
- **STREET 1:** 1600 DISTRICT AVENUE
- **CITY:** BURLINGTON
- **STATE:** MA
- **ZIP:** 01803

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Longview Acquisition Corp.
- **DATE OF NAME CHANGE:** 20200220

**AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 31, 2025**

**REGISTRATION NO. 333-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**

**UNITED STATES<br>SECURITIES AND EXCHANGE COMMISSION<br>Washington, D.C. 20549** 

**____________________**

**FORM S-8<br>REGISTRATION STATEMENT UNDER<br>THE SECURITIES ACT OF 1933**

**____________________**

**Butterfly Network, Inc.**<br> (Exact name of registrant as specified in its charter)

**____________________**

---

| | |
|:---|:---|
| **Delaware**<br>(State or other jurisdiction of incorporation or organization) | **84-4618156**<br>(I.R.S. Employer Identification No.) |
| **1600 District Avenue, Burlington, MA**<br>(Address of Principal Executive Offices) | **01803**<br>(Zip Code) |

---

**Amended and Restated 2020 Equity Incentive Plan** 

**2024 Employee Stock Purchase Plan**

(Full title of the plan)

**____________________**

**Joseph M. DeVivo**

**Chief Executive Officer**

**Butterfly Network, Inc.**

**1600 District Avenue**

**Burlington, MA 01803** <br> (Name and address of agent for service)

**(781) 557-4800**<br>(Telephone number, including area code, of agent for service)

**____________________**

*Copy to:* 

**Stacie S. Aarestad<br>Ryan M. Rourke Reed**

**Foley Hoag LLP**

**155 Seaport Boulevard<br>Boston, Massachusetts 02110-2600<br>(617) 832-1000** 

**____________________**

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer | □ | Accelerated filer | □ |
| Non-accelerated filer | ⌧ | Smaller reporting company | ⌧ |
| | | Emerging growth company | □ |

---

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.

------

**EXPLANATORY NOTE**

Butterfly Network, Inc. (the "Registrant") is filing this Registration Statement on Form S-8 (this "Registration Statement") to register (i) 8,575,266 additional shares of Class A common stock, par value $0.0001 per share ("Class A Common Stock"), of the Registrant reserved under the Butterfly Network, Inc. Amended and Restated 2020 Equity Incentive Plan (the "2020 Plan"), representing an increase of shares reserved under the 2020 Plan effective January 1, 2025 by operation of the 2020 Plan's "evergreen" provision and (ii) 2,076,487 additional shares of Class A Common Stock reserved under the Butterfly Network, Inc. 2024 Employee Stock Purchase Plan (the "2024 ESPP"), representing an increase of shares reserved under the 2024 ESPP effective January 1, 2025 by operation of the 2024 ESPP's "evergreen" provision. This registration statement registers additional securities of the same class as other securities for which a registration statement filed on Form S-8 (File No. 333-256044) relating to an employee benefit plan is effective. The information contained in the Registrant's registration statements on Form S-8 filed with the Securities and Exchange Commission (the "SEC") on May 12, 2021, March 1, 2022 and June 14, 2024 (SEC File No. 333-256044, SEC File No. 333-263151 and SEC File No. 333-280218), respectively, is hereby incorporated by reference pursuant to General Instruction E of Form S-8.

**Part II**

**INFORMATION REQUIRED IN THE REGISTRATION STATEMENT**

**Item 8. Exhibits.**

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **Exhibit<br>Number** | **Description** | **Filed Herewith** | **Incorporated by Reference herein from**<br>**Form or Schedule** | **Filing Date** | **SEC File/Reg. Number** |
| 4.1 | <u>[Third Amended and Restated Certificate of Incorporation of Butterfly Network, Inc.](https://www.sec.gov/Archives/edgar/data/1804176/000155837024009137/bfly-20240607xex3d1.htm)</u> |  | Form 8-K<br>(Exhibit 3.1) | 6/13/2024 | 001-39292 |
| 4.2 | <u>[Amended and Restated Bylaws of Butterfly Network, Inc.](https://www.sec.gov/Archives/edgar/data/1804176/000110465921023964/tm215875d1_ex3-2.htm)</u> |  | Form 8-K<br>(Exhibit 3.2) | 2/16/2021 | 001-39292 |
| 4.3 | <u>[Specimen Class A Common Stock Certificate.](https://www.sec.gov/Archives/edgar/data/1804176/000110465921023964/tm215875d1_ex4-1.htm)</u> |  | Form 8-K<br>(Exhibit 4.1) | 2/16/2021 | 001-39292 |
| 4.4 | <u>[Warrant Agreement, dated as of May 20, 2020, by and between Butterfly Network, Inc. (formerly Longview Acquisition Corp.) and Continental Stock Transfer & Trust Company.](https://www.sec.gov/Archives/edgar/data/1804176/000114036120012539/nt10009002x11_ex4-1.htm)</u> |  | Form 8-K<br>(Exhibit 4.1) | 5/27/2020 | 001-39292 |
| 5.1 | <u>[Opinion of Foley Hoag LLP.](bfly-20251031xex51.htm)</u> | X |  |  |  |
| 23.1 | <u>[Consent of Deloitte & Touche LLP, independent registered public accounting firm of Butterfly Network, Inc.](bfly-20251031xex231.htm)</u> | X |  |  |  |
| 23.2 | <u>[Consent of Foley Hoag LLP (included in Exhibit 5.1).](bfly-20251031xex51.htm)</u> | X |  |  |  |
| 24.1 | <u>[Power of Attorney (included on the signature page hereof).](#iccf414f6804c4bbca7b3bb89763cc666_1312)</u> | X |  |  |  |
| 99.1+ | <u>[Butterfly Network, Inc. Amended and Restated 2020 Equity Incentive Plan.](https://www.sec.gov/Archives/edgar/data/1804176/000110465921043278/tm214074d1_ex10-19d1.htm)</u> |  | Form 10-K<br>(Exhibit 10.19.1) | 3/29/2021 | 001-39292 |
| 99.2+ | <u>[Butterfly Network, Inc. 2024 Employee Stock Purchase Plan](https://www.sec.gov/Archives/edgar/data/1804176/000155837024010607/bfly-20240630xex10d1.htm)</u> |  | Form 10-Q<br>(Exhibit 10.1) | 8/1/2024 | 001-39292 |
| 107 | <u>[Filing Fee Table](exfilingfees.htm)</u> | X |  |  |  |

---

+ Indicates management contract or compensatory plan.

------

**SIGNATURES**

Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Burlington, Commonwealth of Massachusetts, on October 31, 2025.

**BUTTERFLY NETWORK, INC.**

By: <u>/s/ Joseph DeVivo&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</u>

Joseph DeVivo<br>Chief Executive Officer

**POWER OF ATTORNEY**

We, the undersigned officers and directors of Butterfly Network, Inc., hereby severally constitute and appoint each of Joseph DeVivo and Megan Carlson, our true and lawful attorneys-in-fact, with full power to them in any and all capacities, to sign any and all amendments to this Registration Statement on Form S-8 (including any post-effective amendments thereto), and to file the same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming all that each of said attorneys-in-fact may do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

---

| | | |
|:---|:---|:---|
| <u>Signature</u> | <u>Title</u> | &nbsp;&nbsp;&nbsp;&nbsp;<u>Date</u> |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>/s/ Joseph DeVivo&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Joseph DeVivo | President, Chief Executive Officer, and Chairman of the Board (Principal Executive Officer) | October 31, 2025 |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>/s/ Megan Carlson&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Megan Carlson | Interim Chief Financial Officer<br>(Principal Financial and<br>Accounting Officer) | October 31, 2025 |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>/s/ Dawn Carfora&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Dawn Carfora | Director | October 31, 2025 |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>/s/ Elazer Edelman, M.D., Ph.D.&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Elazer Edelman, M.D., Ph.D. | Director | October 31, 2025 |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>/s/ S. Louise Phanstiel&nbsp;&nbsp;&nbsp;&nbsp;</u><br>S. Louise Phanstiel<br>&nbsp;&nbsp;&nbsp;&nbsp;<u>/s/ Larry Robbins&nbsp;&nbsp;&nbsp;&nbsp;</u><br>Larry Robbins | Director<br>Director | October 31, 2025<br>October 31, 2025 |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>/s/ Jonathan M. Rothberg, Ph.D.</u><br>Jonathan M. Rothberg, Ph.D. | Director | October 31, 2025 |
| &nbsp;&nbsp;&nbsp;&nbsp;<u>/s/ Erica Schwartz, M.D., J.D., M.P.H</u><br>Erica Schwartz, M.D., J.D., M.P.H. | Director | October 31, 2025 |

---

## Ex-Filing

?xml version='1.0' encoding='ASCII'? EX-FILING FEES

---

| |
|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Calculation of Filing Fee Tables**  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **S-8**  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Butterfly Network, Inc.**  |

---

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Security Type**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Security Class Title**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Fee Calculation Rule**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Amount Registered**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Proposed Maximum Offering Price Per Unit**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Maximum Aggregate Offering Price**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Fee Rate**  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Amount of Registration Fee**  |
| 1 | Equity | Class A common stock, par value $0.0001 per share | Other | 8575266 | $2.24 | $19208595.84 | 0.0001381 | $2652.71 |
| 2 | Equity | Class A common stock, par value $0.0001 per share | Other | 2076487 | $1.904 | $3953631.25 | 0.0001381 | $546.00 |
| Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: | Total Offering Amounts: |  | $23162227.09  |  | $3198.71  |
| Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  | Total Fee Offsets:  |  |  |  | $0.00  |
| Net Fee Due:  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  | Net Fee Due:  |  |  |  | $3198.71  |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Offering Note** <br>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>1</sup> Note 1a: Applies to Offering lines 1 and 2. Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the "Securities Act"), this Registration Statement on Form S-8 also covers any additional shares of Class A common stock, par value $0.0001 per share ("Class A Common Stock"), of Butterfly Network, Inc. (the "Registrant") which may become issuable under the Butterfly Network, Inc. Amended and Restated 2020 Equity Incentive Plan (the "2020 Plan") and the Butterfly Network, Inc. 2024 Employee Stock Purchase Plan (the "ESPP") in respect of the securities identified in the above table as a result of any stock dividend, stock split, recapitalization or other similar transaction, and any other securities with respect to which the outstanding shares are converted or exchanged. Pursuant to Rule 416, this registration statement also covers an indeterminate number of shares which may be subject to grant or otherwise issuable after the operation of any such anti-dilution and other provisions. Note 1b: The 8,575,266 shares of Class A Common Stock being registered represents an increase of shares of Class A Common Stock reserved for issuance under the 2020 Plan by operation of the 2020 Plan's "evergreen" provision. The maximum number of shares which may be sold upon the exercise of options or issuance of stock-based awards granted under the 2020 Plan is subject to adjustment in accordance with certain anti-dilution and other provisions of the 2020 Plan. Note 1c: The Proposed Maximum Offering Price per Share for the shares reserved for issuance under the 2020 Plan is estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) and Rule 457(h) of the Securities Act. The price per share and aggregate offering price for shares are calculated based on the average of the high and the low price of the Class A Common Stock as reported on the New York Stock Exchange as of October 27, 2025.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <sup>2</sup> Note 2a: The 2,076,487 shares of Class A Common Stock being registered represents an increase of shares of Class A Common Stock reserved for issuance under the 2024 ESPP by operation of the 2024 ESPP's "evergreen" provision. Note 2b: The Proposed Maximum Offering Price per Share for the shares reserved for issuance under the 2024 ESPP is estimated solely for the purpose of calculating the registration fee pursuant to Rules 457(c) and 457(h) of the Securities Act. The price per share and aggregate offering price are calculated on the basis of $1.904 per share, which is 85% of the average of the high and low prices of the Class A Common Stock as reported on the New York Stock Exchange on October 27, 2025. Pursuant to the 2024 ESPP, the purchase price of the shares of Class A Common Stock reserved for issuance thereunder will be 85% of the fair market value of a share of Class A Common Stock on the first trading day of the offering period or on the exercise date, whichever is less.

---

| | |
|:---|:---|
| | |
| **Rule 457(p)** | **Rule 457(p)** |
| Fee Offset Claims | N/A |
| Fee Offset Sources | N/A |

---

## Exhibit 5.1

**Exhibit 5.1**

---

| | |
|:---|:---|
| ![image_0.jpg](image_0.jpg) | <br>Seaport West<br>155 Seaport Boulevard<br>Boston, MA 02210-2600 <br>617 832 1000 *main*<br>617 832 7000 *fax* |

---

October 31, 2025

Butterfly Network, Inc.

1600 District Avenue

Burlington, MA 01803

Re:&nbsp;&nbsp;&nbsp;&nbsp;<u>Registration Statement on Form S-8</u> 

To the Addressees:

We are familiar with the Registration Statement on Form S-8 (the "**Registration Statement**") being filed by Butterfly Network, Inc., a Delaware corporation (the "**Company**"), with the Securities and Exchange Commission (the "**Commission**") under the Securities Act of 1933, as amended (the "**Securities Act**"), on the date hereof. The Registration Statement relates to the offer and sale by the Company of up to 10,651,753 shares (the "**Shares**") of its Class A common stock, par value $0.0001 per share (the "**Common Stock**"), consisting of (a) 8,575,266 shares of Common Stock (the "**2020 Plan Shares**") issuable under the Company's Amended and Restated 2020 Equity Incentive Plan (the "**2020 Plan**") and (b) 2,076,487 shares of Common Stock (the "**2024 ESPP Shares**") issuable under the Company's 2024 Employee Stock Purchase Plan (the "**2024 ESPP**").

In arriving at the opinion expressed below, we have examined the Company's Third Amended and Restated Certificate of Incorporation and the Company's Amended and Restated Bylaws, the records of meetings and consents of the Company's Board of Directors, or committees thereof, records of the proceedings of its stockholders deemed to be relevant to this opinion letter, the 2020 Plan and the 2024 ESPP, each as provided to us by the Company, and the Registration Statement.

In addition, we have relied upon certificates and other assurances of officers of the Company and others as to factual matters without having independently verified such factual matters. In our examination, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals, the conformity to authentic original documents of all documents submitted to us as copies and the due authorization, execution and delivery of all documents by all persons other than the Company, where authorization, execution and delivery are prerequisites to the effectiveness of such documents. We have also made such investigations of law as we have deemed appropriate as a basis for the opinion expressed below.

We have assumed that the purchase price or other consideration to be received by the Company for the Shares will be valid consideration equal to or in excess of the par value thereof.

In rendering the opinion expressed below, we express no opinion other than as to the Delaware General Corporation Law.

On the basis of the foregoing, it is our opinion that (i) the 2020 Plan Shares, when issued and delivered in accordance with the terms of the 2020 Plan and the awards thereunder and (ii) the 2024 ESPP Shares, when issued and delivered in accordance with the terms of the 2024 ESPP, in each case against the Company's receipt of the purchase price or other consideration therefor, will be validly issued, fully paid and non-assessable.

------

This opinion is to be used only in connection with the offer and sale of the Shares while the Registration Statement is in effect.

This opinion is being delivered solely for the benefit of the Company and such other persons as are entitled to rely upon it pursuant to the applicable provisions of the Securities Act. This opinion may not be used, quoted, relied upon or referred to for any other purpose, nor may it be used, quoted, relied upon or referred to by any other person, for any purpose, without our prior written consent.

This opinion is based upon currently existing statutes, rules and regulations and judicial decisions and is rendered as of the date hereof, and we disclaim any obligation to advise you of any change in any of the foregoing sources of law or subsequent developments in law or changes in facts or circumstances which might affect any matters or opinions set forth herein.

We consent to the filing of this opinion as an exhibit to the Registration Statement. In giving such consent, we do not admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission promulgated thereunder.

This opinion letter shall be interpreted in accordance with the Core Opinion Principles jointly issued by the Committee on Legal Opinions of the American Bar Association's Business Law Section and the Working Group on Legal Opinions Foundation as published in 74 Business Lawyer 815 (2019).&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Very truly yours,

FOLEY HOAG LLP

---

| | |
|:---|:---|
| By: | /s/ Stacie S. Aarestad |
| a Partner | a Partner |

---

## Exhibit 23.1

&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;**Exhibit 23.1**

**CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM**

We consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated February 28, 2025, relating to the financial statements of Butterfly Network, Inc., appearing in the Annual Report on Form 10-K of Butterfly Network, Inc. for the year ended December 31, 2024.

/s/ Deloitte & Touche LLP

New York, New York<br>October 31, 2025

<br>