# EDGAR Filing Document

**Accession Number:** 0001875620
**File Stem:** 0001875620-26-000007
**Filing Date:** 2026-4
**Character Count:** 34056
**Document Hash:** 383a40c40664d646221d40d6653b10f8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001875620-26-000007.hdr.sgml**: 20260423

**ACCESSION NUMBER**: 0001875620-26-000007

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260423

**DATE AS OF CHANGE**: 20260423

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Alamar Biosciences, Inc.
- **CENTRAL INDEX KEY:** 0002104204
- **STANDARD INDUSTRIAL CLASSIFICATION:** LABORATORY ANALYTICAL INSTRUMENTS [3826]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 364899036
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-95626
- **FILM NUMBER:** 26887376

**BUSINESS ADDRESS:**
- **STREET 1:** 47071 BAYSIDE PARKWAY
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538
- **BUSINESS PHONE:** 510-626-9888

**MAIL ADDRESS:**
- **STREET 1:** 47071 BAYSIDE PARKWAY
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Sands Capital Life Sciences Pulse Fund II, L.P.
- **CENTRAL INDEX KEY:** 0001875620

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** E9

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D

**BUSINESS ADDRESS:**
- **STREET 1:** C/O SANDS CAPITAL ALTERNATIVES, LLC
- **STREET 2:** 1000 WILSON BOULEVARD, SUITE 3000
- **CITY:** ARLINGTON
- **STATE:** VA
- **ZIP:** 22209
- **BUSINESS PHONE:** 703-562-4000

**MAIL ADDRESS:**
- **STREET 1:** C/O SANDS CAPITAL ALTERNATIVES, LLC
- **STREET 2:** 1000 WILSON BOULEVARD, SUITE 3000
- **CITY:** ARLINGTON
- **STATE:** VA
- **ZIP:** 22209

## Ex-1

------

EXHIBIT 1

to

SCHEDULE 13G

JOINT ACQUISITION STATEMENT

PURSUANT TO SECTION 240.13d-1(k)

The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint acquisition statements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him, her or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the other entities or persons, except to the extent that he, she or it knows or has reason to believe that such information is inaccurate.

Dated: April 22, 2026

---

| |
|:---|
| **Sands Capital Life Sciences Pulse Fund II, L.P.**<br>By: Sands Capital Life Sciences Pulse Fund II-GP, L.P., *its general partner*<br>By: Sands Capital Life Sciences Pulse Fund II-GP, LLC, *its general partner*<br>By: /s/ Jonathan Goodman |
| Name: Jonathan Goodman |
| Title: General Counsel |
| <br> **Sands Capital Alternatives, LLC**<br>|
| By: /s/ Jonathan Goodman |
| Name: Jonathan Goodman<br> Title: General Counsel<br>By: /s/ Frank M. Sands |
| Name: Frank M. Sands |

---

## Ex-2

**EXHIBIT 99.2** **WAIVER OF REGISTRATION RIGHTS AND NOTICE**

This Waiver of Registration Rights and Notice, dated as of January 12, 2026, (this "Waiver") is entered into by and among Alamar Biosciences, Inc. (the "Company") and the undersigned stockholders of the Company.

The undersigned stockholders of the Company are parties to that certain Amended and Restated Investors' Rights Agreement, by and among the Company and the persons and entities referenced therein, dated as of February 21, 2024 (as amended and/or restated from time to time, the "Rights Agreement"). Capitalized terms used but not defined herein shall have the respective meanings set forth in the Rights Agreement.

The undersigned understands that the Company is considering the sale of Common Stock to the public through a firm commitment underwritten initial public offering under the Securities Act (the "Offering"), pursuant to a Registration Statement on Form S-1 and any related registration statement filed pursuant to Rule 462(b) of the Securities Act (as the same may be amended or supplemented, the "Registration Statement"), to be filed with the Securities and Exchange Commission.

Pursuant to Section 2.2 of the Rights Agreement, the undersigned and each other holder of outstanding Registrable Securities who is party to the Rights Agreement (each, a "Holder") has, under certain circumstances the right to be notified if the Company at any time proposes to register any of its securities under the Securities Act of 1933, as amended (the "Securities Act"), in connection with the public offering of such securities and to include in such registration statement all of the Registrable Securities that each such Holder has requested to be included in such registration, subject to certain limitations (the "Registration Rights").

In connection with the Offering and the preparation and filing of the Registration Statement, the undersigned understands that the Company is requesting the waiver of the Registration Rights with respect to the Registration Statement, as well as a waiver of any further rights to notice with respect to the Registration Statement under the Rights Agreement or otherwise (the "Notice Rights"). **WAIVER**

The undersigned has been requested to waive his, her or its Registration Rights and Notice Rights in connection with the Offering. The undersigned desires to facilitate a successful Offering and hereby waives, for and on behalf of all Holders, the Registration Rights in connection with any offering to be made pursuant to the Registration Statement, as well as any Notice Rights with respect to the foregoing.

The undersigned understands and acknowledges that, pursuant to Section 4.7 of the Rights Agreement, the Registration Rights and the related Notice Rights of all Holders may be waived with the written consent of (i) the Company and (ii) the holders of the Preferred Majority. The undersigned further acknowledges that this Waiver shall apply only to any Offering to be made pursuant to the Registration Statement, so long as Registration Statement has been declared effective by October 31, 2026, and will not affect the undersigned's Registration Rights, Notice Rights or any other rights in connection with any registration statements other than the Registration Statement. Except as expressly waived, all other terms and conditions of the Rights Agreement shall remain in full force and effect.

The undersigned understands and acknowledges that the Company will proceed with the Offering and the preparation and filing of the Registration Statement in reliance on this Waiver and in connection therewith, the undersigned hereby represents and warrants to the Company that (i) the undersigned has the full right, power and authority to execute and deliver this Waiver, (ii) this Waiver has been duly executed and delivered by the undersigned and constitutes the legal, valid and binding obligation of the undersigned, enforceable in accordance with its terms, except (A) as such enforcement is limited by bankruptcy, insolvency or other similar laws affecting the enforcement of creditors' rights generally and (B) for limitations imposed by general principles of equity.

This Waiver may be executed and delivered in multiple counterparts (including facsimile, PDF or other electronic counterparts), each of which shall be an original, but all of which together shall constitute one instrument. [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK] <br>**SIGNATURE PAGE TO WAIVER OF REGISTRATION RIGHTS AND NOTICE**

IN WITNESS WHEREOF, the parties hereto have executed this WAIVER OF REGISTRATION RIGHTS AND NOTICE as of the date set forth in the first paragraph hereof.

**COMPANY:**

ALAMAR BIOSCIENCES, INC.

By: /s/ Yuling Luo, Ph.D.<br> Name: Yuling Luo, Ph.D.<br> Title: Chief Executive Officer <br>**SIGNATURE PAGE TO WAIVER OF REGISTRATION RIGHTS AND NOTICE**

IN WITNESS WHEREOF, the parties hereto have executed this WAIVER OF REGISTRATION RIGHTS AND NOTICE as of the date set forth in the first paragraph hereof.

**HOLDER:**

SANDS CAPITAL LIFE SCIENCES PULSE FUND II, L.P.

By: Sands Capital Life Sciences Pulse Fund II-GP, L.P., its general partner<br> By: Sands Capital Life Sciences Pulse Fund II-GP, LLC, its general partner<br> By: /s/ Jonathan Goodman<br> Name: Jonathan Goodman<br> Title: General Counsel

Docusign Envelope ID: 20C95CF0-7292-4C3B-83B6-7C03F58B32B5

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**Alamar Biosciences, Inc.**

*(Name of Issuer)*

**Common Stock, par value $0.0001 per share**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Jonathan Goodman**<br>c/o Sands Capital Alternatives, LLC<br>1000 Wilson Boulevard, Suite 3000<br>Arlington VA 22209<br>703-562-4000

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**04/16/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Sands Capital Life Sciences Pulse Fund II, L.P.** | Name of reporting person<br>**Sands Capital Life Sciences Pulse Fund II, L.P.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**CAYMAN ISLANDS** | Citizenship or place of organization<br>**CAYMAN ISLANDS** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**4230926.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**4230926.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**4230926.00** | Aggregate amount beneficially owned by each reporting person<br>**4230926.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**6.3%** | Percent of class represented by amount in Row (11)<br>**6.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

**Comment for Reporting Person:** Rows 7 through 13 reflect shares held directly by Sands Capital Life Sciences Pulse Fund II, L.P. The percentage in Row 13 is based on 67,163,276 shares of Common Stock outstanding immediately after the closing of the Issuer's initial public offering, as reported in the Issuer's final prospectus filed pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended, on April 16, 2026. This percentage does not give effect to any exercise by the underwriters of their option to purchase up to 1,687,500 additional shares of Common Stock. If such option is exercised in full, such Reporting Person would beneficially own approximately 6.1% of the then outstanding Common Stock, based on 68,850,776 shares outstanding.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Sands Capital Alternatives, LLC** | Name of reporting person<br>**Sands Capital Alternatives, LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**4230926.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**4230926.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**4230926.00** | Aggregate amount beneficially owned by each reporting person<br>**4230926.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**6.3%** | Percent of class represented by amount in Row (11)<br>**6.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IA** | Type of Reporting Person (See Instructions)<br>**IA** | |

---

**Comment for Reporting Person:** Rows 7 through 13 reflect shares held directly by Sands Capital Life Sciences Pulse Fund II, L.P. Sands Capital Alternatives, LLC did not directly furnish consideration for such shares and is reporting solely because it may be deemed to beneficially own the shares held by Sands Capital Life Sciences Pulse Fund II, L.P. The percentage in Row 13 is based on 67,163,276 shares of Common Stock outstanding immediately after the closing of the Issuer's initial public offering, as reported in the Issuer's final prospectus filed pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended, on April 16, 2026. This percentage does not give effect to any exercise by the underwriters of their option to purchase up to 1,687,500 additional shares of Common Stock. If such option is exercised in full, such Reporting Person would beneficially own approximately 6.1% of the then outstanding Common Stock, based on 68,850,776 shares outstanding.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**SANDS FRANK M.** | Name of reporting person<br>**SANDS FRANK M.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**4230926.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**4230926.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**4230926.00** | Aggregate amount beneficially owned by each reporting person<br>**4230926.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**6.3%** | Percent of class represented by amount in Row (11)<br>**6.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** Rows 7 through 13 reflect shares held directly by Sands Capital Life Sciences Pulse Fund II, L.P. Frank M. Sands did not directly furnish consideration for such shares and is reporting solely because he may be deemed to beneficially own the shares held by Sands Capital Life Sciences Pulse Fund II, L.P. The percentage in Row 13 is based on 67,163,276 shares of Common Stock outstanding immediately after the closing of the Issuer's initial public offering, as reported in the Issuer's final prospectus filed pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended, on April 16, 2026. This percentage does not give effect to any exercise by the underwriters of their option to purchase up to 1,687,500 additional shares of Common Stock. If such option is exercised in full, such Reporting Person would beneficially own approximately 6.1% of the then outstanding Common Stock, based on 68,850,776 shares outstanding.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $0.0001 per share

**(b) Name of Issuer:**
Alamar Biosciences, Inc.

**(c) Address of Issuer's Principal Executive Offices:**
47071 BAYSIDE PARKWAY, FREMONT, CA, 94538

This Schedule 13D relates to the common stock, par value $0.0001 per share (the "Common Stock"), of Alamar Biosciences, Inc., a Delaware corporation (the "Issuer"). The principal executive offices of the Issuer are located at 47071 Bayside Parkway, Fremont, California 94538.

**Item 4. Purpose of Transaction**

The Reporting Persons acquired and hold the Common Stock for investment purposes in the ordinary course of Sands Pulse Fund II's investment activities.

Subject to applicable legal requirements or contractual restrictions, one or more of the Reporting Persons may purchase additional securities of the Issuer from time to time in open market or private transactions depending on their evaluation of the Issuer's business, prospects and financial condition, the market for the Issuer's securities, other developments concerning the Issuer, the reaction of the Issuer to the Reporting Persons' ownership of the Issuer's securities, other opportunities available to the Reporting Persons, and general economic, money market and stock market conditions. In addition, depending upon the factors referred to above, the Reporting Persons may dispose of all or a portion of their securities of the Issuer at any time. Each of the Reporting Persons reserves the right to increase or decrease its holdings on such terms and at such times as each may decide.

In addition, consistent with their investment purpose, the Reporting Persons may engage in communications with persons associated with the Issuer, including shareholders of the Issuer, officers of the Issuer and/or members of the board of directors of the Issuer, to discuss matters regarding the Issuer including but not limited to its operations and strategic direction. Ian Ratcliffe, who serves on the Issuer's board of directors, is an Executive Managing Partner of the Life Sciences Pulse strategy and an Executive Managing Director of Sands Capital Alternatives, and therefore will engage in regular discussions with the Issuer's board of directors and management as part of his duties as a director.

Except as set forth in this Schedule 13D, the Reporting Persons do not currently have any plans or proposals that relate to or would result in any of the matters described in paragraphs (a) through (j) of Item 4 of Schedule 13D, although the Reporting Persons reserve the right to formulate such plans or proposals in the future.

**Item 5. Interest in Securities of the Issuer**

**(a)**
As of the date of this Schedule 13D, Sands Pulse Fund II directly holds 4,230,926 shares of Common Stock, representing approximately 6.3% of the outstanding Common Stock. The percentage reported herein is based on 67,163,276 shares of Common Stock to be outstanding immediately after the completion of the Issuer's initial public offering, as reported in the Issuer's final prospectus filed pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended (the "Securities Act"), with the Securities and Exchange Commission on April 16, 2026. This percentage does not give effect to any exercise by the underwriters of their overallotment option to purchase up to 1,687,500 additional shares of Common Stock. If such option is exercised in full, the Reporting Persons would beneficially own approximately 6.1% of the then-outstanding Common Stock (based on 68,850,776 shares outstanding).

Sands Pulse Fund II has shared power to vote or direct the vote of, and shared power to dispose or direct the disposition of, 4,230,926 shares of Common Stock.

Sands Capital Alternatives, as investment manager of Sands Pulse Fund II, may be deemed to have shared power to vote or direct the vote of, and shared power to dispose or direct the disposition of, 4,230,926 shares of Common Stock.

Sands, by virtue of his ultimate voting and investment power over securities held by Sands Pulse Fund II, may be deemed to have shared power to vote or direct the vote of, and shared power to dispose or direct the disposition of, 4,230,926 shares of Common Stock.

**(b)**
(i) Sole power to vote or direct the vote: 0 shares;

(ii) Shared power to vote or direct the vote: 4,230,926 shares (for each of Sands Pulse Fund II, Sands Capital Alternatives, and Sands);

(iii) Sole power to dispose or direct the disposition: 0 shares;

(iv) Shared power to dispose or direct the disposition: 4,230,926 shares (for each of Sands Pulse Fund II, Sands Capital Alternatives, and Sands).

See Item 5(a) above for further detail regarding the basis for each Reporting Person's beneficial ownership.

**(c)**
The transactions effected by the Reporting Persons during the 60 days preceding the filing of this Schedule 13D are as follows: (i) immediately prior to the closing of the Issuer's initial public offering, Sands Pulse Fund II received 3,472,417 shares of Common Stock from the Issuer upon the redesignation of shares of Class B common stock into Common Stock; (ii) immediately prior to the closing of the Issuer's initial public offering, Sands Pulse Fund II received 458,509 shares of Common Stock from the Issuer upon the automatic conversion of the Convertible Note at a conversion price of $14.45 per share; and (iii) on April 16, 2026, Sands Pulse Fund II agreed to purchase, and at the closing of the Issuer's initial public offering received, 300,000 shares of Common Stock at $17.00 per share in the Issuer's initial public offering. All of the foregoing transactions were effected directly with the Issuer or in the Issuer's initial public offering, and not on a national securities exchange. Except as set forth above, none of the Reporting Persons has effected any transaction in the Common Stock during the 60 days preceding the filing of this Schedule 13D.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

The information set forth in Items 2, 3, 4 and 5 of this Schedule 13D is hereby incorporated by reference into this Item 6.

Amended and Restated Investors' Rights Agreement

Sands Pulse Fund II is party to that certain Amended and Restated Investors' Rights Agreement, by and among the Issuer and certain of its stockholders, dated as of February 21, 2024 (the "Rights Agreement").

Demand Registration Rights

Subject to the terms and conditions of the Rights Agreement, if, at any time after the earlier of (i) five years after the date of the Rights Agreement and (ii) six months after the effective date of the Issuer's initial public offering, the holders of at least twenty-five percent (25%) of the Registrable Securities (as defined in the Rights Agreement) then outstanding request that the Issuer file a registration statement under the Securities Act covering Registrable Securities with an anticipated aggregate offering price of at least $15,000,000, the Issuer is required to provide notice of such request to all holders of registration rights and use its commercially reasonable efforts to effect such registration. The Issuer is not required to effect more than two registrations pursuant to these demand registration rights and may defer such registration for up to 120 days in certain circumstances.

Piggyback Registration Rights

If the Issuer proposes to register any of its stock or other securities under the Securities Act in connection with a public offering of such securities solely for cash, holders of Registrable Securities are entitled to notice of such registration and, subject to the terms and conditions of the Rights Agreement, have the right to include their Registrable Securities in such registration.  In an underwritten offering, if the total amount of securities, including Registrable Securities, requested by stockholders to be included in such offering exceeds the amount of securities sold other than by the Issuer that the underwriters determine in their sole discretion is compatible with the success of the offering, the Issuer shall be required to include in the offering only that number of such securities, including Registrable Securities, that the underwriters determine in their sole discretion will not jeopardize the success of the offering.  In the event that the underwriters determine that less than all of the Registrable Securities requested to be registered can be included in such offering, then the Registrable Securities that are included in such offering shall be apportioned pro rata among the selling holders based on the number of Registrable Securities held by all selling holders, or in such other proportions as shall mutually be agreed to by all such selling holders.  Notwithstanding the foregoing, in no event shall the amount of securities of the selling holders included in the offering be reduced below thirty percent (30%) of the total amount of securities included in such offering, unless such offering is the Initial Offering, in which case the selling holders may be excluded if the underwriters make the determination described above and no other stockholder's securities are included in such offering.

Form S-3 Registration Rights

Subject to the terms and conditions of the Rights Agreement, holders of at least thirty percent (30%) of the Registrable Securities may request that the Issuer effect a registration on Form S-3 covering Registrable Securities with an anticipated aggregate offering price of at least $10,000,000, provided that the Issuer is then eligible to use Form S-3. The Issuer is not required to effect more than two Form S-3 registrations in any twelve-month period and may defer such registration for up to 90 days in certain circumstances.

Expenses of Registration Rights

The Issuer is required to pay all expenses incurred in connection with registrations effected pursuant to the Rights Agreement, other than underwriting discounts and commissions, including, without limitation, all registration, filing and qualification fees, printers' and accounting fees, fees and disbursements of counsel for the Issuer, and the reasonable fees and disbursements of one counsel for the selling holders (not to exceed $50,000), in each case subject to the terms and conditions of the Rights Agreement.

Expiration of Registration Rights

The registration rights described above terminate upon the earliest to occur of, among other things, (i) five years following the consummation of the Issuer's initial public offering, (ii) with respect to a particular holder, such earlier time as such holder may sell all of its shares under Rule 144(b)(1)(i) or, if such holder holds one percent (1%) or less of the Issuer's outstanding Common Stock, all of such holder's Registrable Securities in any three-month period pursuant to Rule 144, and (iii) a Liquidation Event, as defined in the Rights Agreement.

Waiver of Registration Rights and Notice

In connection with the Issuer's initial public offering, Sands Pulse Fund II and certain other stockholders entered into that certain Waiver of Registration Rights and Notice, dated as of January 12, 2026 (the "Waiver"). Pursuant to the Waiver, the signatories waived, for and on behalf of all holders, the registration rights and any notice rights with respect to the registration statement filed in connection with the Issuer's initial public offering. The Waiver applies only to any offering made pursuant to such registration statement, so long as such registration statement was declared effective by October 31, 2026, and, except as expressly waived therein, all other terms and conditions of the Rights Agreement remain in full force and effect.

Lock-Up Agreement

In connection with the Issuer's initial public offering, Sands Pulse Fund II entered into a lock-up agreement (the "Lock-Up Agreement"). Pursuant to the Lock-Up Agreement, and subject to certain exceptions, Sands Pulse Fund II agreed that, without the prior written consent of J.P. Morgan Securities LLC and BofA Securities, Inc. on behalf of the underwriters, it would not, during the period beginning on the date of the Lock-Up Agreement and ending at the close of business 180 days after the date of the final prospectus (October 13, 2026) relating to the Issuer's initial public offering, directly or indirectly offer, pledge, sell, contract to sell, grant any option or right to purchase, lend, or otherwise transfer or dispose of securities of the Issuer, enter into hedging or similar transactions relating thereto, or make any demand for or exercise any right with respect to the registration of any such securities, in each case subject to certain exceptions. The final prospectus relating to the Issuer's initial public offering and the form of Lock-Up Agreement reflect those restrictions.

Convertible Note

Sands Pulse Fund II is also party to the Convertible Note. Prior to its conversion, the Convertible Note provided, among other things, for automatic conversion upon a "Qualified Financing", defined as the occurrence of either (i) an equity financing in which the Issuer issues and sells shares of its preferred stock pari passu or senior to the then-most senior preferred stock of the Issuer with total proceeds to the Issuer of not less than $150,000,000 (excluding the conversion of the Notes or other convertible securities issued for capital raising purposes), or (ii) the completion of an initial public offering (the "Initial Offering"), with conversion at a price per share equal to 85% of the applicable offering price. In the event of a sale of the Issuer, the holder of the Convertible Note had the option to elect to receive either (i) cash equal to two times (2.0x) the outstanding principal amount plus any unpaid accrued interest, or (ii) the amount and form of consideration the holder would have received if the Convertible Note had converted into shares of Series C Preferred Stock, par value $0.0001 per share, of the Issuer immediately prior to such transaction, subject to a cap of three times (3.0x) the outstanding principal amount. The Convertible Note was converted upon completion of the Initial Offering as described in Item 3 above.

The foregoing description of the Convertible Note does not purport to be complete and is qualified in its entirety by reference to the form of Convertible Promissory Note, which is incorporated by reference herein.

The foregoing descriptions of the Rights Agreement, the Waiver, the Convertible Note and the Lock-Up Agreement do not purport to be complete and are qualified in their entirety by reference to the full text of such agreements, copies or forms of which are filed as exhibits to this Schedule 13D or incorporated by reference herein.

Except as described above, none of the Reporting Persons is a party to any contract, arrangement, understanding, or relationship (legal or otherwise) with respect to any securities of the Issuer, including but not limited to the transfer or voting of any securities, finder's fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or losses, or the giving or withholding of proxies.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Sands Capital Life Sciences Pulse Fund II, L.P.

**Signature:** /s/ Jonathan Goodman

**Name/Title:** Jonathan Goodman, General Counsel of the GP of the GP of Sands Capital Life Sciences Pulse Fund II, L.P.

**Date:** 04/23/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Sands Capital Alternatives, LLC

**Signature:** /s/ Jonathan Goodman

**Name/Title:** Jonathan Goodman, General Counsel

**Date:** 04/23/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** SANDS FRANK M.

**Signature:** /s/ Frank M. Sands

**Name/Title:** Frank M. Sands

**Date:** 04/23/2026