# EDGAR Filing Document

**Accession Number:** 0001443898
**File Stem:** 0001193125-23-032078
**Filing Date:** 2023-2
**Character Count:** 22759
**Document Hash:** ad19be161e803e7b974fd0a5cce8ab16
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-032078.hdr.sgml**: 20230210

**ACCESSION NUMBER**: 0001193125-23-032078

**CONFORMED SUBMISSION TYPE**: SC 13G/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230210

**DATE AS OF CHANGE**: 20230210

**GROUP MEMBERS**: GILBERT H. KLIMAN (A MANAGING DIRECTOR OF INTERWEST MANAGEMENT PARTNERS X, LLC)

**GROUP MEMBERS**: INTERWEST MANAGEMENT PARTNERS X, LLC (THE GENERAL PARTNER OF INTERWEST PARTNERS X, LP)

**GROUP MEMBERS**: KEVAL DESAI (A VENTURE MEMBER OF INTERWEST MANAGEMENT PARTNERS X, LLC)

**GROUP MEMBERS**: KHALED A. NASR (A VENTURE MEMBER OF INTERWEST MANAGEMENT PARTNERS X, LLC)

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SERA PROGNOSTICS, INC.
- **CENTRAL INDEX KEY:** 0001534969
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-MEDICAL LABORATORIES [8071]
- **IRS NUMBER:** 261911522
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92704
- **FILM NUMBER:** 23610043

**BUSINESS ADDRESS:**
- **STREET 1:** 2749 E. PARLEYS WAY
- **STREET 2:** SUITE 200
- **CITY:** SALT LAKE CITY
- **STATE:** UT
- **ZIP:** 84109
- **BUSINESS PHONE:** (801) 990-0520

**MAIL ADDRESS:**
- **STREET 1:** 2749 E. PARLEYS WAY
- **STREET 2:** SUITE 200
- **CITY:** SALT LAKE CITY
- **STATE:** UT
- **ZIP:** 84109
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** INTERWEST PARTNERS X LP
- **CENTRAL INDEX KEY:** 0001443898
- **IRS NUMBER:** 263131621
- **STATE OF INCORPORATION:** CA

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A

**BUSINESS ADDRESS:**
- **STREET 1:** C/O INTERWEST PARTNERS
- **STREET 2:** 467 FIRST STREET SUITE 201
- **CITY:** LOS ALTOS
- **STATE:** CA
- **ZIP:** 94022
- **BUSINESS PHONE:** 650-854-8585

**MAIL ADDRESS:**
- **STREET 1:** C/O INTERWEST PARTNERS
- **STREET 2:** 467 FIRST STREET SUITE 201
- **CITY:** LOS ALTOS
- **STATE:** CA
- **ZIP:** 94022

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;OMB APPROVAL | &nbsp;&nbsp;&nbsp;OMB APPROVAL |
| &nbsp;&nbsp;&nbsp;OMB Number: | 3235-0145 |
| &nbsp;&nbsp;&nbsp;Expires: | February 28, 2010 |

---

<u>Estimated average burden hours per response</u>   <u>10.4</u>

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**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**WASHINGTON, D.C. 20549** 

------

**SCHEDULE 13G** 

**Under the Securities Exchange Act of 1934** 

**(AMENDMENT NO 1)\*** 

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## Sera Prognostics, Inc.
**(Name of Issuer)** 

**Class A Common Stock** 

**(Title of Class of Securities)** 

**81749D107** 

**(CUSIP Number)** 

**December 31, 2022** 

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

------

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☐ Rule 13d-1(b)

☐ Rule 13d-1(c)

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;☒ Rule 13d-1(d)

\* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

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**Page 1 of 9 Pages** 

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| | | |
|:---|:---|:---|
| **Cusip No. 81749D107** | **13G** | **Page 2 of 9 Pages** |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; 1 | &nbsp;&nbsp;&nbsp;&nbsp;NAME OF REPORTING PERSONS<br>&nbsp;&nbsp;&nbsp;&nbsp;InterWest Partners X, LP ("IWP X") |
| &nbsp;&nbsp;&nbsp; 2 | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br> &nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☐ |
| &nbsp;&nbsp;&nbsp; 3 | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; 4 | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>&nbsp;&nbsp;&nbsp;&nbsp;California |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 5 | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 6 | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 7 | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 8 | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; 9 | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 (1) |
| &nbsp;&nbsp;&nbsp;10 | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES:<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;11 | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>&nbsp;&nbsp;&nbsp;&nbsp;8.5% (2) |
| &nbsp;&nbsp;&nbsp;12 | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;PN |

---

(1) The shares are owned by IWP X and include 126,258 shares of Class A Common Stock issuable pursuant to
Class A common stock purchase warrants.

(2) Based upon 29,611,720 and 1,405,259 shares of the Issuer's Class A and B Common Stock outstanding as
of November 4, 2022, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission (the "SEC") on November 9, 2022.

**Page 2 of 9 Pages** 

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---

| | | |
|:---|:---|:---|
| **Cusip No. 81749D107** | **13G** | **Page 3 of 9 Pages** |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; 1 | &nbsp;&nbsp;&nbsp;&nbsp;NAME OF REPORTING PERSONS<br>&nbsp;&nbsp;&nbsp;&nbsp;InterWest Management Partners X, LLC (the General Partner of InterWest Partners X, LP) |
| &nbsp;&nbsp;&nbsp; 2 | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br> &nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☐ |
| &nbsp;&nbsp;&nbsp; 3 | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; 4 | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>&nbsp;&nbsp;&nbsp;&nbsp;California |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 5 | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 6 | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 7 | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 8 | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; 9 | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 (1) |
| &nbsp;&nbsp;&nbsp;10 | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES:<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;11 | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>&nbsp;&nbsp;&nbsp;&nbsp;8.5% (2) |
| &nbsp;&nbsp;&nbsp;12 | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;OO |

---

(1) The shares are owned by IWP X and include 126,258 shares of Class A Common Stock issuable pursuant to
Class A common stock purchase warrants.

(2) Based upon 29,611,720 and 1,405,259 shares of the Issuer's Class A and B Common Stock outstanding as
of November 4, 2022, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission (the "SEC") on November 9, 2022.

**Page 3 of 9 Pages** 

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| | | |
|:---|:---|:---|
| **Cusip No. 81749D107** | **13G** | **Page 4 of 9 Pages** |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; 1 | &nbsp;&nbsp;&nbsp;&nbsp;NAME OF REPORTING PERSONS<br>&nbsp;&nbsp;&nbsp;&nbsp;Keval Desai (a Venture Member of InterWest Management Partners X, LLC) |
| &nbsp;&nbsp;&nbsp; 2 | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br> &nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☐ |
| &nbsp;&nbsp;&nbsp; 3 | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; 4 | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>&nbsp;&nbsp;&nbsp;&nbsp;United States |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 5 | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 6 | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 7 | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 8 | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; 9 | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp;10 | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES:<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;11 | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>&nbsp;&nbsp;&nbsp;&nbsp;8.5% |
| &nbsp;&nbsp;&nbsp;12 | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;IN |

---

Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Keval Desai that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose.

**Page 4 of 9 Pages** 

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| | | |
|:---|:---|:---|
| **Cusip No. 81749D107** | **13G** | **Page 5 of 9 Pages** |

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---

| | | | |
|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; 1 | &nbsp;&nbsp;&nbsp;&nbsp;NAME OF REPORTING PERSONS<br>&nbsp;&nbsp;&nbsp;&nbsp;Gilbert H. Kliman (a Managing Director of InterWest Management Partners X, LLC) | &nbsp;&nbsp;&nbsp;&nbsp;NAME OF REPORTING PERSONS<br>&nbsp;&nbsp;&nbsp;&nbsp;Gilbert H. Kliman (a Managing Director of InterWest Management Partners X, LLC) | &nbsp;&nbsp;&nbsp;&nbsp;NAME OF REPORTING PERSONS<br>&nbsp;&nbsp;&nbsp;&nbsp;Gilbert H. Kliman (a Managing Director of InterWest Management Partners X, LLC) |
| &nbsp;&nbsp;&nbsp; 2 | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br> &nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☐ | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br> &nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☐ | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br> &nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☐ |
| &nbsp;&nbsp;&nbsp; 3 | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; 4 | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>&nbsp;&nbsp;&nbsp;&nbsp;United States | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>&nbsp;&nbsp;&nbsp;&nbsp;United States | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>&nbsp;&nbsp;&nbsp;&nbsp;United States |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 5 | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 6 | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 7 | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 8 | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp; 9 | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp;10 | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES:<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES:<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES:<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;11 | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>&nbsp;&nbsp;&nbsp;&nbsp;8.5% | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>&nbsp;&nbsp;&nbsp;&nbsp;8.5% | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>&nbsp;&nbsp;&nbsp;&nbsp;8.5% |
| &nbsp;&nbsp;&nbsp;12 | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;IN | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;IN | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;IN |

---

Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Gilbert H. Kliman that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose.

**Page 5 of 9 Pages** 

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| | | |
|:---|:---|:---|
| **Cusip No. 81749D107** | **13G** | **Page 6 of 9 Pages** |

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---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; 1 | &nbsp;&nbsp;&nbsp;&nbsp;NAME OF REPORTING PERSONS<br>&nbsp;&nbsp;&nbsp;&nbsp;Khaled A. Nasr (a Venture Member of InterWest Management Partners X, LLC) |
| &nbsp;&nbsp;&nbsp; 2 | &nbsp;&nbsp;&nbsp;&nbsp;CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP<br> &nbsp;&nbsp;&nbsp;&nbsp;(a) ☐ (b) ☐ |
| &nbsp;&nbsp;&nbsp; 3 | &nbsp;&nbsp;&nbsp;&nbsp;SEC USE ONLY |
| &nbsp;&nbsp;&nbsp; 4 | &nbsp;&nbsp;&nbsp;&nbsp;CITIZENSHIP OR PLACE OF ORGANIZATION<br>&nbsp;&nbsp;&nbsp;&nbsp;United States |

---

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 5 | &nbsp;&nbsp;&nbsp;&nbsp;SOLE VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 6 | &nbsp;&nbsp;&nbsp;&nbsp;SHARED VOTING POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 7 | &nbsp;&nbsp;&nbsp;&nbsp;SOLE DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;0 |
| &nbsp;&nbsp;&nbsp; NUMBER OF<br> SHARES<br> BENEFICIALLY <br> OWNED BY<br> REPORTING<br> PERSON<br> WITH | 8 | &nbsp;&nbsp;&nbsp;&nbsp;SHARED DISPOSITIVE POWER<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |

---

---

| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; 9 | &nbsp;&nbsp;&nbsp;&nbsp;AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;2,542,499 |
| &nbsp;&nbsp;&nbsp;10 | &nbsp;&nbsp;&nbsp;&nbsp;CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES:<br>&nbsp;&nbsp;&nbsp;&nbsp;☐ |
| &nbsp;&nbsp;&nbsp;11 | &nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>&nbsp;&nbsp;&nbsp;&nbsp;8.5% |
| &nbsp;&nbsp;&nbsp;12 | &nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON<br>&nbsp;&nbsp;&nbsp;&nbsp;IN |

---

Neither the filing of this statement on Schedule 13G nor any of its contents shall be deemed to constitute an admission by Khaled A. Nasr that he is the beneficial owner of any of the Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose.

**Page 6 of 9 Pages** 

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| | | |
|:---|:---|:---|
| **Cusip No. 81749D107** | **13G** | **Page 7 of 9 Pages** |

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**ITEM 1.** 

**(a)** **NAME OF ISSUER:** Sera Prognostics, Inc.

**(b)** **ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICE:** 

2749 E Parleys Way #200, Salt Lake City, UT 84109

**ITEM 2.** 

**(a)** **NAME OF PERSON(S) FILING:** 

InterWest Partners X, LP ("IWP X")

InterWest Management Partners X, LLC ("IMP X")

Keval Desai ("Desai")

Gilbert H. Kliman ("Kliman")

Khaled A. Nasr ("Nasr")

**(b)** **ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:** 

467 First Street, Suite 201, Los Altos, CA 94022

**(c)** **CITIZENSHIP/PLACE OF ORGANIZATION:** 

---

| | |
|:---|:---|
| IWP X: | California |
| IMP X: | California |
| Desai: | United States |
| Kliman: | United States |
| Nasr: | United States |

---

**(d)** **TITLE OF CLASS OF SECURITIES:** Class A Common Stock

**(e)** **CUSIP NUMBER: 81749D107** 

**ITEM 3. NOT APPLICABLE.** 

**Page 7 of 9 Pages** 

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| | | |
|:---|:---|:---|
| **Cusip No. 81749D107** | **13G** | **Page 8 of 9 Pages** |

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**ITEM 4. OWNERSHIP.** 

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| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
|  | **IWP X** |  | **IMP X (1)** | **Desai (2)** | **Kliman (2)** | **Nasr (2)** |
|  Beneficial Ownership | 2542499 | (3) | 2542499 | 2542499 | 2542499 | 2542499 |
|  Percentage of Class | 8.5 | %(4) | 8.5 | 8.5 | 8.5 | 8.5 |
|  Sole Voting Power | 2542499 |  | 2542499 | 0 | 0 | 0 |
|  Shared Voting Power | 0 |  | 0 | 2542499 | 2542499 | 2542499 |
|  Sole Dispositive Power | 2542499 |  | 2542499 | 0 | 0 | 0 |
|  Shared Dispositive Power | 0 |  | 0 | 2542499 | 2542499 | 2542499 |

---

(1) IMP X is the general partner of IWP X.

(2) Kliman is a Managing Director of IMP X. Desai and Nasr are Venture Members of IMP X. The Managing Directors and
Venture Members of IMP X share voting and investment control over shares held by IWP X.

(3) The shares are owned by IWP X and include 126,258 shares of Class A Common Stock issuable pursuant to
Class A common stock purchase warrants.

(4) Based upon 29,611,720 and 1,405,259 shares of the Issuer's Class A and B Common Stock outstanding as
of November 4, 2022, as reported in the Issuer's Form 10-Q filed with the Securities and Exchange Commission (the "SEC") on November 9, 2022.

**ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.** 

Not applicable.

**ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.** 

Under certain circumstances set forth in the limited liability company operating agreement of IMP X, the members of such limited liability company have the right to receive dividends from, or the proceeds from the sale of, the common stock of Issuer beneficially owned by such limited liability company.

**ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.** 

Not applicable.

**ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.** 

No reporting person is a member of a group as defined in section 240.13d-1(b)(1)(iii)(H) of the Act.

**ITEM 9. NOTICE OF DISSOLUTION OF THE GROUP.** 

Not applicable.

**Page 8 of 9 Pages** 

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| | | |
|:---|:---|:---|
| **Cusip No. 81749D107** | **13G** | **Page 9 of 9 Pages** |

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**ITEM 10. CERTIFICATION.** 

Not applicable.

**EXHIBITS** 

Joint Filing Statement attached as Exhibit A.

**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.

Date: February 10, 2023

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| | |
|:---|:---|
| INTERWEST PARTNERS X, LP | INTERWEST PARTNERS X, LP |
| By: | InterWest Management Partners X, LLC, its General Partner |
| By: | /s/ Karen A. Wilson, Power of Attorney |
|  | Attorney-in-Fact |
| INTERWEST MANAGEMENT PARTNERS X, LLC | INTERWEST MANAGEMENT PARTNERS X, LLC |
| By: | Karen A. Wilson, Power of Attorney |
|  | Attorney-in-Fact |
| By: | /s/ Keval Desai by Karen A. Wilson, Power of Attorney |
| Name: | Keval Desai |
| By: | /s/ Gilbert H. Kliman by Karen A. Wilson, Power of Attorney |
| Name: | Gilbert H. Kliman |
| By: | /s/ Khaled A. Nasr |
| Name: | Khaled A. Nasr |

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**Page 9 of 9 Pages**

## Ex-99.A

**EXHIBIT A** 

**Joint Filing Statement** 

We, the undersigned, hereby express our agreement that the attached Schedule 13G is filed on behalf of each of us.

Date: February 10, 2023

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| | |
|:---|:---|
| INTERWEST PARTNERS X, LP | INTERWEST PARTNERS X, LP |
| By: | InterWest Management Partners X, LLC, its General Partner |
| By: | /s/ Karen A. Wilson, Power of Attorney |
|  | Attorney-in-Fact |
| INTERWEST MANAGEMENT PARTNERS X, LLC | INTERWEST MANAGEMENT PARTNERS X, LLC |
| By: | Karen A. Wilson, Power of Attorney |
|  | Attorney-in-Fact |
| By: | /s/ Keval Desai by Karen A. Wilson, Power of Attorney |
| Name: | Keval Desai |
| By: | /s/ Gilbert H. Kliman by Karen A. Wilson, Power of Attorney |
| Name: | Gilbert H. Kliman |
| By: | /s/ Khaled A. Nasr |
| Name: | Khaled A. Nasr |

---