# EDGAR Filing Document

**Accession Number:** 0001806952
**File Stem:** 0001168404-26-000021
**Filing Date:** 2026-5
**Character Count:** 12162
**Document Hash:** 83dda91775d92d9ed656b8feaa680372
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001168404-26-000021.hdr.sgml**: 20260508

**ACCESSION NUMBER**: 0001168404-26-000021

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

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260508

**DATE AS OF CHANGE**: 20260508

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Lyell Immunopharma, Inc.
- **CENTRAL INDEX KEY:** 0001806952
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 833006753
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-93402
- **FILM NUMBER:** 26958750

**BUSINESS ADDRESS:**
- **STREET 1:** 201 HASKINS WAY
- **CITY:** SOUTH SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94080
- **BUSINESS PHONE:** 650 695-0677

**MAIL ADDRESS:**
- **STREET 1:** 201 HASKINS WAY
- **CITY:** SOUTH SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94080
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Explore Investments LLC/DE
- **CENTRAL INDEX KEY:** 0002082302

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

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

**BUSINESS ADDRESS:**
- **STREET 1:** 251 LITTLE FALLS DRIVE
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19808
- **BUSINESS PHONE:** 302-636-5401

**MAIL ADDRESS:**
- **STREET 1:** 251 LITTLE FALLS DRIVE
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19808

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

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**(Amendment No. 1)**

**Issuer:** Lyell Immunopharma, Inc.

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

**CUSIP Number:** —

**Date of Event Which Requires Filing of this Statement:** 03/31/2026

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

- [ ] Rule 13d-1(b)

- [x] Rule 13d-1(c)

- [ ] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>Explore Investments LLC | Names of Reporting Persons<br>Explore Investments LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>DE | Citizenship or Place of Organization<br>DE |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>1529054.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>1529054.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1529054.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1529054.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>6.6% | Percent of Class Represented by Amount in Row (9)<br>6.6% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

**Comment for Type of Reporting Person:** The percentage reported in Row 11 is calculated in accordance with Rule 13(d)-3(d)(1)(i) promulgated under the Securities Exchange Act of 1934 (as amended, the "Exchange Act") and based on an aggregate total of 23,328,390 shares of the common stock of Lyell Pharmaceuticals, Inc. (the "Issuer") outstanding as of March 31, 2026, as reported by the Issuer in its preliminary prospectus (the "Prospectus") (File No. 333-294884) dated April 3, 2026, incorporated in the Issuer's Form S-3 registration statement filed with the Securities and Exchange Commission (the "SEC") on April 3, 2026.

---

| 1. | Names of Reporting Persons<br>Jeffrey P. Bezos | Names of Reporting Persons<br>Jeffrey P. Bezos |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>X1 | Citizenship or Place of Organization<br>X1 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>1529054.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>1529054.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1529054.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1529054.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>6.6% | Percent of Class Represented by Amount in Row (9)<br>6.6% |
| 12. | Type of Reporting Person (See Instructions)<br>IN | Type of Reporting Person (See Instructions)<br>IN |

**Comment for Type of Reporting Person:** For purposes of Rule 13d-3 under the Exchange Act, all shares of the Issuer's common stock held by Explore may be deemed to be beneficially owned by Jeffrey P. Bezos as the sole member of Explore.

The percentage reported in Row 11 is calculated in accordance with Rule 13(d)-3(d)(1)(i) promulgated under the Exchange Act and based on an aggregate total of 23,328,390 shares of the Issuer's common stock outstanding as of March 31, 2026, as reported by the Issuer in the Prospectus.

---

**Item 1(a). Name of Issuer:**
Lyell Immunopharma, Inc.

**Item 1(b). Address of Issuer's Principal Executive Offices:**
201 Haskins Way, South San Francisco, CA, 94080.

**Item 2(a). Name of Person Filing:**
Explore Investments LLC, a Delaware limited liability company ("Explore")
Jeffrey P. Bezos, an Individual ("Mr. Bezos" and together with Explore, the "Reporting Persons")

**Item 2(b). Address of Principal Business Office:**
The address of the principal business office of each of the Reporting Persons is:

P.O. Box 6470
Surfside, FL 33154

**Item 2(c). Citizenship:**
Explore is formed in the State of Delaware.  Mr. Bezos is a citizen of the United States of America.

**Item 2(d). Title of Class of Securities:**
Common Stock, par value $0.0001 per share

**Item 2(e). CUSIP Number:**
—

**Item 3. If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:**

(a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d) [ ] Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e) [ ] An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f) [ ] An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g) [ ] A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h) [ ] A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j) [ ] A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), if filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:

(k) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

**Item 4. Ownership:**

**(a) Amount beneficially owned:**

Reference to "beneficial ownership" of securities for purposes of this amendment 1 to the statement on Schedule 13G (this "Statement") shall be understood to refer to beneficial ownership as that term is defined in Rule 13d-3 of the Securities Exchange Act of 1934, as amended (the "Exchange Act").
As of March 31, 2026, the Reporting Persons may each be deemed to directly or indirectly beneficially own an aggregate 1,529,054 shares of the Issuer's common stock.
Explore is the direct holder of all the shares identified in the preceding paragraph.  For purposes of Rule 13d-3 under the Exchange Act, all of the aforementioned securities of the Issuer directly held by Explore may be deemed to be beneficially owned by Mr. Bezos as the sole member of Explore.  Notwithstanding, the filing of this Statement shall not be construed as an admission by Mr. Bezos, for purposes of Sections 13(d) or 13(g) of the Exchange Act or otherwise, as to beneficial ownership of the securities reported herein.

**(b) Percent of class:**

As of March 31, 2026, the Reporting Persons were each deemed to directly or indirectly beneficially own an aggregate 6.6% of the Issuer's outstanding common stock.
The aforementioned percentage was calculated in accordance with Rule 13(d)-3(d)(1)(i) promulgated under the Exchange Act and based on an aggregate total of 23,328,390 shares of the Issuer's common stock outstanding as of March 31, 2026, as reported by the Issuer in its preliminary prospectus (the "Prospectus") (File No. 333-294884) dated April 3, 2026, incorporated in the Issuer's Form S-3 registration statement filed with the SEC on April 3, 2026.

**(c) Number of shares as to which the person has:**

**(i) Sole power to vote or to direct the vote:**

Explore			0
Mr. Bezos		0

**(ii) Shared power to vote or to direct the vote:**

Explore			1,529,054
Mr. Bezos		1,529,054

**(iii) Sole power to dispose or to direct the disposition of:**

Explore			0
Mr. Bezos		0

**(iv) Shared power to dispose or to direct the disposition of:**

Explore			1,529,054
Mr. Bezos		1,529,054

**Item 5. Ownership of Five Percent or Less of a Class.**

[x] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

Not Applicable

**Item 7. Identification and Classification of the Subsidiary**

Not Applicable

**Item 8. Identification and Classification of Members of the Group**

Not Applicable

**Item 9. Notice of Dissolution of Group**

Not Applicable

**Item 10. Certification:**

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

### 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.

**Explore Investments LLC**

**Date:** 05/08/2026

**By:** /s/ Paul Dauber

**Name & Title:** Paul Dauber/its Manager

**Jeffrey P. Bezos**

**Date:** 05/08/2026

**By:** /s/ Jeffrey P. Bezos

**Name & Title:** Jeffrey P. Bezos/an Individual