# EDGAR Filing Document

**Accession Number:** 0001943896
**File Stem:** 0001539061-26-000003
**Filing Date:** 2026-2
**Character Count:** 37570
**Document Hash:** 8b722c1af6f97237b0fcfc322abb542f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001539061-26-000003.hdr.sgml**: 20260217

**ACCESSION NUMBER**: 0001539061-26-000003

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

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260217

**DATE AS OF CHANGE**: 20260217

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Rubrik, Inc.
- **CENTRAL INDEX KEY:** 0001943896
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 464560494
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0131

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-94510
- **FILM NUMBER:** 26644515

**BUSINESS ADDRESS:**
- **STREET 1:** 3495 DEER CREEK ROAD
- **CITY:** PALO ALTO
- **STATE:** CA
- **ZIP:** 94304
- **BUSINESS PHONE:** 8444782745

**MAIL ADDRESS:**
- **STREET 1:** 3495 DEER CREEK ROAD
- **CITY:** PALO ALTO
- **STATE:** CA
- **ZIP:** 94304
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Lightspeed Venture Partners IX, L.P.
- **CENTRAL INDEX KEY:** 0001539061

**ORGANIZATION NAME:**
- **EIN:** 981031932
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

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

**BUSINESS ADDRESS:**
- **STREET 1:** 2200 SAND HILL RAOD
- **CITY:** MENLO PARK
- **STATE:** CA
- **ZIP:** 94025
- **BUSINESS PHONE:** 650-234-8300

**MAIL ADDRESS:**
- **STREET 1:** 2200 SAND HILL RAOD
- **CITY:** MENLO PARK
- **STATE:** CA
- **ZIP:** 94025

## Exhibit 99.1

EXHIBIT 99.1

JOINT FILING AGREEMENT

We, the undersigned, hereby express our agreement that the attached Schedule 13G (or any amendments thereto) relating to the Class A common stock of Rubrik, Inc. on behalf of each of us.

Dated: February 17, 2026

---

| | |
|:---|:---|
| &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;&nbsp;&nbsp;**Lightspeed Venture Partners IX, L.P.**<br>By:<br> Lightspeed General Partner IX, L.P.<br> Its<br> General Partner<br>By:<br> Lightspeed Ultimate General Partner IX, Ltd.<br> Its<br> General Partner<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Director<br>**Lightspeed General Partner IX, L.P.**<br>By:<br> Lightspeed Ultimate General Partner IX, Ltd.<br> Its<br> General Partner<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Director<br>**Lightspeed Ultimate General Partner IX, Ltd.**<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Director<br>**Lightspeed Venture Partners X, L.P.**<br>By:<br> Lightspeed General Partner X, L.P.<br> Its<br> General Partner<br>By:<br> Lightspeed Ultimate General Partner X, Ltd.<br> Its<br> General Partner<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Director<br>**Lightspeed General Partner X, L.P.**<br>By:<br> Lightspeed Ultimate General Partner X, Ltd.<br> Its<br> General Partner<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Director<br>**Lightspeed Ultimate General Partner X, Ltd.**<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Director | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Lightspeed SPV I, LLC**<br> **Lightspeed SPV I-B, LLC**<br> **Lightspeed SPV I-C, LLC**<br>By:<br> LS SPV Management, LLC<br> Its<br> General Partner<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Managing Member<br>**LS SPV Management, LLC**<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Managing Member<br>**Lightspeed Venture Partners Select II, L.P.**<br>By:<br> Lightspeed General Partner Select II, L.P.<br> Its<br> General Partner<br>By:<br> Lightspeed Ultimate General Partner Select II, Ltd.<br> Its<br> General Partner<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Director<br>**Lightspeed General Partner Select II, L.P.**<br>By:<br> Lightspeed Ultimate General Partner Select II, Ltd.<br> Its<br> General Partner<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Director<br>**Lightspeed Ultimate General Partner Select II, Ltd.**<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Director<br>**Lightspeed Management Company, L.L.C.**<br>By:<br> <u>/s/ Ravi Mhatre</u><br> Name: Ravi Mhatre<br> Title: Managing Member<br>|

---

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

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**(Amendment No. 3)**

**Issuer:** RUBRIK, INC.

**Title of Class of Securities:** Class A Common Stock, $0.000025 par value

**CUSIP Number:** 781154109

**Date of Event Which Requires Filing of this Statement:** 12/31/2025

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

- [ ] Rule 13d-1(b)

- [ ] Rule 13d-1(c)

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

---

| 1. | Names of Reporting Persons<br>Lightspeed Venture Partners IX, L.P. | Names of Reporting Persons<br>Lightspeed Venture Partners IX, L.P. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>E9 | Citizenship or Place of Organization<br>E9 |
| 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>4162362.00 |
| 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>4162362.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>4162362.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>4162362.00 |
| 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>2.6% | Percent of Class Represented by Amount in Row (9)<br>2.6% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>Lightspeed General Partner IX, L.P. | Names of Reporting Persons<br>Lightspeed General Partner IX, L.P. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>E9 | Citizenship or Place of Organization<br>E9 |
| 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>4162362.00 |
| 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>4162362.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>4162362.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>4162362.00 |
| 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>2.6% | Percent of Class Represented by Amount in Row (9)<br>2.6% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>Lightspeed Ultimate General Partner IX, Ltd. | Names of Reporting Persons<br>Lightspeed Ultimate General Partner IX, Ltd. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>E9 | Citizenship or Place of Organization<br>E9 |
| 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>4162362.00 |
| 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>4162362.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>4162362.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>4162362.00 |
| 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>2.6% | Percent of Class Represented by Amount in Row (9)<br>2.6% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>Lightspeed SPV I, LLC | Names of Reporting Persons<br>Lightspeed SPV I, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 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>1880593.00 |
| 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>1880593.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1880593.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1880593.00 |
| 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>1.2% | Percent of Class Represented by Amount in Row (9)<br>1.2% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>Lightspeed SPV I-B, LLC | Names of Reporting Persons<br>Lightspeed SPV I-B, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 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>1480133.00 |
| 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>1480133.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1480133.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1480133.00 |
| 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>0.9% | Percent of Class Represented by Amount in Row (9)<br>0.9% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>Lightspeed SPV I-C, LLC | Names of Reporting Persons<br>Lightspeed SPV I-C, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 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>1036018.00 |
| 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>1036018.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1036018.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1036018.00 |
| 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>0.7% | Percent of Class Represented by Amount in Row (9)<br>0.7% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>LS SPV Management, LLC | Names of Reporting Persons<br>LS SPV Management, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 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>4396744.00 |
| 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>4396744.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>4396744.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>4396744.00 |
| 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>2.8% | Percent of Class Represented by Amount in Row (9)<br>2.8% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>Lightspeed Venture Partners Select II, L.P. | Names of Reporting Persons<br>Lightspeed Venture Partners Select II, L.P. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>E9 | Citizenship or Place of Organization<br>E9 |
| 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>966307.00 |
| 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>966307.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>966307.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>966307.00 |
| 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>0.6% | Percent of Class Represented by Amount in Row (9)<br>0.6% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>Lightspeed General Partner Select II, L.P. | Names of Reporting Persons<br>Lightspeed General Partner Select II, L.P. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>E9 | Citizenship or Place of Organization<br>E9 |
| 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>966307.00 |
| 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>966307.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>966307.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>966307.00 |
| 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>0.6% | Percent of Class Represented by Amount in Row (9)<br>0.6% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>Lightspeed Ultimate General Partner Select II, Ltd. | Names of Reporting Persons<br>Lightspeed Ultimate General Partner Select II, Ltd. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>E9 | Citizenship or Place of Organization<br>E9 |
| 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>966307.00 |
| 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>966307.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>966307.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>966307.00 |
| 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>0.6% | Percent of Class Represented by Amount in Row (9)<br>0.6% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>Lightspeed Venture Partners X, L.P. | Names of Reporting Persons<br>Lightspeed Venture Partners X, L.P. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>E9 | Citizenship or Place of Organization<br>E9 |
| 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>0.00 |
| 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>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>0.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>0.00 |
| 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>0.0% | Percent of Class Represented by Amount in Row (9)<br>0.0% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>Lightspeed General Partner X, L.P. | Names of Reporting Persons<br>Lightspeed General Partner X, L.P. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>E9 | Citizenship or Place of Organization<br>E9 |
| 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>0.00 |
| 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>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>0.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>0.00 |
| 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>0.0% | Percent of Class Represented by Amount in Row (9)<br>0.0% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>Lightspeed Ultimate General Partner X, Ltd. | Names of Reporting Persons<br>Lightspeed Ultimate General Partner X, Ltd. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>E9 | Citizenship or Place of Organization<br>E9 |
| 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>0.00 |
| 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>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>0.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>0.00 |
| 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>0.0% | Percent of Class Represented by Amount in Row (9)<br>0.0% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>Lightspeed Management Company, L.L.C. | Names of Reporting Persons<br>Lightspeed Management Company, L.L.C. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [x] |
| 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>0.00 |
| 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>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>0.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>0.00 |
| 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>0.0% | Percent of Class Represented by Amount in Row (9)<br>0.0% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

**Item 1(a). Name of Issuer:**
RUBRIK, INC.

**Item 1(b). Address of Issuer's Principal Executive Offices:**
3495 Deer Creek Road, Palo Alto, CA, 94304.

**Item 2(a). Name of Person Filing:**
The names of the persons filing this report (collectively, the "Reporting Persons") are:

Lightspeed Venture Partners IX, L.P. ("Lightspeed IX")
Lightspeed General Partner IX, L.P. ("LGP IX")
Lightspeed Ultimate General Partner IX, Ltd. ("LUGP IX")
Lightspeed SPV I, LLC ("Lightspeed SPV I")
Lightspeed SPV I-B, LLC ("Lightspeed SPV I-B")
Lightspeed SPV I-C, LLC ("Lightspeed SPV I-C")
LS SPV Management, LLC ("LS SPV")
Lightspeed Venture Partners Select II, L.P. ("Lightspeed Select II")
Lightspeed General Partner Select II, L.P. ("LGP Select II")
Lightspeed Ultimate General Partner Select II, Ltd. ("LUGP Select II")
Lightspeed Venture Partners X, L.P. ("Lightspeed X")
Lightspeed General Partner X, L.P. ("LGP X")
Lightspeed Ultimate General Partner X, Ltd. ("LUGP X")
Lightspeed Management Company, L.L.C. ("LMC")

The Reporting Persons expressly disclaim status as a "group" for purposes of this Schedule 13G/A.

**Item 2(b). Address of Principal Business Office:**
c/o Lightspeed Venture Partners
2200 Sand Hill Road
Menlo Park, CA 94025

**Item 2(c). Citizenship:**
Lightspeed IX		       Cayman Islands
LGP IX			       Cayman Islands
LUGP IX		               Cayman Islands
Lightspeed SPV I	       Delaware
Lightspeed SPV I-B	       Delaware
Lightspeed SPV I-C       Delaware
LS SPV			       Delaware
Lightspeed Select II       Cayman Islands
LGP Select II		       Cayman Islands
LUGP Select II	       Cayman Islands
Lightspeed X		       Cayman Islands
LGP X			       Cayman Islands
LUGP X		               Cayman Islands
LMC	  	       	       Delaware

**Item 2(d). Title of Class of Securities:**
Class A Common Stock, $0.000025 par value

**Item 2(e). CUSIP Number:**
781154109

**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:**

Row 9 of each Reporting Person's cover page to this Schedule 13G/A sets forth the aggregate number of shares of Class A common stock of the Issuer beneficially owned by such Reporting Person as of December 31, 2025 and is incorporated by reference.
The Reporting Persons' ownership of the Issuer's securities consists of (i) 4,162,362 shares of Class B common stock directly held by Lightspeed IX; (ii) 1,880,593 shares of Class B common stock directly held by Lightspeed SPV I; (iii) 1,480,133 shares of Class B common stock directly held by Lightspeed SPV I-B; (iv) 1,036,018 shares of Class B common stock directly held by Lightspeed SPV I-C; and (v) 966,307 shares of Class B common stock directly held by Lightspeed Select II. Collectively, the Reporting Persons beneficially own an aggregate of 9,525,413 shares of Class B common stock.
LUGP IX serves as the sole general partner of LGP IX, which serves as the sole general partner of Lightspeed IX. LS SPV serves as the manager of each of Lightspeed SPV I, Lightspeed SPV I-B and Lightspeed SPV I-C. LUGP Select II serves as the sole general partner of LGP Select II, which serves as the sole general partner of Lightspeed Select II. LUGP X serves as the sole general partner of LGP X, which serves as the sole general partner of Lightspeed X.

**(b) Percent of class:**

Row 11 of each Reporting Person's cover page to this Schedule 13G/A sets forth the percentages of the shares of Class A common stock of the Issuer beneficially owned by such Reporting Person as of December 31, 2025 and is incorporated by reference.
Collectively, the Reporting Persons beneficially own 4.8% of the common stock and 5.8% of the Class A common stock. The foregoing percentages are based upon a total of 200,141,545 shares of common stock (151,894,462 shares of Class A common stock and 48,247,083 shares of Class B common stock) outstanding as of  November 30, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (the "SEC") on December 8, 2025. With respect to the percentage of Class A common stock, the shares outstanding, in each case, has been adjusted in accordance with rules of the SEC, to reflect the issuance of 3,276,798 shares of Class A common stock subsequent to November 30, 2025 upon conversion of shares of Class B common stock by the Reporting Persons and to give effect to the full conversion of Class B common stock beneficially owned by such Reporting Person.

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

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

Row 5 of each Reporting Person's cover page to this Schedule 13G/A sets forth the sole power to vote or to direct the vote of securities of the Issuer beneficially owned by such Reporting Person as of December 31, 2025 and is incorporated by reference.

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

Row 6 of each Reporting Person's cover page to this Schedule 13G/A sets forth the shared power to vote or to direct the vote of securities of the Issuer beneficially owned by such Reporting Person as of December 31, 2025 and is incorporated by reference.

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

Row 7 of each Reporting Person's cover page to this Schedule 13G/A sets forth the sole power to dispose or to direct the disposition of securities of the Issuer beneficially owned by such Reporting Person as of December 31, 2025 and is incorporated by reference.

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

Row 8 of each Reporting Person's cover page to this Schedule 13G/A sets forth the shared power to dispose or to direct the disposition of securities of the Issuer beneficially owned by such Reporting Person as of December 31, 2025 and is incorporated by reference.

**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:**

—

### 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.

**Lightspeed Venture Partners IX, L.P.**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** See Note 1

**Lightspeed General Partner IX, L.P.**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By Lightspeed Ultimate General Partner IX, Ltd., its General Partner, By Ravi Mhatre, Director

**Lightspeed Ultimate General Partner IX, Ltd.**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By Ravi Mhatre, Director

**Lightspeed SPV I, LLC**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By LS SPV Management, LLC, its Manager, By Ravi Mhatre, Managing Member

**Lightspeed SPV I-B, LLC**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By LS SPV Management, LLC, its Manager, By Ravi Mhatre, Managing Member

**Lightspeed SPV I-C, LLC**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By LS SPV Management, LLC, its Manager, By Ravi Mhatre, Managing Member

**LS SPV Management, LLC**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By Ravi Mhatre, Managing Member

**Lightspeed Venture Partners Select II, L.P.**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** See Note 2

**Lightspeed General Partner Select II, L.P.**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By Lightspeed Ultimate General Partner Select II, Ltd., its General Partner, By Ravi Mhatre, Director

**Lightspeed Ultimate General Partner Select II, Ltd.**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By Ravi Mhatre, Director

**Lightspeed Venture Partners X, L.P.**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** See Note 3

**Lightspeed General Partner X, L.P.**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By Lightspeed Ultimate General Partner X, Ltd., its General Partner, By Ravi Mhatre, Director

**Lightspeed Ultimate General Partner X, Ltd.**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By Ravi Mhatre, Director

**Lightspeed Management Company, L.L.C.**

**Date:** 02/17/2026

**By:** /s/ Ravi Mhatre

**Name & Title:** By Ravi Mhatre, Managing Member