Krishna Kittu Kolluri - 09 Nov 2026 Form 4 Insider Report for BillionToOne, Inc. (BLLN)

Reporting relationship: Director
Issuer ticker: BLLN
Reported as of: 09 Nov 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 12 Nov 2026, 19:52:04 UTC
Prior SEC filing: 28 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Krishna Kittu Kolluri

Filing notes and source

Key filing fact

Krishna Kittu Kolluri filed Form 4 for BillionToOne, Inc. (BLLN) on 12 Nov 2026.

Key facts

This page summarizes Krishna Kittu Kolluri's Form 4 filing for BillionToOne, Inc. (BLLN).
16 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 12 Nov 2026, 19:52.

Change

Previous filing in this sequence was filed on 28 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001270521 Primary reporting owner

KOLLURI KRISHNA KITTU

Relationship: Director
Address: 1300 EL CAMINO REAL, SUITE 100, MENLO PARK
Signature: /s/ Krishna Kittu Kolluri
Signature date: 12 Nov 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: -129,780
Change %: -14%
Price: $0.000000^*
Shares after: 778,679
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F1, F2

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: +7,980
Change %
Price: $0.000000^*
Shares after: 7,980
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F3, F4

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: -7,980
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F4, F5

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: -24,222
Change %: -14%
Price: $0.000000^*
Shares after: 145,328
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F6, F7

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: +3,704
Change %
Price: $0.000000^*
Shares after: 3,704
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F8, F9

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: -3,704
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F9, F10

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: -271,028
Change %: -14%
Price: $0.000000^*
Shares after: 1,626,174
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F11, F12

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: +58,290
Change %
Price: $0.000000^*
Shares after: 58,290
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F13, F14

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: -58,290
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F14, F15

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: -10,921
Change %: -14%
Price: $0.000000^*
Shares after: 65,520
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F16, F17

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: +719
Change %: +33%
Price: $0.000000^*
Shares after: 2,876
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F3, F18

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: +719
Change %: +33%
Price: $0.000000^*
Shares after: 2,876
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F3, F19

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: +5,760
Change %: +10%
Price: $0.000000^*
Shares after: 63,599
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F20, F21

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: +2,302
Change %: +3.6%
Price: $0.000000^*
Shares after: 65,901
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F21, F22

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: +23,316
Change %: +35%
Price: $0.000000^*
Shares after: 89,217
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F21, F23

BLLN transaction

Class A Common Stock

Other

Transaction value
Shares: +5,643
Change %: +6.3%
Price: $0.000000^*
Shares after: 94,860
Date: 09 Nov 2026
Ownership: See footnote
Footnotes: F21, F24

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 24 footnotes

Footnote F1

Represents a pro-rata, in-kind distribution by Neotribe Ignite Fund I, L.P. ("NTIF I") to its partners, for no additional consideration.

Footnote F2

The reported security is directly held by NTIF I. Neotribe Ignite Partners I, LLC ("NTIP I") is the general partner of NTIF I. Krishna Kittu Kolluri ("Kolluri") is the managing member of NTIP I and therefore may be deemed to have voting and dispositive power over the shares held by NTIF I. Kolluri disclaims beneficial ownership of the shares held by NTIF I except to the extent of his pecuniary interest therein.

Footnote F3

The shares were obtained pursuant to a pro-rata, in-kind distribution from NTIF I, for no additional consideration.

Footnote F4

The reported security is directly held by NTIP I. Kolluri is the managing member of NTIP I and therefore may be deemed to have voting and dispositive power over the shares held by NTIP I. Kolluri disclaims beneficial ownership of the shares held by NTIP I except to the extent of his pecuniary interest therein.

Footnote F5

Represents a pro-rata, in-kind distribution by NTIP I to its members and assignees, for no additional consideration.

Footnote F6

Represents a pro-rata, in-kind distribution by Neotribe SPV I BTO, LLC ("NT SPV I") to its members, for no additional consideration.

Footnote F7

The reported security is directly held by NT SPV I. Neotribe Partners SPV I BTO, LLC ("NTP SPV I") is the managing member of NT SPV I. Kolluri is the managing member of NTP SPV I and therefore may be deemed to have voting and dispositive power over the shares held by NT SPV I. Kolluri disclaims beneficial ownership of the shares held by NT SPV I except to the extent of his pecuniary interest therein.

Footnote F8

The shares were obtained pursuant to a pro-rata, in-kind distribution from NT SPV I, for no additional consideration.

Footnote F9

The reported security is directly held by NTP SPV I. Kolluri is the managing member of NTP SPV I and therefore may be deemed to have voting and dispositive power over the shares held by NTP SPV I. Kolluri disclaims beneficial ownership of the shares held by NTP SPV I except to the extent of his pecuniary interest therein.

Footnote F10

Represents a pro-rata, in-kind distribution by NTP SPV I to its members and assignees, for no additional consideration.

Footnote F11

Represents a pro-rata, in-kind distribution by NeoTribe Ventures I, L.P. ("NTV I") to its partners, for no additional consideration.

Footnote F12

The reported security is directly held by NTV I, for itself. NeoTribe Partners I, LLC ("NTP I") is the general partner of NTV I. Kolluri is the managing member of NTP I and therefore may be deemed to hold voting and dispositive power over the shares held by NTV I. Kolluri disclaims beneficial ownership of the shares held by NTV I except to the extent of his pecuniary interest therein.

Footnote F13

The shares were obtained pursuant to a pro-rata, in-kind distribution from NTV I, for no additional consideration.

Footnote F14

The reported security is directly held by NTP I. Kolluri is the managing member of NTP I and therefore may be deemed to have voting and dispositive power over the shares held by NTP I. Kolluri disclaims beneficial ownership of the shares held by NTP I except to the extent of his pecuniary interest therein.

Footnote F15

Represents a pro-rata, in-kind distribution by NTP I to its members and assignees, for no additional consideration.

Footnote F16

Represents a pro-rata, in-kind distribution by NeoTribe Associates I, L.P. ("NTA I") to its partners, for no additional consideration.

Footnote F17

The reported security is directly held by NTV I, as nominee for NTA I. NTP I is the general partner of NTA I. Kolluri is the managing member of NTP I and therefore may be deemed to hold voting and dispositive power over the shares held by NTA I. Kolluri disclaims beneficial ownership of the shares held by NTA I except to the extent of his pecuniary interest therein.

Footnote F18

The reported security is directly held by Ishaan S. Kolluri GST Exempt Trust under the Kolluri 2012 Trust Dtd 11/16/2012, of which Kolluri is a trustee and therefore may be deemed to hold voting and dispositive power over these shares. Kolluri disclaims beneficial ownership of these shares.

Footnote F19

The reported security is directly held by Raina V. Kolluri GST Exempt Trust under the Kolluri 2012 Trust Dtd 11/16/2012, of which Kolluri is a trustee and therefore may be deemed to hold voting and dispositive power over these shares. Kolluri disclaims beneficial ownership of these shares.

Footnote F20

The shares were obtained pursuant to a pro-rata, in-kind distribution from NTIP I, for no additional consideration.

Footnote F21

The reported security is directly held by Kolluri Living Trust dated 11/05/1999, of which Kolluri is a trustee and therefore may be deemed to hold voting and dispositive power over these shares. Kolluri disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

Footnote F22

The shares were obtained pursuant to a pro-rata, in-kind distribution from NTP SPV I, for no additional consideration.

Footnote F23

The shares were obtained pursuant to a pro-rata, in-kind distribution from NTP I, for no additional consideration.

Footnote F24

The shares were obtained pursuant to a pro-rata, in-kind distribution from NTA I, for no additional consideration.