Fund and trust transfers reshape BillionToOne (BLLN) share stake

Rhea-AI Filing Summary

BillionToOne director and ten percent owner Krishna Kittu Kolluri reported multiple internal restructuring transactions involving Class A Common Stock of BillionToOne, Inc. All 16 entries use transaction code J, reflecting other acquisitions or dispositions rather than open-market buys or sells.

The footnotes explain that NeoTribe investment funds, special purpose vehicles, and related entities made pro-rata, in-kind distributions of shares to partners, members, assignees, and family trusts for no additional consideration. The reported securities are held indirectly through these entities, and Kolluri generally disclaims beneficial ownership beyond his pecuniary interest.

Insider Trade Summary

16 transactions reported

Mixed 16 txns

Insider KOLLURI KRISHNA KITTU

Role null

Type	Security	Shares	Price	Value
Other	Class A Common Stock	129,780	$0.00	--
Other	Class A Common Stock	7,980	$0.00	--
Other	Class A Common Stock	7,980	$0.00	--
Other	Class A Common Stock	24,222	$0.00	--
Other	Class A Common Stock	1,425	$0.00	--
Other	Class A Common Stock	1,425	$0.00	--
Other	Class A Common Stock	271,028	$0.00	--
Other	Class A Common Stock	5,423	$0.00	--
Other	Class A Common Stock	5,423	$0.00	--
Other	Class A Common Stock	10,921	$0.00	--
Other	Class A Common Stock	719	$0.00	--
Other	Class A Common Stock	719	$0.00	--
Other	Class A Common Stock	5,761	$0.00	--
Other	Class A Common Stock	1,186	$0.00	--
Other	Class A Common Stock	2,171	$0.00	--
Other	Class A Common Stock	5,644	$0.00	--

Holdings After Transaction: Class A Common Stock — 1,168,019 shares (Indirect, See Footnote)

Footnotes (1)

1. Represents a pro-rata, in-kind distribution by Neotribe Ignite Fund I, L.P. ("NTIF I") to its partners, for no additional consideration. 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. The shares were obtained pursuant to a pro-rata, in-kind distribution from NTIF I, for no additional consideration. 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. Represents a pro-rata, in-kind distribution by NTIP I to its members and assignees, for no additional consideration. Represents a pro-rata, in-kind distribution by Neotribe SPV I BTO, LLC ("NT SPV I") to its members, for no additional consideration. 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. The shares were obtained pursuant to a pro-rata, in-kind distribution from NT SPV I, for no additional consideration. 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. Represents a pro-rata, in-kind distribution by NTP SPV I to its members and assignees, for no additional consideration. Represents a pro-rata, in-kind distribution by NeoTribe Ventures I, L.P. ("NTV I") to its partners, for no additional consideration. 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. The shares were obtained pursuant to a pro-rata, in-kind distribution from NTV I, for no additional consideration. 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. Represents a pro-rata, in-kind distribution by NTP I to its members and assignees, for no additional consideration. Represents a pro-rata, in-kind distribution by NeoTribe Associates I, L.P. ("NTA I") to its partners, for no additional consideration. 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. 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. 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. The shares were obtained pursuant to a pro-rata, in-kind distribution from NTIP I, for no additional consideration. 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. The shares were obtained pursuant to a pro-rata, in-kind distribution from NTP SPV I, for no additional consideration. The shares were obtained pursuant to a pro-rata, in-kind distribution from NTP I, for no additional consideration. The shares were obtained pursuant to a pro-rata, in-kind distribution from NTA I, for no additional consideration.

Key Figures

Restructuring shares: 481,807 shares Largest single restructuring entry: 271,028 shares Second-largest restructuring entry: 129,780 shares +2 more

5 metrics

Restructuring shares 481,807 shares Total shares involved in 16 restructuring transactions (code J)

Largest single restructuring entry 271,028 shares Class A Common Stock, indirect ownership, following balance 2,439,258 shares

Second-largest restructuring entry 129,780 shares Class A Common Stock, indirect ownership, following balance 1,168,019 shares

Medium restructuring entry 24,222 shares Class A Common Stock, indirect ownership, following balance 217,994 shares

Smaller restructuring entry 10,921 shares Class A Common Stock, indirect ownership, following balance 98,283 shares

Key Terms

pro-rata, in-kind distribution, beneficial ownership, pecuniary interest, voting and dispositive power, +1 more

5 terms

pro-rata, in-kind distribution financial

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

beneficial ownership financial

"Kolluri disclaims beneficial ownership of the shares held by NTIF I except to the extent of his pecuniary interest therein."

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"Kolluri disclaims beneficial ownership of the shares held by NTIF I except to the extent of his pecuniary interest therein."

voting and dispositive power financial

"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."

transaction code J financial

"All 16 entries use transaction code J, reflecting other acquisitions or dispositions rather than open-market buys or sells."

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

KOLLURI KRISHNA KITTU

(Last) (First) (Middle)

1300 EL CAMINO REAL, SUITE 100

(Street)

MENLO PARK CALIFORNIA 94025

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
BillionToOne, Inc. [ BLLN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	05/11/2026		J(1)		129,780	D	$0	1,168,019	I	See Footnote(2)
Class A Common Stock	05/11/2026		J(3)		7,980	A	$0	7,980	I	See Footnote(4)
Class A Common Stock	05/11/2026		J(5)		7,980	D	$0	0	I	See Footnote(4)
Class A Common Stock	05/11/2026		J(6)		24,222	D	$0	217,994	I	See Footnote(7)
Class A Common Stock	05/11/2026		J(8)		1,425	A	$0	1,425	I	See Footnote(9)
Class A Common Stock	05/11/2026		J(10)		1,425	D	$0	0	I	See Footnote(9)
Class A Common Stock	05/11/2026		J(11)		271,028	D	$0	2,439,258	I	See Footnote(12)
Class A Common Stock	05/11/2026		J(13)		5,423	A	$0	5,423	I	See Footnote(14)
Class A Common Stock	05/11/2026		J(15)		5,423	D	$0	0	I	See Footnote(14)
Class A Common Stock	05/11/2026		J(16)		10,921	D	$0	98,283	I	See Footnote(17)
Class A Common Stock	05/11/2026		J(3)		719	A	$0	719	I	See Footnote(18)
Class A Common Stock	05/11/2026		J(3)		719	A	$0	719	I	See Footnote(19)
Class A Common Stock	05/11/2026		J(20)		5,761	A	$0	5,761	I	See Footnote(21)
Class A Common Stock	05/11/2026		J(22)		1,186	A	$0	6,947	I	See Footnote(21)
Class A Common Stock	05/11/2026		J(23)		2,171	A	$0	9,118	I	See Footnote(21)
Class A Common Stock	05/11/2026		J(24)		5,644	A	$0	14,762	I	See Footnote(21)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

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

2. 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.

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

4. 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.

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

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

7. 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.

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

9. 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.

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

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

12. 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.

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

14. 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.

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

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

17. 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.

18. 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.

19. 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.

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

21. 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.

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

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

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

Remarks:

This Form 4 is one of two Form 4s filed in respect of the distribution of these shares held of record by NTIF I, NT SPV I, NTV I and NTA I. The Reporting Person for the other Form 4 is NeoTribe Ventures I, L.P.

	Krishna Kittu Kolluri, /s/ Krishna Kittu Kolluri	05/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did Krishna Kittu Kolluri report in the latest Form 4 for BillionToOne (BLLN)?

Kolluri reported 16 restructuring transactions in BillionToOne Class A Common Stock. These were internal transfers coded as “J”, reflecting other acquisitions or dispositions through funds, SPVs, and trusts, rather than open-market buying or selling activity.

Were any BillionToOne (BLLN) shares bought or sold on the market in this Form 4?

No open-market purchases or sales are shown. All transactions use code J, described as other acquisitions or dispositions, arising from pro-rata, in-kind distributions within NeoTribe funds, special purpose vehicles, and related entities, with no additional cash consideration disclosed.

How many BillionToOne (BLLN) shares were affected by the restructuring transactions?

The transaction summary shows 16 restructuring entries covering 481,807 shares. These moves represent internal reallocations among investment funds, SPVs, and trusts associated with Kolluri, rather than traditional market trades or option exercises involving BillionToOne stock.

How are NeoTribe funds involved in Krishna Kittu Kolluri’s BillionToOne (BLLN) holdings?

Footnotes state that entities such as Neotribe Ignite Fund I, NeoTribe Ventures I, and related SPVs directly hold shares. Kolluri is managing member of their general partners and may be deemed to have voting and dispositive power, while generally disclaiming beneficial ownership beyond his pecuniary interest.

Did family trusts receive BillionToOne (BLLN) shares in this Form 4?

Yes. Footnotes describe shares held by the Ishaan S. Kolluri GST Exempt Trust, the Raina V. Kolluri GST Exempt Trust, and the Kolluri Living Trust. These trusts received shares via pro-rata, in-kind distributions, with Kolluri acting as trustee and disclaiming beneficial ownership except for any pecuniary interest.