BLLN: Tsao David sold $2.2M of stock

By AlphaYouPublished Oct 8, 2026Form 4

Stocks in this disclosure

Reported activity

Tsao David

Reporting filer

Tsao David reported selling 20,000 shares of BillionToOne, Inc. for about $2.2M ($108.15 a share on average). Form 4 filed Oct 7, 2026 lists 15 entries.

See the price move since this trade →

Disclosed: Oct 7, 2026

Reported details

15 entries

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Following holdings	Reporting delay	Filed terms and references
Class A Common Stock	Tsao David	2026-10-05	M	Exercise or conversion	10000	2.80	11,000	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 id: F1 transaction Shares: 10000 transaction Price Per Share: 2.80 transaction Acquired Disposed Code: A shares Owned Following Transaction: 11000 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	M	Exercise or conversion	10000	2.80	21,000	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 id: F1 transaction Shares: 10000 transaction Price Per Share: 2.80 transaction Acquired Disposed Code: A shares Owned Following Transaction: 21000 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	866	105.9004	20,134	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 866 transaction Price Per Share: 105.9004 id: F2 transaction Acquired Disposed Code: D shares Owned Following Transaction: 20134 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	1909	107.195	18,225	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 1909 transaction Price Per Share: 107.195 id: F3 transaction Acquired Disposed Code: D shares Owned Following Transaction: 18225 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	4284	108.393	13,941	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 4284 transaction Price Per Share: 108.393 id: F4 transaction Acquired Disposed Code: D shares Owned Following Transaction: 13941 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	2921	109.0031	11,020	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 2921 transaction Price Per Share: 109.0031 id: F5 transaction Acquired Disposed Code: D shares Owned Following Transaction: 11020 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	20	110.08	11,000	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 20 transaction Price Per Share: 110.08 transaction Acquired Disposed Code: D shares Owned Following Transaction: 11000 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	555	105.5587	10,445	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 555 transaction Price Per Share: 105.5587 id: F6 transaction Acquired Disposed Code: D shares Owned Following Transaction: 10445 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	400	106.1038	10,045	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 400 transaction Price Per Share: 106.1038 id: F7 transaction Acquired Disposed Code: D shares Owned Following Transaction: 10045 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	2200	107.4705	7,845	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 2200 transaction Price Per Share: 107.4705 id: F8 transaction Acquired Disposed Code: D shares Owned Following Transaction: 7845 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	4916	108.5342	2,929	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 4916 transaction Price Per Share: 108.5342 id: F9 transaction Acquired Disposed Code: D shares Owned Following Transaction: 2929 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	1829	109.1445	1,100	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 1829 transaction Price Per Share: 109.1445 id: F10 transaction Acquired Disposed Code: D shares Owned Following Transaction: 1100 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-10-05	S	Sale	100	110.09	1,000	2 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 100 transaction Price Per Share: 110.09 transaction Acquired Disposed Code: D shares Owned Following Transaction: 1000 direct Or Indirect Ownership: D
Stock Option (right to buy) (derivative)	Tsao David	2026-10-05	M	Exercise or conversion	10000	2.80	546,667	2 days	Filed terms security Title: Stock Option (right to buy) conversion Or Exercise Price: 2.80 transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Shares: 10000 transaction Price Per Share: 2.80 transaction Acquired Disposed Code: D id: F11 expiration Date: 2031-06-07 underlying Security Title: Class A Common Stock underlying Security Shares: 10000 shares Owned Following Transaction: 546667 direct Or Indirect Ownership: D
Stock Option (right to buy) (derivative)	Tsao David	2026-10-05	M	Exercise or conversion	10000	2.80	536,667	2 days	Filed terms security Title: Stock Option (right to buy) conversion Or Exercise Price: 2.80 transaction Date: 2026-10-05 transaction Form Type: 4 transaction Code: M equity Swap Involved: 0 transaction Shares: 10000 transaction Price Per Share: 2.80 transaction Acquired Disposed Code: D id: F11 expiration Date: 2031-06-07 underlying Security Title: Class A Common Stock underlying Security Shares: 10000 shares Owned Following Transaction: 536667 direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 10000
Price: 2.80
Following holdings: 11,000
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 10000
transaction Price Per Share: 2.80
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 11000
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 10000
Price: 2.80
Following holdings: 21,000
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 10000
transaction Price Per Share: 2.80
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 21000
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 866
Price: 105.9004
Following holdings: 20,134
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 866
transaction Price Per Share: 105.9004
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 20134
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 1909
Price: 107.195
Following holdings: 18,225
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1909
transaction Price Per Share: 107.195
id: F3
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 18225
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 4284
Price: 108.393
Following holdings: 13,941
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 4284
transaction Price Per Share: 108.393
id: F4
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 13941
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 2921
Price: 109.0031
Following holdings: 11,020
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2921
transaction Price Per Share: 109.0031
id: F5
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 11020
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 20
Price: 110.08
Following holdings: 11,000
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 20
transaction Price Per Share: 110.08
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 11000
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 555
Price: 105.5587
Following holdings: 10,445
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 555
transaction Price Per Share: 105.5587
id: F6
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 10445
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 400
Price: 106.1038
Following holdings: 10,045
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 400
transaction Price Per Share: 106.1038
id: F7
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 10045
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 2200
Price: 107.4705
Following holdings: 7,845
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2200
transaction Price Per Share: 107.4705
id: F8
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 7845
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 4916
Price: 108.5342
Following holdings: 2,929
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 4916
transaction Price Per Share: 108.5342
id: F9
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 2929
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 1829
Price: 109.1445
Following holdings: 1,100
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1829
transaction Price Per Share: 109.1445
id: F10
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1100
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-10-05
Code: S
Action: Sale
Quantity: 100
Price: 110.09
Following holdings: 1,000
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 100
transaction Price Per Share: 110.09
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1000
direct Or Indirect Ownership: D

Stock Option (right to buy) (derivative)

Owner: Tsao David
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 10000
Price: 2.80
Following holdings: 546,667
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Stock Option (right to buy)
conversion Or Exercise Price: 2.80
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 10000
transaction Price Per Share: 2.80
transaction Acquired Disposed Code: D
id: F11
expiration Date: 2031-06-07
underlying Security Title: Class A Common Stock
underlying Security Shares: 10000
shares Owned Following Transaction: 546667
direct Or Indirect Ownership: D

Stock Option (right to buy) (derivative)

Owner: Tsao David
Date: 2026-10-05
Code: M
Action: Exercise or conversion
Quantity: 10000
Price: 2.80
Following holdings: 536,667
Reporting delay: 2 days
Filed terms and references: Filed terms
security Title: Stock Option (right to buy)
conversion Or Exercise Price: 2.80
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 10000
transaction Price Per Share: 2.80
transaction Acquired Disposed Code: D
id: F11
expiration Date: 2031-06-07
underlying Security Title: Class A Common Stock
underlying Security Shares: 10000
shares Owned Following Transaction: 536667
direct Or Indirect Ownership: D

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
Tsao David: Chief Technology Officer, Director.
The filing reports a Rule 10b5-1 trading plan.
F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026.
F2: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.505 to $106.350 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F3: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.730 to $107.700 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F4: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.7354 to $108.710 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F5: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.740 to $109.480 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F6: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.880 to $105.720 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F7: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.890 to $106.180 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F8: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.010 to $107.970 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F9: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.040 to $109.030 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F10: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.040 to $109.500 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F11: The options are fully vested and exercisable.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Class A Common Stock

Tsao David

2026-10-05

Exercise or conversion

10000

2.80

11,000

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 10000
transaction Price Per Share: 2.80
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 11000
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Exercise or conversion

10000

2.80

21,000

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
id: F1
transaction Shares: 10000
transaction Price Per Share: 2.80
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 21000
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

866

105.9004

20,134

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 866
transaction Price Per Share: 105.9004
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 20134
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

1909

107.195

18,225

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1909
transaction Price Per Share: 107.195
id: F3
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 18225
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

4284

108.393

13,941

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 4284
transaction Price Per Share: 108.393
id: F4
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 13941
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

2921

109.0031

11,020

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2921
transaction Price Per Share: 109.0031
id: F5
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 11020
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

110.08

11,000

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 20
transaction Price Per Share: 110.08
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 11000
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

555

105.5587

10,445

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 555
transaction Price Per Share: 105.5587
id: F6
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 10445
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

400

106.1038

10,045

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 400
transaction Price Per Share: 106.1038
id: F7
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 10045
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

2200

107.4705

7,845

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2200
transaction Price Per Share: 107.4705
id: F8
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 7845
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

4916

108.5342

2,929

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 4916
transaction Price Per Share: 108.5342
id: F9
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 2929
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

1829

109.1445

1,100

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1829
transaction Price Per Share: 109.1445
id: F10
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1100
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-10-05

Sale

100

110.09

1,000

2 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 100
transaction Price Per Share: 110.09
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1000
direct Or Indirect Ownership: D

Stock Option (right to buy) (derivative)

Tsao David

2026-10-05

Exercise or conversion

10000

2.80

546,667

2 days

Filed terms

security Title: Stock Option (right to buy)
conversion Or Exercise Price: 2.80
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 10000
transaction Price Per Share: 2.80
transaction Acquired Disposed Code: D
id: F11
expiration Date: 2031-06-07
underlying Security Title: Class A Common Stock
underlying Security Shares: 10000
shares Owned Following Transaction: 546667
direct Or Indirect Ownership: D

Stock Option (right to buy) (derivative)

Tsao David

2026-10-05

Exercise or conversion

10000

2.80

536,667

2 days

Filed terms

security Title: Stock Option (right to buy)
conversion Or Exercise Price: 2.80
transaction Date: 2026-10-05
transaction Form Type: 4
transaction Code: M
equity Swap Involved: 0
transaction Shares: 10000
transaction Price Per Share: 2.80
transaction Acquired Disposed Code: D
id: F11
expiration Date: 2031-06-07
underlying Security Title: Class A Common Stock
underlying Security Shares: 10000
shares Owned Following Transaction: 536667
direct Or Indirect Ownership: D

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

Tsao David: Chief Technology Officer, Director.

The filing reports a Rule 10b5-1 trading plan.

F1: The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 5, 2026.

F2: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.505 to $106.350 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $106.730 to $107.700 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F4: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.7354 to $108.710 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F5: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.740 to $109.480 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F6: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $104.880 to $105.720 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F7: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $105.890 to $106.180 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F8: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.010 to $107.970 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F9: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.040 to $109.030 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F10: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.040 to $109.500 per share, inclusive. The holder undertakes to provide, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F11: The options are fully vested and exercisable.