David Tsao sold $2.2M of BillionToOne stock

By AlphaYouPublished Nov 5, 2026Form 4

Stocks in this disclosure

Reported activity

Tsao David

Reporting filer

David Tsao reported selling 20,000 shares of BillionToOne, Inc. for about $2.2M ($109.24 a share on average). Form 4 filed Nov 5, 2026 lists 18 entries.

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Disclosed: Nov 5, 2026

Reported details

18 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	2026-11-02	M	Exercise or conversion	10000	2.80	11,000	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 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	2026-11-02	M	Exercise or conversion	10000	2.80	21,000	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 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	2026-11-02	S	Sale	917	107.3129	20,083	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 917 transaction Price Per Share: 107.3129 id: F2 transaction Acquired Disposed Code: D shares Owned Following Transaction: 20083 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	2320	108.2354	17,763	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 2320 transaction Price Per Share: 108.2354 id: F3 transaction Acquired Disposed Code: D shares Owned Following Transaction: 17763 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	3241	109.0441	14,522	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 3241 transaction Price Per Share: 109.0441 id: F4 transaction Acquired Disposed Code: D shares Owned Following Transaction: 14522 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	1992	110.129	12,530	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 1992 transaction Price Per Share: 110.129 id: F5 transaction Acquired Disposed Code: D shares Owned Following Transaction: 12530 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	1130	110.7704	11,400	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 1130 transaction Price Per Share: 110.7704 id: F6 transaction Acquired Disposed Code: D shares Owned Following Transaction: 11400 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	300	112.19	11,100	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 300 transaction Price Per Share: 112.19 id: F7 transaction Acquired Disposed Code: D shares Owned Following Transaction: 11100 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	100	113.165	11,000	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 100 transaction Price Per Share: 113.165 transaction Acquired Disposed Code: D shares Owned Following Transaction: 11000 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	1063	107.3322	9,937	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 1063 transaction Price Per Share: 107.3322 id: F8 transaction Acquired Disposed Code: D shares Owned Following Transaction: 9937 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	2450	108.3851	7,487	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 2450 transaction Price Per Share: 108.3851 id: F9 transaction Acquired Disposed Code: D shares Owned Following Transaction: 7487 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	3234	109.1527	4,253	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 3234 transaction Price Per Share: 109.1527 id: F10 transaction Acquired Disposed Code: D shares Owned Following Transaction: 4253 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	2389	110.3056	1,864	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 2389 transaction Price Per Share: 110.3056 id: F11 transaction Acquired Disposed Code: D shares Owned Following Transaction: 1864 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	633	111.1379	1,231	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 633 transaction Price Per Share: 111.1379 id: F12 transaction Acquired Disposed Code: D shares Owned Following Transaction: 1231 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	208	112.0125	1,023	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 208 transaction Price Per Share: 112.0125 id: F13 transaction Acquired Disposed Code: D shares Owned Following Transaction: 1023 direct Or Indirect Ownership: D
Class A Common Stock	Tsao David	2026-11-02	S	Sale	23	113.165	1,000	3 days	Filed terms security Title: Class A Common Stock transaction Date: 2026-11-02 transaction Form Type: 4 transaction Code: S equity Swap Involved: 0 id: F1 transaction Shares: 23 transaction Price Per Share: 113.165 transaction Acquired Disposed Code: D shares Owned Following Transaction: 1000 direct Or Indirect Ownership: D
Stock Option (right to buy) (derivative)	Tsao David	2026-11-02	M	Exercise or conversion	10000	2.80	526,667	3 days	Filed terms security Title: Stock Option (right to buy) conversion Or Exercise Price: 2.80 transaction Date: 2026-11-02 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: F14 expiration Date: 2031-06-07 underlying Security Title: Class A Common Stock underlying Security Shares: 10000 shares Owned Following Transaction: 526667 direct Or Indirect Ownership: D
Stock Option (right to buy) (derivative)	Tsao David	2026-11-02	M	Exercise or conversion	10000	2.80	516,667	3 days	Filed terms security Title: Stock Option (right to buy) conversion Or Exercise Price: 2.80 transaction Date: 2026-11-02 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: F14 expiration Date: 2031-06-07 underlying Security Title: Class A Common Stock underlying Security Shares: 10000 shares Owned Following Transaction: 516667 direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: M
Action: Exercise or conversion
Quantity: 10000
Price: 2.80
Following holdings: 11,000
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
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: 2026-11-02
Code: M
Action: Exercise or conversion
Quantity: 10000
Price: 2.80
Following holdings: 21,000
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
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: 2026-11-02
Code: S
Action: Sale
Quantity: 917
Price: 107.3129
Following holdings: 20,083
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 917
transaction Price Per Share: 107.3129
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 20083
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 2320
Price: 108.2354
Following holdings: 17,763
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2320
transaction Price Per Share: 108.2354
id: F3
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 17763
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 3241
Price: 109.0441
Following holdings: 14,522
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 3241
transaction Price Per Share: 109.0441
id: F4
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 14522
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 1992
Price: 110.129
Following holdings: 12,530
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1992
transaction Price Per Share: 110.129
id: F5
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 12530
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 1130
Price: 110.7704
Following holdings: 11,400
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1130
transaction Price Per Share: 110.7704
id: F6
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 11400
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 300
Price: 112.19
Following holdings: 11,100
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 300
transaction Price Per Share: 112.19
id: F7
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 11100
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 100
Price: 113.165
Following holdings: 11,000
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 100
transaction Price Per Share: 113.165
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 11000
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 1063
Price: 107.3322
Following holdings: 9,937
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1063
transaction Price Per Share: 107.3322
id: F8
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 9937
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 2450
Price: 108.3851
Following holdings: 7,487
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2450
transaction Price Per Share: 108.3851
id: F9
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 7487
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 3234
Price: 109.1527
Following holdings: 4,253
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 3234
transaction Price Per Share: 109.1527
id: F10
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 4253
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 2389
Price: 110.3056
Following holdings: 1,864
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2389
transaction Price Per Share: 110.3056
id: F11
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1864
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 633
Price: 111.1379
Following holdings: 1,231
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 633
transaction Price Per Share: 111.1379
id: F12
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1231
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 208
Price: 112.0125
Following holdings: 1,023
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 208
transaction Price Per Share: 112.0125
id: F13
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1023
direct Or Indirect Ownership: D

Class A Common Stock

Owner: Tsao David
Date: 2026-11-02
Code: S
Action: Sale
Quantity: 23
Price: 113.165
Following holdings: 1,000
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 23
transaction Price Per Share: 113.165
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: 2026-11-02
Code: M
Action: Exercise or conversion
Quantity: 10000
Price: 2.80
Following holdings: 526,667
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Stock Option (right to buy)
conversion Or Exercise Price: 2.80
transaction Date: 2026-11-02
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: F14
expiration Date: 2031-06-07
underlying Security Title: Class A Common Stock
underlying Security Shares: 10000
shares Owned Following Transaction: 526667
direct Or Indirect Ownership: D

Stock Option (right to buy) (derivative)

Owner: Tsao David
Date: 2026-11-02
Code: M
Action: Exercise or conversion
Quantity: 10000
Price: 2.80
Following holdings: 516,667
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Stock Option (right to buy)
conversion Or Exercise Price: 2.80
transaction Date: 2026-11-02
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: F14
expiration Date: 2031-06-07
underlying Security Title: Class A Common Stock
underlying Security Shares: 10000
shares Owned Following Transaction: 516667
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 $106.620 to $107.595 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 $107.635 to $108.610 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 $108.650 to $109.640 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 $109.650 to $110.640 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 $110.650 to $111.320 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 $111.950 to $112.370 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 $106.750 to $107.635 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 $107.785 to $108.750 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 $108.790 to $109.775 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 reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.800 to $110.785 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.
F12: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.840 to $111.730 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.
F13: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $111.950 to $112.080 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.
F14: 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

2026-11-02

Exercise or conversion

10000

2.80

11,000

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
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

2026-11-02

Exercise or conversion

10000

2.80

21,000

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
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

2026-11-02

Sale

917

107.3129

20,083

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 917
transaction Price Per Share: 107.3129
id: F2
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 20083
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

2320

108.2354

17,763

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2320
transaction Price Per Share: 108.2354
id: F3
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 17763
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

3241

109.0441

14,522

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 3241
transaction Price Per Share: 109.0441
id: F4
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 14522
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

1992

110.129

12,530

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1992
transaction Price Per Share: 110.129
id: F5
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 12530
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

1130

110.7704

11,400

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1130
transaction Price Per Share: 110.7704
id: F6
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 11400
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

300

112.19

11,100

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 300
transaction Price Per Share: 112.19
id: F7
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 11100
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

100

113.165

11,000

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 100
transaction Price Per Share: 113.165
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 11000
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

1063

107.3322

9,937

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 1063
transaction Price Per Share: 107.3322
id: F8
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 9937
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

2450

108.3851

7,487

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2450
transaction Price Per Share: 108.3851
id: F9
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 7487
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

3234

109.1527

4,253

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 3234
transaction Price Per Share: 109.1527
id: F10
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 4253
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

2389

110.3056

1,864

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 2389
transaction Price Per Share: 110.3056
id: F11
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1864
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

633

111.1379

1,231

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 633
transaction Price Per Share: 111.1379
id: F12
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1231
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

208

112.0125

1,023

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 208
transaction Price Per Share: 112.0125
id: F13
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1023
direct Or Indirect Ownership: D

Class A Common Stock

Tsao David

2026-11-02

Sale

113.165

1,000

3 days

Filed terms

security Title: Class A Common Stock
transaction Date: 2026-11-02
transaction Form Type: 4
transaction Code: S
equity Swap Involved: 0
id: F1
transaction Shares: 23
transaction Price Per Share: 113.165
transaction Acquired Disposed Code: D
shares Owned Following Transaction: 1000
direct Or Indirect Ownership: D

Stock Option (right to buy) (derivative)

Tsao David

2026-11-02

Exercise or conversion

10000

2.80

526,667

3 days

Filed terms

security Title: Stock Option (right to buy)
conversion Or Exercise Price: 2.80
transaction Date: 2026-11-02
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: F14
expiration Date: 2031-06-07
underlying Security Title: Class A Common Stock
underlying Security Shares: 10000
shares Owned Following Transaction: 526667
direct Or Indirect Ownership: D

Stock Option (right to buy) (derivative)

Tsao David

2026-11-02

Exercise or conversion

10000

2.80

516,667

3 days

Filed terms

security Title: Stock Option (right to buy)
conversion Or Exercise Price: 2.80
transaction Date: 2026-11-02
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: F14
expiration Date: 2031-06-07
underlying Security Title: Class A Common Stock
underlying Security Shares: 10000
shares Owned Following Transaction: 516667
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 $106.620 to $107.595 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 $107.635 to $108.610 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 $108.650 to $109.640 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 $109.650 to $110.640 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 $110.650 to $111.320 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 $111.950 to $112.370 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 $106.750 to $107.635 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 $107.785 to $108.750 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 $108.790 to $109.775 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 reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.800 to $110.785 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.

F12: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.840 to $111.730 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.

F13: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $111.950 to $112.080 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.

F14: The options are fully vested and exercisable.