Form 4 holding
Director
Infleqtion, Inc.
- Security class
- Common Stock
- Shares / value
- 350,115
- Estimated value
- $3,434,628
- Report date
- 29 May 2026
- Price
- $9.81
- Ownership
- Indirect
David B. Singer
Insider Reports History
- Reporting-owner location
- Dallas, TX
- Latest reporting-owner signature
-
/s/ David B. Singer
Source: Latest parsed Forms 3/4/5 signature
- Transaction source note
- Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.
Identity
Names, identifiers, and filing context for this profile.
1 identity field
SEC source record
Original filing metadata and source links for verification.
1 source field
Source evidence
Original filing metadata and source links for verification.
1 source field
Reported holdings for David B. Singer
Form 4 holding
Director
1Life Healthcare Inc
- Security class
- Common Stock
- Shares / value
- 264
- Estimated value
- $4,752
- Report date
- 15 Jul 2021
- Price
- $18.00
- Ownership
- Direct
Form 4 holding
Director
Infleqtion, Inc.
- Security class
- Stock Option (Right to Buy)
- Shares / value
- 33,928
- Estimated value
- Report date
- 10 Apr 2026
- Price
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
Form 4 holding
Director
Seer, Inc.
- Security class
- Stock Option (right to buy)
- Shares / value
- 15,000
- Estimated value
- Report date
- 17 Jun 2021
- Price
- Ownership
- Direct
- Underlying class
- Class A Common Stock
- Underlying amount
Form 4 holding
Director
CASTLIGHT HEALTH, INC.
- Security class
- Class B Common Stock
- Shares / value
- 0
- Estimated value
- Report date
- 17 Feb 2022
- Price
- $1.77
- Ownership
- Direct
Form 4 holding
Director
CASTLIGHT HEALTH, INC.
- Security class
- Director Stock Option (right to buy)
- Shares / value
- 0
- Estimated value
- Report date
- 17 Feb 2022
- Price
- Ownership
- Direct
- Underlying class
- Class B Common Stock
- Underlying amount
Insider Reports Filed by David B. Singer
4
INFQ
Infleqtion, Inc.
- Report period
- 29 May 2026
- Transactions
- 12
- Transaction value
- -$28,939,644
- Accepted by SEC
- 29 May 2026, 20:58
- Role
- Director
- Next action
- Open filing details
4/A
INFQ
Infleqtion, Inc.
- Report period
- 27 May 2026
- Transactions
- 8
- Transaction value
- -$47,602,403
- Accepted by SEC
- 29 May 2026, 21:37
- Role
- Director
- Next action
- Open filing details
4
INFQ
Infleqtion, Inc.
- Report period
- 21 May 2026
- Transactions
- 12
- Transaction value
- -$181,595,287
- Accepted by SEC
- 27 May 2026, 20:10
- Role
- Director
- Next action
- Open filing details
4/A
INFQ
Infleqtion, Inc.
- Report period
- 10 Apr 2026
- Transactions
- 1
- Transaction value
- $0
- Accepted by SEC
- 15 Apr 2026, 16:15
- Role
- Director
- Next action
- Open filing details
4
CCCX
Churchill Capital Corp X/Cayman
- Report period
- 13 Feb 2026
- Transactions
- 2
- Transaction value
- $0
- Accepted by SEC
- 18 Feb 2026, 08:56
- Role
- Director
- Next action
- Open filing details
3
CCCX
Churchill Capital Corp X/Cayman
- Report period
- 13 Feb 2026
- Transactions
- 0
- Transaction value
- $0
- Accepted by SEC
- 18 Feb 2026, 08:35
- Role
- Director
- Next action
- Open filing details
4
CASTLIGHT HEALTH, INC.
- Report period
- 17 Feb 2022
- Transactions
- 2
- Transaction value
- $0
- Accepted by SEC
- 18 Feb 2022, 13:12
- Role
- Director
- Next action
- Open filing details
4
1Life Healthcare Inc
- Report period
- 15 Jul 2021
- Transactions
- 1
- Transaction value
- $0
- Accepted by SEC
- 19 Jul 2021, 18:49
- Role
- Director
- Next action
- Open filing details
4
SEER
Seer, Inc.
- Report period
- 17 Jun 2021
- Transactions
- 1
- Transaction value
- $0
- Accepted by SEC
- 22 Jun 2021, 18:41
- Role
- Director
- Next action
- Open filing details
4
CASTLIGHT HEALTH, INC.
- Report period
- 10 Jun 2021
- Transactions
- 1
- Transaction value
- $0
- Accepted by SEC
- 14 Jun 2021, 19:05
- Role
- Director
- Next action
- Open filing details