Timothy A. Springer

Insider Reports History

Reporting-owner location: Chestnut Hill, MA
Latest reporting-owner signature: /s/ Daniel Lochner, Attorney-in-Fact
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.

Reported holdings for Timothy A. Springer

Form 4 holding Director, 10%+ Owner

Cartesian Therapeutics, Inc.

Security class: Common Stock
Shares / value: 8,646,285
Estimated value: $73,061,108
Report date: 02 Jan 2026
Price: $8.45
Ownership: Direct

Form 4 holding Director, 10%+ Owner

Tectonic Therapeutic, Inc.

Security class: Common Stock
Shares / value: 4,334,846
Estimated value: $70,701,338
Report date: 11 Apr 2025
Price: $16.31
Ownership: Direct

Form 4 holding Director, 10%+ Owner

Tectonic Therapeutic, Inc.

Security class: Common Stock
Shares / value: 1,503,358
Estimated value: $24,519,769
Report date: 11 Apr 2025
Price: $16.31
Ownership: By LLC

Form 4 holding Director, 10%+ Owner

Cartesian Therapeutics, Inc.

Security class: Common Stock
Shares / value: 656,513
Estimated value: $5,547,534
Report date: 02 Jan 2026
Price: $8.45
Ownership: Indirect

Form 4 holding Director, 10%+ Owner

Tectonic Therapeutic, Inc.

Security class: Common Stock
Shares / value: 186,134
Estimated value: $3,035,846
Report date: 09 Apr 2025
Price: $16.31
Ownership: By Spouse

Form 4 holding Director, 10%+ Owner

Cartesian Therapeutics, Inc.

Security class: Common Stock
Shares / value: 330,695
Estimated value: $2,794,372
Report date: 02 Jan 2026
Price: $8.45
Ownership: By wife

Form 4 holding Director, 10%+ Owner

Cartesian Therapeutics, Inc.

Security class: Stock Option (Right to Buy)
Shares / value: 7,800
Estimated value: $6,162
Report date: 02 Jan 2026
Price: $0.7900
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 7,600

Form 4 holding Director, 10%+ Owner

Morphic Holding, Inc.

Security class: Common Stock
Shares / value: 0
Estimated value: $0
Report date: 16 Aug 2024
Price: $55.79
Ownership: By Spouse

Form 4 holding Director, 10%+ Owner

Morphic Holding, Inc.

Security class: Common Stock
Shares / value: 0
Estimated value: $0
Report date: 16 Aug 2024
Price: $55.79
Ownership: Direct

Form 4 holding Director, 10%+ Owner

Morphic Holding, Inc.

Security class: Common Stock
Shares / value: 0
Estimated value: $0
Report date: 16 Aug 2024
Price: $55.79
Ownership: See TAS Partners LLC

Form 4 holding Director, 10%+ Owner

Tectonic Therapeutic, Inc.

Security class: Stock Option (Right to Buy)
Shares / value: 10,200
Estimated value
Report date: 09 Jun 2026
Price
Ownership: Direct
Underlying class: Common Stock
Underlying amount

Form 4 holding Director, 10%+ Owner

Morphic Holding, Inc.

Security class: Stock Option (Right to Buy)
Shares / value: 0
Estimated value
Report date: 16 Aug 2024
Price
Ownership: Direct
Underlying class: Common Stock
Underlying amount

Insider Reports Filed by Timothy A. Springer

4 TECX

Tectonic Therapeutic, Inc.

Report period: 09 Jun 2026
Transactions: 1
Transaction value: $0
Accepted by SEC: 10 Jun 2026, 16:45
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 02 Jan 2026
Transactions: 2
Transaction value: $0
Accepted by SEC: 06 Jan 2026, 16:18
Role: Director, 10%+ Owner
Next action: Open filing details

4 TECX

Tectonic Therapeutic, Inc.

Report period: 09 Jun 2025
Transactions: 1
Transaction value: $0
Accepted by SEC: 11 Jun 2025, 16:30
Role: Director, 10%+ Owner
Next action: Open filing details

4 TECX

Tectonic Therapeutic, Inc.

Report period: 09 Apr 2025
Transactions: 8
Transaction value: +$2,299,015
Accepted by SEC: 11 Apr 2025, 18:12
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 09 Apr 2025
Transactions: 10
Transaction value: +$1,522,517
Accepted by SEC: 11 Apr 2025, 17:29
Role: Director, 10%+ Owner
Next action: Open filing details

4 TECX

Tectonic Therapeutic, Inc.

Report period: 07 Apr 2025
Transactions: 2
Transaction value: +$8,550,000
Accepted by SEC: 09 Apr 2025, 17:38
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 18 Mar 2025
Transactions: 3
Transaction value: +$1,371,154
Accepted by SEC: 20 Mar 2025, 19:50
Role: Director, 10%+ Owner
Next action: Open filing details

4 TECX

Tectonic Therapeutic, Inc.

Report period: 05 Feb 2025
Transactions: 2
Transaction value: +$39,999,977
Accepted by SEC: 07 Feb 2025, 16:21
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 13 Jan 2025
Transactions: 3
Transaction value: +$366,354
Accepted by SEC: 15 Jan 2025, 16:08
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 02 Jan 2025
Transactions: 2
Transaction value: $0
Accepted by SEC: 06 Jan 2025, 16:19
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 19 Dec 2024
Transactions: 5
Transaction value: +$965,021
Accepted by SEC: 23 Dec 2024, 17:20
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 14 Nov 2024
Transactions: 5
Transaction value: +$7,373,527
Accepted by SEC: 18 Nov 2024, 19:35
Role: Director, 10%+ Owner
Next action: Open filing details

4 TECX

Tectonic Therapeutic, Inc.

Report period: 22 Oct 2024
Transactions: 1
Transaction value: +$10,077,000
Accepted by SEC: 24 Oct 2024, 17:04
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 02 Oct 2024
Transactions: 16
Transaction value: +$4,293,545
Accepted by SEC: 04 Oct 2024, 17:58
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 25 Sep 2024
Transactions: 6
Transaction value: $0
Accepted by SEC: 27 Sep 2024, 16:13
Role: Director, 10%+ Owner
Next action: Open filing details

4 TECX

Tectonic Therapeutic, Inc.

Report period: 24 Sep 2024
Transactions: 7
Transaction value: +$1,440,829
Accepted by SEC: 26 Sep 2024, 18:15
Role: Director, 10%+ Owner
Next action: Open filing details

Morphic Holding, Inc.

Report period: 16 Aug 2024
Transactions: 11
Transaction value: $0
Accepted by SEC: 20 Aug 2024, 19:10
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 12 Aug 2024
Transactions: 1
Transaction value: +$101,968
Accepted by SEC: 14 Aug 2024, 16:43
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 02 Jul 2024
Transactions: 3
Transaction value: +$47,190,000
Accepted by SEC: 05 Jul 2024, 16:02
Role: Director, 10%+ Owner
Next action: Open filing details

4 TECX

Tectonic Therapeutic, Inc.

Report period: 20 Jun 2024
Transactions: 3
Transaction value: $0
Accepted by SEC: 24 Jun 2024, 16:30
Role: Director, 10%+ Owner
Next action: Open filing details

3 TECX

Tectonic Therapeutic, Inc.

Report period: 20 Jun 2024
Transactions: 0
Transaction value: $0
Accepted by SEC: 24 Jun 2024, 16:29
Role: Director, 10%+ Owner
Next action: Open filing details

Morphic Holding, Inc.

Report period: 04 Jun 2024
Transactions: 1
Transaction value: $0
Accepted by SEC: 05 Jun 2024, 19:14
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 08 Apr 2024
Transactions: 4
Transaction value: $0
Accepted by SEC: 10 Apr 2024, 21:40
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 26 Mar 2024
Transactions: 2
Transaction value: +$2,876,847
Accepted by SEC: 26 Mar 2024, 16:32
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 18 Mar 2024
Transactions: 1
Transaction value: +$11,398
Accepted by SEC: 20 Mar 2024, 17:09
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 14 Mar 2024
Transactions: 2
Transaction value: +$666,222
Accepted by SEC: 18 Mar 2024, 17:29
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 17 Jan 2024
Transactions: 10
Transaction value: +$11,442
Accepted by SEC: 28 Mar 2024, 17:11
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 02 Jan 2024
Transactions: 2
Transaction value: $0
Accepted by SEC: 04 Jan 2024, 17:06
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

Cartesian Therapeutics, Inc.

Report period: 13 Nov 2023
Transactions: 9
Transaction value: +$59,930,248
Accepted by SEC: 15 Nov 2023, 17:20
Role: Director, 10%+ Owner
Next action: Open filing details

Morphic Holding, Inc.

Report period: 28 Jun 2023
Transactions: 2
Transaction value: $0
Accepted by SEC: 30 Jun 2023, 19:03
Role: Director, 10%+ Owner
Next action: Open filing details

Morphic Holding, Inc.

Report period: 01 Jun 2023
Transactions: 1
Transaction value: $0
Accepted by SEC: 02 Jun 2023, 19:02
Role: Director, 10%+ Owner
Next action: Open filing details

Morphic Holding, Inc.

Report period: 03 May 2023
Transactions: 1
Transaction value: +$47,250,000
Accepted by SEC: 04 May 2023, 19:06
Role: Director, 10%+ Owner
Next action: Open filing details

Morphic Holding, Inc.

Report period: 13 Feb 2023
Transactions: 2
Transaction value: +$29,999,954
Accepted by SEC: 13 Feb 2023, 15:14
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

SELECTA BIOSCIENCES INC

Report period: 02 Jan 2023
Transactions: 1
Transaction value: $0
Accepted by SEC: 04 Jan 2023, 15:59
Role: Director, 10%+ Owner
Next action: Open filing details

Morphic Holding, Inc.

Report period: 08 Jun 2022
Transactions: 1
Transaction value: $0
Accepted by SEC: 10 Jun 2022, 19:00
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

SELECTA BIOSCIENCES INC

Report period: 11 Apr 2022
Transactions: 2
Transaction value: $0
Accepted by SEC: 13 Apr 2022, 21:07
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

SELECTA BIOSCIENCES INC

Report period: 03 Jan 2022
Transactions: 1
Transaction value: $0
Accepted by SEC: 05 Jan 2022, 15:35
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

SELECTA BIOSCIENCES INC

Report period: 15 Dec 2021
Transactions: 1
Transaction value: +$631,099
Accepted by SEC: 17 Dec 2021, 15:36
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

SELECTA BIOSCIENCES INC

Report period: 09 Dec 2021
Transactions: 3
Transaction value: +$11,687,810
Accepted by SEC: 13 Dec 2021, 16:16
Role: Director, 10%+ Owner
Next action: Open filing details

Morphic Holding, Inc.

Report period: 18 Aug 2021
Transactions: 7
Transaction value: +$4,213,155
Accepted by SEC: 20 Aug 2021, 19:08
Role: Director, 10%+ Owner
Next action: Open filing details

4/A

Morphic Holding, Inc.

Report period: 16 Jun 2021
Transactions: 1
Transaction value: $0
Accepted by SEC: 29 Apr 2022, 16:21
Role: Director, 10%+ Owner
Next action: Open filing details

Morphic Holding, Inc.

Report period: 24 May 2021
Transactions: 7
Transaction value: +$6,015,992
Accepted by SEC: 26 May 2021, 19:02
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

SELECTA BIOSCIENCES INC

Report period: 24 May 2021
Transactions: 3
Transaction value: +$7,059,872
Accepted by SEC: 26 May 2021, 17:21
Role: Director, 10%+ Owner
Next action: Open filing details

Morphic Holding, Inc.

Report period: 21 May 2021
Transactions: 1
Transaction value: +$10,569,422
Accepted by SEC: 25 May 2021, 19:03
Role: Director, 10%+ Owner
Next action: Open filing details

4 RNAC

SELECTA BIOSCIENCES INC

Report period: 21 May 2021
Transactions: 1
Transaction value: +$8,847,398
Accepted by SEC: 25 May 2021, 16:27
Role: Director, 10%+ Owner
Next action: Open filing details

Insider Reports History

Continue from this owner filing history

Reported holdings for Timothy A. Springer

Insider Reports Filed by Timothy A. Springer