Form 4 holding
Chair and CEO, Director
INSMED Inc
- Security class
- Common Stock
- Shares / value
- 233,924
- Estimated value
- $38,251,252
- Report date
- 03 Jun 2026
- Price
- $163.52
- Ownership
- By trust
William Lewis
Insider Reports History
- Reporting-owner location
- Bridgewater, NJ
- Latest reporting-owner signature
- /s/ William Lewis, by Michael A. Smith as Attorney-in-fact
- 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 William Lewis
Form 4 holding
Chair and CEO, Director
INSMED Inc
- Security class
- Common Stock
- Shares / value
- 233,924
- Estimated value
- $38,251,205
- Report date
- 06 Apr 2026
- Price
- $163.52
- Ownership
- By the Katie Procter Dynasty Trust
Form 4 holding
Chair and CEO, Director
INSMED Inc
- Security class
- Common Stock
- Shares / value
- 265,432
- Estimated value
- $27,145,730
- Report date
- 03 Jun 2026
- Price
- $102.27
- Ownership
- Direct
Form 4 holding
Chair and CEO, Director
INSMED Inc
- Security class
- Stock Option (right to buy)
- Shares / value
- 0
- Estimated value
- $3,640,049
- Report date
- 18 Aug 2025
- Price
- $20.49
- Ownership
- By the Katie Procter Dynasty Trust
- Underlying class
- Common Stock
- Underlying amount
Form 4 holding
Director
NewAmsterdam Pharma Co N.V.
- Security class
- Ordinary Shares
- Shares / value
- 10,360
- Estimated value
- $363,586
- Report date
- 07 Jan 2026
- Price
- $35.10
- Ownership
- Direct
Form 4 holding
Chair and CEO, Director
INSMED Inc
- Security class
- Stock Option (right to buy)
- Shares / value
- 17,760
- Estimated value
- Report date
- 18 May 2026
- Price
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
Form 4 holding
Director
NewAmsterdam Pharma Co N.V.
- Security class
- Option (right to buy)
- Shares / value
- 15,300
- Estimated value
- Report date
- 07 Jan 2026
- Price
- Ownership
- Direct
- Underlying class
- Ordinary Shares
- Underlying amount
Insider Reports Filed by William Lewis
4
INSM
INSMED Inc
- Report period
- 03 Jun 2026
- Transactions
- 1
- Transaction value
- -$777,763
- Accepted by SEC
- 05 Jun 2026, 16:12
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 18 May 2026
- Transactions
- 7
- Transaction value
- -$2,718,224
- Accepted by SEC
- 20 May 2026, 16:06
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 13 May 2026
- Transactions
- 1
- Transaction value
- -$1,543,219
- Accepted by SEC
- 15 May 2026, 16:06
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 04 May 2026
- Transactions
- 10
- Transaction value
- -$1,469,442
- Accepted by SEC
- 06 May 2026, 16:11
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 16 Apr 2026
- Transactions
- 8
- Transaction value
- -$1,540,332
- Accepted by SEC
- 17 Apr 2026, 16:43
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 06 Apr 2026
- Transactions
- 7
- Transaction value
- -$1,746,336
- Accepted by SEC
- 08 Apr 2026, 16:41
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 19 Mar 2026
- Transactions
- 7
- Transaction value
- -$1,535,542
- Accepted by SEC
- 20 Mar 2026, 16:05
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 05 Mar 2026
- Transactions
- 8
- Transaction value
- -$1,562,328
- Accepted by SEC
- 05 Mar 2026, 16:16
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 19 Feb 2026
- Transactions
- 9
- Transaction value
- -$1,348,417
- Accepted by SEC
- 23 Feb 2026, 16:34
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 09 Feb 2026
- Transactions
- 7
- Transaction value
- -$1,712,924
- Accepted by SEC
- 11 Feb 2026, 16:42
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 03 Feb 2026
- Transactions
- 1
- Transaction value
- -$470,427
- Accepted by SEC
- 04 Feb 2026, 16:17
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 20 Jan 2026
- Transactions
- 9
- Transaction value
- -$1,433,572
- Accepted by SEC
- 22 Jan 2026, 16:28
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 12 Jan 2026
- Transactions
- 11
- Transaction value
- -$2,980,509
- Accepted by SEC
- 13 Jan 2026, 16:04
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
NAMS
NewAmsterdam Pharma Co N.V.
- Report period
- 07 Jan 2026
- Transactions
- 2
- Transaction value
- $0
- Accepted by SEC
- 09 Jan 2026, 19:34
- Role
- Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 06 Jan 2026
- Transactions
- 3
- Transaction value
- -$1,683,950
- Accepted by SEC
- 08 Jan 2026, 17:20
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 02 Jan 2026
- Transactions
- 2
- Transaction value
- $0
- Accepted by SEC
- 06 Jan 2026, 16:07
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 18 Dec 2025
- Transactions
- 14
- Transaction value
- -$1,519,617
- Accepted by SEC
- 19 Dec 2025, 16:12
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 04 Dec 2025
- Transactions
- 8
- Transaction value
- -$1,933,075
- Accepted by SEC
- 05 Dec 2025, 16:11
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 18 Aug 2025
- Transactions
- 5
- Transaction value
- -$806,985
- Accepted by SEC
- 20 Aug 2025, 16:28
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 04 Aug 2025
- Transactions
- 5
- Transaction value
- -$675,903
- Accepted by SEC
- 06 Aug 2025, 16:21
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 15 Jul 2025
- Transactions
- 5
- Transaction value
- -$625,115
- Accepted by SEC
- 15 Jul 2025, 17:53
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 01 Jul 2025
- Transactions
- 5
- Transaction value
- -$597,506
- Accepted by SEC
- 02 Jul 2025, 16:06
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 16 Jun 2025
- Transactions
- 10
- Transaction value
- -$12,145,359
- Accepted by SEC
- 18 Jun 2025, 16:16
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 02 Jun 2025
- Transactions
- 6
- Transaction value
- -$804,187
- Accepted by SEC
- 04 Jun 2025, 16:40
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 20 May 2025
- Transactions
- 8
- Transaction value
- -$1,812,852
- Accepted by SEC
- 22 May 2025, 17:18
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 15 May 2025
- Transactions
- 2
- Transaction value
- $0
- Accepted by SEC
- 19 May 2025, 17:05
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 13 May 2025
- Transactions
- 3
- Transaction value
- -$1,415,573
- Accepted by SEC
- 15 May 2025, 16:33
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 01 May 2025
- Transactions
- 4
- Transaction value
- -$421,562
- Accepted by SEC
- 02 May 2025, 16:43
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 15 Apr 2025
- Transactions
- 5
- Transaction value
- -$405,071
- Accepted by SEC
- 16 Apr 2025, 16:17
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 01 Apr 2025
- Transactions
- 6
- Transaction value
- -$428,472
- Accepted by SEC
- 03 Apr 2025, 16:25
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 17 Mar 2025
- Transactions
- 10
- Transaction value
- -$1,469,565
- Accepted by SEC
- 19 Mar 2025, 16:53
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 03 Mar 2025
- Transactions
- 14
- Transaction value
- -$1,488,941
- Accepted by SEC
- 05 Mar 2025, 17:27
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 18 Feb 2025
- Transactions
- 10
- Transaction value
- -$1,571,866
- Accepted by SEC
- 20 Feb 2025, 16:52
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 05 Feb 2025
- Transactions
- 2
- Transaction value
- -$6,419,415
- Accepted by SEC
- 07 Feb 2025, 17:11
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 03 Feb 2025
- Transactions
- 12
- Transaction value
- -$1,492,876
- Accepted by SEC
- 05 Feb 2025, 16:44
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 15 Jan 2025
- Transactions
- 10
- Transaction value
- -$2,210,601
- Accepted by SEC
- 16 Jan 2025, 16:37
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 07 Jan 2025
- Transactions
- 5
- Transaction value
- -$995,012
- Accepted by SEC
- 10 Jan 2025, 18:44
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
NAMS
NewAmsterdam Pharma Co N.V.
- Report period
- 06 Jan 2025
- Transactions
- 2
- Transaction value
- $0
- Accepted by SEC
- 08 Jan 2025, 18:03
- Role
- Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 02 Jan 2025
- Transactions
- 6
- Transaction value
- -$1,285,788
- Accepted by SEC
- 03 Jan 2025, 18:52
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 19 Dec 2024
- Transactions
- 8
- Transaction value
- -$1,287,494
- Accepted by SEC
- 20 Dec 2024, 16:25
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 12 Dec 2024
- Transactions
- 10
- Transaction value
- -$1,365,850
- Accepted by SEC
- 13 Dec 2024, 16:16
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 13 May 2024
- Transactions
- 3
- Transaction value
- -$566,493
- Accepted by SEC
- 15 May 2024, 16:34
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 28 Feb 2024
- Transactions
- 2
- Transaction value
- +$629,000
- Accepted by SEC
- 29 Feb 2024, 16:08
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 08 Jan 2024
- Transactions
- 6
- Transaction value
- +$236,090
- Accepted by SEC
- 10 Jan 2024, 16:15
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
NAMS
NewAmsterdam Pharma Co N.V.
- Report period
- 04 Jan 2024
- Transactions
- 1
- Transaction value
- $0
- Accepted by SEC
- 08 Jan 2024, 19:43
- Role
- Director
- Next action
- Open filing details
3
NAMS
NewAmsterdam Pharma Co N.V.
- Report period
- 04 Jan 2024
- Transactions
- 0
- Transaction value
- $0
- Accepted by SEC
- 08 Jan 2024, 19:40
- Role
- Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 04 Jan 2024
- Transactions
- 3
- Transaction value
- -$204,195
- Accepted by SEC
- 05 Jan 2024, 17:29
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 27 Oct 2023
- Transactions
- 16
- Transaction value
- -$1,094,449
- Accepted by SEC
- 31 Oct 2023, 16:04
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 15 May 2023
- Transactions
- 3
- Transaction value
- -$313,312
- Accepted by SEC
- 17 May 2023, 16:11
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 11 May 2023
- Transactions
- 8
- Transaction value
- +$5,820,029
- Accepted by SEC
- 15 May 2023, 16:12
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 10 Jan 2023
- Transactions
- 1
- Transaction value
- -$125,892
- Accepted by SEC
- 12 Jan 2023, 15:10
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 05 Jan 2023
- Transactions
- 3
- Transaction value
- -$138,758
- Accepted by SEC
- 06 Jan 2023, 15:24
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 08 Aug 2022
- Transactions
- 10
- Transaction value
- -$5,084,354
- Accepted by SEC
- 10 Aug 2022, 16:18
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 07 Jul 2022
- Transactions
- 3
- Transaction value
- -$660,840
- Accepted by SEC
- 08 Jul 2022, 16:04
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 16 May 2022
- Transactions
- 2
- Transaction value
- -$183,353
- Accepted by SEC
- 18 May 2022, 16:07
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 11 May 2022
- Transactions
- 2
- Transaction value
- $0
- Accepted by SEC
- 13 May 2022, 18:13
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 23 Mar 2022
- Transactions
- 9
- Transaction value
- -$734,777
- Accepted by SEC
- 25 Mar 2022, 17:40
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 11 Jan 2022
- Transactions
- 1
- Transaction value
- -$72,141
- Accepted by SEC
- 13 Jan 2022, 15:41
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 06 Jan 2022
- Transactions
- 2
- Transaction value
- $0
- Accepted by SEC
- 10 Jan 2022, 16:06
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 05 Jan 2022
- Transactions
- 2
- Transaction value
- -$335,511
- Accepted by SEC
- 07 Jan 2022, 15:25
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 23 Dec 2021
- Transactions
- 9
- Transaction value
- -$1,363,527
- Accepted by SEC
- 28 Dec 2021, 15:08
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 30 Sep 2021
- Transactions
- 4
- Transaction value
- -$2,315,265
- Accepted by SEC
- 01 Oct 2021, 16:10
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 15 May 2021
- Transactions
- 1
- Transaction value
- -$169,997
- Accepted by SEC
- 18 May 2021, 16:32
- Role
- Chair and CEO, Director
- Next action
- Open filing details
4
INSM
INSMED Inc
- Report period
- 12 May 2021
- Transactions
- 2
- Transaction value
- $0
- Accepted by SEC
- 14 May 2021, 17:02
- Role
- Chair and CEO, Director
- Next action
- Open filing details