Diekman John D (CIK 0001240357)

Latest company ownership

Shares held
1,899,157
Last filed at
Oct 7, 2020
Confidence Score
50.0
2025Q4
Confidence Score History
2019Q4 2025Q4
Shares held
410,268
Last filed at
Oct 11, 2022
Confidence Score
50.0
2025Q4
Confidence Score History
2017Q4 2025Q4
Shares held
384,496
Last filed at
Nov 13, 2020
Confidence Score
50.0
2025Q4
Confidence Score History
2019Q2 2025Q4
QTTB - Q32 Bio Inc.
Role: 10% Owner
Shares held
181,435
Last filed at
Dec 28, 2020
Confidence Score
50.0
2025Q4
Confidence Score History
2018Q4 2025Q4
Shares held
94,489
Last filed at
Jun 25, 2019
Confidence Score
50.0
2025Q4
Confidence Score History
2018Q3 2025Q4
Shares held
66,277
Last filed at
Sep 13, 2024
Confidence Score
44.4
2025Q4
Confidence Score History
2024Q1 2025Q4
ZLAB - Zai Lab Ltd
Role: Director
Shares held
42,019
Last filed at
Feb 14, 2022
Confidence Score
50.0
2025Q4
Confidence Score History
2021Q1 2025Q4
ARVN - ARVINAS, INC.
Role: 10% Owner
Shares held
1,002
Last filed at
Sep 18, 2019
Confidence Score
50.0
2025Q4
Confidence Score History
2019Q1 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Aug 21, 2025 Aug 22, 2025 Skye Bioscience, Inc. 10% Owner Sell 20.0 -231,405 -2.33% ✗ $800.5K
Sep 11, 2024 Sep 13, 2024 Skye Bioscience, Inc. 10% Owner Sell 17.5 -266,337 -2.62% ✗ $1.8M
Mar 13, 2024 Mar 15, 2024 Skye Bioscience, Inc. 10% Owner Buy 92.5 +450,000 4.63% ✗ $4.5M
Jan 31, 2024 Feb 2, 2024 Skye Bioscience, Inc. 10% Owner Buy 100.0 +5,206,074 115.09% ✗ $12M
Oct 6, 2022 Oct 11, 2022 scPharmaceuticals Inc. 10% Owner Sell 17.5 -600,000 -17.99% ✗ $2.5M
Sep 6, 2022 Sep 8, 2022 scPharmaceuticals Inc. 10% Owner Sell 17.5 -226,622 -6.36% ✗ $1.1M
Apr 11, 2022 Apr 13, 2022 scPharmaceuticals Inc. 10% Owner Sell 17.5 -270,000 -7.05% ✗ $1.4M
Mar 4, 2021 Feb 14, 2022 Zai Lab Ltd Director Sell 20.0 -18,833 -13.00% ✗ $500K
Feb 4, 2022 Feb 7, 2022 Zai Lab Ltd Director Sell 45.0 -1,000 -1.46% ✓ $50.2K
Nov 5, 2021 Nov 8, 2021 Zai Lab Ltd Director Sell 45.0 -1,000 -1.62% ✓ $91.7K
Aug 5, 2021 Aug 5, 2021 Zai Lab Ltd Director Sell 45.0 -1,000 -1.59% ✓ $149.5K
May 5, 2021 May 6, 2021 Zai Lab Ltd Director Sell 45.0 -1,000 -1.57% ✓ $153.6K
Dec 22, 2020 Dec 28, 2020 Q32 Bio Inc. 10% Owner Sell 16.3 -500,000 -9.93% ✗ $6.4M
Dec 14, 2020 Dec 16, 2020 Q32 Bio Inc. 10% Owner Sell 16.3 -500,000 -4.58% ✗ $6.1M
Nov 11, 2020 Nov 13, 2020 IDEAYA Biosciences, Inc. 10% Owner Sell 15.0 -800,000 -23.10% ✗ $10.9M
Oct 5, 2020 Oct 7, 2020 Aprea Therapeutics, Inc. Other Sell 17.5 -175,000 -55.82% ✗ $4.4M
Jun 16, 2020 Jun 18, 2020 Aprea Therapeutics, Inc. 10% Owner Sell 17.5 -140,000 -5.95% ✗ $4.7M
Jun 11, 2020 Jun 15, 2020 Aprea Therapeutics, Inc. 10% Owner Sell 16.3 -245,000 -10.82% ✗ $7M
May 19, 2020 May 21, 2020 Aprea Therapeutics, Inc. 10% Owner Sell 16.3 -255,000 -10.12% ✗ $9M
Oct 7, 2019 Oct 9, 2019 Aprea Therapeutics, Inc. 10% Owner Buy 100.0 +333,333 100.00% ✗ $5M
Jun 27, 2019 Jul 1, 2019 ARVINAS, INC. 10% Owner Sell 15.0 -810,000 -9.61% ✗ $17.7M
Jun 21, 2019 Jun 25, 2019 Crinetics Pharmaceuticals, Inc. Other Sell 16.3 -250,000 -9.57% ✗ $5.6M
Jun 7, 2019 Jun 11, 2019 ARVINAS, INC. 10% Owner Sell 17.5 -190,000 -4.11% ✗ $3.7M
May 28, 2019 May 28, 2019 IDEAYA Biosciences, Inc. Director Buy 95.0 +250,000 9.21% ✗ $2.5M
May 16, 2019 May 20, 2019 Q32 Bio Inc. 10% Owner Sell 15.0 -615,000 -10.00% ✗ $13.2M
Mar 28, 2019 Apr 1, 2019 ARVINAS, INC. 10% Owner Sell 16.3 -361,129 -7.24% ✗ $5.1M
Mar 18, 2019 Mar 20, 2019 Crinetics Pharmaceuticals, Inc. 10% Owner Sell 17.5 -154,839 -5.60% ✗ $3.8M
Jan 22, 2019 Jan 24, 2019 Crinetics Pharmaceuticals, Inc. 10% Owner Sell 16.3 -262,153 -7.49% ✗ $5.7M
Dec 10, 2018 Dec 12, 2018 Q32 Bio Inc. 10% Owner Sell 37.5 -15,575 -0.25% ✗ $405K
Nov 23, 2018 Nov 27, 2018 Q32 Bio Inc. 10% Owner Sell 37.5 -29,682 -0.48% ✗ $594.7K
Nov 16, 2018 Nov 20, 2018 Q32 Bio Inc. 10% Owner Sell 15.0 -525,900 -7.82% ✗ $10.6M
Jul 20, 2018 Jul 20, 2018 Crinetics Pharmaceuticals, Inc. 10% Owner Buy 92.5 +115,000 3.40% ✗ $2M
Nov 21, 2017 Nov 21, 2017 scPharmaceuticals Inc. 10% Owner Buy 100.0 +654,762 25.20% ✗ $9.2M