Tzianabos Arthur (CIK 0001586226)

Latest company ownership

Role: Director
Shares held
53,521
Last filed at
Oct 27, 2025
Confidence Score
50.0
2025Q4
Confidence Score History
2019Q2 2025Q4
Shares held
31,739
Last filed at
Feb 15, 2024
Confidence Score
50.0
2025Q4
Confidence Score History
2020Q4 2025Q4
Shares held
1,000
Last filed at
Dec 7, 2015
Confidence Score
50.0
2025Q4
Confidence Score History
2013Q3 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 25, 2024 Aug 14, 2024 Q32 Bio Inc. Director Sell 47.5 -265 -3.21% $6.4K
Jan 1, 2024 Feb 15, 2024 Q32 Bio Inc. Director Sell 33.8 -13,037 -9.19% $7.4K
Jan 9, 2023 Jan 11, 2023 Q32 Bio Inc. Director Sell 32.5 -10,616 -8.92% $14.8K
Jan 1, 2022 Jan 12, 2022 Q32 Bio Inc. CEO Sell 36.3 -5,354 -5.86% $20.2K
Feb 19, 2021 Feb 23, 2021 Stoke Therapeutics, Inc. Director Sell 7.5 -10,000 -100.00% $606.7K
Nov 23, 2020 Nov 25, 2020 Stoke Therapeutics, Inc. Director Sell 7.5 -20,000 -100.00% $920.6K
Feb 3, 2020 Feb 5, 2020 Q32 Bio Inc. CEO Sell 25.0 -12,500 -13.89% $202K
Jan 2, 2020 Jan 3, 2020 Q32 Bio Inc. CEO Sell 22.5 -12,500 -12.19% $256.2K
Nov 29, 2019 Dec 3, 2019 Q32 Bio Inc. CEO Sell 17.5 -25,000 -19.61% $403.7K
Oct 1, 2019 Oct 2, 2019 Q32 Bio Inc. CEO Sell 28.8 -12,500 -8.93% $217.5K
Sep 3, 2019 Sep 5, 2019 Q32 Bio Inc. CEO Sell 28.8 -12,500 -8.20% $234.3K
Aug 1, 2019 Aug 5, 2019 Q32 Bio Inc. CEO Sell 28.8 -12,500 -7.58% $217.1K
Jul 1, 2019 Jul 3, 2019 Q32 Bio Inc. CEO Sell 32.5 -12,500 -7.04% $237.3K
Jun 3, 2019 Jun 5, 2019 Q32 Bio Inc. CEO Sell 32.5 -12,500 -6.58% $248.3K
Apr 9, 2015 Apr 9, 2015 Tempest Therapeutics, Inc. President Buy 90.0 +225 19.15% $6.5K
Apr 8, 2015 Apr 8, 2015 Tempest Therapeutics, Inc. President Buy 90.0 +175 17.50% $4.9K
Sep 12, 2013 Sep 12, 2013 Tempest Therapeutics, Inc. Chief Scientific Officer Buy 91.3 +1,000 100.00% $10.3K