4D Molecular Therapeutics, Inc. (FDMT)

Latest Insider Confidence Score

2026Q1

48.9
Bearish

Company insider confidence (by quarter)

2020Q4 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Viking Global Investors Lp 10% Owner 4,247,914 Jan 5, 2024
Viking Global Opportunities Parent GP LLC 10% Owner 4,247,914 Jan 5, 2024
Viking Global Opportunities GP LLC 10% Owner 4,247,914 Jan 5, 2024
Viking Global Opportunities Portfolio GP LLC 10% Owner 4,247,914 Jan 5, 2024
Viking Global Opportunities Illiquid Investments Sub-Master LP 10% Owner 4,247,914 Jan 5, 2024

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Jan 5, 2026 Jan 7, 2026 SBLENDORIO GLENN Director Neutral 52.5 - 0.00% ✗ -
Jan 7, 2026 SBLENDORIO GLENN Director Neutral 52.5 - 0.00% ✗ -
Dec 20, 2025 Dec 23, 2025 Gupta Ashoo VP, Finance and Controller Sell 52.5 -389 -0.42% ✗ $3.4K
Dec 19, 2025 Simms Christopher Paul Officer Neutral 52.5 - 0.00% ✗ -
Dec 16, 2025 Dec 19, 2025 Bizily Scott Chief Legal Officer Sell 13.8 -1,635 -31.27% ✓ $17.8K
Dec 12, 2025 Dec 16, 2025 THEUER CHARLES Director Neutral 52.5 - 0.00% ✗ -
Dec 9, 2025 Dec 11, 2025 Humer Kristian CFO Neutral 52.5 - 0.00% ✗ -
Dec 11, 2025 Humer Kristian CFO Neutral 52.5 - 0.00% ✗ -
Nov 17, 2025 Nov 19, 2025 Bizily Scott Chief Legal Officer Sell 13.8 -1,635 -31.27% ✓ $17.3K
Oct 24, 2025 Oct 27, 2025 Bizily Scott Chief Legal Officer Sell 13.8 -2,678 -42.70% ✓ $32.1K
Oct 16, 2025 Oct 20, 2025 Bizily Scott Chief Legal Officer Sell 18.8 -1,635 -23.96% ✓ $16.6K
Oct 9, 2025 Oct 14, 2025 Bizily Scott Chief Legal Officer Sell 13.8 -2,408 -31.70% ✓ $24.1K
Oct 10, 2025 Gupta Ashoo VP, Finance and Controller Neutral 52.5 - 0.00% ✗ -
Sep 23, 2025 Sep 26, 2025 Bizily Scott Chief Legal Officer Sell 18.8 -2,407 -24.06% ✓ $19.3K
Jun 17, 2025 Jun 20, 2025 Chacko Jacob Director Neutral 52.5 - 0.00% ✗ -
Jun 17, 2025 Jun 20, 2025 GRAY SUSANNAH Director Neutral 52.5 - 0.00% ✗ -
Jun 17, 2025 Jun 20, 2025 Tomasello Shawn Director Neutral 52.5 - 0.00% ✗ -
Jun 17, 2025 Jun 20, 2025 THEUER CHARLES Director Neutral 52.5 - 0.00% ✗ -
Jun 17, 2025 Jun 20, 2025 Miller-Rich Nancy Director Neutral 52.5 - 0.00% ✗ -
Jun 17, 2025 Jun 20, 2025 MILLIGAN JOHN F Director Neutral 52.5 - 0.00% ✗ -
Mar 6, 2025 Mar 10, 2025 Bizily Scott Chief Legal Officer Neutral 52.5 - 0.00% ✗ -
Mar 6, 2025 Mar 10, 2025 Kirn David CEO Neutral 52.5 - 0.00% ✗ -
Mar 6, 2025 Mar 10, 2025 Kim Robert Young Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Mar 6, 2025 Mar 10, 2025 Mehra Uneek Officer Neutral 52.5 - 0.00% ✗ -
Mar 6, 2025 Mar 10, 2025 Kamal Fariborz COO Neutral 52.5 - 0.00% ✗ -
Dec 9, 2024 Dec 10, 2024 RA CAPITAL MANAGEMENT, L.P. 10% Owner Neutral 27.5 -535,000 -10.49% ✗ -
Nov 25, 2024 RA CAPITAL MANAGEMENT, L.P. 10% Owner Neutral 52.5 - 0.00% ✗ -
Nov 8, 2024 Nov 13, 2024 BVF PARTNERS L P/IL Other Neutral 27.5 -5,680,000 -78.22% ✗ -
Sep 16, 2024 Sep 18, 2024 Bizily Scott Chief Legal Officer Sell 37.5 -500 -6.87% ✓ $8.2K
Aug 19, 2024 Aug 21, 2024 Bizily Scott Chief Legal Officer Sell 37.5 -500 -6.87% ✓ $7.5K
Aug 1, 2024 BVF PARTNERS L P/IL 10% Owner Neutral 52.5 - 0.00% ✗ -
Jul 16, 2024 Jul 18, 2024 Bizily Scott Chief Legal Officer Sell 18.8 -1,750 -20.51% ✓ $47.4K
Jul 11, 2024 Jul 15, 2024 Bizily Scott Chief Legal Officer Sell 18.8 -1,996 -22.74% ✓ $49.9K
Jul 10, 2024 Jul 12, 2024 Kirn David CEO Sell 42.5 -12,923 -1.21% ✓ $290.6K
Jul 1, 2024 Jul 3, 2024 Bizily Scott Chief Legal Officer Sell 10.0 -4,248 -70.98% ✓ $90.8K
Jun 24, 2024 Jun 26, 2024 Kirn David CEO Sell 42.5 -12,930 -1.21% ✓ $298.7K
Jun 17, 2024 Jun 20, 2024 Bizily Scott Chief Legal Officer Sell 13.8 -1,750 -50.19% ✓ $41.5K
May 21, 2024 May 23, 2024 Tomasello Shawn Director Neutral 52.5 - 0.00% ✗ -
May 21, 2024 May 23, 2024 Chacko Jacob Director Neutral 52.5 - 0.00% ✗ -
May 21, 2024 May 23, 2024 THEUER CHARLES Director Neutral 52.5 - 0.00% ✗ -
May 21, 2024 May 23, 2024 Miller-Rich Nancy Director Neutral 52.5 - 0.00% ✗ -
May 21, 2024 May 23, 2024 MILLIGAN JOHN F Director Neutral 52.5 - 0.00% ✗ -
May 21, 2024 May 23, 2024 GRAY SUSANNAH Director Neutral 52.5 - 0.00% ✗ -
May 16, 2024 May 20, 2024 Bizily Scott Chief Legal Officer Sell 13.8 -1,750 -50.19% ✓ $44.5K
Apr 16, 2024 Apr 18, 2024 Bizily Scott Chief Legal Officer Sell 13.8 -1,750 -50.19% ✓ $45K
Apr 1, 2024 Apr 3, 2024 Bizily Scott Chief Legal Officer Sell 7.5 -8,153 -82.44% ✓ $259.1K
Mar 27, 2024 Mar 29, 2024 Bizily Scott Chief Legal Officer Sell 10.0 -5,833 -77.05% ✓ $204.4K
Mar 18, 2024 Mar 20, 2024 Bizily Scott Chief Legal Officer Sell 10.0 -1,750 -50.19% ✓ $54.7K
Feb 27, 2024 Feb 29, 2024 Bizily Scott Chief Legal Officer Sell 10.0 -1,909 -52.36% ✓ $57.3K
Feb 16, 2024 Feb 21, 2024 Bizily Scott Chief Legal Officer Sell 13.8 -1,750 -50.19% ✓ $48.4K
Feb 8, 2024 Feb 12, 2024 Bizily Scott Chief Legal Officer Sell 10.0 -6,244 -54.51% ✓ $171.7K
Feb 8, 2024 Feb 12, 2024 Kirn David CEO Sell 23.8 -92,001 -7.99% ✓ $2.5M
Feb 5, 2024 Feb 7, 2024 Kim Robert Young Chief Medical Officer Sell 7.5 -24,552 -80.82% ✓ $737.8K
Feb 7, 2024 Kim Robert Young Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Jan 23, 2024 Jan 25, 2024 Kirn David CEO Sell 48.8 -5,696 -0.49% ✓ $104.9K
Dec 15, 2023 Jan 8, 2024 Kirn David CEO Sell 23.8 -102,303 -8.12% ✓ $2M
Jan 4, 2024 Jan 5, 2024 VIKING GLOBAL INVESTORS LP 10% Owner Sell 15.0 -540,000 -11.28% ✗ $10.5M
Dec 11, 2023 Dec 13, 2023 Mehra Uneek Officer Neutral 52.5 - 0.00% ✗ -
Dec 11, 2023 Dec 13, 2023 Bizily Scott Chief Legal and HR Officer Neutral 52.5 - 0.00% ✗ -
Dec 11, 2023 Dec 13, 2023 Kirn David CEO Neutral 52.5 - 0.00% ✗ -
Dec 11, 2023 Dec 13, 2023 Kim Robert Young Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Dec 11, 2023 Dec 13, 2023 Kamal Fariborz COO Neutral 52.5 - 0.00% ✗ -
Oct 1, 2023 Oct 3, 2023 Mehra Uneek Officer Neutral 52.5 - 0.00% ✗ -
Sep 26, 2023 Mehra Uneek Officer Neutral 52.5 - 0.00% ✗ -
Jun 8, 2023 Jun 12, 2023 Bizily Scott Chief Legal and HR Officer Sell 10.0 -3,750 -68.34% ✓ $78.2K
Jun 1, 2023 Jun 6, 2023 Bizily Scott Chief Legal and HR Officer Sell 13.8 -2,247 -56.40% ✓ $41.1K
May 23, 2023 May 25, 2023 MILLIGAN JOHN F Director Neutral 52.5 - 0.00% ✗ -
May 23, 2023 May 25, 2023 Tomasello Shawn Director Neutral 52.5 - 0.00% ✗ -
May 23, 2023 May 25, 2023 Miller-Rich Nancy Director Neutral 52.5 - 0.00% ✗ -
May 23, 2023 May 25, 2023 THEUER CHARLES Director Neutral 52.5 - 0.00% ✗ -
May 23, 2023 May 25, 2023 GRAY SUSANNAH Director Neutral 52.5 - 0.00% ✗ -
May 23, 2023 May 25, 2023 Chacko Jacob Director Neutral 52.5 - 0.00% ✗ -
May 23, 2023 May 25, 2023 Kasahara Noriyuki Director Neutral 52.5 - 0.00% ✗ -
May 15, 2023 May 16, 2023 Moretti August J CFO Neutral 52.5 - 0.00% ✗ -
May 9, 2023 May 11, 2023 VIKING GLOBAL INVESTORS LP 10% Owner Buy 100.0 +850,000 21.59% ✗ $13.6M
May 2, 2023 May 4, 2023 Kirn David CEO Neutral 52.5 - 0.00% ✗ -
Apr 21, 2023 Apr 25, 2023 Bizily Scott Chief Legal and HR Officer Sell 10.0 -3,750 -64.00% ✓ $75K
Apr 21, 2023 Apr 25, 2023 Chacko Jacob Director Sell 10.0 -5,000 -100.00% ✓ $100.3K
Apr 5, 2023 Kim Robert Young Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Mar 1, 2023 Mar 3, 2023 Bizily Scott Chief Legal and HR Officer Sell 13.8 -2,248 -51.60% ✓ $43.4K
Feb 21, 2023 Feb 23, 2023 Kirn David CEO Sell 42.5 -34,446 -1.82% ✓ $709.9K
Feb 10, 2023 Feb 14, 2023 Moretti August J CFO Neutral 52.5 - 0.00% ✗ -
Feb 10, 2023 Feb 14, 2023 Kirn David CEO Neutral 52.5 - 0.00% ✗ -
Feb 10, 2023 Feb 14, 2023 Kamal Fariborz COO Neutral 52.5 - 0.00% ✗ -
Feb 10, 2023 Feb 14, 2023 Bizily Scott Chief Legal and HR Officer Neutral 52.5 - 0.00% ✗ -
Jan 19, 2023 Jan 23, 2023 Kirn David CEO Sell 42.5 -19,524 -1.02% ✓ $392.5K
Dec 21, 2022 Dec 22, 2022 Moretti August J CFO Neutral 52.5 - 0.00% ✗ -
Dec 15, 2022 Dec 19, 2022 Kirn David CEO Sell 32.5 -86,877 -4.34% ✓ $2M
Dec 1, 2022 Dec 5, 2022 Bizily Scott Chief Legal and HR Officer Sell 20.0 -6,000 -16.41% ✓ $136.7K
Sep 23, 2022 Sep 27, 2022 Kasahara Noriyuki Director Neutral 52.5 - 0.00% ✗ -
Sep 23, 2022 Sep 27, 2022 Kamal Fariborz COO Neutral 52.5 - 0.00% ✗ -
Sep 27, 2022 Kasahara Noriyuki Director Neutral 52.5 - 0.00% ✗ -
Sep 1, 2022 Sep 6, 2022 FISHMAN ROBERT S Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Sep 1, 2022 Sep 6, 2022 Moretti August J CFO Neutral 52.5 - 0.00% ✗ -
Sep 1, 2022 Sep 6, 2022 Kamal Fariborz Officer Neutral 52.5 - 0.00% ✗ -
Sep 1, 2022 Sep 6, 2022 Bizily Scott Chief Legal and HR Officer Neutral 52.5 - 0.00% ✗ -
Jun 27, 2022 BVF PARTNERS L P/IL 10% Owner Neutral 52.5 - 0.00% ✗ -
Jun 18, 2022 Jun 21, 2022 Bizily Scott Chief Legal and HR Officer Neutral 52.5 - 0.00% ✗ -
May 23, 2022 May 25, 2022 Tomasello Shawn Director Neutral 52.5 - 0.00% ✗ -
May 23, 2022 May 25, 2022 THEUER CHARLES Director Neutral 52.5 - 0.00% ✗ -