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4D Molecular Therapeutics, Inc.

FDMT
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001650648

In the last 90 days, 4D Molecular Therapeutics, Inc. insiders filed 0 open-market purchases and 9 sales; 157 institutions reported holding it in 13F filings for Q2 2026, worth $771.2M in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by 4D Molecular Therapeutics, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
9 filings
2 insiders, $3.20M in total
Insiders trading
2
Net value
−$3.20M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for 4D Molecular Therapeutics, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for 4D Molecular Therapeutics, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Bizily ScottChief Legal Officer8,617Sep 22, 202611
Kirn DavidSee Remarks767,486Sep 16, 20268
Milligan John FDirector–Jun 18, 20261
Sblendorio GlennDirector–Jun 18, 20262
Chacko JacobDirector0Jun 18, 20261
Tomasello ShawnDirector–Jun 18, 20261
Theuer CharlesDirector41,684Jun 18, 20262
Miller-Rich NancyDirector–Jun 18, 20261
Gray SusannahDirector–Jun 18, 20261
Simms Christopher PaulSee Remarks–Mar 27, 20261
Gupta AshooVP, Finance and Controller47,055Mar 24, 20262
Humer KristianChief Financial Officer–Dec 11, 20251
Kamal FariborzPresident & COO–Mar 10, 20250
Mehra UneekSee Remarks–Mar 10, 20250
Kim Robert YoungChief Medical Officer1,043Mar 10, 20250
RA Capital Healthcare Fund LP10% Owner4,563,211IndirectDec 10, 20240
Ra Capital Management, L.P.10% Owner4,563,211IndirectDec 10, 20240
Kolchinsky Peter10% Owner4,563,211IndirectDec 10, 20240
Shah Rajeev M.10% Owner4,563,211IndirectDec 10, 20240
Biotechnology Value Fund L POther: See Explanation of Responses87,911Nov 13, 20240
BVF Partners L POther: See Explanation of Responses87,911Nov 13, 20240
BVF IncOther: See Explanation of Responses87,911Nov 13, 20240
Biotechnology Value Fund II LPOther: See Explanation of Responses87,911Nov 13, 20240
Lampert Mark NOther: See Explanation of Responses87,911Nov 13, 20240
Biotechnology Value Trading Fund OS LPOther: See Explanation of Responses87,911Nov 13, 20240
BVF Partners OS Ltd.Other: See Explanation of Responses87,911Nov 13, 20240
BVF I GP LLCOther: See Explanation of Responses87,911Nov 13, 20240
BVF II GP LLCOther: See Explanation of Responses87,911Nov 13, 20240
BVF GP Holdings LLCOther: See Explanation of Responses87,911Nov 13, 20240
Viking Global Investors LP10% Owner4,247,914IndirectJan 5, 20240
Halvorsen Ole Andreas10% Owner4,247,914IndirectJan 5, 20240
Ott David C.10% Owner4,247,914IndirectJan 5, 20240
Viking Global Opportunities Portfolio GP LLC10% Owner4,247,914IndirectJan 5, 20240
Viking Global Opportunities GP LLC10% Owner4,247,914IndirectJan 5, 20240
Viking Global Opportunities Illiquid Investments Sub-Master LP10% Owner4,247,914IndirectJan 5, 20240
Shabet Rose Sharon10% Owner4,247,914IndirectJan 5, 20240
Viking Global Opportunities Parent GP LLC10% Owner4,247,914IndirectJan 5, 20240
Kasahara NoriyukiDirector–May 25, 20230
Moretti August JChief Financial Officer11,045May 16, 20230
Fishman Robert SChief Medical Officer–Sep 6, 20220
Zimmermann CarolyneChief Business Officer–Feb 3, 20220
Schaffer DavidDirector901,215Oct 22, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 22, 2026 (view filing)6:43 PM ETSep 166 daysLateBizily ScottChief Legal OfficerSSale−1.64K$13.65−$22.3K−15.9%8.62K after10b5-1
Sep 16, 2026 (view filing)5:13 PM ETSep 142 daysKirn DavidSee RemarksSSale−58.3K$13.90−$811.0K−7.1%767.5K after10b5-1
Sep 3, 2026 (view filing)6:55 PM ETSep 12 daysBizily ScottChief Legal OfficerSSale−584$14.00−$8.18K−6.3%8.62K after10b5-1
Aug 21, 2026 (view filing)4:06 PM ETAug 192 daysKirn DavidSee RemarksSSale−69.1K$15.75−$1.09M−7.7%825.8K after2 lots10b5-1
Aug 17, 2026 (view filing)5:34 PM ETAug 13-174 daysBizily ScottChief Legal OfficerSSale−3.27K$12.10−$39.6K−27.5%8.62K after2 lots10b5-1
Aug 5, 2026 (view filing)4:10 PM ETAug 41 dayKirn DavidSee RemarksSSale−26.8K$10.23−$274.6K−3.1%844.9K after10b5-1
Aug 4, 2026 (view filing)4:45 PM ETAug 31 dayKirn DavidSee RemarksSSale−12.4K$10.05−$124.7K−1.4%871.7K after10b5-1
Jul 14, 2026 (view filing)5:04 PM ETJul 9-105 daysLateKirn DavidSee RemarksSSale−58.3K$12.64−$737.4K−6.2%884.2K after3 lots10b5-1
Jul 2, 2026 (view filing)4:07 PM ETJun 302 daysBizily ScottChief Legal OfficerSSale−6.57K$14.00−$91.9K−43.2%8.62K after10b5-1
Jun 25, 2026 (view filing)Jun 232 daysBizily ScottChief Legal OfficerSSale−9.81K$12.00−$117.7K−53.2%8.62K after10b5-1
Jun 23, 2026 (view filing)Jun 221 dayKirn DavidSee RemarksSSale−114.7K$10.47−$1.20M−10.9%942.5K after10b5-1
Jun 2, 2026 (view filing)Jun 11 dayKirn DavidSee RemarksSSale−1.92K$10.02−$19.3K−0.2%1.06M after10b5-1
Mar 24, 2026 (view filing)Mar 204 daysGupta AshooVP, Finance and ControllerSSale−390$8.61−$3.36K−0.8%47.1K after2 lots
Dec 23, 2025 (view filing)Dec 203 daysGupta AshooVP, Finance and ControllerSSale−389$8.68−$3.38K−0.8%46.4K after2 lots
Dec 19, 2025 (view filing)Dec 163 daysLateBizily ScottChief Legal OfficerSSale−1.64K$10.90−$17.8K−31.3%3.59K after10b5-1
Nov 19, 2025 (view filing)Nov 172 daysBizily ScottChief Legal OfficerSSale−1.64K$10.59−$17.3K−31.3%3.59K after10b5-1
Oct 27, 2025 (view filing)Oct 243 daysBizily ScottChief Legal OfficerSSale−2.68K$12.00−$32.1K−42.7%3.59K after10b5-1
Oct 20, 2025 (view filing)Oct 164 daysBizily ScottChief Legal OfficerSSale−1.64K$10.17−$16.6K−24.0%5.19K after10b5-1
Oct 14, 2025 (view filing)Oct 95 daysBizily ScottChief Legal OfficerSSale−2.41K$10.00−$24.1K−31.7%5.19K after10b5-1
Sep 26, 2025 (view filing)Sep 233 daysLateBizily ScottChief Legal OfficerSSale−2.41K$8.00−$19.3K−24.1%7.60K after10b5-1
Sep 18, 2024 (view filing)Sep 162 daysBizily ScottChief Legal OfficerSSale−500$16.33−$8.16K−6.9%6.78K after10b5-1
Aug 21, 2024 (view filing)Aug 192 daysBizily ScottChief Legal OfficerSSale−500$15.00−$7.50K−6.9%6.78K after10b5-1
Jul 18, 2024 (view filing)Jul 162 daysBizily ScottChief Legal OfficerSSale−1.75K$27.11−$47.4K−20.5%6.78K after10b5-1
Jul 15, 2024 (view filing)Jul 114 daysBizily ScottChief Legal OfficerSSale−2.00K$25.00−$49.9K−22.7%6.78K after10b5-1
Jul 12, 2024 (view filing)Jul 102 daysKirn DavidChief Executive OfficerSSale−12.9K$22.49−$290.6K−1.2%1.06M after10b5-1
Jul 3, 2024 (view filing)Jul 12 daysBizily ScottChief Legal OfficerSSale−4.25K$21.36−$90.7K−71.0%1.74K after10b5-1
Jun 26, 2024 (view filing)Jun 242 daysKirn DavidChief Executive OfficerSSale−12.9K$23.10−$298.7K−1.2%1.06M after10b5-1
Jun 20, 2024 (view filing)Jun 173 daysBizily ScottChief Legal OfficerSSale−1.75K$23.71−$41.5K−50.2%1.74K after10b5-1
May 20, 2024 (view filing)May 164 daysBizily ScottChief Legal OfficerSSale−1.75K$25.45−$44.5K−50.2%1.74K after2 lots10b5-1
Apr 18, 2024 (view filing)Apr 162 daysBizily ScottChief Legal OfficerSSale−1.75K$25.74−$45.0K−50.2%1.74K after10b5-1
Apr 3, 2024 (view filing)Apr 12 daysBizily ScottChief Legal OfficerSSale−8.15K$31.78−$259.1K−82.4%1.74K after10b5-1
Mar 29, 2024 (view filing)Mar 272 daysBizily ScottChief Legal OfficerSSale−5.83K$35.04−$204.4K−77.1%1.74K after10b5-1
Mar 20, 2024 (view filing)Mar 182 daysBizily ScottChief Legal OfficerSSale−1.75K$31.27−$54.7K−50.2%1.74K after10b5-1
Feb 29, 2024 (view filing)Feb 272 daysBizily ScottChief Legal OfficerSSale−1.91K$30.00−$57.3K−52.4%1.74K after10b5-1
Feb 21, 2024 (view filing)Feb 165 daysBizily ScottChief Legal OfficerSSale−1.75K$27.67−$48.4K−50.2%1.74K after10b5-1
Feb 12, 2024 (view filing)Feb 84 daysBizily ScottChief Legal OfficerSSale−6.24K$27.50−$171.7K−78.2%1.74K after3 lots10b5-1
Feb 12, 2024 (view filing)Feb 84 daysKirn DavidChief Executive OfficerSSale−92.0K$27.13−$2.50M−8.0%1.06M after10b5-1
Feb 7, 2024 (view filing)Feb 52 daysKim Robert YoungChief Medical OfficerSSale−24.6K$30.05−$737.8K−95.9%1.04K after4 lots10b5-1
Jan 25, 2024 (view filing)Jan 232 daysKirn DavidChief Executive OfficerSSale−5.70K$18.41−$104.9K−0.5%1.15M after
Jan 8, 2024 (view filing)Dec 15, 2023-Jan 5, 202424 daysLateKirn DavidChief Executive OfficerSSale−102.3K$19.15−$1.96M−8.1%1.16M after5 lots10b5-1
Jan 5, 2024 (view filing)5:44 PM ETJan 41 dayViking Global Investors LP and 7 others10% OwnerSSale−540.0K$19.53−$10.5M−11.3%4.25M after
Jun 12, 2023 (view filing)Jun 84 daysBizily ScottChief Legal and HR OfficerSSale−3.75K$20.85−$78.2K−68.3%1.74K after
Jun 6, 2023 (view filing)Jun 15 daysLateBizily ScottChief Legal and HR OfficerSSale−2.25K$18.31−$41.1K−56.4%1.74K after
May 11, 2023 (view filing)5:50 PM ETMay 92 daysViking Global Investors LP and 7 others10% OwnerPPurchase+850.0K$16.00+$13.6M+21.6%4.79M after
Apr 25, 2023 (view filing)Apr 214 daysBizily ScottChief Legal and HR OfficerSSale−3.75K$20.00−$75.0K−64.0%2.11K after10b5-1
Apr 25, 2023 (view filing)Apr 214 daysChacko JacobDirectorSSale−5.00K$20.05−$100.3K−100.0%0 after10b5-1
Mar 3, 2023 (view filing)Mar 12 daysBizily ScottChief Legal and HR OfficerSSale−2.25K$19.30−$43.4K−51.6%2.11K after
Feb 23, 2023 (view filing)Feb 21-222 daysKirn DavidChief Executive OfficerSSale−34.4K$20.61−$709.8K−1.8%1.86M after3 lots
Jan 23, 2023 (view filing)Jan 19-204 daysKirn DavidChief Executive OfficerSSale−19.5K$20.10−$392.4K−1.0%1.89M after2 lots
Dec 19, 2022 (view filing)Dec 15-164 daysKirn DavidChief Executive OfficerSSale−86.9K$23.23−$2.02M−4.3%1.91M after4 lots