FDMT

4D Molecular Therapeutics, Inc.

Insider trading activity for 4D Molecular Therapeutics, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

-$3.2M

net selling

Bought(0 · 0 insiders): $0
Sold(13 · 2 insiders): $3.2M

Past 6 months

-$4.5M

net selling

Bought(0 · 0 insiders): $0
Sold(16 · 2 insiders): $4.5M

Past 12 months

-$4.7M

net selling

Bought(0 · 0 insiders): $0
Sold(25 · 3 insiders): $4.7M

Transaction history

The 78 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 16	Bizily Scott	Chief Legal Officer	MEXER◷◆	1,635	—	—	—	Open the original filing on SEC.gov
Sep 16	Bizily Scott	Chief Legal Officer	SSELL◷	1,635	$13.65	$22.3K	-16.0%	Open the original filing on SEC.gov
Sep 16	Bizily Scott	Chief Legal Officer	MEXER◷	1,635	$4.14	$6.8K	+19.0%	Open the original filing on SEC.gov
Sep 14	Kirn David	See Remarks	SSELL◷	58,333	$13.90	$811K	-7.1%	Open the original filing on SEC.gov
Sep 1	Bizily Scott	Chief Legal Officer	MEXER◷◆	584	—	—	—	Open the original filing on SEC.gov
Sep 1	Bizily Scott	Chief Legal Officer	SSELL◷	584	$14.00	$8.2K	-6.3%	Open the original filing on SEC.gov
Sep 1	Bizily Scott	Chief Legal Officer	MEXER◷	584	$6.49	$3.8K	+6.8%	Open the original filing on SEC.gov
Aug 19	Kirn David	See Remarks	MEXER◷◆	50,000	—	—	—	Open the original filing on SEC.gov
Aug 19	Kirn David	See Remarks	SSELL◷	25,927	$16.42	$425.7K	-3.0%	Open the original filing on SEC.gov
Aug 19	Kirn David	See Remarks	SSELL◷	43,149	$15.36	$662.6K	-4.8%	Open the original filing on SEC.gov
Aug 19	Kirn David	See Remarks	MEXER◷	50,000	$4.14	$207K	+5.9%	Open the original filing on SEC.gov
Aug 17	Bizily Scott	Chief Legal Officer	MEXER◷◆	1,635	—	—	—	Open the original filing on SEC.gov
Aug 17	Bizily Scott	Chief Legal Officer	SSELL◷	1,635	$12.20	$19.9K	-16.0%	Open the original filing on SEC.gov
Aug 17	Bizily Scott	Chief Legal Officer	MEXER◷	1,635	$4.14	$6.8K	+19.0%	Open the original filing on SEC.gov
Aug 13	Bizily Scott	Chief Legal Officer	MEXER◷◆	1,635	—	—	—	Open the original filing on SEC.gov
Aug 13	Bizily Scott	Chief Legal Officer	SSELL◷	1,635	$12.00	$19.6K	-16.0%	Open the original filing on SEC.gov
Aug 13	Bizily Scott	Chief Legal Officer	MEXER◷	1,635	$4.14	$6.8K	+19.0%	Open the original filing on SEC.gov
Aug 4	Kirn David	See Remarks	SSELL◷	26,842	$10.23	$274.6K	-3.1%	Open the original filing on SEC.gov
Aug 3	Kirn David	See Remarks	SSELL◷	12,415	$10.05	$124.7K	-1.4%	Open the original filing on SEC.gov
Jul 10	Kirn David	See Remarks	SSELL◷	442	$12.84	$5.7K	<0.1%	Open the original filing on SEC.gov
Jul 10	Kirn David	See Remarks	SSELL◷	15,283	$12.01	$183.6K	-1.7%	Open the original filing on SEC.gov
Jul 9	Kirn David	See Remarks	SSELL◷	42,608	$12.87	$548.2K	-4.5%	Open the original filing on SEC.gov
Jun 30	Bizily Scott	Chief Legal Officer	MEXER◷◆	5,752	—	—	—	Open the original filing on SEC.gov
Jun 30	Bizily Scott	Chief Legal Officer	MEXER◷◆	814	—	—	—	Open the original filing on SEC.gov
Jun 30	Bizily Scott	Chief Legal Officer	SSELL◷	6,566	$14.00	$91.9K	-43.3%	Open the original filing on SEC.gov
Jun 30	Bizily Scott	Chief Legal Officer	MEXER◷	5,752	$6.49	$37.3K	+61.0%	Open the original filing on SEC.gov
Jun 30	Bizily Scott	Chief Legal Officer	MEXER◷	814	$4.14	$3.4K	+9.4%	Open the original filing on SEC.gov
Jun 23	Bizily Scott	Chief Legal Officer	MEXER◷◆	9,810	—	—	—	Open the original filing on SEC.gov
Jun 23	Bizily Scott	Chief Legal Officer	SSELL◷	9,810	$12.00	$117.7K	-53.2%	Open the original filing on SEC.gov
Jun 23	Bizily Scott	Chief Legal Officer	MEXER◷	9,810	$4.14	$40.6K	+113.8%	Open the original filing on SEC.gov
Jun 22	Kirn David	See Remarks	SSELL◷	114,746	$10.47	$1.2M	-10.8%	Open the original filing on SEC.gov
Jun 17	Tomasello Shawn	Director	AGRANT◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Theuer Charles	Director	AGRANT◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Miller-Rich Nancy	Director	AGRANT◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Gray Susannah	Director	AGRANT◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Milligan John F	Director	AGRANT◆	75,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Sblendorio Glenn	Director	AGRANT◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 17	Chacko Jacob	Director	AGRANT◆	50,000	—	—	—	Open the original filing on SEC.gov
Jun 1	Kirn David	See Remarks	SSELL◷	1,922	$10.02	$19.3K	-0.2%	Open the original filing on SEC.gov
Mar 25	Kirn David	Chief Executive Officer	AGRANT◆	750,000	—	—	—	Open the original filing on SEC.gov
Mar 25	Bizily Scott	Chief Legal Officer	AGRANT◆	217,000	—	—	—	Open the original filing on SEC.gov
Mar 25	Simms Christopher Paul	See Remarks	AGRANT◆	219,000	—	—	—	Open the original filing on SEC.gov
Mar 20	Gupta Ashoo	VP, Finance and…	MEXER◆	221	—	—	—	Open the original filing on SEC.gov
Mar 20	Gupta Ashoo	VP, Finance and…	MEXER◆	865	—	—	—	Open the original filing on SEC.gov
Mar 20	Gupta Ashoo	VP, Finance and…	SSELL	80	$8.61	$689	-0.2%	Open the original filing on SEC.gov
Mar 20	Gupta Ashoo	VP, Finance and…	MEXER	221	—	—	+0.5%	Open the original filing on SEC.gov
Mar 20	Gupta Ashoo	VP, Finance and…	SSELL	310	$8.61	$2.7K	-0.7%	Open the original filing on SEC.gov
Mar 20	Gupta Ashoo	VP, Finance and…	MEXER	865	—	—	+1.9%	Open the original filing on SEC.gov
Jan 5	Sblendorio Glenn	Director	AGRANT◆	45,000	—	—	—	Open the original filing on SEC.gov
Dec 20, 2025	Gupta Ashoo	VP, Finance and…	MEXER◆	220	—	—	—	Open the original filing on SEC.gov
Dec 20, 2025	Gupta Ashoo	VP, Finance and…	MEXER◆	866	—	—	—	Open the original filing on SEC.gov
Dec 20, 2025	Gupta Ashoo	VP, Finance and…	SSELL	79	$8.68	$686	-0.2%	Open the original filing on SEC.gov
Dec 20, 2025	Gupta Ashoo	VP, Finance and…	MEXER	220	—	—	+0.5%	Open the original filing on SEC.gov
Dec 20, 2025	Gupta Ashoo	VP, Finance and…	SSELL	310	$8.68	$2.7K	-0.7%	Open the original filing on SEC.gov
Dec 20, 2025	Gupta Ashoo	VP, Finance and…	MEXER	866	—	—	+1.9%	Open the original filing on SEC.gov
Dec 16, 2025	Bizily Scott	Chief Legal Officer	MEXER◷◆	1,635	—	—	—	Open the original filing on SEC.gov
Dec 16, 2025	Bizily Scott	Chief Legal Officer	SSELL◷	1,635	$10.90	$17.8K	-31.3%	Open the original filing on SEC.gov
Dec 16, 2025	Bizily Scott	Chief Legal Officer	MEXER◷	1,635	$4.14	$6.8K	+45.5%	Open the original filing on SEC.gov
Dec 12, 2025	Theuer Charles	Director	MEXER◆	9,333	—	—	—	Open the original filing on SEC.gov
Dec 12, 2025	Theuer Charles	Director	MEXER	9,333	$1.14	$10.6K	+28.8%	Open the original filing on SEC.gov
Dec 9, 2025	Humer Kristian	Chief Financial Officer	AGRANT◆	480,000	—	—	—	Open the original filing on SEC.gov
Nov 17, 2025	Bizily Scott	Chief Legal Officer	MEXER◷◆	1,635	—	—	—	Open the original filing on SEC.gov
Nov 17, 2025	Bizily Scott	Chief Legal Officer	SSELL◷	1,635	$10.59	$17.3K	-31.3%	Open the original filing on SEC.gov
Nov 17, 2025	Bizily Scott	Chief Legal Officer	MEXER◷	1,635	$4.14	$6.8K	+45.5%	Open the original filing on SEC.gov
Oct 24, 2025	Bizily Scott	Chief Legal Officer	MEXER◷◆	1,084	—	—	—	Open the original filing on SEC.gov
Oct 24, 2025	Bizily Scott	Chief Legal Officer	SSELL◷	2,678	$12.00	$32.1K	-42.7%	Open the original filing on SEC.gov
Oct 24, 2025	Bizily Scott	Chief Legal Officer	MEXER◷	1,084	$6.49	$7K	+20.9%	Open the original filing on SEC.gov
Oct 16, 2025	Bizily Scott	Chief Legal Officer	MEXER◷◆	1,635	—	—	—	Open the original filing on SEC.gov
Oct 16, 2025	Bizily Scott	Chief Legal Officer	SSELL◷	1,635	$10.17	$16.6K	-24.0%	Open the original filing on SEC.gov
Oct 16, 2025	Bizily Scott	Chief Legal Officer	MEXER◷	1,635	$4.14	$6.8K	+31.5%	Open the original filing on SEC.gov
Oct 9, 2025	Bizily Scott	Chief Legal Officer	SSELL◷	2,408	$10.00	$24.1K	-31.7%	Open the original filing on SEC.gov
Sep 23, 2025	Bizily Scott	Chief Legal Officer	SSELL◷	2,407	$8.00	$19.3K	-24.1%	Open the original filing on SEC.gov
Jun 17, 2025	Chacko Jacob	Director	AGRANT◆	22,500	—	—	—	Open the original filing on SEC.gov
Jun 17, 2025	Gray Susannah	Director	AGRANT◆	22,500	—	—	—	Open the original filing on SEC.gov
Jun 17, 2025	Tomasello Shawn	Director	AGRANT◆	22,500	—	—	—	Open the original filing on SEC.gov
Jun 17, 2025	Theuer Charles	Director	AGRANT◆	22,500	—	—	—	Open the original filing on SEC.gov
Jun 17, 2025	Miller-Rich Nancy	Director	AGRANT◆	22,500	—	—	—	Open the original filing on SEC.gov
Jun 17, 2025	Milligan John F	Director	AGRANT◆	33,750	—	—	—	Open the original filing on SEC.gov

MEXER◷◆—

Bizily Scott · Chief Legal…Sep 16

1,635 sh

SSELL◷$22.3K

Bizily Scott · Chief Legal…Sep 16

1,635 sh @ $13.65 · -16.0% own

MEXER◷$6.8K

Bizily Scott · Chief Legal…Sep 16

1,635 sh @ $4.14 · +19.0% own

SSELL◷$811K

Kirn David · See RemarksSep 14

58,333 sh @ $13.90 · -7.1% own

MEXER◷◆—

Bizily Scott · Chief Legal…Sep 1

584 sh

SSELL◷$8.2K

Bizily Scott · Chief Legal…Sep 1

584 sh @ $14.00 · -6.3% own

MEXER◷$3.8K

Bizily Scott · Chief Legal…Sep 1

584 sh @ $6.49 · +6.8% own

MEXER◷◆—

Kirn David · See RemarksAug 19

50,000 sh

SSELL◷$425.7K

Kirn David · See RemarksAug 19

25,927 sh @ $16.42 · -3.0% own

SSELL◷$662.6K

Kirn David · See RemarksAug 19

43,149 sh @ $15.36 · -4.8% own

MEXER◷$207K

Kirn David · See RemarksAug 19

50,000 sh @ $4.14 · +5.9% own

MEXER◷◆—

Bizily Scott · Chief Legal…Aug 17

1,635 sh

SSELL◷$19.9K

Bizily Scott · Chief Legal…Aug 17

1,635 sh @ $12.20 · -16.0% own

MEXER◷$6.8K

Bizily Scott · Chief Legal…Aug 17

1,635 sh @ $4.14 · +19.0% own

MEXER◷◆—

Bizily Scott · Chief Legal…Aug 13

1,635 sh

SSELL◷$19.6K

Bizily Scott · Chief Legal…Aug 13

1,635 sh @ $12.00 · -16.0% own

MEXER◷$6.8K

Bizily Scott · Chief Legal…Aug 13

1,635 sh @ $4.14 · +19.0% own

SSELL◷$274.6K

Kirn David · See RemarksAug 4

26,842 sh @ $10.23 · -3.1% own

SSELL◷$124.7K

Kirn David · See RemarksAug 3

12,415 sh @ $10.05 · -1.4% own

SSELL◷$5.7K

Kirn David · See RemarksJul 10

442 sh @ $12.84 · <0.1% own

SSELL◷$183.6K

Kirn David · See RemarksJul 10

15,283 sh @ $12.01 · -1.7% own

SSELL◷$548.2K

Kirn David · See RemarksJul 9

42,608 sh @ $12.87 · -4.5% own

MEXER◷◆—

Bizily Scott · Chief Legal…Jun 30

5,752 sh

MEXER◷◆—

Bizily Scott · Chief Legal…Jun 30

814 sh

SSELL◷$91.9K

Bizily Scott · Chief Legal…Jun 30

6,566 sh @ $14.00 · -43.3% own

MEXER◷$37.3K

Bizily Scott · Chief Legal…Jun 30

5,752 sh @ $6.49 · +61.0% own

MEXER◷$3.4K

Bizily Scott · Chief Legal…Jun 30

814 sh @ $4.14 · +9.4% own

MEXER◷◆—

Bizily Scott · Chief Legal…Jun 23

9,810 sh

SSELL◷$117.7K

Bizily Scott · Chief Legal…Jun 23

9,810 sh @ $12.00 · -53.2% own

MEXER◷$40.6K

Bizily Scott · Chief Legal…Jun 23

9,810 sh @ $4.14 · +113.8% own

SSELL◷$1.2M

Kirn David · See RemarksJun 22

114,746 sh @ $10.47 · -10.8% own

AGRANT◆—

Tomasello Shawn · DirectorJun 17

50,000 sh

AGRANT◆—

Theuer Charles · DirectorJun 17

50,000 sh

AGRANT◆—

Miller-Rich Nancy · DirectorJun 17

50,000 sh

AGRANT◆—

Gray Susannah · DirectorJun 17

50,000 sh

AGRANT◆—

Milligan John F · DirectorJun 17

75,000 sh

AGRANT◆—

Sblendorio Glenn · DirectorJun 17

50,000 sh

AGRANT◆—

Chacko Jacob · DirectorJun 17

50,000 sh

SSELL◷$19.3K

Kirn David · See RemarksJun 1

1,922 sh @ $10.02 · -0.2% own

AGRANT◆—

Kirn David · Chief Executive…Mar 25

750,000 sh

AGRANT◆—

Bizily Scott · Chief Legal…Mar 25

217,000 sh

AGRANT◆—

Simms Christopher Paul · See RemarksMar 25

219,000 sh

MEXER◆—

Gupta Ashoo · VP, Finance and…Mar 20

221 sh

MEXER◆—

Gupta Ashoo · VP, Finance and…Mar 20

865 sh

SSELL$689

Gupta Ashoo · VP, Finance and…Mar 20

80 sh @ $8.61 · -0.2% own

MEXER—

Gupta Ashoo · VP, Finance and…Mar 20

221 sh · +0.5% own

SSELL$2.7K

Gupta Ashoo · VP, Finance and…Mar 20

310 sh @ $8.61 · -0.7% own

MEXER—

Gupta Ashoo · VP, Finance and…Mar 20

865 sh · +1.9% own

AGRANT◆—

Sblendorio Glenn · DirectorJan 5

45,000 sh

MEXER◆—