United States Biotechnology & Medical Research

4D Molecular Therapeutics Inc (FDMT)

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Over the past 90 days, 4D Molecular Therapeutics Inc. saw 15 insider transactions, all of which were sales. Executives, including David Kirn and Scott Bizily, offloaded shares totaling approximately $5.63 million. These transactions occurred following the company's May 2026 earnings report, which showed an EPS miss, amid a 3.2% decline in the stock price.
Ticker: FDMT Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for 4D Molecular Therapeutics Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Proposed sale 4 Aug 2026
Value US$4,044,139.80 | Price 419.07 | Shares 9,866
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-08-04 2026-08-04 PrS Proposed sale
David Kirn

Officer

Officer
9,866
419.07
US$4,044,140 		9,866 419.07 US$4,044,140
2026-08-04 2026-08-03 PlS Planned sale
Kirn David

See Remarks

Executive Director
77,320 +14.7%
468.34
US$2,914,244 		77,320 +14.7% 468.34 US$2,914,244
2026-08-03 2026-08-03 PrS Proposed sale
David Kirn

Officer

Officer
7,228
22.46
US$666,669 		7,228 22.46 US$666,669
2026-07-14 2026-07-10 PlS Planned sale
Kirn David

See Remarks

Executive Director
442 -0.0%
12.84
US$5,673 		442 -0.0% 12.84 US$5,673
2026-07-14 2026-07-10 PlS Planned sale
Kirn David

See Remarks

Executive Director
15,283 -1.7%
12.01
US$183,560 		15,283 -1.7% 12.01 US$183,560
2026-07-10 2026-07-10 PrS Proposed sale
David Kirn

Officer

Officer
15,725
12.31
US$193,575 		15,725 12.31 US$193,575
2026-07-14 2026-07-09 PlS Planned sale
Kirn David

See Remarks

Executive Director
42,608 -4.5%
12.87
US$548,177 		42,608 -4.5% 12.87 US$548,177
2026-07-09 2026-07-09 PrS Proposed sale
David Kirn

Officer

Officer
42,608
12.89
US$549,217 		42,608 12.89 US$549,217
2026-07-02 2026-06-30 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
6,566 -43.2%
14.00
US$91,924 		6,566 -43.2% 14.00 US$91,924
2026-06-30 2026-06-30 PrS Proposed sale
3.7
SCOTT BIZILY

Officer

Officer
6,566
12.88
US$84,570 		6,566 12.88 US$84,570
2026-06-25 2026-06-23 S Sale
3.7
Bizily Scott

Chief Legal Officer

Officer
9,810 -53.2%
12.00
US$117,720 		9,810 -53.2% 12.00 US$117,720
2026-06-23 2026-06-23 PrS Proposed sale
3.7
SCOTT BIZILY

Officer

Officer
9,810
10.42
US$102,220 		9,810 10.42 US$102,220
2026-06-23 2026-06-22 PlS Planned sale
Kirn David

See Remarks

Executive Director
114,746 -10.9%
10.47
US$1,200,851 		114,746 -10.9% 10.47 US$1,200,851
2026-06-22 2026-06-22 PrS Proposed sale
David Kirn

Officer

Officer
114,746
10.42
US$1,195,653 		114,746 10.42 US$1,195,653
2026-06-22 2026-06-22 PrS Proposed sale
David Kirn

Officer

Officer
114,746
10.42
US$1,195,653 		114,746 10.42 US$1,195,653
2026-06-02 2026-06-01 PlS Planned sale
Kirn David

See Remarks

Executive Director
1,922 -0.2%
10.02
US$19,258 		1,922 -0.2% 10.02 US$19,258
2026-06-01 2026-06-01 PrS Proposed sale
David Kirn

Officer

Officer
1,922
9.71
US$18,663 		1,922 9.71 US$18,663
2026-03-24 2026-03-20 S Sale
2.1
Gupta Ashoo

VP, Finance and Controller

Officer
80 -0.2%
8.61
US$689 		80 -0.2% 8.61 US$689
2026-03-24 2026-03-20 S Sale
2.1
Gupta Ashoo

VP, Finance and Controller

Officer
310 -0.7%
8.61
US$2,669 		310 -0.7% 8.61 US$2,669
2025-12-23 2025-12-20 S Sale
2.1
Gupta Ashoo

VP, Finance and Controller

Officer
79 -0.2%
8.68
US$686 		79 -0.2% 8.68 US$686
2025-12-23 2025-12-20 S Sale
2.1
Gupta Ashoo

VP, Finance and Controller

Officer
310 -0.7%
8.68
US$2,691 		310 -0.7% 8.68 US$2,691
2025-12-19 2025-12-16 S Sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,635 -31.3%
10.90
US$17,822 		1,635 -31.3% 10.90 US$17,822
2025-12-16 2025-12-16 PrS Proposed sale
3.7
SCOTT BIZILY

Officer

Officer
1,635
10.95
US$17,903 		1,635 10.95 US$17,903
2025-11-19 2025-11-17 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,635 -31.3%
10.59
US$17,315 		1,635 -31.3% 10.59 US$17,315
2025-11-17 2025-11-17 PrS Proposed sale
3.7
SCOTT BIZILY

Officer

Officer
1,635
10.79
US$17,642 		1,635 10.79 US$17,642
2025-10-27 2025-10-24 S Sale
3.7
Bizily Scott

Chief Legal Officer

Officer
2,678 -42.7%
12.00
US$32,136 		2,678 -42.7% 12.00 US$32,136
2025-10-24 2025-10-24 PrS Proposed sale
3.7
SCOTT BIZILY

Officer

Officer
1,816
10.00
US$18,160 		1,816 10.00 US$18,160
2025-10-20 2025-10-16 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,635 -24.0%
10.17
US$16,628 		1,635 -24.0% 10.17 US$16,628
2025-10-14 2025-10-09 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
2,408 -31.7%
10.00
US$24,080 		2,408 -31.7% 10.00 US$24,080
2025-09-26 2025-09-23 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
2,407 -24.1%
8.00
US$19,256 		2,407 -24.1% 8.00 US$19,256
2025-09-23 2025-09-23 PrS Proposed sale
3.7
SCOTT BIZILY

Officer

Officer
7,312
7.40
US$54,109 		7,312 7.40 US$54,109
2024-09-18 2024-09-16 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
500 -6.9%
16.33
US$8,165 		500 -6.9% 16.33 US$8,165
2024-08-21 2024-08-19 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
500 -6.9%
15.00
US$7,500 		500 -6.9% 15.00 US$7,500
2024-07-18 2024-07-16 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,750 -20.5%
27.11
US$47,442 		1,750 -20.5% 27.11 US$47,442
2024-07-15 2024-07-11 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,996 -22.7%
25.00
US$49,900 		1,996 -22.7% 25.00 US$49,900
2024-07-12 2024-07-10 PlS Planned sale
Kirn David

Chief Executive Officer

Executive Director
12,923 -1.2%
22.49
US$290,598 		12,923 -1.2% 22.49 US$290,598
2024-07-10 2024-07-10 PrS Proposed sale
David Kirn

Officer

Officer
12,923
23.21
US$299,943 		12,923 23.21 US$299,943
2024-07-03 2024-07-01 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
4,248 -71.0%
21.36
US$90,758 		4,248 -71.0% 21.36 US$90,758
2024-07-01 2024-07-01 PrS Proposed sale
3.7
SCOTT BIZILY

Officer

Officer
9,498
20.99
US$199,363 		9,498 20.99 US$199,363
2024-06-26 2024-06-24 PlS Planned sale
Kirn David

Chief Executive Officer

Executive Director
12,930 -1.2%
23.10
US$298,711 		12,930 -1.2% 23.10 US$298,711
2024-06-25 2024-06-24 PrS Proposed sale
David Kirn

Officer

Officer
12,930
23.25
US$300,622 		12,930 23.25 US$300,622
2024-06-24 2024-06-24 PrS Proposed sale
David Kirn

Officer

Officer
12,930
23.25
US$300,622 		12,930 23.25 US$300,622
2024-06-20 2024-06-17 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,750 -50.2%
23.71
US$41,494 		1,750 -50.2% 23.71 US$41,494
2024-05-20 2024-05-16 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
467 -21.2%
25.75
US$12,027 		467 -21.2% 25.75 US$12,027
2024-05-20 2024-05-16 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,283 -36.8%
25.34
US$32,514 		1,283 -36.8% 25.34 US$32,514
2024-04-18 2024-04-16 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,750 -50.2%
25.74
US$45,045 		1,750 -50.2% 25.74 US$45,045
2024-04-03 2024-04-01 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
8,153 -82.4%
31.78
US$259,102 		8,153 -82.4% 31.78 US$259,102
2024-04-01 2024-04-01 PrS Proposed sale
3.7
SCOTT BIZILY

Officer

Officer
13,403
31.86
US$427,020 		13,403 31.86 US$427,020
2024-03-29 2024-03-27 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
5,833 -77.1%
35.04
US$204,410 		5,833 -77.1% 35.04 US$204,410
2024-03-20 2024-03-18 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,750 -50.2%
31.27
US$54,722 		1,750 -50.2% 31.27 US$54,722
2024-02-29 2024-02-27 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,909 -52.4%
30.00
US$57,270 		1,909 -52.4% 30.00 US$57,270
2024-02-21 2024-02-16 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,750 -50.2%
27.67
US$48,422 		1,750 -50.2% 27.67 US$48,422
2024-02-12 2024-02-08 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,996 -53.5%
27.50
US$54,890 		1,996 -53.5% 27.50 US$54,890
2024-02-12 2024-02-08 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
2,916 -62.7%
27.50
US$80,190 		2,916 -62.7% 27.50 US$80,190
2024-02-12 2024-02-08 PlS Planned sale
3.7
Bizily Scott

Chief Legal Officer

Officer
1,332 -43.4%
27.50
US$36,630 		1,332 -43.4% 27.50 US$36,630
2024-02-12 2024-02-08 PlS Planned sale
Kirn David

Chief Executive Officer

Executive Director
92,001 -8.0%
27.13
US$2,495,822 		92,001 -8.0% 27.13 US$2,495,822
2024-02-08 2024-02-08 PrS Proposed sale
David Kirn

Officer

Officer
92,001
26.90
US$2,474,827 		92,001 26.90 US$2,474,827
2024-02-08 2024-02-08 PrS Proposed sale
3.7
SCOTT BIZILY

Officer

Officer
17,738
28.24
US$500,921 		17,738 28.24 US$500,921
2024-02-07 2024-02-05 PlS Planned sale
Kim Robert Young

Chief Medical Officer

Officer
552 -34.6%
30.05
US$16,588 		552 -34.6% 30.05 US$16,588
2024-02-07 2024-02-05 PlS Planned sale
Kim Robert Young

Chief Medical Officer

Officer
6,000 -79.0%
30.05
US$180,300 		6,000 -79.0% 30.05 US$180,300
2024-02-07 2024-02-05 PlS Planned sale
Kim Robert Young

Chief Medical Officer

Officer
6,000 -79.0%
30.05
US$180,300 		6,000 -79.0% 30.05 US$180,300
2024-02-07 2024-02-05 PlS Planned sale
Kim Robert Young

Chief Medical Officer

Officer
12,000 -88.3%
30.05
US$360,600 		12,000 -88.3% 30.05 US$360,600
2024-01-25 2024-01-23 PlS Planned sale
Kirn David

Chief Executive Officer

Executive Director
5,696 -0.5%
18.41
US$104,851 		5,696 -0.5% 18.41 US$104,851
2024-01-23 2024-01-23 PrS Proposed sale
David Kirn

Officer

Officer
5,696
18.46
US$105,148 		5,696 18.46 US$105,148
2024-01-08 2024-01-05 PlS Planned sale
Kirn David

Chief Executive Officer

Executive Director
133 -0.0%
20.11
US$2,674 		133 -0.0% 20.11 US$2,674
2024-01-08 2024-01-05 PlS Planned sale
Kirn David

Chief Executive Officer

Executive Director
28,104 -2.4%
19.56
US$549,804 		28,104 -2.4% 19.56 US$549,804
2024-01-05 2024-01-05 PrS Proposed sale
David Kirn

Officer

Officer
28,237
19.59
US$553,163 		28,237 19.59 US$553,163
2024-01-08 2024-01-04 PlS Planned sale
Kirn David

Chief Executive Officer

Executive Director
40,732 -3.3%
20.31
US$827,202 		40,732 -3.3% 20.31 US$827,202
2024-01-05 2024-01-04 S Sale
3.2
VIKING GLOBAL INVESTORS LP
Large shareholder
540,000 -11.3%
19.53
US$10,546,200 		540,000 -11.3% 19.53 US$10,546,200
2024-01-04 2024-01-04 PrS Proposed sale
David Kirn

Officer

Officer
40,732
20.05
US$816,677 		40,732 20.05 US$816,677
2024-01-08 2023-12-18 PlS Planned sale
Kirn David

Chief Executive Officer

Executive Director
4,702 -0.4%
18.13
US$85,243 		4,702 -0.4% 18.13 US$85,243
2023-12-18 2023-12-18 PrS Proposed sale
David Kirn

Officer

Officer
4,702
18.73
US$88,068 		4,702 18.73 US$88,068
2024-01-08 2023-12-15 PlS Planned sale
Kirn David

Chief Executive Officer

Executive Director
28,632 -2.3%
17.27
US$494,432 		28,632 -2.3% 17.27 US$494,432
2023-12-15 2023-12-15 PrS Proposed sale
David Kirn

Officer

Officer
28,632
17.76
US$508,504 		28,632 17.76 US$508,504
2023-06-12 2023-06-08 PlS Planned sale
3.7
Bizily Scott

Chief Legal and HR Officer

Officer
3,750 -68.3%
20.85
US$78,188 		3,750 -68.3% 20.85 US$78,188
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