Stock chart
Ticker: GMTX Exchange: NMS


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Purchase Sale Planned purchase Planned sale Net purchase Net sale Earnings
Earnings
 
Value bought

Past 90 days

 
Value sold

Past 90 days

 
Net insiders buying

Past 90 days

 
Trades (buy and sell)

Past 90 days

Abbreviations B: Buy, S: Sell, PP: Planned purchase, PS: Planned 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
2025-03-26 2025-03-24 S Sale

Ashiya Mona

Non-Executive Director
756 -0.4%
54.11
USD 40,907
756 -0.4% 54.11 USD 40,907
2025-03-26 2025-03-24 S Sale

Ashiya Mona

Non-Executive Director
3,026 -0.4%
54.11
USD 163,737
3,026 -0.4% 54.11 USD 163,737
2025-03-26 2025-03-24 S Sale

Ashiya Mona

Non-Executive Director
1,956 -0.4%
54.11
USD 105,839
1,956 -0.4% 54.11 USD 105,839
2025-03-26 2025-03-24 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
756 -0.4%
54.11
USD 40,907
756 -0.4% 54.11 USD 40,907
2025-03-26 2025-03-24 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
3,026 -0.4%
54.11
USD 163,737
3,026 -0.4% 54.11 USD 163,737
2025-03-26 2025-03-24 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
1,956 -0.4%
54.11
USD 105,839
1,956 -0.4% 54.11 USD 105,839
2025-03-21 2025-03-21 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
1,320 -0.7%
54.00
USD 71,280
1,320 -0.7% 54.00 USD 71,280
2025-03-21 2025-03-21 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
5,279 -0.7%
54.00
USD 285,066
5,279 -0.7% 54.00 USD 285,066
2025-03-21 2025-03-21 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
3,412 -0.7%
54.00
USD 184,248
3,412 -0.7% 54.00 USD 184,248
2025-03-21 2025-03-21 S Sale

Ashiya Mona

Non-Executive Director
1,320 -0.7%
54.00
USD 71,280
1,320 -0.7% 54.00 USD 71,280
2025-03-21 2025-03-21 S Sale

Ashiya Mona

Non-Executive Director
5,279 -0.7%
54.00
USD 285,066
5,279 -0.7% 54.00 USD 285,066
2025-03-21 2025-03-21 S Sale

Ashiya Mona

Non-Executive Director
3,412 -0.7%
54.00
USD 184,248
3,412 -0.7% 54.00 USD 184,248
2025-03-21 2025-03-20 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
364 -0.2%
54.01
USD 19,660
364 -0.2% 54.01 USD 19,660
2025-03-21 2025-03-20 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
1,457 -0.2%
54.01
USD 78,693
1,457 -0.2% 54.01 USD 78,693
2025-03-21 2025-03-20 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
941 -0.2%
54.01
USD 50,823
941 -0.2% 54.01 USD 50,823
2025-03-21 2025-03-20 S Sale

Ashiya Mona

Non-Executive Director
364 -0.2%
54.01
USD 19,660
364 -0.2% 54.01 USD 19,660
2025-03-21 2025-03-20 S Sale

Ashiya Mona

Non-Executive Director
1,457 -0.2%
54.01
USD 78,693
1,457 -0.2% 54.01 USD 78,693
2025-03-21 2025-03-20 S Sale

Ashiya Mona

Non-Executive Director
941 -0.2%
54.01
USD 50,823
941 -0.2% 54.01 USD 50,823
2025-03-21 2025-03-19 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
5,228 -2.7%
54.02
USD 282,417
5,228 -2.7% 54.02 USD 282,417
2025-03-21 2025-03-19 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
20,911 -2.7%
54.02
USD 1,129,612
20,911 -2.7% 54.02 USD 1,129,612
2025-03-21 2025-03-19 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
13,517 -2.7%
54.02
USD 730,188
13,517 -2.7% 54.02 USD 730,188
2025-03-21 2025-03-19 S Sale

Ashiya Mona

Non-Executive Director
5,228 -2.7%
54.02
USD 282,417
5,228 -2.7% 54.02 USD 282,417
2025-03-21 2025-03-19 S Sale

Ashiya Mona

Non-Executive Director
20,911 -2.7%
54.02
USD 1,129,612
20,911 -2.7% 54.02 USD 1,129,612
2025-03-21 2025-03-19 S Sale

Ashiya Mona

Non-Executive Director
13,517 -2.7%
54.02
USD 730,188
13,517 -2.7% 54.02 USD 730,188
2025-03-12 2025-03-12 S Sale

Ashiya Mona

Non-Executive Director
10,733 -5.2%
54.44
USD 584,305
10,733 -5.2% 54.44 USD 584,305
2025-03-12 2025-03-12 S Sale

Ashiya Mona

Non-Executive Director
42,930 -5.2%
54.44
USD 2,337,109
42,930 -5.2% 54.44 USD 2,337,109
2025-03-12 2025-03-12 S Sale

Ashiya Mona

Non-Executive Director
27,750 -5.2%
54.44
USD 1,510,710
27,750 -5.2% 54.44 USD 1,510,710
2025-03-12 2025-03-12 S Sale

Ashiya Mona

Non-Executive Director
233 -0.1%
55.05
USD 12,827
233 -0.1% 55.05 USD 12,827
2025-03-12 2025-03-12 S Sale

Ashiya Mona

Non-Executive Director
933 -0.1%
55.05
USD 51,362
933 -0.1% 55.05 USD 51,362
2025-03-12 2025-03-12 S Sale

Ashiya Mona

Non-Executive Director
603 -0.1%
55.05
USD 33,195
603 -0.1% 55.05 USD 33,195
2025-03-12 2025-03-12 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
10,733 -5.2%
54.44
USD 584,305
10,733 -5.2% 54.44 USD 584,305
2025-03-12 2025-03-12 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
42,930 -5.2%
54.44
USD 2,337,109
42,930 -5.2% 54.44 USD 2,337,109
2025-03-12 2025-03-12 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
27,750 -5.2%
54.44
USD 1,510,710
27,750 -5.2% 54.44 USD 1,510,710
2025-03-12 2025-03-12 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
233 -0.1%
55.05
USD 12,827
233 -0.1% 55.05 USD 12,827
2025-03-12 2025-03-12 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
933 -0.1%
55.05
USD 51,362
933 -0.1% 55.05 USD 51,362
2025-03-12 2025-03-12 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
603 -0.1%
55.05
USD 33,195
603 -0.1% 55.05 USD 33,195
2025-03-12 2025-03-11 S Sale

Ashiya Mona

Non-Executive Director
3,567 -1.7%
54.01
USD 192,654
3,567 -1.7% 54.01 USD 192,654
2025-03-12 2025-03-11 S Sale

Ashiya Mona

Non-Executive Director
14,267 -1.7%
54.01
USD 770,561
14,267 -1.7% 54.01 USD 770,561
2025-03-12 2025-03-11 S Sale

Ashiya Mona

Non-Executive Director
9,222 -1.7%
54.01
USD 498,080
9,222 -1.7% 54.01 USD 498,080
2025-03-12 2025-03-11 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
3,567 -1.7%
54.01
USD 192,654
3,567 -1.7% 54.01 USD 192,654
2025-03-12 2025-03-11 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
14,267 -1.7%
54.01
USD 770,561
14,267 -1.7% 54.01 USD 770,561
2025-03-12 2025-03-11 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
9,222 -1.7%
54.01
USD 498,080
9,222 -1.7% 54.01 USD 498,080
2025-03-12 2025-03-10 S Sale

Ashiya Mona

Non-Executive Director
53 -0.0%
55.01
USD 2,916
53 -0.0% 55.01 USD 2,916
2025-03-12 2025-03-10 S Sale

Ashiya Mona

Non-Executive Director
211 -0.0%
55.01
USD 11,607
211 -0.0% 55.01 USD 11,607
2025-03-12 2025-03-10 S Sale

Ashiya Mona

Non-Executive Director
136 -0.0%
55.01
USD 7,481
136 -0.0% 55.01 USD 7,481
2025-03-12 2025-03-10 S Sale

Ashiya Mona

Non-Executive Director
26,596 -11.3%
54.29
USD 1,443,897
26,596 -11.3% 54.29 USD 1,443,897
2025-03-12 2025-03-10 S Sale

Ashiya Mona

Non-Executive Director
106,384 -11.3%
54.29
USD 5,775,587
106,384 -11.3% 54.29 USD 5,775,587
2025-03-12 2025-03-10 S Sale

Ashiya Mona

Non-Executive Director
68,766 -11.3%
54.29
USD 3,733,306
68,766 -11.3% 54.29 USD 3,733,306
2025-03-12 2025-03-10 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
53 -0.0%
55.01
USD 2,916
53 -0.0% 55.01 USD 2,916
2025-03-12 2025-03-10 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
211 -0.0%
55.01
USD 11,607
211 -0.0% 55.01 USD 11,607
2025-03-12 2025-03-10 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
136 -0.0%
55.01
USD 7,481
136 -0.0% 55.01 USD 7,481
2025-03-12 2025-03-10 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
26,596 -11.3%
54.29
USD 1,443,897
26,596 -11.3% 54.29 USD 1,443,897
2025-03-12 2025-03-10 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
106,384 -11.3%
54.29
USD 5,775,587
106,384 -11.3% 54.29 USD 5,775,587
2025-03-12 2025-03-10 S Sale

ORBIMED ADVISORS LLC

Non-Executive Director
68,766 -11.3%
54.29
USD 3,733,306
68,766 -11.3% 54.29 USD 3,733,306
2025-02-20 2025-02-18 S Sale

Yu Jonathan Yen-Wen

Chief Operating Officer

Officer
1,610 -3.8%
54.58
USD 87,874
1,610 -3.8% 54.58 USD 87,874
2025-02-20 2025-02-18 S Sale

Stephenson Pamela

Chief Commercial Officer

Officer
3,137 -4.3%
54.58
USD 171,217
3,137 -4.3% 54.58 USD 171,217
2025-02-20 2025-02-18 PS Planned sale

Khara Rahul

Chief Legal Officer

Officer
1,161 -3.0%
54.58
USD 63,367
1,161 -3.0% 54.58 USD 63,367
2025-02-20 2025-02-18 S Sale

Savage William Jacob

Chief Medical Officer

Officer
1,638 -2.3%
54.58
USD 89,402
1,638 -2.3% 54.58 USD 89,402
2025-02-20 2025-02-18 S Sale

Franchi Jean M.

Chief Financial Officer

Officer
3,136 -4.3%
54.58
USD 171,163
3,136 -4.3% 54.58 USD 171,163
2025-02-20 2025-02-18 S Sale

Quisel John D

Chief Executive Officer

Executive Director
5,574 -3.5%
54.58
USD 304,229
5,574 -3.5% 54.58 USD 304,229
2025-02-04 2025-02-03 PS Planned sale

Khara Rahul

Chief Legal Officer

Officer
1,813 -11.4%
56.01
USD 101,542
1,813 -11.4% 56.01 USD 101,542
2025-02-04 2025-02-03 PS Planned sale

Khara Rahul

Chief Legal Officer

Officer
5,687 -26.4%
55.40
USD 315,031
5,687 -26.4% 55.40 USD 315,031
2025-01-06 2025-01-02 PS Planned sale

Khara Rahul

Chief Legal Officer

Officer
2,100 -13.0%
64.13
USD 134,683
2,100 -13.0% 64.13 USD 134,683
2025-01-06 2025-01-02 PS Planned sale

Khara Rahul

Chief Legal Officer

Officer
1,400 -8.0%
62.95
USD 88,135
1,400 -8.0% 62.95 USD 88,135
2025-01-06 2025-01-02 PS Planned sale

Khara Rahul

Chief Legal Officer

Officer
4,000 -18.6%
61.96
USD 247,840
4,000 -18.6% 61.96 USD 247,840
2025-01-02 2024-12-30 PS Planned sale

Quisel John D

Chief Executive Officer

Executive Director
1,900 -2.6%
62.41
USD 118,580
1,900 -2.6% 62.41 USD 118,580
2025-01-02 2024-12-30 PS Planned sale

Quisel John D

Chief Executive Officer

Executive Director
11,112 -13.1%
61.87
USD 687,477
11,112 -13.1% 61.87 USD 687,477
2024-12-26 2024-12-23 PS Planned sale

Quisel John D

Chief Executive Officer

Executive Director
4,212 -5.5%
63.80
USD 268,733
4,212 -5.5% 63.80 USD 268,733
2024-12-26 2024-12-23 PS Planned sale

Quisel John D

Chief Executive Officer

Executive Director
12,194 -13.8%
63.12
USD 769,667
12,194 -13.8% 63.12 USD 769,667
2024-12-26 2024-12-23 PS Planned sale

Quisel John D

Chief Executive Officer

Executive Director
3,414 -3.7%
62.38
USD 212,957
3,414 -3.7% 62.38 USD 212,957
2024-12-18 2024-12-16 PS Planned sale

Quisel John D

Chief Executive Officer

Executive Director
500 -0.7%
67.20
USD 33,599
500 -0.7% 67.20 USD 33,599
2024-12-18 2024-12-16 PS Planned sale

Quisel John D

Chief Executive Officer

Executive Director
6,305 -8.0%
66.35
USD 418,361
6,305 -8.0% 66.35 USD 418,361
2024-12-18 2024-12-16 PS Planned sale

Quisel John D

Chief Executive Officer

Executive Director
5,767 -6.8%
65.58
USD 378,194
5,767 -6.8% 65.58 USD 378,194
2024-12-18 2024-12-16 PS Planned sale

Quisel John D

Chief Executive Officer

Executive Director
219 -0.3%
64.66
USD 14,160
219 -0.3% 64.66 USD 14,160
2024-12-04 2024-12-02 PS Planned sale

White William Richard

Non-Executive Director
173 -100.0%
65.33
USD 11,303
173 -100.0% 65.33 USD 11,303
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