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United States Biotechnology & Medical Research

Merus NV (MRUS)

Track

The most recent insider trading activity occurred on December 29, 2025. Significant buying activity was observed from GENMAB A/S, totaling over $100 million. There were also smaller buy transactions from GENMAB A/S and sell transactions from Harry Shuman and planned/proposed sales from Peter B. Silverman.
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Ticker: MRUS Exchange: NMS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
GENMAB A/S
1 purchase — total 102,122,182 USD
Buy 29 Dec 2025
Value US$1,052,603.45 | Price 437.41 | Shares 88,429
Buy 26 Dec 2025
Value US$548,517.36 | Price 282.29 | Shares 84,065
Buy 26 Dec 2025
Value US$4,812,870.45 | Price 114.55 | Shares 75,108
Buy 24 Dec 2025
Value US$9,319,954.00 | Price 97.00 | Shares 96,082
Buy 23 Dec 2025
Value US$54,421,074.00 | Price 97.00 | Shares 561,042
Buy 22 Dec 2025
Value US$1,523,870.00 | Price 97.00 | Shares 15,710
Buy 19 Dec 2025
Value US$6,427,608.00 | Price 97.00 | Shares 66,264
Buy 18 Dec 2025
Value US$20,581,169.00 | Price 97.00 | Shares 212,177
Buy 17 Dec 2025
Value US$14,627,115.00 | Price 97.00 | Shares 150,795
Buy 16 Dec 2025
Value US$11,712,944.00 | Price 97.00 | Shares 120,752
Sale 26 Nov 2025
Value US$163,370.00 | Price 96.10 | Shares 1,700
Sale 25 Nov 2025
Value US$796,136.00 | Price 95.92 | Shares 8,300
Planned sale 17 Jul 2025
Value US$1,500,000.00 | Price 60.00 | Shares 25,000
Proposed sale 17 Jul 2025
Value US$1,500,087.00 | Price 60.00 | Shares 25,000
Planned sale 10 Jul 2025
Value US$924,275.00 | Price 55.00 | Shares 16,805
Proposed sale 10 Jul 2025
Value US$924,313.00 | Price 55.00 | Shares 16,805
Planned sale 9 Jul 2025
Value US$368,225.00 | Price 55.00 | Shares 6,695
Proposed sale 9 Jul 2025
Value US$368,240.00 | Price 55.00 | Shares 6,695
Planned sale 20 Jun 2025
Value US$1,793,840.00 | Price 52.76 | Shares 34,000
Proposed sale 20 Jun 2025
Value US$1,793,741.00 | Price 52.76 | Shares 34,000
Sale 21 Mar 2025
Value US$48,550.00 | Price 48.55 | Shares 1,000
Sale 21 Mar 2025
Value US$145,440.00 | Price 48.48 | Shares 3,000
Sale 21 Aug 2024
Value US$135,000.00 | Price 54.00 | Shares 2,500
Sale 20 Aug 2024
Value US$135,000.00 | Price 54.00 | Shares 2,500
Planned sale 27 Jun 2024
Value US$600,000.00 | Price 60.00 | Shares 10,000
Proposed sale 27 Jun 2024
Value US$600,000.00 | Price 60.00 | Shares 10,000
Planned sale 17 Jun 2024
Value US$3,504,178.00 | Price 56.52 | Shares 62,000
Proposed sale 17 Jun 2024
Value US$3,504,178.00 | Price 56.52 | Shares 62,000
Sale 12 Jun 2024
Value US$422,232.00 | Price 57.84 | Shares 7,300
Sale 10 Jun 2024
Value US$53,224.00 | Price 53.22 | Shares 1,000
Sale 4 Jun 2024
Value US$53,124.00 | Price 53.12 | Shares 1,000
Sale 4 Jun 2024
Value US$264,230.00 | Price 52.85 | Shares 5,000
Sale 19 Dec 2023
Value US$3,068.20 | Price 26.68 | Shares 115
Sale 15 Dec 2023
Value US$559,650.00 | Price 25.00 | Shares 22,386
Proposed sale 15 Dec 2023
Value US$559,650.00 | Price 25.00 | Shares 22,386
Sale 8 Dec 2023
Value US$6,110.00 | Price 24.44 | Shares 250
Planned sale 1 Dec 2023
Value US$14,133.50 | Price 24.58 | Shares 575
Proposed sale 1 Dec 2023
Value US$14,133.00 | Price 24.58 | Shares 575
Proposed sale 1 Jun 2023
Value US$12,351.00 | Price 21.48 | Shares 575
Planned sale 1 Jun 2023
Value US$12,351.00 | Price 21.48 | Shares 575
Sale 13 Dec 2022
Value US$2,326.80 | Price 13.85 | Shares 168
Planned sale 1 Dec 2022
Value US$8,826.25 | Price 15.35 | Shares 575
Planned buy 3 Nov 2022
Value US$211,431.10 | Price 14.38 | Shares 14,706
Sale 25 Aug 2022
Value US$4,014.45 | Price 24.33 | Shares 165
Planned buy 22 Aug 2022
Value US$133,558.14 | Price 22.92 | Shares 5,826
Planned buy 19 Aug 2022
Value US$16,186.93 | Price 22.99 | Shares 704
Planned buy 12 Jul 2022
Value US$99,684.59 | Price 22.97 | Shares 4,340
Planned sale 1 Jun 2022
Value US$10,528.25 | Price 18.31 | Shares 575
Sale 10 Mar 2022
Value US$1,617,000.00 | Price 26.95 | Shares 60,000
Sale 8 Oct 2021
Value US$248,105.66 | Price 27.79 | Shares 8,929
Sale 8 Oct 2021
Value US$1,620,703.19 | Price 27.79 | Shares 58,327
Sale 8 Oct 2021
Value US$2,223,225.65 | Price 27.79 | Shares 80,011
Sale 7 Oct 2021
Value US$1,914,347.51 | Price 27.53 | Shares 69,534
Sale 7 Oct 2021
Value US$10,597,105.83 | Price 27.53 | Shares 384,914
Sale 7 Oct 2021
Value US$14,618,986.57 | Price 27.53 | Shares 530,999
Buy 30 Mar 2021
Value US$531,156.50 | Price 19.75 | Shares 26,894
Buy 30 Mar 2021
Value US$2,135,093.50 | Price 19.75 | Shares 108,106
Buy 30 Mar 2021
Value US$3,258,750.00 | Price 19.75 | Shares 165,000
Buy 22 Mar 2021
Value US$176,176.00 | Price 22.75 | Shares 7,744
Buy 22 Mar 2021
Value US$1,632,449.00 | Price 22.75 | Shares 71,756
Buy 16 Mar 2021
Value US$26,932.53 | Price 23.00 | Shares 1,171
Buy 16 Mar 2021
Value US$4,502,585.69 | Price 23.00 | Shares 195,768
Buy 16 Mar 2021
Value US$1,220,381.78 | Price 23.00 | Shares 53,061
Buy 21 Jan 2021
Value US$1,074,694.50 | Price 24.75 | Shares 43,422
Buy 21 Jan 2021
Value US$8,500,239.00 | Price 24.75 | Shares 343,444
Buy 21 Jan 2021
Value US$11,330,896.50 | Price 24.75 | Shares 457,814
Buy 18 Dec 2020
Value US$722,763.60 | Price 16.05 | Shares 45,032
Buy 18 Dec 2020
Value US$1,845,236.40 | Price 16.05 | Shares 114,968
Buy 15 Sep 2020
Value US$120,531.50 | Price 11.75 | Shares 10,258
Buy 15 Sep 2020
Value US$690,253.75 | Price 11.75 | Shares 58,745
Buy 15 Sep 2020
Value US$913,574.25 | Price 11.75 | Shares 77,751
Buy 10 Sep 2020
Value US$142,234.53 | Price 11.10 | Shares 12,816
Buy 10 Sep 2020
Value US$847,613.93 | Price 11.10 | Shares 76,374
Buy 10 Sep 2020
Value US$1,114,936.27 | Price 11.10 | Shares 100,461
Buy 3 Sep 2020
Value US$160,166.63 | Price 11.17 | Shares 14,339
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
2025-12-30 2025-12-29 B Purchase
GENMAB A/S
Large shareholder
88,429 -26.0%
437.41
US$1,052,603 		88,429 -26.0% 437.41 US$1,052,603
2025-12-30 2025-12-26 B Purchase
GENMAB A/S
Large shareholder
84,065 +18.8%
282.29
US$548,517 		84,065 +18.8% 282.29 US$548,517
2025-12-29 2025-12-26 B Purchase
GENMAB A/S
Large shareholder
75,108 -5.7%
114.55
US$4,812,870 		75,108 -5.7% 114.55 US$4,812,870
2025-12-29 2025-12-24 B Purchase
GENMAB A/S
Large shareholder
96,082 +0.1%
97.00
US$9,319,954 		96,082 +0.1% 97.00 US$9,319,954
2025-12-29 2025-12-23 B Purchase
GENMAB A/S
Large shareholder
561,042 +0.8%
97.00
US$54,421,074 		561,042 +0.8% 97.00 US$54,421,074
2025-12-29 2025-12-22 B Purchase
GENMAB A/S
Large shareholder
15,710 +0.0%
97.00
US$1,523,870 		15,710 +0.0% 97.00 US$1,523,870
2025-12-22 2025-12-19 B Purchase
GENMAB A/S
Large shareholder
66,264 +0.1%
97.00
US$6,427,608 		66,264 +0.1% 97.00 US$6,427,608
2025-12-22 2025-12-18 B Purchase
GENMAB A/S
Large shareholder
212,177 +0.3%
97.00
US$20,581,169 		212,177 +0.3% 97.00 US$20,581,169
2025-12-18 2025-12-17 B Purchase
GENMAB A/S
Large shareholder
150,795 +0.2%
97.00
US$14,627,115 		150,795 +0.2% 97.00 US$14,627,115
2025-12-18 2025-12-16 B Purchase
GENMAB A/S
Large shareholder
120,752 +0.2%
97.00
US$11,712,944 		120,752 +0.2% 97.00 US$11,712,944
2025-12-10 2025-11-26 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
1,700 -13.4%
96.10
US$163,370 		1,700 -13.4% 96.10 US$163,370
2025-11-28 2025-11-25 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
8,300 -43.0%
95.92
US$796,136 		8,300 -43.0% 95.92 US$796,136
2025-07-18 2025-07-17 PlS Planned sale
2.2
Silverman Peter B.

COO & GC

Officer
25,000 -100.0%
60.00
US$1,500,000 		25,000 -100.0% 60.00 US$1,500,000
2025-07-17 2025-07-17 PrS Proposed sale
2.2
Silverman Peter B.

Officer

Officer
25,000
60.00
US$1,500,087 		25,000 60.00 US$1,500,087
2025-07-11 2025-07-10 PlS Planned sale
2.2
Silverman Peter B.

COO & GC

Officer
16,805 -100.0%
55.00
US$924,275 		16,805 -100.0% 55.00 US$924,275
2025-07-10 2025-07-10 PrS Proposed sale
2.2
Silverman Peter B.

Officer

Officer
16,805
55.00
US$924,313 		16,805 55.00 US$924,313
2025-07-11 2025-07-09 PlS Planned sale
2.2
Silverman Peter B.

COO & GC

Officer
6,695 -100.0%
55.00
US$368,225 		6,695 -100.0% 55.00 US$368,225
2025-07-09 2025-07-09 PrS Proposed sale
2.2
Silverman Peter B.

Officer

Officer
6,695
55.00
US$368,240 		6,695 55.00 US$368,240
2025-06-24 2025-06-20 PlS Planned sale
2.2
Silverman Peter B.

COO & GC

Officer
34,000 -100.0%
52.76
US$1,793,840 		34,000 -100.0% 52.76 US$1,793,840
2025-06-20 2025-06-20 PrS Proposed sale
2.2
Silverman Peter B.

Officer

Officer
34,000
52.76
US$1,793,741 		34,000 52.76 US$1,793,741
2025-03-25 2025-03-21 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
1,000 -8.3%
48.55
US$48,550 		1,000 -8.3% 48.55 US$48,550
2025-03-25 2025-03-21 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
3,000 -20.0%
48.48
US$145,440 		3,000 -20.0% 48.48 US$145,440
2024-08-22 2024-08-21 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
2,500 -26.3%
54.00
US$135,000 		2,500 -26.3% 54.00 US$135,000
2024-08-22 2024-08-20 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
2,500 -26.3%
54.00
US$135,000 		2,500 -26.3% 54.00 US$135,000
2024-06-28 2024-06-27 PlS Planned sale
2.2
Silverman Peter B.

COO & GC

Officer
10,000 -100.0%
60.00
US$600,000 		10,000 -100.0% 60.00 US$600,000
2024-06-27 2024-06-27 PrS Proposed sale
2.2
Silverman Peter B.

Officer

Officer
10,000
60.00
US$600,000 		10,000 60.00 US$600,000
2024-06-20 2024-06-17 PlS Planned sale
2.2
Silverman Peter B.

COO & GC

Officer
62,000 -100.0%
56.52
US$3,504,178 		62,000 -100.0% 56.52 US$3,504,178
2024-06-17 2024-06-17 PrS Proposed sale
2.2
Silverman Peter B.

Officer

Officer
62,000
56.52
US$3,504,178 		62,000 56.52 US$3,504,178
2024-06-12 2024-06-12 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
7,300 -51.0%
57.84
US$422,232 		7,300 -51.0% 57.84 US$422,232
2024-06-12 2024-06-10 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
1,000 -12.5%
53.22
US$53,224 		1,000 -12.5% 53.22 US$53,224
2024-06-06 2024-06-04 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
1,000 -12.5%
53.12
US$53,124 		1,000 -12.5% 53.12 US$53,124
2024-06-06 2024-06-04 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
5,000 -41.7%
52.85
US$264,230 		5,000 -41.7% 52.85 US$264,230
2023-12-20 2023-12-19 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
115 -1.6%
26.68
US$3,068 		115 -1.6% 26.68 US$3,068
2023-12-18 2023-12-15 S Sale
2.2
Silverman Peter B.

COO & GC

Officer
22,386 -100.0%
25.00
US$559,650 		22,386 -100.0% 25.00 US$559,650
2023-12-15 2023-12-15 PrS Proposed sale
2.2
Silverman Peter B.

Officer

Officer
22,386
25.00
US$559,650 		22,386 25.00 US$559,650
2023-12-12 2023-12-08 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
250 -3.4%
24.44
US$6,110 		250 -3.4% 24.44 US$6,110
2023-12-04 2023-12-01 PlS Planned sale
3.4
Shuman Harry

VP Controller, PAO

Officer
575 -7.2%
24.58
US$14,134 		575 -7.2% 24.58 US$14,134
2023-12-01 2023-12-01 PrS Proposed sale
3.4
Shuman Harry

Officer

Officer
575
24.58
US$14,133 		575 24.58 US$14,133
2023-06-01 2023-06-01 PrS Proposed sale
3.4
Shuman Harry

Officer

Officer
575
21.48
US$12,351 		575 21.48 US$12,351
2023-06-01 2023-06-01 PlS Planned sale
3.4
Shuman Harry

VP Controller, PAO

Officer
575 -9.6%
21.48
US$12,351 		575 -9.6% 21.48 US$12,351
2022-12-14 2022-12-13 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
168 -4.6%
13.85
US$2,327 		168 -4.6% 13.85 US$2,327
2022-12-01 2022-12-01 PlS Planned sale
3.4
Shuman Harry

VP Controller, PAO

Officer
575 -13.5%
15.35
US$8,826 		575 -13.5% 15.35 US$8,826
2022-11-03 2022-11-03 PP Planned purchase
Lundberg Sven Ante

President, CEO & PFO

Executive Director
14,706 +56.8%
14.38
US$211,431 		14,706 +56.8% 14.38 US$211,431
2022-08-29 2022-08-25 S Sale
3.4
Shuman Harry

VP Controller, PAO

Officer
165 -8.6%
24.33
US$4,014 		165 -8.6% 24.33 US$4,014
2022-08-23 2022-08-22 PP Planned purchase
Lundberg Sven Ante

President, CEO & PFO

Executive Director
5,826 +29.1%
22.92
US$133,558 		5,826 +29.1% 22.92 US$133,558
2022-08-22 2022-08-19 PP Planned purchase
Lundberg Sven Ante

President, CEO & PFO

Executive Director
704 +3.6%
22.99
US$16,187 		704 +3.6% 22.99 US$16,187
2022-07-13 2022-07-12 PP Planned purchase
Lundberg Sven Ante

President, CEO & PFO

Executive Director
4,340 +28.9%
22.97
US$99,685 		4,340 +28.9% 22.97 US$99,685
2022-06-03 2022-06-01 PlS Planned sale
3.4
Shuman Harry

VP Controller, PAO

Officer
575 -23.0%
18.31
US$10,528 		575 -23.0% 18.31 US$10,528
2022-03-11 2022-03-10 S Sale
2.2
Silverman Peter B.

EVP, GC and Head of Utrecht

Officer
60,000 -100.0%
26.95
US$1,617,000 		60,000 -100.0% 26.95 US$1,617,000
2021-10-08 2021-10-08 S Sale
4.0
BVF PARTNERS L P/IL
Large shareholder
8,929 -3.7%
27.79
US$248,106 		8,929 -3.7% 27.79 US$248,106
2021-10-08 2021-10-08 S Sale
4.0
BVF PARTNERS L P/IL
Large shareholder
58,327 -3.7%
27.79
US$1,620,703 		58,327 -3.7% 27.79 US$1,620,703
2021-10-08 2021-10-08 S Sale
4.0
BVF PARTNERS L P/IL
Large shareholder
80,011 -3.7%
27.79
US$2,223,226 		80,011 -3.7% 27.79 US$2,223,226
2021-10-08 2021-10-07 S Sale
4.0
BVF PARTNERS L P/IL
Large shareholder
69,534 -22.3%
27.53
US$1,914,348 		69,534 -22.3% 27.53 US$1,914,348
2021-10-08 2021-10-07 S Sale
4.0
BVF PARTNERS L P/IL
Large shareholder
384,914 -19.6%
27.53
US$10,597,106 		384,914 -19.6% 27.53 US$10,597,106
2021-10-08 2021-10-07 S Sale
4.0
BVF PARTNERS L P/IL
Large shareholder
530,999 -19.7%
27.53
US$14,618,987 		530,999 -19.7% 27.53 US$14,618,987
2021-04-01 2021-03-30 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
26,894 +6.2%
19.75
US$531,156 		26,894 +6.2% 19.75 US$531,156
2021-04-01 2021-03-30 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
108,106 +3.9%
19.75
US$2,135,094 		108,106 +3.9% 19.75 US$2,135,094
2021-04-01 2021-03-30 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
165,000 +4.5%
19.75
US$3,258,750 		165,000 +4.5% 19.75 US$3,258,750
2021-03-24 2021-03-22 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
7,744 +1.8%
22.75
US$176,176 		7,744 +1.8% 22.75 US$176,176
2021-03-24 2021-03-22 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
71,756 +2.0%
22.75
US$1,632,449 		71,756 +2.0% 22.75 US$1,632,449
2021-03-18 2021-03-16 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
1,171 +0.3%
23.00
US$26,933 		1,171 +0.3% 23.00 US$26,933
2021-03-18 2021-03-16 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
195,768 +7.6%
23.00
US$4,502,586 		195,768 +7.6% 23.00 US$4,502,586
2021-03-18 2021-03-16 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
53,061 +1.5%
23.00
US$1,220,382 		53,061 +1.5% 23.00 US$1,220,382
2021-01-25 2021-01-21 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
43,422 +11.3%
24.75
US$1,074,694 		43,422 +11.3% 24.75 US$1,074,694
2021-01-25 2021-01-21 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
343,444 +15.3%
24.75
US$8,500,239 		343,444 +15.3% 24.75 US$8,500,239
2021-01-25 2021-01-21 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
457,814 +15.0%
24.75
US$11,330,896 		457,814 +15.0% 24.75 US$11,330,896
2020-12-22 2020-12-18 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
45,032 +2.0%
16.05
US$722,764 		45,032 +2.0% 16.05 US$722,764
2020-12-22 2020-12-18 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
114,968 +3.9%
16.05
US$1,845,236 		114,968 +3.9% 16.05 US$1,845,236
2020-09-17 2020-09-15 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
10,258 +2.8%
11.75
US$120,532 		10,258 +2.8% 11.75 US$120,532
2020-09-17 2020-09-15 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
58,745 +2.7%
11.75
US$690,254 		58,745 +2.7% 11.75 US$690,254
2020-09-17 2020-09-15 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
77,751 +2.7%
11.75
US$913,574 		77,751 +2.7% 11.75 US$913,574
2020-09-14 2020-09-10 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
12,816 +3.6%
11.10
US$142,235 		12,816 +3.6% 11.10 US$142,235
2020-09-14 2020-09-10 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
76,374 +3.7%
11.10
US$847,614 		76,374 +3.7% 11.10 US$847,614
2020-09-14 2020-09-10 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
100,461 +3.6%
11.10
US$1,114,936 		100,461 +3.6% 11.10 US$1,114,936
2020-09-08 2020-09-03 B Purchase
4.0
BVF PARTNERS L P/IL
Large shareholder
14,339 +4.2%
11.17
US$160,167 		14,339 +4.2% 11.17 US$160,167
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