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Insiders · Profile

EcoR1 Capital, LLC

10% owner at Atara Biotherapeutics · 10% owner at First Tracks Biotherapeutics · Director at Aktis Oncology · and 6 more. Filing since 12 Feb 2021. CIK 0001587114

ATRA Atara Biotherapeutics, Inc. 10% owner · 1 trade TRAX First Tracks Biotherapeutics, Inc. 10% owner · 1 trade AKTS Aktis Oncology, Inc. Director · 1 trade ZYME Zymeworks Inc. Director · 42 trades PRTA PROTHENA CORP PUBLIC LTD CO 10% owner · 13 trades ANAB ANAPTYSBIO, INC Director · 15 trades TNGX Tango Therapeutics, Inc. 10% owner · 2 trades VYGR Voyager Therapeutics, Inc. 10% owner · 5 trades CRVS Corvus Pharmaceuticals, Inc. 10% owner · 2 trades
Company
Date
Role
Action
Shares
Amount
Of holding
ATRA Atara Biotherapeutics, Inc.
7 May 2026
10% owner
Bought
507,407
$4.74M
48.6%
TRAX First Tracks Biotherapeutics, Inc.
20 Apr 2026
10% owner
Bought
4,705,575
$65.00M
opened
AKTS Aktis Oncology, Inc.
12 Jan 2026
Director
Bought
2,222,222
$40.00M
105%
ZYME Zymeworks Inc.
19 May 2025
Director
Bought
5,919
$69.74K
0.0%
ZYME Zymeworks Inc.
15 May 2025
Director
Bought
49,502
$565.85K
0.3%
PRTA PROTHENA CORP PUBLIC LTD CO
6 May 2025
10% owner
Sold at will
1,984,053
$15.16M
27.2%
PRTA PROTHENA CORP PUBLIC LTD CO
5 May 2025
10% owner
Sold at will
977,693
$7.93M
11.8%
PRTA PROTHENA CORP PUBLIC LTD CO
2 May 2025
10% owner
Sold at will
3,317,938
$27.74M
28.6%
ZYME Zymeworks Inc.
17 Apr 2025
Director
Bought
54,760
$630.82K
0.3%
ZYME Zymeworks Inc.
16 Apr 2025
Director
Bought
73,953
$825.59K
0.4%
ZYME Zymeworks Inc.
4 Apr 2025
Director
Bought
196,438
$2.19M
1.1%
ZYME Zymeworks Inc.
3 Apr 2025
Director
Bought
120,770
$1.43M
0.7%
ZYME Zymeworks Inc.
2 Apr 2025
Director
Bought
74,360
$881.02K
0.4%
ZYME Zymeworks Inc.
1 Apr 2025
Director
Bought
48,658
$564.65K
0.3%
ZYME Zymeworks Inc.
31 Mar 2025
Director
Bought
4,397
$51.66K
0.0%
ZYME Zymeworks Inc.
26 Mar 2025
Director
Bought
43,848
$536.86K
0.3%
ZYME Zymeworks Inc.
25 Mar 2025
Director
Bought
53,501
$690.45K
0.3%
ZYME Zymeworks Inc.
24 Mar 2025
Director
Bought
22,689
$296.85K
0.1%
ZYME Zymeworks Inc.
21 Mar 2025
Director
Bought
31,033
$396.52K
0.2%
ZYME Zymeworks Inc.
20 Mar 2025
Director
Bought
73,476
$949.88K
0.4%
ZYME Zymeworks Inc.
19 Mar 2025
Director
Bought
58,306
$737.23K
0.3%
ZYME Zymeworks Inc.
18 Mar 2025
Director
Bought
113,880
$1.44M
0.7%
ZYME Zymeworks Inc.
17 Mar 2025
Director
Bought
56,277
$688.46K
0.3%
ZYME Zymeworks Inc.
13 Mar 2025
Director
Bought
468,356
$5.85M
2.9%
ZYME Zymeworks Inc.
12 Mar 2025
Director
Bought
292,934
$3.59M
1.8%
ZYME Zymeworks Inc.
11 Mar 2025
Director
Bought
320,690
$3.69M
2.0%
ZYME Zymeworks Inc.
17 Jan 2025
Director
Bought
19,748
$274.00K
0.1%
ZYME Zymeworks Inc.
16 Jan 2025
Director
Bought
121,681
$1.69M
0.8%
ZYME Zymeworks Inc.
15 Jan 2025
Director
Bought
39,029
$546.67K
0.3%
ZYME Zymeworks Inc.
14 Jan 2025
Director
Bought
54,500
$739.27K
0.4%
ZYME Zymeworks Inc.
13 Jan 2025
Director
Bought
74,125
$992.87K
0.5%
ZYME Zymeworks Inc.
10 Jan 2025
Director
Bought
204,098
$2.68M
1.3%
ZYME Zymeworks Inc.
8 Jan 2025
Director
Bought
21,021
$295.83K
0.1%
ZYME Zymeworks Inc.
2 Jan 2025
Director
Bought
157,880
$2.33M
1.1%
ANAB ANAPTYSBIO, INC
2 Jan 2025
Director
Bought
6,646
$86.07K
0.1%
ZYME Zymeworks Inc.
31 Dec 2024
Director
Bought
146,501
$2.13M
1.0%
ANAB ANAPTYSBIO, INC
31 Dec 2024
Director
Bought
13,268
$171.51K
0.2%
ZYME Zymeworks Inc.
30 Dec 2024
Director
Bought
58,988
$853.33K
0.4%
ANAB ANAPTYSBIO, INC
30 Dec 2024
Director
Bought
65,184
$842.06K
0.8%
ZYME Zymeworks Inc.
27 Dec 2024
Director
Bought
101,659
$1.47M
0.7%
ZYME Zymeworks Inc.
26 Dec 2024
Director
Bought
16,692
$240.04K
0.1%
ZYME Zymeworks Inc.
24 Dec 2024
Director
Bought
11,958
$168.90K
0.1%
TNGX Tango Therapeutics, Inc.
7 Nov 2024
10% owner
Sold at will
1,205,442
$3.54M
10.2%
TNGX Tango Therapeutics, Inc.
6 Nov 2024
10% owner
Sold at will
1,494,558
$4.90M
11.2%
ANAB ANAPTYSBIO, INC
14 Aug 2024
10% owner
Bought
273,972
$10.00M
3.6%
ZYME Zymeworks Inc.
16 Jun 2023
10% owner
Bought
3,350,000
$27.20M
33.2%
ZYME Zymeworks Inc.
28 Mar 2023
10% owner
Bought
200,000
$1.60M
2.0%
ZYME Zymeworks Inc.
20 Jan 2023
10% owner
Bought
163,400
$1.62M
1.7%
ZYME Zymeworks Inc.
19 Jan 2023
10% owner
Bought
144,100
$1.37M
1.5%
ZYME Zymeworks Inc.
18 Jan 2023
10% owner
Bought
203,000
$2.03M
2.2%
ZYME Zymeworks Inc.
17 Jan 2023
10% owner
Bought
440,000
$4.31M
4.9%
ZYME Zymeworks Inc.
13 Jan 2023
10% owner
Bought
342,100
$3.35M
4.0%
VYGR Voyager Therapeutics, Inc.
11 Jan 2023
10% owner
Sold, plan not stated
110,000
$934.62K
2.8%
ZYME Zymeworks Inc.
11 Jan 2023
10% owner
Bought
106,300
$836.91K
1.3%
ZYME Zymeworks Inc.
10 Jan 2023
10% owner
Bought
920,000
$7.04M
12.2%
VYGR Voyager Therapeutics, Inc.
10 Jan 2023
10% owner
Sold, plan not stated
336,400
$2.71M
7.8%
VYGR Voyager Therapeutics, Inc.
9 Jan 2023
10% owner
Sold, plan not stated
456,000
$3.50M
9.6%
VYGR Voyager Therapeutics, Inc.
23 Jun 2022
10% owner
Bought
376,000
$2.13M
8.6%
VYGR Voyager Therapeutics, Inc.
21 Jun 2022
10% owner
Bought
101,400
$535.50K
2.4%
PRTA PROTHENA CORP PUBLIC LTD CO
5 May 2022
10% owner
Bought
1,062,736
$30.84M
10.1%
PRTA PROTHENA CORP PUBLIC LTD CO
5 May 2022
10% owner
Sold, plan not stated
1,062,736
$30.84M
8.4%
ANAB ANAPTYSBIO, INC
5 May 2022
10% owner
Sold, plan not stated
668,237
$14.45M
8.2%
ANAB ANAPTYSBIO, INC
5 May 2022
10% owner
Bought
668,237
$14.45M
9.8%
PRTA PROTHENA CORP PUBLIC LTD CO
12 Jan 2022
10% owner
Bought
300,000
$11.25M
2.7%
CRVS Corvus Pharmaceuticals, Inc.
1 Oct 2021
10% owner
Sold, plan not stated
2,000,000
$9.93M
96.1%
CRVS Corvus Pharmaceuticals, Inc.
30 Sep 2021
10% owner
Sold, plan not stated
3,000,000
$15.13M
59.0%
ANAB ANAPTYSBIO, INC
4 May 2021
Director
Bought
165,000
$3.84M
2.2%
ANAB ANAPTYSBIO, INC
3 May 2021
Director
Bought
20,800
$484.87K
0.3%
ANAB ANAPTYSBIO, INC
30 Apr 2021
Director
Bought
35,700
$826.82K
0.5%
ANAB ANAPTYSBIO, INC
27 Apr 2021
Director
Bought
33,800
$805.09K
0.5%
ANAB ANAPTYSBIO, INC
26 Apr 2021
Director
Bought
13,900
$330.86K
0.2%
ANAB ANAPTYSBIO, INC
23 Apr 2021
Director
Bought
99,600
$2.34M
1.4%
PRTA PROTHENA CORP PUBLIC LTD CO
24 Mar 2021
10% owner
Bought
875,000
$18.16M
8.6%
ANAB ANAPTYSBIO, INC
9 Mar 2021
10% owner
Bought
531,000
$9.93M
8.0%
ANAB ANAPTYSBIO, INC
8 Mar 2021
10% owner
Bought
2,777,800
$52.69M
72.3%
PRTA PROTHENA CORP PUBLIC LTD CO
24 Feb 2021
10% owner
Bought
10,800
$237.87K
0.1%
PRTA PROTHENA CORP PUBLIC LTD CO
23 Feb 2021
10% owner
Bought
44,400
$934.52K
0.4%
ANAB ANAPTYSBIO, INC
23 Feb 2021
10% owner
Bought
29,500
$751.66K
0.8%
PRTA PROTHENA CORP PUBLIC LTD CO
18 Feb 2021
10% owner
Bought
44,100
$162.10K
0.4%
PRTA PROTHENA CORP PUBLIC LTD CO
17 Feb 2021
10% owner
Bought
198,840
$4.67M
2.0%
PRTA PROTHENA CORP PUBLIC LTD CO
16 Feb 2021
10% owner
Bought
89,200
$2.03M
0.9%
PRTA PROTHENA CORP PUBLIC LTD CO
12 Feb 2021
10% owner
Bought
345,300
$6.96M
3.7%
82 decisions on file.