Atom Investors L.P. 13F annual report
Andrew Henderson
Updated on March 15, 2026
Opened
486,316
7.97%
98,358
Closed
75,678
12.18%
14,612
40.54%
232,426
Opened
164,524
Opened
78,166
No change
9
9.45%
19,171
Closed
33,939
1,366.61%
27,587
Closed
62,398
Closed
49,950
52.00%
107,287
Closed
6,443
138.47%
8,530
587.32%
19,190
Closed
63,498
Closed
17,335
3.20%
143,557
Opened
11,108
Closed
31,571
Opened
27,741
Opened
7,689
Closed
28,689
Opened
45,707
Closed
23,267
Opened
70,885
Closed
5,156
Opened
26,994
Opened
15,819
199.28%
11,265
Opened
10,741
Closed
162,149
21.41%
34,895
Closed
42,768
Opened
3,819
Opened
67,930
Opened
55,145
Opened
91,089
Closed
15,816
Closed
52,865
Opened
49,965
Closed
81,466
Closed
19,934
Opened
27,601
Closed
84,394
Opened
50,368
7.52%
20,855
Closed
45,616
Closed
43,438
Opened
4,569
29.36%
16,445
Opened
11,489
Opened
19,509
Closed
14,913
217.22%
9,485
Opened
3,742
236.58%
6,368
Opened
2,764
Closed
8,200
Opened
6,876
Closed
6,302
Opened
46,614
Opened
31,813
Closed
2,277
37.40%
50,078
23.25%
94,130
Closed
107,193
Opened
33,580
Opened
22,307
173.26%
141,186
Opened
28,205
Opened
4,965
Closed
56,896
Opened
20,317
Closed
42,642
Opened
10,321
2.27%
22,500
150.09%
1,398
18.69%
13,342
Closed
80,911
153.25%
1,170
Closed
1,084
57.39%
185,957
86.27%
42,713
Opened
59,183
Closed
13,983
Closed
4,081
Opened
9,123
Opened
24,676
Closed
11,573
Closed
5,692
Closed
10,711
Opened
4,502
Opened
53,286
Opened
20,284
Opened
21,855
Opened
53,976
120.96%
6,105
86.73%
1,888
Opened
59,853
Closed
34,523
Closed
2,093
Closed
19,683
Opened
16,321
111.49%
18,990
94.90%
11,760
19.14%
1,559
Opened
13,804
Opened
3,918
Closed
14,094
Opened
4,938
Opened
38,026
22.30%
4,603
Closed
4,918
Opened
6,616
3.81%
14,656
Opened
79,623
Opened
16,002
Opened
3,300
Opened
11,928
Opened
127,564
Opened
2,155
120.36%
6,657
Closed
17,932
66.50%
26,684
Opened
2,382
Opened
9,819
Closed
47,401
11.78%
659
Closed
847
Opened
39,986
Opened
61,648
Opened
8,061
Closed
95,520
Closed
72,981
56.32%
2,556
Opened
6,282
Opened
15,187
Closed
28,017
Closed
22,501
Opened
5,740
Closed
22,251
Opened
4,343
Opened
10,230
Opened
5,705
Opened
7,899
Opened
23,612
Opened
5,505
Closed
13,827
Opened
4,709
Closed
1,797
Opened
22,822
Opened
27,614
Closed
66,218
Opened
32,876
Opened
21,176
Closed
5,474
64.94%
10,970
Closed
11,846
Opened
9,455
Opened
7,838
Closed
33,238
Opened
10,898
74.85%
22,365
10.82%
882
49.69%
3,871
Opened
5,348
Opened
1,472
Opened
7,402
12.21%
8,765
Opened
3,762
Opened
50,983
Opened
36,115
Opened
11,426
31.16%
4,283
Opened
6,491
Closed
2,828
Opened
994
Opened
1,304
Opened
2,515
89.07%
2,521
9.39%
4,864
Opened
1,355
20.98%
9,411
Closed
1,464
Opened
2,103
Closed
2,130
Opened
2,022
Opened
8,393
33.97%
7,576
67.00%
827
9.84%
5,269
Opened
12,268
Opened
5,247
Opened
4,838
Closed
2,343
Closed
2,951
Closed
12,504
Closed
11,439
Opened
1,470
Opened
1,052
19.82%
786
Opened
2,669
Opened
1,753
Opened
11,333
Opened
17,908
62.93%
45,898
Closed
3,813
Opened
5,149
Opened
1,645
Opened
3,134
Opened
2,350
Opened
24,056
Closed
35,707
Opened
9,798
Opened
9,267
Closed
19,877
Closed
9,767
Opened
5,999
69.34%
18,203
30.32%
13,148
Opened
2,176
Opened
3,267
Closed
62,441
Opened
9,907
Closed
10,399
Opened
3,964
Opened
2,800
Opened
11,644
Closed
1,398
Closed
16,537
Opened
184,619
Opened
1,402
Opened
3,304
Closed
1,389
Closed
2,210
Closed
677
Opened
16,869
Opened
10,117
73.67%
735
Opened
7,672
Opened
16,559
Closed
7,539
Opened
5,693
5.57%
14,068
Opened
10,192
Opened
33,559
Opened
29,142
Closed
2,012
Opened
918
Closed
16,296
Opened
655
76.07%
7,229
Closed
23,815
Opened
524
Opened
8,156
Closed
12,401
87.46%
2,462
Closed
2,139
40.64%
4,264
Opened
3,850
Closed
1,635
Opened
4,687
Opened
101,193
42.91%
592
Opened
1,060
Opened
2,125
Closed
2,968
Closed
1,690
Opened
14,081
Closed
11,868
Closed
32,270
344.89%
295,774
20.81%
13,635
Closed
2,265
Opened
4,117
Opened
20,840
Opened
3,179
64.32%
14,066
Opened
719
Opened
1,332
Closed
3,680
Opened
25,776
Opened
2,109
Opened
9,519
Closed
2,270
Closed
2,404
Closed
1,650
Opened
33,534
13.57%
6,227
Opened
4,452
Opened
20,620
Closed
5,754
Opened
3,257
Opened
4,247
Opened
6,362
Closed
3,404
4.80%
46,081
Closed
3,847
Closed
8,025
Closed
3,744
Opened
7,957
Closed
35,932
Opened
2,463
Opened
2,001
Closed
4,607
Opened
8,803
Opened
9,587
Closed
112
Closed
26,735
Opened
2,964
Opened
8,624
Opened
13,203
Opened
7,227
4.28%
78,886
Opened
1,885
Closed
6,690
5.26%
3,728
Opened
4,491
Opened
1,971
Opened
2,233
Closed
1,569
72.01%
5,104
Opened
11,549
33.73%
7,944
42.47%
2,365
Opened
619
Closed
1,612
25.47%
9,371
Closed
23,234
Closed
3,108
Opened
17,938
Opened
16,709
Opened
700
Opened
11,574
Opened
3,243
Closed
28,420
Closed
15,887
Opened
14,960
Opened
17,807
Opened
34,278
Closed
26,751
Closed
15,435
No change
53,523
Opened
13,385
7.36%
12,299
Opened
16,354
84.24%
13,294
No change
28,199
Opened
14,833
Opened
28,754
Closed
17,766
Opened
14,212
Opened
12,053
Opened
13,169
Opened
10,602
Closed
123,051
24.27%
37,362
Closed
20,814
Closed
11,294
Opened
19,921
51.23%
38,377
Closed
11,063
48.95%
49,413
Closed
33,720
Opened
17,187
Closed
43,386
Closed
44,090
Opened
12,408
Closed
24,465
Closed
10,464
Closed
26,597
Opened
14,264
Closed
12,426
Opened
51,151
35.12%
28,219
Closed
23,452
Closed
16,334
Opened
12,406
Closed
12,808
No change
18,298
Closed
18,472
Closed
16,065
33.33%
14,814
29.24%
13,107
Closed
10,948
No change
10,258
Opened
11,586
Closed
14,121
96.17%
12,563