REGN Options Open Interest by Strike, Oct 21 Settlement
REGN open interest settled 2026-10-21 vs 2026-10-20.
Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.
Computed from the Oct 21 settlement. Next update after the Oct 22 settlement, after 5:30 a.m. PT (8:30 a.m. ET) on Friday, Oct 23, 2026.
All archived unexpired expiration/strike/type keys, including unchanged counts. Series sharing that key are combined; roots and deliverables are not retained. Zero-OI keys omitted by the archive are not reconstructed.
This page shows the 6 nearest of 16 expirations, with the 40 strikes nearest the archived reference price (2026-10-21) for each, plus the largest changes across the whole book. The complete book, 1,242 expiration/strike/type keys, is in the Markdown table.
Strike bucket on the horizontal axis, settled open contracts per bucket on the vertical axis. Calls in the accent color; puts in orange. Totals across the 6 nearest expirations, strikes from 645 to 967. Source: SquawkFlow's archive of settled open interest. Counts are contracts, not trades; they do not identify which side opened or closed a position.
REGN: largest changes in the full book, settled 2026-10-21 vs 2026-10-20
Strike
Expiry
Type
Prior OI
Settled OI
Change
540
11/27
put
0
91
+91
520
11/20
put
28
117
+89
765
10/23
put
4
42
+38
575
11/20
put
0
24
+24
740
11/06
put
30
50
+20
740
09/17
put
7
27
+20
630
11/20
put
0
18
+18
630
11/27
put
0
18
+18
665
12/18
call
0
16
+16
490
11/20
put
0
13
+13
500
11/27
put
0
13
+13
730
11/06
put
7
17
+10
850
11/20
call
31
41
+10
920
12/18
call
84
94
+10
1,020
02/19
call
3
13
+10
Expiration 2026-10-23
REGN open interest, settled 2026-10-21, expiration 2026-10-23, strikes 675 to 930
Strike
Expiry
Type
Prior OI
Settled OI
Change
675
10/23
put
2
2
0
685
10/23
put
1
1
0
690
10/23
put
45
45
0
700
10/23
put
11
10
-1
705
10/23
call
2
2
0
710
10/23
put
25
28
+3
720
10/23
put
6
6
0
725
10/23
put
1
1
0
730
10/23
call
1
1
0
730
10/23
put
3
3
0
735
10/23
put
2
2
0
740
10/23
call
14
14
0
740
10/23
put
4
4
0
745
10/23
call
1
1
0
745
10/23
put
3
3
0
747.5
10/23
call
7
7
0
750
10/23
call
14
14
0
750
10/23
put
5
5
0
752.5
10/23
call
7
7
0
752.5
10/23
put
1
1
0
755
10/23
call
4
4
0
755
10/23
put
5
5
0
760
10/23
call
6
5
-1
765
10/23
call
4
4
0
765
10/23
put
4
42
+38
770
10/23
call
35
35
0
770
10/23
put
8
9
+1
775
10/23
call
3
3
0
775
10/23
put
8
10
+2
780
10/23
call
18
18
0
780
10/23
put
90
97
+7
785
10/23
call
8
8
0
785
10/23
put
0
1
+1
790
10/23
call
13
10
-3
790
10/23
put
3
3
0
795
10/23
call
10
10
0
795
10/23
put
1
8
+7
800
10/23
call
19
19
0
800
10/23
put
3
3
0
805
10/23
call
53
53
0
810
10/23
call
10
12
+2
815
10/23
call
2
2
0
820
10/23
call
25
25
0
820
10/23
put
5
3
-2
825
10/23
call
25
26
+1
830
10/23
call
70
70
0
835
10/23
call
11
12
+1
840
10/23
call
154
158
+4
850
10/23
call
12
12
0
860
10/23
call
14
13
-1
870
10/23
call
6
6
0
880
10/23
call
2
2
0
890
10/23
call
1
1
0
900
10/23
call
2
2
0
930
10/23
call
1
1
0
Expiration 2026-10-30
REGN open interest, settled 2026-10-21, expiration 2026-10-30, strikes 670 to 940
Strike
Expiry
Type
Prior OI
Settled OI
Change
670
10/30
put
2
2
0
680
10/30
call
1
1
0
680
10/30
put
7
7
0
690
10/30
put
34
34
0
700
10/30
call
1
1
0
700
10/30
put
7
7
0
705
10/30
put
1
1
0
710
10/30
put
2
3
+1
715
10/30
put
1
1
0
720
10/30
call
5
5
0
720
10/30
put
4
5
+1
725
10/30
put
1
1
0
730
10/30
call
11
11
0
730
10/30
put
1
1
0
735
10/30
put
1
1
0
740
10/30
call
13
9
-4
740
10/30
put
4
4
0
745
10/30
put
2
2
0
750
10/30
call
13
9
-4
750
10/30
put
6
6
0
755
10/30
call
33
33
0
755
10/30
put
3
3
0
760
10/30
call
9
9
0
760
10/30
put
7
6
-1
765
10/30
put
2
2
0
770
10/30
call
38
38
0
770
10/30
put
2
2
0
775
10/30
call
4
4
0
775
10/30
put
4
6
+2
780
10/30
call
50
50
0
780
10/30
put
12
12
0
785
10/30
call
3
3
0
790
10/30
call
19
20
+1
790
10/30
put
34
34
0
795
10/30
call
3
3
0
800
10/30
call
42
44
+2
800
10/30
put
43
43
0
805
10/30
call
2
2
0
805
10/30
put
3
3
0
810
10/30
call
5
5
0
810
10/30
put
3
3
0
820
10/30
call
19
16
-3
820
10/30
put
6
6
0
825
10/30
call
3
3
0
830
10/30
call
12
12
0
840
10/30
call
6
6
0
850
10/30
call
7
9
+2
860
10/30
call
2
2
0
870
10/30
call
29
29
0
870
10/30
put
1
1
0
880
10/30
call
2
2
0
890
10/30
call
20
21
+1
900
10/30
call
4
5
+1
910
10/30
call
1
1
0
920
10/30
call
4
4
0
930
10/30
call
2
2
0
940
10/30
call
3
3
0
Expiration 2026-11-06
REGN open interest, settled 2026-10-21, expiration 2026-11-06, strikes 650 to 920
Strike
Expiry
Type
Prior OI
Settled OI
Change
650
11/06
put
1
1
0
670
11/06
call
12
12
0
680
11/06
call
1
1
0
690
11/06
put
4
4
0
700
11/06
put
1
1
0
710
11/06
put
1
1
0
720
11/06
call
6
6
0
720
11/06
put
84
84
0
730
11/06
call
13
9
-4
730
11/06
put
7
17
+10
740
11/06
call
9
8
-1
740
11/06
put
30
50
+20
750
11/06
call
4
4
0
750
11/06
put
4
4
0
760
11/06
call
7
7
0
770
11/06
call
27
27
0
770
11/06
put
1
1
0
780
11/06
call
1
1
0
780
11/06
put
0
1
+1
790
11/06
call
11
11
0
790
11/06
put
1
1
0
795
11/06
call
0
5
+5
800
11/06
call
27
33
+6
805
11/06
call
0
2
+2
810
11/06
call
2
2
0
810
11/06
put
2
2
0
815
11/06
call
0
3
+3
820
11/06
call
5
8
+3
830
11/06
call
1
2
+1
840
11/06
call
2
2
0
850
11/06
call
3
4
+1
910
11/06
call
10
10
0
920
11/06
call
1
1
0
Expiration 2026-11-13
REGN open interest, settled 2026-10-21, expiration 2026-11-13, strikes 600 to 950
Strike
Expiry
Type
Prior OI
Settled OI
Change
600
11/13
put
1
1
0
630
11/13
put
2
2
0
660
11/13
put
3
3
0
680
11/13
put
3
3
0
690
11/13
call
12
12
0
700
11/13
put
1
1
0
710
11/13
put
1
1
0
720
11/13
call
3
2
-1
730
11/13
call
1
1
0
730
11/13
put
1
1
0
740
11/13
call
3
3
0
750
11/13
call
4
4
0
760
11/13
call
1
1
0
770
11/13
call
2
2
0
780
11/13
call
2
2
0
790
11/13
call
1
1
0
800
11/13
call
2
2
0
810
11/13
call
4
8
+4
820
11/13
call
2
2
0
830
11/13
call
2
2
0
840
11/13
call
1
1
0
850
11/13
call
5
5
0
860
11/13
call
0
4
+4
870
11/13
call
2
2
0
880
11/13
call
8
8
0
890
11/13
call
1
5
+4
920
11/13
call
1
1
0
930
11/13
call
1
1
0
940
11/13
call
1
1
0
950
11/13
call
1
1
0
Expiration 2026-11-20
REGN open interest, settled 2026-10-21, expiration 2026-11-20, strikes 710 to 905
Strike
Expiry
Type
Prior OI
Settled OI
Change
710
11/20
call
5
5
0
710
11/20
put
8
8
0
715
11/20
call
8
8
0
715
11/20
put
11
11
0
720
11/20
call
12
12
0
720
11/20
put
20
20
0
725
11/20
call
18
18
0
725
11/20
put
10
10
0
730
11/20
call
9
9
0
730
11/20
put
25
25
0
735
11/20
call
4
4
0
735
11/20
put
8
8
0
740
11/20
call
12
12
0
740
11/20
put
160
160
0
745
11/20
call
11
11
0
745
11/20
put
16
16
0
750
11/20
call
35
35
0
750
11/20
put
23
23
0
755
11/20
call
12
12
0
755
11/20
put
7
7
0
760
11/20
call
26
26
0
760
11/20
put
17
15
-2
765
11/20
call
12
12
0
765
11/20
put
16
16
0
770
11/20
call
17
17
0
770
11/20
put
24
24
0
775
11/20
call
4
4
0
775
11/20
put
13
13
0
780
11/20
call
33
33
0
780
11/20
put
11
11
0
785
11/20
call
69
69
0
785
11/20
put
12
12
0
790
11/20
call
250
250
0
790
11/20
put
34
34
0
795
11/20
call
66
66
0
795
11/20
put
27
27
0
800
11/20
call
61
62
+1
800
11/20
put
24
24
0
805
11/20
call
17
17
0
805
11/20
put
13
13
0
810
11/20
call
101
101
0
810
11/20
put
8
8
0
815
11/20
call
14
19
+5
815
11/20
put
1
1
0
820
11/20
call
8
11
+3
820
11/20
put
5
5
0
825
11/20
call
13
14
+1
830
11/20
call
10
18
+8
835
11/20
call
9
9
0
840
11/20
call
15
15
0
845
11/20
call
7
7
0
850
11/20
call
31
41
+10
850
11/20
put
1
1
0
855
11/20
call
24
24
0
855
11/20
put
5
5
0
860
11/20
call
18
18
0
860
11/20
put
7
7
0
865
11/20
call
12
13
+1
870
11/20
call
4
4
0
875
11/20
call
4
4
0
880
11/20
call
109
110
+1
885
11/20
call
7
7
0
890
11/20
call
1
1
0
895
11/20
call
1
1
0
900
11/20
call
85
85
0
905
11/20
call
5
5
0
Expiration 2026-11-27
REGN open interest, settled 2026-10-21, expiration 2026-11-27, strikes 500 to 940
Strike
Expiry
Type
Prior OI
Settled OI
Change
500
11/27
put
0
13
+13
540
11/27
put
0
91
+91
610
11/27
put
2
2
0
620
11/27
put
0
6
+6
630
11/27
put
0
18
+18
660
11/27
put
0
1
+1
690
11/27
put
10
10
0
700
11/27
put
10
10
0
710
11/27
put
2
2
0
720
11/27
put
0
1
+1
740
11/27
put
1
1
0
750
11/27
put
16
16
0
760
11/27
put
6
6
0
770
11/27
call
12
12
0
770
11/27
put
18
19
+1
830
11/27
call
5
5
0
840
11/27
call
1
1
0
940
11/27
call
1
1
0
Later expirations (2026-12-18, 2027-01-15, 2027-02-19, 2027-03-19, 2027-05-21, 2027-06-17, 2027-09-17, 2028-01-21, 2028-06-16, 2029-01-19) and all other strikes are in the Markdown table.