OITracker Cboe delayed data

Contract OI history

Back to BRK.B

Jan 21, 2028 EXPIRATION

BRK.B $640.00 Call

BRKB280121C00640000

Latest saved OI2,112Oct 23, 2026
Last change+12vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BRK.B $640.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2,1121,0560 2026-10-02: 2,049 OI2026-10-05: 2,049 OI2026-10-06: 2,049 OI2026-10-07: 2,049 OI2026-10-08: 2,049 OI2026-10-09: 2,049 OI2026-10-13: 2,094 OI2026-10-14: 2,094 OI2026-10-15: 2,094 OI2026-10-16: 2,094 OI2026-10-21: 2,100 OI2026-10-23: 2,112 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

BRK.B contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing2,112+12
Oct 21, 20262,100+6
Oct 16, 20262,0940
Oct 15, 20262,0940
Oct 14, 20262,0940
Oct 13, 20262,094+45
Oct 09, 20262,0490
Oct 08, 20262,0490
Oct 07, 20262,0490
Oct 06, 20262,0490
Oct 05, 20262,0490
Oct 02, 20262,049No prior observation