Custom Index Systems, LLC

SEC CIK: 0002003672
Latest filing: Aug 14, 2026

SEC filings (opens in a new tab)

MDB holding history

MongoDB, Inc. in every 13F filed by Custom Index Systems, LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

MDB overview All 13F holders of MDB Full Q2 2026 holdings

Shares (Q2 2026): 1,173
Value: $394.0K
% of portfolio: 0.1%
Quarters held: 4; Since Q3 2025

Holdings of MDB by Custom Index Systems, LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	1,173	$394.0K	0.1%	+141+13.7%	Added	Holders
Q1 2026	1,032	$252.6K	0.1%	+35+3.5%	Added	Holders
Q4 2025	997	$418.4K	0.2%	−477−32.4%	Reduced	Holders
Q3 2025	1,474	$457.5K	0.1%	+1,474	New	Holders