D. E. Shaw & Co., Inc.

SEC CIK: 0001009207
Latest filing: Aug 14, 2026

SEC filings (opens in a new tab)

QUMSR holding history

Quantumsphere Acquisition Corp in every 13F filed by D. E. Shaw & Co., Inc., including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

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

Shares (Q2 2026): 125,000
Value: $21.3K
% of portfolio: <0.1%
Quarters held: 3; Since Q4 2025

Holdings of QUMSR by D. E. Shaw & Co., Inc., by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	125,000	$21.3K	<0.1%	00.0%	Unchanged	Holders
Q1 2026	125,000	$31.3K	<0.1%	00.0%	Unchanged	Holders
Q4 2025	125,000	$26.3K	<0.1%	+125,000	New	Holders