Belvedere Trading LLC

SEC CIK: 0001632341
Latest filing: Jul 31, 2026

SEC filings (opens in a new tab)

MACK holding history

Merrimack Pharmaceuticals Inc in every 13F filed by Belvedere Trading LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

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

Shares (Q2 2023): 0; Sold out in Q2 2023
Value: $0
% of portfolio: 0.0%
Quarters held: 3; Since Q3 2022

Holdings of MACK by Belvedere Trading LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2023	0	$0	0.0%	−10,888−100.0%	Sold out	Holders
Q1 2023	10,888	$133.8K	0.1%	−28,102−72.1%	Reduced	Holders
Q4 2022	38,990	$446.8K	0.3%	+18,938+94.4%	Added	Holders
Q3 2022	20,052	$77.0K	0.1%	+20,052	New	Holders