Diadema Partners LP

SEC CIK: 0002026172
Latest filing: Aug 14, 2026

SEC filings (opens in a new tab)

UPB holding history

Upstream Bio, Inc. in every 13F filed by Diadema Partners LP, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

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

Shares (Q2 2026): 19,093
Value: $132.1K
% of portfolio: <0.1%
Quarters held: 3; Since Q4 2025

Holdings of UPB by Diadema Partners LP, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	19,093	$132.1K	<0.1%	−2,516−11.6%	Reduced	Holders
Q1 2026	21,609	$194.5K	0.1%	+1,109+5.4%	Added	Holders
Q4 2025	20,500	$556.6K	0.3%	+20,500	New	Holders