DOSSIER · 13F Holders · Q1 2026

BLACKROCK TCP CAPITAL CORP

3 institutions still hold BLACKROCK TCP CAPITAL CORP as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 09259E908·3 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$15K
visible holders
Holders
3
filers reporting
Concentration
85.71%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q1 2026

3 institutions reported BLACKROCK TCP CAPITAL CORP in Q1 2026. GROUP ONE TRADING LLC leads at 85.7% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
GROUP ONE TRADING LLC
CIK 0000932540
$13K4K0.00%Q1 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$2K6000.00%Q1 2026
03
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025