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SIMPLEX TRADING, LLC

Position in GBDC — GOLUB CAPITAL BDC, Inc.

CIK 1488542 CHICAGO, IL

Position in GBDC

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$190,920
+$158,804 QoQ
Shares Held
14,823
+531.8% QoQ
Ownership
0.006%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
#238
of 317 holders
Holding Since
Mar 2020
10 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in GBDC Over Time

Shares Held

Position Value (USD)

Position in Asset Management

Financial Services · as of Jun 30, 2026

SIMPLEX TRADING, LLC holds $20,854,251 across 57 Asset Management names. GBDC ranks #16 (0.9% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in GBDC

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10 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $190,920 14,823
2025-09-30 $32,116 2,346
2025-06-30 $6 472
2025-03-31 $131,506 8,686
2024-12-31 $69,084 4,557
2023-06-30 $33,156 2,456
2023-03-31 $2 187
2022-06-30 $97,511 7,524
2022-03-31 $25,172 1,655
2020-03-31 $2,512 200