13F Insight
DOSSIER · 13F-HR · Q1 2026

SIMPLEX TRADING, LLC

$149.1B in tracked AUM across 10,161 positions as of Q1 2026.

ST
CIK 0001488542 · last filed Mar 31, 2026
Total AUM
$149.1B
as of Q1 2026
Holdings
10,161
—
positions
Whale Score
76
76
strong
Activity
—
no data
changes this Q
AI Analysis · Q1 2026

Simplex Trading reported $149.1B across 10,161 positions for Q1 2026, down from $177.4B. The book is an options market-making and derivatives inventory rather than a conviction portfolio — its largest exposures are SPDR S&P 500 (SPY) sleeves totaling roughly $41B, Invesco QQQ ($12.5B across legs) and iShares index funds, alongside paired single-stock options on Tesla, NVIDIA and Meta. The quarter saw large reductions across QQQ (-$2.9B) and Tesla/NVIDIA derivative legs as inventory turned over; sector classification is largely structural (Unknown), reflecting the derivative nature of the positions.

An index-derivative core. The dominant exposures are S&P 500 and Nasdaq index wrappers: SPDR S&P 500 (SPY) sleeves total roughly $41B (18.39% + 9.44% across reported legs), with Invesco QQQ at about $12.5B and iShares index funds adding several billion more. These reflect hedged inventory and options positioning around the most liquid index products, not directional bets.

Paired single-stock options. The single-name exposures appear as paired legs on the same underlyings — Tesla (~$6.5B across legs), NVIDIA (~$6.7B) and Meta (~$2.4B) — a signature of options market-making where calls and puts on a name are carried simultaneously. SPDR Gold (~$2.4B) rounds out the liquid hedging set.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
78462F953
STATE STR SPDR S&P 500 ETF T
$27.4B42.1M18.4%02
78462F903
STATE STR SPDR S&P 500 ETF T
$14.1B21.7M9.4%03
46090E953
INVESCO QQQ TR
$6.5B11.3M4.4%04
46090E903
INVESCO QQQ TR
$6.0B10.4M4.0%05
464287957
ISHARES TR
$5.1B34.2M3.4%06
464287907
ISHARES TR
$3.9B33.4M2.6%07
88160R901
TESLA INC
$3.4B9.2M2.3%08
67066G954
NVIDIA CORPORATION
$3.4B19.2M2.2%09
67066G904
NVIDIA CORPORATION
$3.3B19.1M2.2%10
88160R951
TESLA INC
$3.1B8.3M2.1%

Filing history

2026Q1Mar 31
$149.1B▼ 16.0%
10,161 positionsView →2025Q4Dec 31
$177.4B▼ 9.0%
9,381 positionsView →2025Q3Sep 30
$194.9B▲ 11.6%
10,359 positionsView →2025Q2Jun 30
$174.6B▲ 11.8%
9,904 positionsLocked2025Q1Mar 31
$156.2B▼ 12.6%
9,739 positionsLocked2024Q4Dec 31
$178.6B▲ 4.8%
9,701 positionsLocked2024Q3Sep 30
$170.4B▲ 5.3%
9,646 positionsLocked2024Q2Jun 30
$161.9B▼ 6.5%
9,954 positionsLocked2024Q1Mar 31
$173.1B▲ 10.7%
10,037 positionsLocked2023Q4Dec 31
$156.4B▲ 23.0%
9,984 positionsLocked2023Q3Sep 30
$127.1B▲ 4.5%
9,858 positionsLocked2023Q2Jun 30
$121.6B▲ 111133.5%
10,161 positionsLocked
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