Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$146M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$108M |
| 3 |
Apple
AAPL
|
+$62.9M |
| 4 |
Tesla
TSLA
|
+$51.9M |
| 5 |
Micron Technology
MU
|
+$39.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$108M |
| 2 |
Meta Platforms (Facebook)
META
|
+$104M |
| 3 |
Advanced Micro Devices
AMD
|
+$92.1M |
| 4 |
Amazon
AMZN
|
+$90.3M |
| 5 |
TSMC
TSM
|
+$82.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.28% |
| 2 | Technology | 0.76% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.19% |
| 5 | Healthcare | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
7926
PUT
Puma Biotechnology
PBYI
$581M
| $7.3K | ﹤0.01% |
900
+700
| +350% | +$5.12K |
2025 Q4
2 quarters
|
|
7927
Northern Trust Morningstar Global Upstream Natural Resources ETF
GUNR
$7B
| $7.29K | ﹤0.01% |
148
-222
| -60% | -$11.9K |
2026 Q1
1 quarter
|
|
7928
CALL
PSQ Holdings
PSQH
$10.9M
| $7.29K | ﹤0.01% |
1,207
-366
| -23% | -$3.24K |
2023 Q2
12 quarters
|
|
7929
PUT
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$589M
| $7.26K | ﹤0.01% |
+100
| New | +$7.17K |
2026 Q2
0 quarters
|
|
7930
State Street SPDR Portfolio Corporate Bond ETF
SPBO
$2.14B
| $7.23K | ﹤0.01% |
+249
| New | +$7.22K |
2026 Q2
0 quarters
|
|
7931
E.W. Scripps
SSP
$231M
| $7.21K | ﹤0.01% |
2,604
-4,326
| -62% | -$16.4K |
2024 Q3
7 quarters
|
|
7932
Defiance Daily Target 2x Short QBTS ETF
QBTZ
$60.2M
| $7.21K | ﹤0.01% |
+376
| New | +$28.6K |
2026 Q2
0 quarters
|
|
7933
Sui Group Holdings
SUIG
$91.4M
| $7.2K | ﹤0.01% |
6,208
-3,992
| -39% | -$5.75K |
2025 Q3
3 quarters
|
|
7934
CALL
Enerpac Tool Group
EPAC
$1.82B
| $7.17K | ﹤0.01% |
+200
| New | +$7.01K |
2026 Q2
0 quarters
|
|
7935
CALL
Tiptree Inc
TIPT
$611M
| $7.17K | ﹤0.01% |
400
-11,200
| -97% | -$194K |
2025 Q3
3 quarters
|
|
7936
Clipper Realty
CLPR
$49.9M
| $7.16K | ﹤0.01% |
+2,632
| New | +$8.3K |
2026 Q2
0 quarters
|
|
7937
Betterware México
BWMX
$595M
| $7.14K | ﹤0.01% |
397
+312
| +367% | +$5.46K |
2026 Q1
1 quarter
|
|
7938
High Templar Tech Ltd
HTT
$312M
| $7.13K | ﹤0.01% |
2,785
-11,762
| -81% | -$30.6K |
2024 Q2
8 quarters
|
|
7939
CALL
Insight Molecular Diagnostics
IMDX
$92.9M
| $7.08K | ﹤0.01% |
1,200
| – | – |
2025 Q4
2 quarters
|
|
7940
Seadrill
SDRL
$3.08B
| $7.07K | ﹤0.01% |
187
+126
| +207% | +$5.87K |
2026 Q1
1 quarter
|
|
7941
PUT
W.R. Berkley
WRB
$28B
| $7.05K | ﹤0.01% |
100
| – | – |
2022 Q4
14 quarters
|
|
7942
CALL
Century Casinos
CNTY
$21.5M
| $7.04K | ﹤0.01% |
+5,500
| New | +$7.72K |
2026 Q2
0 quarters
|
|
7943
CALL
Sol Strategies Inc
STKE
$50M
| $7.02K | ﹤0.01% |
6,000
-18,100
| -75% | -$24.5K |
2025 Q3
3 quarters
|
|
7944
CALL
Kennametal
KMT
$2.26B
| $7.01K | ﹤0.01% |
200
| – | – |
2018 Q2
32 quarters
|
|
7945
CALL
WidePoint Corp
WYY
$64.9M
| $7K | ﹤0.01% |
+400
| New | +$3.74K |
2026 Q2
0 quarters
|
|
7946
NIQ Global Intelligence PLC
NIQ
$5.86B
| $6.99K | ﹤0.01% |
748
-18
| -2% | -$174 |
2026 Q1
1 quarter
|
|
7947
Kartoon Studios
TOON
$31.2M
| $6.99K | ﹤0.01% |
+9,848
| New | +$7.05K |
2026 Q2
0 quarters
|
|
7948
CALL
Core Laboratories
CLB
$431M
| $6.99K | ﹤0.01% |
600
-1,900
| -76% | -$27.1K |
2015 Q1
45 quarters
|
|
7949
CALL
Oxford Industries
OXM
$425M
| $6.97K | ﹤0.01% |
200
| – | – |
2026 Q1
1 quarter
|
|
7950
PUT
Driven Brands
DRVN
$1.95B
| $6.97K | ﹤0.01% |
500
-6,200
| -93% | -$81.6K |
2023 Q1
13 quarters
|
|
Similar funds
Simplex Trading's Q2 2026 Portfolio in Review
As of Q2 2026, Simplex Trading held 10,638 positions worth $171B, up 14% from $149B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2026 filing shows 1,714 new, 3,712 increased, 3,486 reduced and 1,487 closed positions. Its largest new stake was Micron Technology: 52,682 shares worth $60.8M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $108M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2026 buy was Micron Technology: 52,682 shares worth $60.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q2 2026, an estimated $146M increase.
- Simplex Trading's biggest Q2 2026 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $108M.
- Simplex Trading fully exited Intel in Q2 2026, selling an estimated $76.6M.
- Simplex Trading's ten largest holdings make up 50% of its $171B portfolio in Q2 2026.
- Simplex Trading opened 1,714 new positions and closed 1,487 in Q2 2026.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $171B.
Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.