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 | |
|---|---|---|---|---|---|---|---|
|
TRLV
8151
Trulieve Cannabis Corp
TRLV
$2.1B
| $5.13K | ﹤0.01% |
+522
| New | +$5.03K |
2026 Q2
0 quarters
|
|
8152
CALL
Mobilicom Ltd
MOB
$38.2M
| $5.13K | ﹤0.01% |
+1,000
| New | +$5.86K |
2026 Q2
0 quarters
|
|
8153
PUT
Unisys
UIS
$177M
| $5.12K | ﹤0.01% |
+1,400
| New | +$4.39K |
2026 Q2
0 quarters
|
|
8154
Tradr 2X Long OPEN Daily ETF
OPEX
$2.19M
| $5.12K | ﹤0.01% |
+290
| New | +$6.03K |
2026 Q2
0 quarters
|
|
8155
Fidelity International Value Factor ETF
FIVA
$629M
| $5.12K | ﹤0.01% |
+133
| New | +$4.97K |
2026 Q2
0 quarters
|
|
8156
PUT
Cactus
WHD
$4.21B
| $5.12K | ﹤0.01% |
100
-200
| -67% | -$11.2K |
2025 Q2
4 quarters
|
|
8157
PUT
Crane NXT
CXT
$3.35B
| $5.12K | ﹤0.01% |
100
| – | – |
2026 Q1
1 quarter
|
|
8158
CALL
Magnolia Oil & Gas
MGY
$6.8B
| $5.12K | ﹤0.01% |
200
-4,500
| -96% | -$129K |
2025 Q1
5 quarters
|
|
8159
CALL
Origin Bancorp
OBK
$1.64B
| $5.12K | ﹤0.01% |
100
-100
| -50% | -$4.71K |
2025 Q4
2 quarters
|
|
8160
PUT
CNO Financial Group
CNO
$5.13B
| $5.1K | ﹤0.01% |
+100
| New | +$4.64K |
2026 Q2
0 quarters
|
|
8161
CALL
Neonode
NEON
$12.6M
| $5.08K | ﹤0.01% |
5,400
-58,600
| -92% | -$87K |
2021 Q4
18 quarters
|
|
8162
NCR Atleos
NATL
$3.49B
| $5.08K | ﹤0.01% |
117
-524
| -82% | -$23.2K |
2026 Q1
1 quarter
|
|
8163
Tradr 2X Long WULF Daily ETF
WULX
$7.39M
| $5.08K | ﹤0.01% |
+110
| New | +$4.87K |
2026 Q2
0 quarters
|
|
8164
PUT
Pacira BioSciences
PCRX
$1.45B
| $5.07K | ﹤0.01% |
200
| – | – |
2023 Q3
11 quarters
|
|
8165
TappAlpha S&P 500 Growth & Daily Income ETF
TSPY
$361M
| $5.06K | ﹤0.01% |
200
-3,051
| -94% | -$76.8K |
2026 Q1
1 quarter
|
|
8166
Pattern Group Inc
PTRN
$2.93B
| $5.06K | ﹤0.01% |
201
-1,835
| -90% | -$31.1K |
2025 Q4
2 quarters
|
|
8167
CALL
Seven Hills Realty Trust
SEVN
$140M
| $5.06K | ﹤0.01% |
600
| – | – |
2025 Q2
4 quarters
|
|
8168
PUT
MidCap Financial Investment
MFIC
$693M
| $5.04K | ﹤0.01% |
500
-1,400
| -74% | -$15.4K |
2026 Q1
1 quarter
|
|
8169
CALL
Riskified
RSKD
$1.18B
| $5.04K | ﹤0.01% |
1,000
-6,800
| -87% | -$31.7K |
2025 Q4
2 quarters
|
|
8170
Invesco S&P 500 Equal Weight Utilities ETF
RSPU
$522M
| $5.03K | ﹤0.01% |
+62
| New | +$4.98K |
2026 Q2
0 quarters
|
|
|
HUSE
8171
PUT
DELISTED
Strategy Shares US Market Rotation Strategy ETF
HUSE
| $5.03K | ﹤0.01% |
200
-200
| -50% | -$5.03K |
2026 Q1
1 quarter
|
|
8172
Amplify Lithium & Battery Technology ETF
BATT
$97.8M
| $5.01K | ﹤0.01% |
326
-6,594
| -95% | -$109K |
2025 Q3
3 quarters
|
|
8173
CALL
Permian Basin Royalty Trust
PBT
$1.55B
| $5.01K | ﹤0.01% |
200
-1,600
| -89% | -$40.5K |
2021 Q2
20 quarters
|
|
8174
PUT
KNOT Offshore Partners
KNOP
$347M
| $4.99K | ﹤0.01% |
+500
| New | +$5.31K |
2026 Q2
0 quarters
|
|
8175
CALL
VanEck Bitcoin Trust
HODL
$1.36B
| $4.98K | ﹤0.01% |
300
-2,500
| -89% | -$50.7K |
2025 Q4
2 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.