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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3126
Getty Images
GETY
$173M
| $574K | ﹤0.01% |
112,958
+69,833
| +162% | +$388K |
|
3127
PUT
Biomea Fusion
BMEA
$91.1M
| $573K | ﹤0.01% |
+18,500
| New | +$230K |
|
3128
PUT
Newell Brands
NWL
$2.2B
| $573K | ﹤0.01% |
46,100
-5,300
| -10% | -$74.7K |
|
3129
CALL
Sonoco
SON
$5.8B
| $573K | ﹤0.01% |
9,400
+7,200
| +327% | +$427K |
|
3130
PUT
Coeur Mining
CDE
$15.8B
| $572K | ﹤0.01% |
143,600
+38,000
| +36% | +$132K |
|
3131
CALL
FTI Consulting
FCN
$4.88B
| $572K | ﹤0.01% |
2,900
+2,100
| +263% | +$365K |
|
3132
PUT
Expro Ltd
XPRO
$1.78B
| $572K | ﹤0.01% |
31,200
+28,100
| +906% | +$551K |
|
3133
CALL
Ameresco
AMRC
$1.12B
| $570K | ﹤0.01% |
11,600
+11,300
| +3,767% | +$599K |
|
3134
CALL
Cracker Barrel
CBRL
$1.17B
| $568K | ﹤0.01% |
5,000
-8,500
| -63% | -$929K |
|
|
ETRN
3135
PUT
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $568K | ﹤0.01% |
98,300
-8,600
| -8% | -$55.1K |
|
3136
Direxion Daily Junior Gold Miners Index Bear 2X ETF
JDST
$29.8M
| $567K | ﹤0.01% |
478
-509
| -52% | -$740K |
|
3137
CALL
Privia Health
PRVA
$3.11B
| $566K | ﹤0.01% |
20,500
+1,500
| +8% | +$39.6K |
|
3138
PUT
Western Midstream Partners
WES
$19.3B
| $566K | ﹤0.01% |
21,500
+13,600
| +172% | +$365K |
|
3139
PENN Entertainment
PENN
$2.83B
| $564K | ﹤0.01% |
+19,033
| New | +$590K |
|
3140
New Oriental
EDU
$7.94B
| $563K | ﹤0.01% |
14,595
+14,065
| +2,654% | +$568K |
|
|
SLCA
3141
PUT
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $563K | ﹤0.01% |
47,200
+24,800
| +111% | +$295K |
|
3142
PUT
Intellia Therapeutics
NTLA
$1.49B
| $562K | ﹤0.01% |
15,100
+12,600
| +504% | +$494K |
|
3143
PUT
Lightspeed Commerce
LSPD
$1.35B
| $561K | ﹤0.01% |
37,000
-14,600
| -28% | -$231K |
|
3144
Toyota
TM
$216B
| $560K | ﹤0.01% |
3,957
+951
| +32% | +$134K |
|
3145
Allogene Therapeutics
ALLO
$604M
| $559K | ﹤0.01% |
+113,349
| New | +$727K |
|
3146
CALL
Ginkgo Bioworks
DNA
$487M
| $559K | ﹤0.01% |
10,510
-6,515
| -38% | -$413K |
|
3147
CALL
Fiverr
FVRR
$398M
| $558K | ﹤0.01% |
16,000
-49,100
| -75% | -$1.79M |
|
|
CNH
3148
CNH Industrial
CNH
$13.7B
| $558K | ﹤0.01% |
+36,552
| New | +$592K |
|
3149
PUT
Artisan Partners
APAM
$2.86B
| $556K | ﹤0.01% |
17,400
+12,200
| +235% | +$409K |
|
3150
CALL
Roivant Sciences
ROIV
$25B
| $556K | ﹤0.01% |
75,400
-7,500
| -9% | -$61.8K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.