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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CTO
7151
PUT
CTO Realty Growth
CTO
$756M
| $18K | ﹤0.01% |
1,100
+900
| +450% | +$15.1K |
|
7152
Cue Biopharma
CUE
$118M
| $18K | ﹤0.01% |
+318
| New | +$22.4K |
|
7153
PUT
Cushman & Wakefield Ltd
CWK
$3.16B
| $18K | ﹤0.01% |
1,800
-3,600
| -67% | -$36.4K |
|
7154
CALL
Dragonfly Energy
DFLI
$15.5M
| $18K | ﹤0.01% |
376
-903
| -71% | -$41.6K |
|
|
7155
Dragonfly Energy
DFLI
$15.5M
| $18K | ﹤0.01% |
382
+235
| +160% | +$10.8K |
|
7156
PUT
iShares Core Dividend ETF
DIVB
$1.71B
| $18K | ﹤0.01% |
400
-300
| -43% | -$12.6K |
|
7157
CALL
Envela
ELA
$551M
| $18K | ﹤0.01% |
4,100
+100
| +3% | +$444 |
|
7158
Epsilon Energy
EPSN
$168M
| $18K | ﹤0.01% |
+3,336
| New | +$16.6K |
|
7159
CALL
EverCommerce
EVCM
$2.14B
| $18K | ﹤0.01% |
+2,000
| New | +$19.5K |
|
7160
PUT
National Beverage
FIZZ
$3.06B
| $18K | ﹤0.01% |
400
-1,800
| -82% | -$88K |
|
7161
Full House Resorts
FLL
$83.4M
| $18K | ﹤0.01% |
3,385
-13,238
| -80% | -$65.5K |
|
7162
CALL
Fossil Group
FOSL
$260M
| $18K | ﹤0.01% |
+17,700
| New | +$19.7K |
|
7163
Galectin Therapeutics
GALT
$230M
| $18K | ﹤0.01% |
7,877
+917
| +13% | +$1.74K |
|
|
TDAY
7164
USA Today Co
TDAY
$1.29B
| $18K | ﹤0.01% |
7,507
-41,013
| -85% | -$92.2K |
|
7165
CALL
Grid Dynamics Holdings
GDYN
$569M
| $18K | ﹤0.01% |
+1,500
| New | +$19.6K |
|
7166
PUT
Gildan
GIL
$9.49B
| $18K | ﹤0.01% |
500
-1,700
| -77% | -$57.8K |
|
7167
Ingles Markets
IMKTA
$1.72B
| $18K | ﹤0.01% |
+244
| New | +$19.5K |
|
|
KREF
7168
PUT
KKR Real Estate Finance Trust
KREF
$466M
| $18K | ﹤0.01% |
1,800
-300
| -14% | -$3.29K |
|
7169
CALL
Lightwave Logic
LWLG
$823M
| $18K | ﹤0.01% |
3,900
-52,200
| -93% | -$227K |
|
7170
PUT
Main Street Capital
MAIN
$5.05B
| $18K | ﹤0.01% |
400
-2,900
| -88% | -$131K |
|
7171
CALL
Mistras Group
MG
$477M
| $18K | ﹤0.01% |
1,900
| – | – |
|
7172
PUT
Newmark Group
NMRK
$2.64B
| $18K | ﹤0.01% |
1,700
-1,500
| -47% | -$15.7K |
|
7173
OPAL Fuels
OPAL
$62.5M
| $18K | ﹤0.01% |
3,672
-243
| -6% | -$1.19K |
|
7174
CALL
OneSpaWorld
OSW
$2.64B
| $18K | ﹤0.01% |
+1,400
| New | +$18.9K |
|
7175
CALL
Pangaea Logistics
PANL
$484M
| $18K | ﹤0.01% |
2,700
-13,500
| -83% | -$111K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.