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 | |
|---|---|---|---|---|---|---|
2976
PUT
TC Energy
TRP
$71.2B
| $1.14M | ﹤0.01% |
28,400
+20,000
| +238% | +$789K |
|
2977
PUT
Powell Industries
POWL
$7.99B
| $1.14M | ﹤0.01% |
24,000
+15,000
| +167% | +$642K |
|
|
TIGR
2978
UP Fintech Holding
TIGR
$877M
| $1.14M | ﹤0.01% |
+330,997
| New | +$1.31M |
|
2979
CALL
Commault Systems
CVLT
$6.19B
| $1.14M | ﹤0.01% |
11,200
+4,600
| +70% | +$416K |
|
2980
CALL
Imperial Petroleum
IMPP
$217M
| $1.14M | ﹤0.01% |
363,100
+130,900
| +56% | +$407K |
|
2981
CALL
NiSource
NI
$22B
| $1.14M | ﹤0.01% |
41,100
-68,000
| -62% | -$1.79M |
|
2982
PUT
Qualys
QLYS
$4.75B
| $1.13M | ﹤0.01% |
6,800
+6,200
| +1,033% | +$1.09M |
|
2983
Entergy
ETR
$53.1B
| $1.13M | ﹤0.01% |
21,458
-15,138
| -41% | -$767K |
|
2984
Encompass Health
EHC
$11.3B
| $1.13M | ﹤0.01% |
+13,697
| New | +$1M |
|
2985
Edison International
EIX
$30.3B
| $1.13M | ﹤0.01% |
15,981
-11,786
| -42% | -$806K |
|
2986
PUT
FS KKR Capital
FSK
$3.04B
| $1.13M | ﹤0.01% |
59,300
-14,400
| -20% | -$285K |
|
2987
CALL
Blue Owl Capital
OBDC
$5.42B
| $1.13M | ﹤0.01% |
73,500
+21,200
| +41% | +$319K |
|
|
SPWR
2988
CALL
DELISTED
SunPower Corporation Common Stock
SPWR
| $1.13M | ﹤0.01% |
376,800
-543,300
| -59% | -$1.79M |
|
2989
Dutch Bros
BROS
$9.01B
| $1.13M | ﹤0.01% |
+34,188
| New | +$1.01M |
|
2990
PUT
CrossAmerica Partners
CAPL
$838M
| $1.13M | ﹤0.01% |
+49,500
| New | +$1.12M |
|
2991
PUT
NuScale Power
SMR
$2.96B
| $1.13M | ﹤0.01% |
212,500
+200,800
| +1,716% | +$720K |
|
2992
Equity Residential
EQR
$25.2B
| $1.13M | ﹤0.01% |
17,870
-1,819
| -9% | -$111K |
|
2993
Cardlytics
CDLX
$21.7M
| $1.13M | ﹤0.01% |
7,772
+6,983
| +885% | +$590K |
|
2994
CALL
Sterling Infrastructure
STRL
$19.5B
| $1.13M | ﹤0.01% |
10,200
-600
| -6% | -$54.5K |
|
2995
CALL
Lennox International
LII
$19B
| $1.12M | ﹤0.01% |
2,300
| – | – |
|
2996
PUT
Hess Midstream
HESM
$5.11B
| $1.12M | ﹤0.01% |
31,100
+16,600
| +114% | +$561K |
|
2997
CALL
DHT Holdings
DHT
$2.95B
| $1.12M | ﹤0.01% |
97,600
+83,600
| +597% | +$917K |
|
2998
PUT
SIGA Technologies
SIGA
$222M
| $1.12M | ﹤0.01% |
131,100
+15,100
| +13% | +$86.2K |
|
2999
CALL
Main Street Capital
MAIN
$5B
| $1.12M | ﹤0.01% |
23,700
+13,400
| +130% | +$606K |
|
3000
CALL
Service Corp International
SCI
$11.4B
| $1.12M | ﹤0.01% |
15,100
-1,300
| -8% | -$91.7K |
|
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.