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 | |
|---|---|---|---|---|---|---|
6076
PUT
Genius Sports
GENI
$1.85B
| $61K | ﹤0.01% |
10,700
-16,300
| -60% | -$105K |
|
|
GIFI
6077
DELISTED
Gulf Island Fabrication
GIFI
| $61K | ﹤0.01% |
+8,373
| New | +$43.8K |
|
6078
PUT
GeoPark
GPRK
$633M
| $61K | ﹤0.01% |
6,400
-4,400
| -41% | -$39.1K |
|
6079
CALL
Hallador Energy
HNRG
$670M
| $61K | ﹤0.01% |
11,500
-11,200
| -49% | -$86.2K |
|
6080
Microvast
MVST
$269M
| $61K | ﹤0.01% |
73,067
-38,049
| -34% | -$34K |
|
6081
PUT
NewtekOne
NEWT
$428M
| $61K | ﹤0.01% |
+5,600
| New | +$66K |
|
|
NGD
6082
DELISTED
New Gold Inc
NGD
| $61K | ﹤0.01% |
35,936
-2,186
| -6% | -$2.98K |
|
6083
PUT
Praxis Precision Medicines
PRAX
$8.58B
| $61K | ﹤0.01% |
+1,000
| New | +$44.9K |
|
6084
PUT
Polestar Automotive Holding UK
PSNY
$2.09B
| $61K | ﹤0.01% |
1,340
-2,953
| -69% | -$160K |
|
6085
CALL
Sunstone Hotel Investors
SHO
$2.19B
| $61K | ﹤0.01% |
5,500
+400
| +8% | +$4.37K |
|
6086
PUT
Simpson Manufacturing
SSD
$7.72B
| $61K | ﹤0.01% |
+300
| New | +$58.1K |
|
6087
PUT
Timken Company
TKR
$9.56B
| $61K | ﹤0.01% |
700
-400
| -36% | -$33K |
|
|
VGR
6088
CALL
DELISTED
Vector Group Ltd.
VGR
| $61K | ﹤0.01% |
5,600
+4,000
| +250% | +$43.5K |
|
|
EVA
6089
DELISTED
Enviva Inc.
EVA
| $61K | ﹤0.01% |
139,605
+71,657
| +105% | +$37.6K |
|
6090
CALL
Capricor Therapeutics
CAPR
$223M
| $60K | ﹤0.01% |
8,900
-30,900
| -78% | -$149K |
|
6091
CALL
Digi International
DGII
$2.63B
| $60K | ﹤0.01% |
+1,900
| New | +$53.1K |
|
6092
PUT
Hippo Holdings
HIPO
$830M
| $60K | ﹤0.01% |
+3,300
| New | +$40.6K |
|
6093
Kopin
KOPN
$652M
| $60K | ﹤0.01% |
+33,812
| New | +$75.1K |
|
6094
CALL
Seres Therapeutics
MCRB
$46.8M
| $60K | ﹤0.01% |
3,885
+2,880
| +287% | +$62.1K |
|
6095
PUT
Mirion Technologies
MIR
$3.73B
| $60K | ﹤0.01% |
5,300
-89,300
| -94% | -$894K |
|
6096
CALL
MarketWise
MKTW
$52.5M
| $60K | ﹤0.01% |
+1,735
| New | +$73.6K |
|
6097
PUT
Utz Brands
UTZ
$1.25B
| $60K | ﹤0.01% |
3,300
+1,600
| +94% | +$28.5K |
|
6098
CALL
Vuzix
VUZI
$194M
| $60K | ﹤0.01% |
50,200
+25,600
| +104% | +$41.8K |
|
|
ACR
6099
CALL
ACRES Commercial Realty
ACR
$124M
| $59K | ﹤0.01% |
4,200
+3,900
| +1,300% | +$41.5K |
|
6100
PUT
Barings BDC
BBDC
$864M
| $59K | ﹤0.01% |
6,400
+5,500
| +611% | +$50.2K |
|
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.