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 | |
|---|---|---|---|---|---|---|
4026
Equinix
EQIX
$99.8B
| $417K | ﹤0.01% |
+506
| New | +$426K |
|
4027
CALL
Genius Sports
GENI
$1.93B
| $417K | ﹤0.01% |
73,200
+21,500
| +42% | +$138K |
|
|
BORR
4028
Borr Drilling
BORR
$1.19B
| $416K | ﹤0.01% |
60,820
-26,007
| -30% | -$170K |
|
|
CHX
4029
CALL
DELISTED
ChampionX
CHX
| $416K | ﹤0.01% |
11,600
-21,800
| -65% | -$652K |
|
4030
PUT
Future Fuel
FF
$204M
| $416K | ﹤0.01% |
51,800
+49,200
| +1,892% | +$302K |
|
4031
CALL
KB Financial Group
KB
$39.7B
| $416K | ﹤0.01% |
8,000
+1,300
| +19% | +$61.3K |
|
4032
Amkor Technology
AMKR
$10.8B
| $415K | ﹤0.01% |
12,886
-28,519
| -69% | -$904K |
|
4033
AvePoint
AVPT
$2.77B
| $415K | ﹤0.01% |
52,470
+4,933
| +10% | +$38.8K |
|
4034
Check Point Software Technologies
CHKP
$14.3B
| $415K | ﹤0.01% |
2,536
-81,033
| -97% | -$13M |
|
4035
CALL
SandRidge Energy
SD
$503M
| $415K | ﹤0.01% |
28,500
+4,700
| +20% | +$63.5K |
|
4036
CALL
SIGA Technologies
SIGA
$239M
| $415K | ﹤0.01% |
48,500
-30,600
| -39% | -$175K |
|
4037
SiriusXM
SIRI
$10.9B
| $415K | ﹤0.01% |
10,705
-3,240
| -23% | -$154K |
|
|
FOLD
4038
CALL
DELISTED
Amicus Therapeutics
FOLD
| $414K | ﹤0.01% |
35,200
-16,600
| -32% | -$212K |
|
|
JMIA
4039
Jumia Technologies
JMIA
$710M
| $414K | ﹤0.01% |
81,029
-40,751
| -33% | -$182K |
|
4040
PUT
Xylem
XYL
$28.4B
| $413K | ﹤0.01% |
3,200
-1,500
| -32% | -$181K |
|
4041
HNI Corp
HNI
$3.07B
| $412K | ﹤0.01% |
9,142
+3,350
| +58% | +$142K |
|
4042
GraniteShares ETF Trust GraniteShares 2x Long NVDA Daily ETF
NVDL
$3.04B
| $412K | ﹤0.01% |
+29,817
| New | +$289K |
|
4043
PUT
VinFast Auto
VFS
$7.04B
| $412K | ﹤0.01% |
83,000
-106,500
| -56% | -$598K |
|
4044
PUT
A.O. Smith
AOS
$8.5B
| $411K | ﹤0.01% |
4,600
+1,600
| +53% | +$132K |
|
4045
CALL
Phinia Inc
PHIN
$3.05B
| $411K | ﹤0.01% |
10,700
+8,100
| +312% | +$264K |
|
|
4046
CALL
VinFast Auto
VFS
$7.04B
| $411K | ﹤0.01% |
82,800
-233,900
| -74% | -$1.31M |
|
4047
CALL
Aquestive Therapeutics
AQST
$449M
| $410K | ﹤0.01% |
96,300
+87,100
| +947% | +$290K |
|
4048
PUT
CDW
CDW
$19.1B
| $409K | ﹤0.01% |
1,600
-2,200
| -58% | -$523K |
|
4049
CALL
RLX Technology
RLX
$2.37B
| $409K | ﹤0.01% |
213,300
-175,300
| -45% | -$335K |
|
4050
PUT
CubeSmart
CUBE
$9.62B
| $408K | ﹤0.01% |
157,700
+150,900
| +2,219% | +$6.69M |
|
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.