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 | |
|---|---|---|---|---|---|---|
4151
PUT
Black Stone Minerals
BSM
$3.14B
| $373K | ﹤0.01% |
23,400
-1,400
| -6% | -$22.2K |
|
4152
CALL
Sana Biotechnology
SANA
$882M
| $373K | ﹤0.01% |
+37,300
| New | +$279K |
|
4153
PUT
CareTrust REIT
CTRE
$10B
| $372K | ﹤0.01% |
15,300
+13,700
| +856% | +$309K |
|
4154
Fortuna Silver Mines
FSM
$2.54B
| $372K | ﹤0.01% |
99,811
-109,386
| -52% | -$350K |
|
|
PBPB
4155
CALL
DELISTED
Potbelly
PBPB
| $372K | ﹤0.01% |
30,800
+10,400
| +51% | +$130K |
|
4156
PUT
Huazhu Hotels Group
HTHT
$13.3B
| $371K | ﹤0.01% |
9,600
+7,600
| +380% | +$265K |
|
4157
Qiagen
QGEN
$8.62B
| $371K | ﹤0.01% |
8,397
+25
| +0.3% | +$1.14K |
|
4158
SPS Commerce
SPSC
$2.55B
| $371K | ﹤0.01% |
+2,010
| New | +$371K |
|
4159
PUT
Douglas Emmett
DEI
$2.05B
| $370K | ﹤0.01% |
26,700
-82,900
| -76% | -$1.13M |
|
4160
CALL
Liberty Energy
LBRT
$2.79B
| $370K | ﹤0.01% |
17,900
+1,700
| +10% | +$33.6K |
|
4161
CALL
Vicor
VICR
$8.33B
| $370K | ﹤0.01% |
9,700
+2,700
| +39% | +$105K |
|
|
TELL
4162
PUT
DELISTED
Tellurian Inc.
TELL
| $370K | ﹤0.01% |
560,800
+377,500
| +206% | +$256K |
|
4163
Ionis Pharmaceuticals
IONS
$8.93B
| $369K | ﹤0.01% |
8,530
-1,015
| -11% | -$48.4K |
|
|
OPRA
4164
PUT
Opera Ltd
OPRA
$1.68B
| $369K | ﹤0.01% |
23,400
+15,000
| +179% | +$189K |
|
|
DSKE
4165
DELISTED
Daseke, Inc. Common Stock
DSKE
| $369K | ﹤0.01% |
+44,480
| New | +$364K |
|
4166
CALL
Coeur Mining
CDE
$15.1B
| $368K | ﹤0.01% |
97,700
-45,800
| -32% | -$132K |
|
|
MODV
4167
PUT
DELISTED
ModivCare
MODV
| $368K | ﹤0.01% |
15,700
+14,400
| +1,108% | +$528K |
|
|
GRTS
4168
CALL
DELISTED
Gritstone bio, Inc. Common Stock
GRTS
| $368K | ﹤0.01% |
143,500
+62,200
| +77% | +$152K |
|
4169
PUT
Repligen
RGEN
$6.91B
| $367K | ﹤0.01% |
2,000
-10,100
| -83% | -$1.92M |
|
4170
Incyte
INCY
$25.4B
| $366K | ﹤0.01% |
+6,430
| New | +$386K |
|
4171
CALL
ING
ING
$92.9B
| $366K | ﹤0.01% |
22,200
-45,400
| -67% | -$648K |
|
4172
CALL
Newell Brands
NWL
$2.21B
| $366K | ﹤0.01% |
45,700
-395,100
| -90% | -$3.15M |
|
4173
PUT
Blue Owl Capital
OBDC
$5.35B
| $366K | ﹤0.01% |
23,800
+8,000
| +51% | +$120K |
|
4174
CALL
EPR Properties
EPR
$4.89B
| $365K | ﹤0.01% |
8,600
-7,900
| -48% | -$344K |
|
4175
PUT
EverQuote
EVER
$949M
| $365K | ﹤0.01% |
+19,700
| New | +$289K |
|
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.