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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4151
CALL
Cytosorbents Corp
CTSO
$22.2M
| $8K | ﹤0.01% |
172
+94
| +121% | +$525 |
|
4152
Camping World
CWH
$384M
| $8K | ﹤0.01% |
+277
| New | +$9.09K |
|
4153
CALL
Community Health Systems
CYH
$382M
| $8K | ﹤0.01% |
126
-382
| -75% | -$2.98K |
|
4154
CALL
Invesco DB Base Metals Fund
DBB
$306M
| $8K | ﹤0.01% |
114
-363
| -76% | -$5.85K |
|
4155
PUT
Enbridge
ENB
$120B
| $8K | ﹤0.01% |
489
-223
| -31% | -$9.42K |
|
4156
CALL
FS KKR Capital
FSK
$3.01B
| $8K | ﹤0.01% |
20
+13
| +186% | +$532 |
|
|
GTLS
4157
CALL
DELISTED
Chart Industries
GTLS
| $8K | ﹤0.01% |
96
+55
| +134% | +$2.04K |
|
4158
CALL
Harmonic Inc
HLIT
$1.15B
| $8K | ﹤0.01% |
32
-82
| -72% | -$450 |
|
|
PPLI
4159
PUT
People Inc
PPLI
$3.12B
| $8K | ﹤0.01% |
392
-319
| -45% | -$4.15K |
|
4160
Innodata
INOD
$1.81B
| $8K | ﹤0.01% |
3,916
+3,526
| +904% | +$7.6K |
|
4161
Identive
INVE
$61M
| $8K | ﹤0.01% |
+1,239
| New | +$6.1K |
|
4162
PUT
IQVIA
IQV
$40.7B
| $8K | ﹤0.01% |
363
+334
| +1,152% | +$26.1K |
|
4163
PUT
Ironwood Pharmaceuticals
IRWD
$586M
| $8K | ﹤0.01% |
+49
| New | +$670 |
|
|
JKS
4164
CALL
JinkoSolar
JKS
$764M
| $8K | ﹤0.01% |
102
+27
| +36% | +$428 |
|
4165
Keysight
KEYS
$50.7B
| $8K | ﹤0.01% |
222
-4,903
| -96% | -$183K |
|
4166
PUT
KLA
KLAC
$222B
| $8K | ﹤0.01% |
780
-140
| -15% | -$1.23K |
|
4167
CALL
Lazard
LAZ
$4B
| $8K | ﹤0.01% |
47
-253
| -84% | -$10.9K |
|
4168
PUT
LKQ Corp
LKQ
$6.72B
| $8K | ﹤0.01% |
177
+53
| +43% | +$1.65K |
|
|
LNW
4169
PUT
DELISTED
Light & Wonder
LNW
| $8K | ﹤0.01% |
597
+148
| +33% | +$2.86K |
|
4170
El Pollo Loco
LOCO
$503M
| $8K | ﹤0.01% |
+729
| New | +$8.94K |
|
4171
CALL
MBIA
MBI
$275M
| $8K | ﹤0.01% |
218
-290
| -57% | -$2.92K |
|
4172
PUT
Monarch Casino & Resort
MCRI
$2.2B
| $8K | ﹤0.01% |
+76
| New | +$1.97K |
|
|
MITT
4173
CALL
TPG Mortgage Investment Trust
MITT
$228M
| $8K | ﹤0.01% |
38
-6
| -14% | -$317 |
|
4174
PUT
Mettler-Toledo International
MTD
$28.1B
| $8K | ﹤0.01% |
33
+30
| +1,000% | +$13.7K |
|
4175
PUT
Matador Resources
MTDR
$6.04B
| $8K | ﹤0.01% |
190
+56
| +42% | +$1.4K |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.