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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
CALL
McDonald's
MCD
$187B
| $32.8M | 0.1% |
1,845
-1,276
| -41% | -$226K |
|
127
PUT
Lowe's Companies
LOW
$114B
| $32.7M | 0.1% |
3,537
+565
| +19% | +$54.5K |
|
128
CALL
Wells Fargo
WFC
$263B
| $32.6M | 0.1% |
7,085
+3,049
| +76% | +$156K |
|
129
CALL
CVS Health
CVS
$141B
| $32.5M | 0.1% |
4,966
+688
| +16% | +$51.4K |
|
|
CELG
130
CALL
DELISTED
Celgene Corp
CELG
| $32.4M | 0.1% |
5,059
+745
| +17% | +$55K |
|
131
PUT
PepsiCo
PEP
$185B
| $32.3M | 0.09% |
2,922
+1,546
| +112% | +$174K |
|
132
CALL
Pfizer
PFE
$143B
| $31.7M | 0.09% |
7,658
+3,924
| +105% | +$163K |
|
|
TFCF
133
PUT
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $31.7M | 0.09% |
6,588
+3,114
| +90% | +$147K |
|
134
CALL
Cisco
CSCO
$446B
| $31.7M | 0.09% |
7,305
+5,286
| +262% | +$242K |
|
135
PUT
ExxonMobil
XOM
$638B
| $30.9M | 0.09% |
4,531
-1,123
| -20% | -$88.1K |
|
136
PUT
SLB Ltd
SLB
$71.4B
| $30.7M | 0.09% |
8,515
+4,563
| +115% | +$225K |
|
137
CALL
AbbVie
ABBV
$453B
| $30.6M | 0.09% |
3,314
-1,048
| -24% | -$92.2K |
|
138
CALL
Chipotle Mexican Grill
CMG
$42.1B
| $30.2M | 0.09% |
34,950
-12,700
| -27% | -$115K |
|
|
TSRO
139
CALL
DELISTED
TESARO, Inc.
TSRO
| $30.1M | 0.09% |
4,060
+3,767
| +1,286% | +$181K |
|
140
PUT
FedEx
FDX
$76.2B
| $30.1M | 0.09% |
1,865
-233
| -11% | -$49.3K |
|
141
CALL
ProShares UltraShort Health Care
RXD
$3.35M
| $29.8M | 0.09% |
1,895
+172
| +10% | +$16.5K |
|
142
PUT
Biogen
BIIB
$29.8B
| $29.7M | 0.09% |
986
-396
| -29% | -$126K |
|
143
PUT
Electronic Arts
EA
$52.4B
| $29.4M | 0.09% |
3,727
-411
| -10% | -$37.7K |
|
144
CALL
Intel
INTC
$530B
| $29.2M | 0.09% |
6,230
+1,007
| +19% | +$47.1K |
|
145
CALL
Texas Instruments
TXN
$263B
| $29.2M | 0.09% |
3,087
+590
| +24% | +$57.1K |
|
146
PUT
Qualcomm
QCOM
$186B
| $29.1M | 0.09% |
5,107
-678
| -12% | -$41.2K |
|
|
AGN
147
CALL
DELISTED
Allergan plc
AGN
| $29M | 0.09% |
2,170
-658
| -23% | -$108K |
|
148
CALL
Blackrock
BLK
$162B
| $28.9M | 0.08% |
737
+200
| +37% | +$81.9K |
|
149
CALL
Verizon
VZ
$186B
| $28.8M | 0.08% |
5,119
+3,329
| +186% | +$189K |
|
150
PUT
Union Pacific
UNP
$174B
| $28.7M | 0.08% |
2,074
-920
| -31% | -$136K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.