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 | |
|---|---|---|---|---|---|---|
1101
Editas Medicine
EDIT
$419M
| $241K | 0.01% |
10,822
+4,036
| +59% | +$83.6K |
|
1102
CALL
Valero Energy
VLO
$90.6B
| $239K | 0.01% |
1,561
+643
| +70% | +$43K |
|
1103
PUT
Las Vegas Sands
LVS
$30.5B
| $238K | 0.01% |
3,291
+553
| +20% | +$30.1K |
|
1104
Open Text
OTEX
$5.22B
| $238K | 0.01% |
+7,007
| New | +$233K |
|
|
TWX
1105
PUT
DELISTED
Time Warner Inc
TWX
| $238K | 0.01% |
2,500
-160
| -6% | -$15.5K |
|
1106
CALL
Yum China
YUMC
$14.8B
| $237K | 0.01% |
+1,109
| New | +$29.7K |
|
|
FIT
1107
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $236K | 0.01% |
39,910
+5,463
| +16% | +$34.7K |
|
|
RTN
1108
CALL
DELISTED
Raytheon Company
RTN
| $236K | 0.01% |
318
-516
| -62% | -$77.6K |
|
|
S
1109
CALL
DELISTED
Sprint Corporation
S
| $236K | 0.01% |
1,942
+260
| +15% | +$2.27K |
|
|
SBNY
1110
DELISTED
Signature Bank
SBNY
| $236K | 0.01% |
+1,596
| New | +$247K |
|
1111
Cimpress
CMPR
$2.36B
| $235K | 0.01% |
+2,738
| New | +$237K |
|
1112
Kraft Heinz
KHC
$30.1B
| $235K | 0.01% |
+2,598
| New | +$234K |
|
|
AET
1113
CALL
DELISTED
Aetna Inc
AET
| $235K | 0.01% |
855
-217
| -20% | -$27.2K |
|
1114
PUT
Lowe's Companies
LOW
$113B
| $233K | 0.01% |
4,266
+2,349
| +123% | +$180K |
|
1115
PUT
Duke Energy
DUK
$101B
| $232K | 0.01% |
629
+77
| +14% | +$6.12K |
|
1116
Saic
SAIC
$4.93B
| $232K | 0.01% |
3,129
+2,836
| +968% | +$241K |
|
1117
CALL
Accenture
ACN
$84.9B
| $231K | 0.01% |
1,027
+310
| +43% | +$37K |
|
1118
PUT
Kimberly-Clark
KMB
$35.6B
| $231K | 0.01% |
961
+680
| +242% | +$85.8K |
|
1119
CALL
STMicroelectronics
STM
$47.7B
| $231K | 0.01% |
1,327
+1,216
| +1,095% | +$16.9K |
|
1120
PUT
Trip.com Group
TCOM
$27.1B
| $231K | 0.01% |
2,136
+615
| +40% | +$28.2K |
|
|
FLXN
1121
CALL
DELISTED
Flexion Therapeutics, Inc.
FLXN
| $231K | 0.01% |
509
+274
| +117% | +$5.59K |
|
|
DD
1122
CALL
DELISTED
Du Pont De Nemours E I
DD
| $230K | 0.01% |
440
-978
| -69% | -$75.9K |
|
|
ESPR
1123
PUT
DELISTED
Esperion Therapeutics
ESPR
| $229K | 0.01% |
+1,607
| New | +$36.8K |
|
|
NTRI
1124
DELISTED
NutriSystem, Inc.
NTRI
| $229K | 0.01% |
+4,130
| New | +$171K |
|
|
RTN
1125
PUT
DELISTED
Raytheon Company
RTN
| $228K | 0.01% |
1,444
-655
| -31% | -$98.5K |
|
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.