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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
JONE
2976
PUT
DELISTED
Jones Energy, Inc.
JONE
| $22K | ﹤0.01% |
41
+23
| +128% | +$1.86K |
|
|
CCP
2977
PUT
DELISTED
Care Capital Properties, Inc.
CCP
| $22K | ﹤0.01% |
106
+52
| +96% | +$1.3K |
|
|
VIIX
2978
DELISTED
VelocityShares VIX Short Term ETN
VIIX
| $22K | ﹤0.01% |
104
+100
| +2,500% | +$25.3K |
|
2979
CALL
Advanced Energy
AEIS
$12.2B
| $21K | ﹤0.01% |
42
-17
| -29% | -$871 |
|
2980
CALL
AMN Healthcare
AMN
$1.28B
| $21K | ﹤0.01% |
91
+4
| +5% | +$137 |
|
2981
CALL
Aptiv
APTV
$12B
| $21K | ﹤0.01% |
160
-293
| -65% | -$19.7K |
|
2982
CALL
Arrow Electronics
ARW
$10.9B
| $21K | ﹤0.01% |
89
-101
| -53% | -$6.68K |
|
2983
CALL
ASML
ASML
$675B
| $21K | ﹤0.01% |
20
-157
| -89% | -$16.4K |
|
2984
CALL
Axalta
AXTA
$7.01B
| $21K | ﹤0.01% |
409
+308
| +305% | +$8.11K |
|
2985
CALL
Banner Corp
BANR
$2.39B
| $21K | ﹤0.01% |
55
-15
| -21% | -$736 |
|
2986
CALL
Baxter International
BAX
$11.6B
| $21K | ﹤0.01% |
792
+628
| +383% | +$29K |
|
2987
CALL
Bank of Montreal
BMO
$125B
| $21K | ﹤0.01% |
171
+95
| +125% | +$6.34K |
|
2988
PUT
Cigna
CI
$76.6B
| $21K | ﹤0.01% |
148
-86
| -37% | -$11.3K |
|
2989
CALL
Core Laboratories
CLB
$538M
| $21K | ﹤0.01% |
57
+14
| +33% | +$1.55K |
|
2990
CALL
Canadian National Railway
CNI
$78.3B
| $21K | ﹤0.01% |
124
+40
| +48% | +$2.64K |
|
2991
CALL
Quest Diagnostics
DGX
$25.1B
| $21K | ﹤0.01% |
44
-92
| -68% | -$7.93K |
|
2992
CALL
Dynagas LNG Partners
DLNG
$131M
| $21K | ﹤0.01% |
296
+175
| +145% | +$2.63K |
|
2993
CALL
Element Solutions
ESI
$9.12B
| $21K | ﹤0.01% |
1,100
+530
| +93% | +$4.53K |
|
2994
CALL
Globalstar
GSAT
$10.2B
| $21K | ﹤0.01% |
107
+17
| +19% | +$266 |
|
|
HOLX
2995
CALL
DELISTED
Hologic
HOLX
| $21K | ﹤0.01% |
93
+81
| +675% | +$3.13K |
|
|
JKS
2996
JinkoSolar
JKS
$775M
| $21K | ﹤0.01% |
1,416
-4,592
| -76% | -$70.4K |
|
2997
CALL
Lumentum
LITE
$59.4B
| $21K | ﹤0.01% |
283
-38
| -12% | -$1.51K |
|
2998
Northern Oil and Gas
NOG
$2.3B
| $21K | ﹤0.01% |
784
+447
| +133% | +$10.6K |
|
2999
CALL
PetMed Express
PETS
$42.5M
| $21K | ﹤0.01% |
+129
| New | +$2.76K |
|
3000
CALL
Prospect Capital
PSEC
$1.06B
| $21K | ﹤0.01% |
228
-140
| -38% | -$1.12K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.