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 | |
|---|---|---|---|---|---|---|
|
CVRR
2176
PUT
DELISTED
CVR Refining, LP
CVRR
| $529K | ﹤0.01% |
508
+432
| +568% | +$6.79K |
|
2177
PUT
Energizer
ENR
$1.44B
| $528K | ﹤0.01% |
117
+105
| +875% | +$5.58K |
|
2178
Microsoft
MSFT
$2.84T
| $528K | ﹤0.01% |
+5,200
| New | +$557K |
|
|
HEP
2179
CALL
DELISTED
Holly Energy Partners, L.P.
HEP
| $528K | ﹤0.01% |
185
-9
| -5% | -$266 |
|
|
COUP
2180
CALL
DELISTED
Coupa Software Incorporated
COUP
| $528K | ﹤0.01% |
84
-76
| -48% | -$4.81K |
|
2181
CALL
Genworth Financial
GNW
$3.8B
| $527K | ﹤0.01% |
1,131
+635
| +128% | +$2.74K |
|
|
ALXN
2182
DELISTED
Alexion Pharmaceuticals
ALXN
| $527K | ﹤0.01% |
5,423
-12,713
| -70% | -$1.5M |
|
|
SFLY
2183
PUT
DELISTED
Shutterfly, Inc.
SFLY
| $527K | ﹤0.01% |
131
-113
| -46% | -$5.93K |
|
2184
Autoliv
ALV
$8.6B
| $526K | ﹤0.01% |
7,499
+6,874
| +1,100% | +$558K |
|
2185
T. Rowe Price
TROW
$25B
| $526K | ﹤0.01% |
+5,704
| New | +$554K |
|
2186
CALL
Arrowhead Research
ARWR
$12.1B
| $525K | ﹤0.01% |
423
-1,097
| -72% | -$15K |
|
2187
CALL
AGNC Investment
AGNC
$12.3B
| $524K | ﹤0.01% |
299
-228
| -43% | -$4.06K |
|
2188
PUT
Exelon
EXC
$48.6B
| $523K | ﹤0.01% |
163
+108
| +196% | +$3.45K |
|
2189
A10 Networks
ATEN
$2.47B
| $522K | ﹤0.01% |
83,722
+58,996
| +239% | +$357K |
|
2190
PUT
Lamb Weston
LW
$6.82B
| $522K | ﹤0.01% |
71
-10
| -12% | -$766 |
|
2191
CALL
Annaly Capital Management
NLY
$16.9B
| $522K | ﹤0.01% |
133
+130
| +4,333% | +$5.2K |
|
|
PTE
2192
CALL
DELISTED
PolarityTE, Inc. Common Stock
PTE
| $522K | ﹤0.01% |
15
+4
| +36% | +$1.45K |
|
2193
PUT
Hexcel
HXL
$8.32B
| $521K | ﹤0.01% |
91
+60
| +194% | +$3.62K |
|
2194
PUT
Tennant Co
TNC
$1.5B
| $521K | ﹤0.01% |
100
+82
| +456% | +$5K |
|
|
QIWI
2195
PUT
DELISTED
QIWI PLC
QIWI
| $521K | ﹤0.01% |
369
-58
| -14% | -$782 |
|
|
RDS.B
2196
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $520K | ﹤0.01% |
8,680
-27,659
| -76% | -$1.77M |
|
2197
DexCom
DXCM
$27.6B
| $519K | ﹤0.01% |
17,344
-7,100
| -29% | -$225K |
|
|
AKRX
2198
CALL
DELISTED
Akorn Inc
AKRX
| $519K | ﹤0.01% |
1,531
-913
| -37% | -$5.43K |
|
2199
CALL
Snap
SNAP
$7.32B
| $517K | ﹤0.01% |
940
-639
| -40% | -$4.16K |
|
|
LSXMA
2200
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $517K | ﹤0.01% |
19,454
+11,607
| +148% | +$335K |
|
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.