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 | |
|---|---|---|---|---|---|---|
1901
CALL
Coherent
COHR
$55.2B
| $733K | ﹤0.01% |
226
+23
| +11% | +$858 |
|
1902
CALL
Teucrium Soybean Fund
SOYB
$57.2M
| $732K | ﹤0.01% |
1,143
-71
| -6% | -$1.15K |
|
|
PPL
1903
PUT
PPL Corp
PPL
$27.3B
| $730K | ﹤0.01% |
258
+214
| +486% | +$6.5K |
|
|
CIT
1904
CALL
DELISTED
CIT Group Inc.
CIT
| $730K | ﹤0.01% |
191
+64
| +50% | +$2.9K |
|
1905
CALL
Waste Management
WM
$95.9B
| $729K | ﹤0.01% |
82
-544
| -87% | -$48.8K |
|
1906
PUT
Peabody Energy
BTU
$2.78B
| $722K | ﹤0.01% |
237
-88
| -27% | -$2.95K |
|
1907
PUT
Madison Square Garden
MSGS
$9.54B
| $722K | ﹤0.01% |
38
-108
| -74% | -$21K |
|
1908
PUT
Radware
RDWR
$1.24B
| $719K | ﹤0.01% |
317
-985
| -76% | -$22.7K |
|
1909
Dover
DOV
$27.2B
| $718K | ﹤0.01% |
10,127
+9,359
| +1,219% | +$764K |
|
1910
CALL
Fluor
FLR
$7.29B
| $718K | ﹤0.01% |
223
-290
| -57% | -$12.5K |
|
1911
CALL
Public Service Enterprise Group
PEG
$39.8B
| $718K | ﹤0.01% |
138
-23
| -14% | -$1.24K |
|
1912
PUT
Equifax
EFX
$20.3B
| $717K | ﹤0.01% |
77
+21
| +38% | +$2.23K |
|
|
GG
1913
DELISTED
Goldcorp Inc
GG
| $717K | ﹤0.01% |
73,226
+49,087
| +203% | +$476K |
|
1914
CALL
Old Dominion Freight Line
ODFL
$48.5B
| $716K | ﹤0.01% |
174
+87
| +100% | +$3.85K |
|
|
CASA
1915
CALL
DELISTED
Casa Systems, Inc. Common Stock
CASA
| $716K | ﹤0.01% |
546
+230
| +73% | +$3.3K |
|
1916
PUT
Ericsson
ERIC
$30.7B
| $715K | ﹤0.01% |
807
+751
| +1,341% | +$6.53K |
|
|
CSFL
1917
PUT
DELISTED
CenterState Bank Corporation Common Stock
CSFL
| $715K | ﹤0.01% |
+340
| New | +$8.24K |
|
1918
Deutsche Bank
DB
$66.3B
| $713K | ﹤0.01% |
+87,602
| New | +$855K |
|
1919
CALL
BlackBerry
BB
$5.01B
| $712K | ﹤0.01% |
1,002
-173
| -15% | -$1.52K |
|
|
MLNX
1920
PUT
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $711K | ﹤0.01% |
77
-76
| -50% | -$6.46K |
|
1921
Ollie's Bargain Outlet
OLLI
$4.01B
| $709K | ﹤0.01% |
+10,661
| New | +$887K |
|
1922
CALL
IQVIA
IQV
$34.7B
| $708K | ﹤0.01% |
61
+37
| +154% | +$4.48K |
|
1923
Puma Biotechnology
PBYI
$406M
| $706K | ﹤0.01% |
34,716
+28,084
| +423% | +$843K |
|
1924
Boston Properties
BXP
$11B
| $705K | ﹤0.01% |
6,265
+4,727
| +307% | +$572K |
|
1925
Zoetis
ZTS
$31.6B
| $705K | ﹤0.01% |
8,246
-1,386
| -14% | -$125K |
|
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.