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 | |
|---|---|---|---|---|---|---|
2126
Nutrien
NTR
$32.7B
| $552K | ﹤0.01% |
+11,746
| New | +$613K |
|
2127
PUT
Snap-on
SNA
$20.9B
| $552K | ﹤0.01% |
38
-50
| -57% | -$7.91K |
|
|
CHL
2128
CALL
DELISTED
China Mobile Limited
CHL
| $552K | ﹤0.01% |
115
+32
| +39% | +$1.54K |
|
2129
CALL
BJ's Restaurants
BJRI
$1.41B
| $551K | ﹤0.01% |
109
-80
| -42% | -$4.83K |
|
2130
CALL
KB Home
KBH
$3.48B
| $548K | ﹤0.01% |
287
+16
| +6% | +$328 |
|
2131
PUT
Wolfspeed
WOLF
$1.2B
| $547K | ﹤0.01% |
128
-336
| -72% | -$13.6K |
|
2132
PUT
Carlyle Group
CG
$16.3B
| $546K | ﹤0.01% |
347
+269
| +345% | +$5.1K |
|
2133
CALL
Louisiana-Pacific
LPX
$5.2B
| $546K | ﹤0.01% |
246
+185
| +303% | +$4.19K |
|
2134
PUT
RPM International
RPM
$13.7B
| $546K | ﹤0.01% |
93
+44
| +90% | +$2.69K |
|
2135
SandRidge Energy
SD
$510M
| $546K | ﹤0.01% |
71,869
+45,217
| +170% | +$437K |
|
|
2136
PUT
SandRidge Energy
SD
$510M
| $546K | ﹤0.01% |
718
-120
| -14% | -$1.16K |
|
2137
CALL
Telecom Argentina
TEO
$5.89B
| $546K | ﹤0.01% |
351
+341
| +3,410% | +$5.84K |
|
|
EFOR
2138
CALL
Everforth Inc
EFOR
$845M
| $545K | ﹤0.01% |
100
-164
| -62% | -$10.7K |
|
2139
CALL
Franklin Resources
BEN
$16.9B
| $545K | ﹤0.01% |
184
+168
| +1,050% | +$5.17K |
|
|
SNBR
2140
CALL
DELISTED
Sleep Number
SNBR
| $545K | ﹤0.01% |
172
+140
| +438% | +$4.97K |
|
2141
PUT
Apollo Global Management
APO
$70.7B
| $544K | ﹤0.01% |
222
+3
| +1% | +$86 |
|
2142
CALL
Banco Bilbao Vizcaya Argentaria
BBVA
$144B
| $543K | ﹤0.01% |
1,027
+16
| +2% | +$90 |
|
|
FTCH
2143
CALL
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $543K | ﹤0.01% |
+307
| New | +$6.65K |
|
|
NBEV
2144
CALL
DELISTED
NewAge, Inc. Common Stock (Delaware)
NBEV
| $542K | ﹤0.01% |
1,044
+551
| +112% | +$2.89K |
|
2145
CALL
AAR Corp
AIR
$5.15B
| $541K | ﹤0.01% |
145
-24
| -14% | -$1.05K |
|
2146
OSI Systems
OSIS
$3.57B
| $541K | ﹤0.01% |
7,384
+5,976
| +424% | +$431K |
|
2147
PUT
Simpson Manufacturing
SSD
$7.98B
| $541K | ﹤0.01% |
+100
| New | +$5.87K |
|
2148
PUT
Brookfield
BN
$102B
| $540K | ﹤0.01% |
395
+361
| +1,062% | +$5.39K |
|
2149
CALL
Chemed
CHE
$6.78B
| $538K | ﹤0.01% |
+19
| New | +$5.73K |
|
2150
Invesco Solar ETF
TAN
$1.47B
| $538K | ﹤0.01% |
+29,039
| New | +$573K |
|
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.