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 | |
|---|---|---|---|---|---|---|
1301
PUT
Cleveland-Cliffs
CLF
$6.81B
| $1.48M | ﹤0.01% |
1,929
+1,413
| +274% | +$14.1K |
|
1302
PUT
Immersion
IMMR
$216M
| $1.48M | ﹤0.01% |
1,651
+1,268
| +331% | +$11.9K |
|
1303
CALL
Ares Capital
ARCC
$13.5B
| $1.48M | ﹤0.01% |
949
+872
| +1,132% | +$14.4K |
|
1304
Blackstone
BX
$104B
| $1.48M | ﹤0.01% |
+49,582
| New | +$1.64M |
|
|
CLVS
1305
DELISTED
Clovis Oncology, Inc.
CLVS
| $1.48M | ﹤0.01% |
82,311
+47,984
| +140% | +$980K |
|
1306
PUT
United States Brent Oil Fund
BNO
$815M
| $1.48M | ﹤0.01% |
964
+960
| +24,000% | +$18.7K |
|
|
ATH
1307
PUT
DELISTED
Athene Holding Ltd. Class A Common Shares
ATH
| $1.48M | ﹤0.01% |
371
-194
| -34% | -$8.73K |
|
|
ETFC
1308
DELISTED
E*Trade Financial Corporation
ETFC
| $1.48M | ﹤0.01% |
33,677
-30,086
| -47% | -$1.47M |
|
1309
CALL
Penske Automotive Group
PAG
$14.3B
| $1.47M | ﹤0.01% |
365
+209
| +134% | +$9.04K |
|
1310
CALL
Ally Financial
ALLY
$13.1B
| $1.47M | ﹤0.01% |
649
-19
| -3% | -$475 |
|
1311
Mohawk Industries
MHK
$6.9B
| $1.47M | ﹤0.01% |
12,571
+10,744
| +588% | +$1.43M |
|
1312
Texas Capital Bancshares
TCBI
$4.31B
| $1.47M | ﹤0.01% |
28,777
+26,819
| +1,370% | +$1.69M |
|
1313
PUT
Bilibili
BILI
$7.18B
| $1.47M | ﹤0.01% |
1,007
+396
| +65% | +$5.55K |
|
1314
CALL
Delek US
DK
$3.87B
| $1.47M | ﹤0.01% |
452
+161
| +55% | +$6.09K |
|
|
EBIX
1315
PUT
DELISTED
Ebix Inc
EBIX
| $1.46M | ﹤0.01% |
344
-54
| -14% | -$2.88K |
|
1316
CALL
Herbalife
HLF
$1.23B
| $1.46M | ﹤0.01% |
248
+74
| +43% | +$4.08K |
|
|
MOMO
1317
CALL
Hello Group
MOMO
$869M
| $1.46M | ﹤0.01% |
615
+247
| +67% | +$7.77K |
|
1318
iShares MSCI Europe Financials ETF
EUFN
$3.87B
| $1.46M | ﹤0.01% |
86,123
+72,622
| +538% | +$1.34M |
|
1319
CALL
Match Group
MTCH
$8.84B
| $1.46M | ﹤0.01% |
341
+41
| +14% | +$1.89K |
|
|
PPLI
1320
People Inc
PPLI
$3.1B
| $1.46M | ﹤0.01% |
44,511
-17,693
| -28% | -$594K |
|
1321
iShares US Aerospace & Defense ETF
ITA
$14.2B
| $1.45M | ﹤0.01% |
+16,834
| New | +$1.62M |
|
|
ROCC
1322
CALL
DELISTED
Ranger Oil Corporation Class A Common Stock
ROCC
| $1.45M | ﹤0.01% |
269
| – | – |
|
1323
CALL
Atlassian
TEAM
$22B
| $1.45M | ﹤0.01% |
163
-163
| -50% | -$12.9K |
|
1324
CALL
Sempra
SRE
$60.8B
| $1.45M | ﹤0.01% |
268
+214
| +396% | +$12.2K |
|
1325
PUT
Cintas
CTAS
$82.4B
| $1.44M | ﹤0.01% |
344
-1,552
| -82% | -$69.4K |
|
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.