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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CLDR
1051
CALL
DELISTED
Cloudera, Inc.
CLDR
| $3.42M | 0.01% |
2,943
+1,600
| +119% | +$15.3K |
|
|
MLNX
1052
CALL
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $3.42M | 0.01% |
292
+47
| +19% | +$5.34K |
|
1053
PUT
Verisk Analytics
VRSK
$25.3B
| $3.42M | 0.01% |
229
-319
| -58% | -$47.3K |
|
1054
CALL
Polaris
PII
$4.13B
| $3.42M | 0.01% |
336
+275
| +451% | +$26.7K |
|
1055
PUT
Akamai
AKAM
$17.1B
| $3.41M | 0.01% |
395
+307
| +349% | +$26.8K |
|
1056
PUT
Extra Space Storage
EXR
$30.7B
| $3.41M | 0.01% |
323
-35
| -10% | -$3.82K |
|
1057
PUT
Pan American Silver
PAAS
$18.6B
| $3.41M | 0.01% |
1,440
+158
| +12% | +$2.93K |
|
1058
CALL
Hormel Foods
HRL
$13.8B
| $3.4M | 0.01% |
755
+360
| +91% | +$15.5K |
|
1059
CALL
Kinsale Capital Group
KNSL
$7.66B
| $3.4M | 0.01% |
335
+236
| +238% | +$23.5K |
|
1060
Coca-Cola
KO
$349B
| $3.39M | 0.01% |
+61,302
| New | +$3.3M |
|
|
REGI
1061
PUT
DELISTED
Renewable Energy Group, Inc.
REGI
| $3.39M | 0.01% |
1,259
+1,010
| +406% | +$18.3K |
|
1062
CALL
Enphase Energy
ENPH
$5.13B
| $3.39M | 0.01% |
1,298
-1,094
| -46% | -$24.9K |
|
|
INFO
1063
CALL
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $3.39M | 0.01% |
450
+368
| +449% | +$26.2K |
|
1064
CALL
Jabil
JBL
$33.7B
| $3.38M | 0.01% |
817
-71
| -8% | -$2.73K |
|
|
RP
1065
CALL
DELISTED
RealPage, Inc.
RP
| $3.37M | 0.01% |
627
+269
| +75% | +$15.3K |
|
1066
CALL
Canadian Solar
CSIQ
$997M
| $3.37M | 0.01% |
1,524
+152
| +11% | +$2.75K |
|
|
DFS
1067
PUT
DELISTED
Discover Financial Services
DFS
| $3.37M | 0.01% |
397
+123
| +45% | +$10.1K |
|
1068
PUT
Aurinia Pharmaceuticals
AUPH
$1.96B
| $3.36M | 0.01% |
1,660
+1,042
| +169% | +$9.6K |
|
1069
PUT
Credit Acceptance
CACC
$6.2B
| $3.36M | 0.01% |
76
-124
| -62% | -$54.6K |
|
1070
Best Buy
BBY
$17.8B
| $3.36M | 0.01% |
+38,273
| New | +$2.93M |
|
1071
Dollar Tree
DLTR
$22.6B
| $3.36M | 0.01% |
35,698
-2,389
| -6% | -$251K |
|
1072
CALL
FirstEnergy
FE
$28.6B
| $3.35M | 0.01% |
689
+377
| +121% | +$18K |
|
1073
CALL
Viatris
VTRS
$20.1B
| $3.34M | 0.01% |
1,664
-124
| -7% | -$2.31K |
|
1074
CALL
Phillips 66
PSX
$83B
| $3.34M | 0.01% |
300
-433
| -59% | -$48.6K |
|
|
HTZ
1075
PUT
DELISTED
Hertz Global Holdings, Inc.
HTZ
| $3.33M | 0.01% |
2,118
+1,039
| +96% | +$15.6K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.