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 | |
|---|---|---|---|---|---|---|
1026
CALL
Gen Digital
GEN
$15.1B
| $3.55M | 0.01% |
1,390
-619
| -31% | -$15.1K |
|
1027
PUT
VeriSign
VRSN
$23.8B
| $3.54M | 0.01% |
184
-17
| -8% | -$3.19K |
|
|
DISCK
1028
CALL
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $3.54M | 0.01% |
1,127
+600
| +114% | +$16.8K |
|
|
DCP
1029
PUT
DELISTED
DCP Midstream, LP
DCP
| $3.53M | 0.01% |
1,443
+690
| +92% | +$16.2K |
|
|
FL
1030
PUT
DELISTED
Foot Locker
FL
| $3.53M | 0.01% |
906
-418
| -32% | -$17.6K |
|
1031
Novartis
NVS
$297B
| $3.53M | 0.01% |
+37,282
| New | +$3.35M |
|
|
HDS
1032
PUT
DELISTED
HD Supply Holdings, Inc.
HDS
| $3.53M | 0.01% |
877
+754
| +613% | +$30K |
|
1033
CALL
Yum China
YUMC
$14.8B
| $3.52M | 0.01% |
734
+141
| +24% | +$6.27K |
|
1034
PUT
Nutanix
NTNX
$14.2B
| $3.52M | 0.01% |
1,125
-518
| -32% | -$15.3K |
|
1035
PUT
American Electric Power
AEP
$73.4B
| $3.52M | 0.01% |
372
+52
| +16% | +$4.8K |
|
1036
CALL
Synchrony
SYF
$23.3B
| $3.51M | 0.01% |
976
+325
| +50% | +$11.6K |
|
|
GOOS
1037
PUT
Canada Goose Holdings
GOOS
$896M
| $3.51M | 0.01% |
969
+247
| +34% | +$9.53K |
|
|
CYBR
1038
PUT
DELISTED
CyberArk
CYBR
| $3.51M | 0.01% |
301
+29
| +11% | +$3.25K |
|
1039
CALL
Stryker
SYK
$122B
| $3.5M | 0.01% |
167
-75
| -31% | -$15.6K |
|
|
CLVS
1040
PUT
DELISTED
Clovis Oncology, Inc.
CLVS
| $3.5M | 0.01% |
3,357
+2,310
| +221% | +$16.8K |
|
1041
Atlassian
TEAM
$20.3B
| $3.49M | 0.01% |
29,033
+27,417
| +1,697% | +$3.34M |
|
1042
PUT
Paylocity
PCTY
$6.46B
| $3.49M | 0.01% |
289
+265
| +1,104% | +$29K |
|
1043
CALL
Zions Bancorporation
ZION
$10.1B
| $3.49M | 0.01% |
672
+182
| +37% | +$8.84K |
|
1044
CALL
Zimmer Biomet
ZBH
$17.3B
| $3.49M | 0.01% |
240
+119
| +98% | +$16.4K |
|
|
AYX
1045
PUT
DELISTED
Alteryx Inc
AYX
| $3.48M | 0.01% |
348
+61
| +21% | +$6.2K |
|
1046
CALL
Labcorp
LH
$23.9B
| $3.45M | 0.01% |
237
+150
| +172% | +$21.7K |
|
1047
PUT
Mid-America Apartment Communities
MAA
$15.5B
| $3.44M | 0.01% |
261
+132
| +102% | +$17.7K |
|
1048
PUT
United States Oil Fund
USO
$2.5B
| $3.44M | 0.01% |
335
-241
| -42% | -$22.9K |
|
1049
CALL
Oneok
OKE
$58.7B
| $3.43M | 0.01% |
453
-670
| -60% | -$47.9K |
|
|
VRNT
1050
PUT
DELISTED
Verint Systems
VRNT
| $3.43M | 0.01% |
1,215
+1,164
| +2,282% | +$28.4K |
|
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.