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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1026
CALL
Evergy
EVRG
$20B
| $2.81M | 0.01% |
511
-193
| -27% | -$12.7K |
|
1027
PUT
State Street
STT
$50.6B
| $2.81M | 0.01% |
528
-274
| -34% | -$19K |
|
1028
CALL
Pan American Silver
PAAS
$18.6B
| $2.81M | 0.01% |
2,126
-2,102
| -50% | -$43.7K |
|
1029
PUT
PVH
PVH
$3.59B
| $2.8M | ﹤0.01% |
745
+2
| +0.3% | +$153 |
|
1030
United States Oil Fund
USO
$2.5B
| $2.8M | ﹤0.01% |
+83,262
| New | +$6.41M |
|
1031
PUT
Tilray
TLRY
$493M
| $2.8M | ﹤0.01% |
407
+130
| +47% | +$18.2K |
|
1032
CALL
Iovance Biotherapeutics
IOVA
$2.29B
| $2.79M | ﹤0.01% |
934
+753
| +416% | +$20K |
|
1033
HSBC
HSBC
$349B
| $2.79M | ﹤0.01% |
99,531
+46,826
| +89% | +$1.63M |
|
1034
PUT
HDFC Bank
HDB
$119B
| $2.78M | ﹤0.01% |
1,448
+598
| +70% | +$16.1K |
|
1035
PUT
Guidewire Software
GWRE
$10.9B
| $2.78M | ﹤0.01% |
351
+302
| +616% | +$31.5K |
|
|
ATH
1036
PUT
DELISTED
Athene Holding Ltd. Class A Common Shares
ATH
| $2.78M | ﹤0.01% |
1,121
+601
| +116% | +$23.9K |
|
1037
PUT
Ralph Lauren
RL
$22.1B
| $2.78M | ﹤0.01% |
416
-425
| -51% | -$44.6K |
|
1038
CALL
Ametek
AME
$55.3B
| $2.78M | ﹤0.01% |
386
+280
| +264% | +$25.3K |
|
|
BLD
1039
PUT
DELISTED
TopBuild
BLD
| $2.77M | ﹤0.01% |
387
-1
| -0.3% | -$102 |
|
1040
PUT
Weibo
WB
$1.92B
| $2.77M | ﹤0.01% |
837
+133
| +19% | +$5.63K |
|
1041
CALL
ON Semiconductor
ON
$35.1B
| $2.77M | ﹤0.01% |
2,226
+1,481
| +199% | +$29K |
|
1042
CALL
TG Therapeutics
TGTX
$8.5B
| $2.77M | ﹤0.01% |
2,812
-19
| -0.7% | -$240 |
|
1043
CALL
Keysight
KEYS
$55.6B
| $2.76M | ﹤0.01% |
330
-95
| -22% | -$9.02K |
|
|
SCIU
1044
PUT
DELISTED
Global X Scientific Beta US ETF
SCIU
| $2.76M | ﹤0.01% |
1,281
+1,070
| +507% | +$35.2K |
|
|
CMA
1045
PUT
DELISTED
Comerica
CMA
| $2.75M | ﹤0.01% |
938
+304
| +48% | +$16.5K |
|
1046
PUT
Phillips 66
PSX
$83B
| $2.75M | ﹤0.01% |
513
+329
| +179% | +$26.8K |
|
1047
Cintas
CTAS
$81.3B
| $2.75M | ﹤0.01% |
+63,508
| New | +$4.15M |
|
|
XLRN
1048
CALL
DELISTED
Acceleron Pharma
XLRN
| $2.75M | ﹤0.01% |
306
+134
| +78% | +$10.4K |
|
1049
CALL
iQIYI
IQ
$1.17B
| $2.75M | ﹤0.01% |
1,544
-188
| -11% | -$4.22K |
|
|
LKFT
1050
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.84B
| $2.75M | ﹤0.01% |
14,011
+2,391
| +21% | +$514K |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.