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 | |
|---|---|---|---|---|---|---|
1176
PUT
Inovio Pharmaceuticals
INO
$83.9M
| $2.3M | ﹤0.01% |
258
+242
| +1,513% | +$14.9K |
|
1177
CALL
Amdocs
DOX
$5.4B
| $2.3M | ﹤0.01% |
419
-103
| -20% | -$6.91K |
|
|
FRC
1178
PUT
DELISTED
First Republic Bank
FRC
| $2.3M | ﹤0.01% |
280
+191
| +215% | +$20.2K |
|
1179
Snap
SNAP
$7.42B
| $2.3M | ﹤0.01% |
193,530
+177,797
| +1,130% | +$2.73M |
|
1180
CALL
FirstEnergy
FE
$28.6B
| $2.3M | ﹤0.01% |
574
-115
| -17% | -$5.34K |
|
1181
iShares US Transportation ETF
IYT
$2.33B
| $2.3M | ﹤0.01% |
66,532
-6,952
| -9% | -$306K |
|
1182
PUT
Guardant Health
GH
$19.9B
| $2.3M | ﹤0.01% |
330
-194
| -37% | -$14.9K |
|
|
NUAN
1183
CALL
DELISTED
Nuance Communications, Inc.
NUAN
| $2.29M | ﹤0.01% |
1,379
-247
| -15% | -$4.83K |
|
|
1184
CALL
Guardant Health
GH
$19.9B
| $2.29M | ﹤0.01% |
329
-24
| -7% | -$1.84K |
|
|
FISV
1185
Fiserv Inc
FISV
$26.6B
| $2.29M | ﹤0.01% |
+24,058
| New | +$2.67M |
|
1186
CALL
Western Union
WU
$2.6B
| $2.28M | ﹤0.01% |
1,260
+671
| +114% | +$16.5K |
|
1187
Bilibili
BILI
$7.32B
| $2.27M | ﹤0.01% |
96,983
+38,696
| +66% | +$934K |
|
1188
CALL
Energy Transfer Partners
ET
$70.3B
| $2.27M | ﹤0.01% |
4,937
+2,152
| +77% | +$22.9K |
|
1189
CALL
Verisk Analytics
VRSK
$25.3B
| $2.27M | ﹤0.01% |
163
-273
| -63% | -$42.8K |
|
1190
PUT
Cinemark Holdings
CNK
$3.82B
| $2.27M | ﹤0.01% |
2,228
+2,184
| +4,964% | +$56K |
|
1191
Corpay
CPAY
$23.8B
| $2.27M | ﹤0.01% |
12,159
+7,222
| +146% | +$1.99M |
|
1192
PUT
AMN Healthcare
AMN
$1.28B
| $2.27M | ﹤0.01% |
392
+284
| +263% | +$19.4K |
|
1193
CALL
Wendy's
WEN
$1.37B
| $2.26M | ﹤0.01% |
1,521
+1,217
| +400% | +$23.9K |
|
1194
CALL
ICU Medical
ICUI
$3.84B
| $2.26M | ﹤0.01% |
112
+110
| +5,500% | +$21.2K |
|
1195
PUT
Papa John's
PZZA
$999M
| $2.25M | ﹤0.01% |
422
-149
| -26% | -$8.96K |
|
1196
PUT
Green Dot
GDOT
$743M
| $2.25M | ﹤0.01% |
885
+879
| +14,650% | +$25.3K |
|
1197
CALL
WEC Energy
WEC
$37.4B
| $2.25M | ﹤0.01% |
255
+40
| +19% | +$3.85K |
|
1198
CALL
Five Below
FIVE
$11.1B
| $2.25M | ﹤0.01% |
319
-618
| -66% | -$62.9K |
|
1199
CALL
Royal Gold
RGLD
$16.9B
| $2.25M | ﹤0.01% |
256
-136
| -35% | -$14K |
|
1200
Ross Stores
ROST
$74.5B
| $2.24M | ﹤0.01% |
+25,734
| New | +$2.75M |
|
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.