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 | |
|---|---|---|---|---|---|---|
|
MLNX
876
CALL
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $3.65M | 0.01% |
301
+9
| +3% | +$1.06K |
|
877
CALL
PENN Entertainment
PENN
$2.74B
| $3.65M | 0.01% |
2,883
+2,665
| +1,222% | +$67K |
|
|
SIVB
878
PUT
DELISTED
SVB Financial Group
SIVB
| $3.63M | 0.01% |
240
-43
| -15% | -$9.46K |
|
879
CALL
Canadian Solar
CSIQ
$1.01B
| $3.6M | 0.01% |
2,266
+742
| +49% | +$15K |
|
880
PUT
AstraZeneca
AZN
$261B
| $3.6M | 0.01% |
403
+12
| +3% | +$1.13K |
|
881
PUT
Incyte
INCY
$23.2B
| $3.6M | 0.01% |
491
-231
| -32% | -$17.4K |
|
882
CALL
Ambarella
AMBA
$3.03B
| $3.59M | 0.01% |
740
+61
| +9% | +$3.5K |
|
883
CALL
Carvana
CVNA
$43.5B
| $3.59M | 0.01% |
3,260
-1,965
| -38% | -$30.4K |
|
884
PUT
TransDigm Group
TDG
$67.7B
| $3.59M | 0.01% |
112
-442
| -80% | -$241K |
|
885
CALL
iShares Convertible Bond ETF
ICVT
$7.39B
| $3.57M | 0.01% |
1,510
-448
| -23% | -$27.7K |
|
886
PUT
Dell
DELL
$286B
| $3.57M | 0.01% |
1,782
-844
| -32% | -$19.5K |
|
|
887
PUT
Carvana
CVNA
$43.5B
| $3.57M | 0.01% |
3,240
-340
| -9% | -$5.26K |
|
|
VRNT
888
PUT
DELISTED
Verint Systems
VRNT
| $3.56M | 0.01% |
1,625
+410
| +34% | +$11K |
|
889
Moderna
MRNA
$22.8B
| $3.56M | 0.01% |
118,818
+86,366
| +266% | +$1.99M |
|
890
PUT
F5
FFIV
$22.2B
| $3.55M | 0.01% |
333
-252
| -43% | -$30.8K |
|
891
PUT
United Parks & Resorts
PRKS
$2.05B
| $3.55M | 0.01% |
3,222
+3,003
| +1,371% | +$82.2K |
|
892
CALL
Genuine Parts
GPC
$16.4B
| $3.55M | 0.01% |
527
+297
| +129% | +$26.4K |
|
|
MXIM
893
CALL
DELISTED
Maxim Integrated Products
MXIM
| $3.53M | 0.01% |
726
+516
| +246% | +$29.6K |
|
894
CALL
Yum! Brands
YUM
$40.7B
| $3.52M | 0.01% |
513
-776
| -60% | -$72.4K |
|
895
CALL
Bunge Global
BG
$23.8B
| $3.51M | 0.01% |
856
+425
| +99% | +$20.8K |
|
896
CALL
Ferrari
RACE
$63.2B
| $3.51M | 0.01% |
230
-171
| -43% | -$27.6K |
|
897
CALL
Inovio Pharmaceuticals
INO
$86.4M
| $3.51M | 0.01% |
393
+383
| +3,830% | +$23.6K |
|
|
MRSH
898
PUT
Marsh
MRSH
$83.8B
| $3.5M | 0.01% |
405
+401
| +10,025% | +$42.8K |
|
|
ZEN
899
PUT
DELISTED
ZENDESK INC
ZEN
| $3.5M | 0.01% |
547
-284
| -34% | -$22.2K |
|
900
CALL
Edwards Lifesciences
EW
$48.1B
| $3.49M | 0.01% |
555
-516
| -48% | -$37.2K |
|
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.