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 | |
|---|---|---|---|---|---|---|
1051
CALL
Caesars Entertainment
CZR
$6.09B
| $2.74M | ﹤0.01% |
1,904
+1,481
| +350% | +$69.3K |
|
1052
CALL
STMicroelectronics
STM
$47.7B
| $2.74M | ﹤0.01% |
1,281
-234
| -15% | -$6.17K |
|
1053
MongoDB
MDB
$24.1B
| $2.73M | ﹤0.01% |
+20,010
| New | +$2.95M |
|
1054
CALL
Apollo Global Management
APO
$68.6B
| $2.73M | ﹤0.01% |
815
+370
| +83% | +$15.9K |
|
1055
CALL
Planet Fitness
PLNT
$4.29B
| $2.72M | ﹤0.01% |
559
+394
| +239% | +$27.5K |
|
1056
PUT
KLA
KLAC
$286B
| $2.72M | ﹤0.01% |
1,890
-5,460
| -74% | -$87.9K |
|
1057
PUT
Melco Resorts & Entertainment
MLCO
$2.16B
| $2.71M | ﹤0.01% |
2,187
+1,910
| +690% | +$36.5K |
|
1058
ProShares UltraPro Short QQQ
SQQQ
$2.14B
| $2.71M | ﹤0.01% |
223
+163
| +272% | +$2.14M |
|
|
FITB
1059
PUT
Fifth Third Bancorp
FITB
$51.8B
| $2.7M | ﹤0.01% |
1,821
+1,721
| +1,721% | +$42.9K |
|
1060
CALL
HCA Healthcare
HCA
$83.5B
| $2.7M | ﹤0.01% |
301
-220
| -42% | -$28.5K |
|
1061
PUT
Mettler-Toledo International
MTD
$26.9B
| $2.69M | ﹤0.01% |
39
-84
| -68% | -$62.7K |
|
|
SKX
1062
CALL
DELISTED
Skechers
SKX
| $2.68M | ﹤0.01% |
1,131
+20
| +2% | +$690 |
|
1063
PUT
Aptiv
APTV
$11.9B
| $2.68M | ﹤0.01% |
545
+108
| +25% | +$8.47K |
|
|
TECD
1064
PUT
DELISTED
Tech Data Corp
TECD
| $2.68M | ﹤0.01% |
205
+124
| +153% | +$17.2K |
|
|
MLNX
1065
PUT
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $2.68M | ﹤0.01% |
221
-326
| -60% | -$38.3K |
|
1066
CALL
Axalta
AXTA
$6.78B
| $2.68M | ﹤0.01% |
1,552
-298
| -16% | -$7.62K |
|
1067
CALL
Equifax
EFX
$19.6B
| $2.67M | ﹤0.01% |
224
-61
| -21% | -$8.87K |
|
1068
Microchip Technology
MCHP
$44.2B
| $2.67M | ﹤0.01% |
78,892
+4,032
| +5% | +$190K |
|
|
CZR
1069
PUT
DELISTED
Caesars Entertainment Corporation
CZR
| $2.67M | ﹤0.01% |
3,952
+3,511
| +796% | +$41.3K |
|
1070
CALL
Cheniere Energy
LNG
$57B
| $2.67M | ﹤0.01% |
797
-959
| -55% | -$49.1K |
|
1071
CALL
Omnicom Group
OMC
$22.2B
| $2.67M | ﹤0.01% |
486
-228
| -32% | -$16.2K |
|
1072
CALL
Perrigo
PRGO
$1.4B
| $2.66M | ﹤0.01% |
554
+166
| +43% | +$8.9K |
|
|
NBIS
1073
CALL
Nebius Group N.V.
NBIS
$56.1B
| $2.66M | ﹤0.01% |
782
+95
| +14% | +$3.92K |
|
|
WWE
1074
CALL
DELISTED
World Wrestling Entertainment
WWE
| $2.65M | ﹤0.01% |
782
-137
| -15% | -$6.64K |
|
1075
CALL
Valero Energy
VLO
$90.6B
| $2.65M | ﹤0.01% |
584
-615
| -51% | -$44.7K |
|
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.