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 |
Invesco QQQ Trust
QQQ
|
+$77.3M |
| 2 |
SPDR Gold Trust
GLD
|
+$73.2M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
+$38.5M |
| 4 |
Netflix
NFLX
|
+$38.4M |
| 5 |
NVIDIA
NVDA
|
+$36.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$55.9M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
+$28.3M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$23.1M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$23.1M |
| 5 |
Adobe
ADBE
|
+$22M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Consumer Discretionary | 0.47% |
| 3 | Communication Services | 0.34% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4101
CALL
Genpact
G
$5.87B
| $182K | ﹤0.01% |
50
-12
| -19% | -$406 |
|
|
SWIR
4102
PUT
DELISTED
Sierra Wireless
SWIR
| $182K | ﹤0.01% |
203
-20
| -9% | -$171 |
|
4103
Clean Harbors
CLH
$16B
| $181K | ﹤0.01% |
+3,028
| New | +$169K |
|
4104
CALL
Frontdoor
FTDR
$5.22B
| $181K | ﹤0.01% |
41
-69
| -63% | -$2.81K |
|
4105
CALL
Korn Ferry
KFY
$4.26B
| $181K | ﹤0.01% |
59
+40
| +211% | +$1.14K |
|
4106
Leggett & Platt
LEG
$1.47B
| $181K | ﹤0.01% |
5,174
-4,414
| -46% | -$137K |
|
|
MDLA
4107
CALL
DELISTED
Medallia, Inc.
MDLA
| $181K | ﹤0.01% |
+72
| New | +$1.72K |
|
4108
Gyre Therapeutics
GYRE
$668M
| $180K | ﹤0.01% |
4,101
-670
| -14% | -$31.5K |
|
4109
Virgin Galactic
SPCE
$320M
| $180K | ﹤0.01% |
553
-5,343
| -91% | -$1.76M |
|
4110
PUT
Upland Software
UPLD
$14.4M
| $180K | ﹤0.01% |
5
-22
| -81% | -$6.86K |
|
4111
CALL
Viasat
VSAT
$10.2B
| $180K | ﹤0.01% |
47
-390
| -89% | -$15.9K |
|
|
VVNT
4112
CALL
DELISTED
Vivint Smart Home, Inc. Class A Common Stock
VVNT
| $180K | ﹤0.01% |
+104
| New | +$1.3K |
|
4113
CALL
Gossamer Bio
GOSS
$100M
| $179K | ﹤0.01% |
138
+112
| +431% | +$1.41K |
|
4114
KALA BIO
KALA
$12.3M
| $179K | ﹤0.01% |
7
+3
| +75% | +$85K |
|
4115
PUT
Kura Oncology
KURA
$826M
| $179K | ﹤0.01% |
110
+87
| +378% | +$1.25K |
|
4116
PUT
MillerKnoll
MLKN
$1.61B
| $179K | ﹤0.01% |
76
+50
| +192% | +$1.13K |
|
4117
PUT
Paysign
PAYS
$510M
| $179K | ﹤0.01% |
185
-40
| -18% | -$295 |
|
4118
CALL
Acco Brands
ACCO
$401M
| $178K | ﹤0.01% |
252
+231
| +1,100% | +$1.44K |
|
|
4119
PUT
Korn Ferry
KFY
$4.26B
| $178K | ﹤0.01% |
58
+57
| +5,700% | +$1.63K |
|
|
EGRX
4120
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $178K | ﹤0.01% |
3,729
-18,528
| -83% | -$924K |
|
|
PTE
4121
CALL
DELISTED
PolarityTE, Inc. Common Stock
PTE
| $178K | ﹤0.01% |
58
+20
| +53% | +$532 |
|
|
CNXM
4122
CALL
DELISTED
CNX Midstream Partners LP
CNXM
| $178K | ﹤0.01% |
269
+64
| +31% | +$517 |
|
4123
CALL
Ascendis Pharma A/S
ASND
$16.7B
| $177K | ﹤0.01% |
12
-2
| -14% | -$275 |
|
4124
PUT
Chefs' Warehouse
CHEF
$4.09B
| $177K | ﹤0.01% |
131
-23
| -15% | -$318 |
|
4125
Core Laboratories
CLB
$493M
| $177K | ﹤0.01% |
8,733
+8,616
| +7,364% | +$154K |
|
Similar funds
Simplex Trading's Q2 2020 Portfolio in Review
As of Q2 2020, Simplex Trading held 8,917 positions worth $62.7B, up 11% from $56.7B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading's Q2 2020 filing shows 1,290 new, 3,427 increased, 2,723 reduced and 1,278 closed positions. Its largest new stake was iShares MSCI EAFE ETF: 665,841 shares worth $40.5M. The largest sale was Apple, an estimated $55.9M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2020 buy was iShares MSCI EAFE ETF: 665,841 shares worth $40.5M.
- Simplex Trading added most to Invesco QQQ Trust in Q2 2020, an estimated $77.3M increase.
- Simplex Trading's biggest Q2 2020 reduction was Apple, cutting an estimated $55.9M.
- Simplex Trading fully exited Adobe in Q2 2020, selling an estimated $22M.
- Simplex Trading's ten largest holdings make up 44% of its $62.7B portfolio in Q2 2020.
- Simplex Trading opened 1,290 new positions and closed 1,278 in Q2 2020.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $62.7B.
Based on Simplex Trading's 13F filing for Q2 2020, filed 13 Jul 2020.