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 | |
|---|---|---|---|---|---|---|
1751
PUT
Equifax
EFX
$20.3B
| $1.51M | ﹤0.01% |
88
-182
| -67% | -$27K |
|
1752
CALL
MillerKnoll
MLKN
$1.5B
| $1.51M | ﹤0.01% |
640
+579
| +949% | +$13.1K |
|
1753
PUT
Owens Corning
OC
$11.5B
| $1.51M | ﹤0.01% |
271
+211
| +352% | +$9.84K |
|
|
AXON
1754
Axon Enterprise
AXON
$40.5B
| $1.51M | ﹤0.01% |
15,377
+4,367
| +40% | +$353K |
|
1755
CALL
Allison Transmission
ALSN
$10.1B
| $1.51M | ﹤0.01% |
410
+26
| +7% | +$931 |
|
1756
CALL
Elanco Animal Health
ELAN
$12.4B
| $1.5M | ﹤0.01% |
701
+55
| +9% | +$1.22K |
|
1757
CALL
McKesson
MCK
$98.5B
| $1.5M | ﹤0.01% |
98
-539
| -85% | -$77.8K |
|
1758
CALL
Targa Resources
TRGP
$60.4B
| $1.5M | ﹤0.01% |
749
+409
| +120% | +$6.15K |
|
1759
PUT
Aflac
AFL
$63.9B
| $1.5M | ﹤0.01% |
415
+87
| +27% | +$3.14K |
|
1760
PUT
Stride
LRN
$3.69B
| $1.5M | ﹤0.01% |
549
-204
| -27% | -$4.91K |
|
1761
PUT
Aurinia Pharmaceuticals
AUPH
$1.97B
| $1.49M | ﹤0.01% |
917
-831
| -48% | -$13.3K |
|
1762
iShares MSCI Germany ETF
EWG
$1.5B
| $1.49M | ﹤0.01% |
54,984
-13,230
| -19% | -$325K |
|
1763
CALL
Sensata Technologies
ST
$6.65B
| $1.49M | ﹤0.01% |
400
+109
| +37% | +$3.85K |
|
|
NEWR
1764
CALL
DELISTED
New Relic, Inc.
NEWR
| $1.49M | ﹤0.01% |
216
+1
| +0.5% | +$60 |
|
1765
PUT
Macerich
MAC
$7.32B
| $1.48M | ﹤0.01% |
1,653
+594
| +56% | +$4.6K |
|
1766
PUT
Hormel Foods
HRL
$13.9B
| $1.48M | ﹤0.01% |
307
+215
| +234% | +$10.3K |
|
1767
CALL
Leidos
LDOS
$14.1B
| $1.48M | ﹤0.01% |
158
-128
| -45% | -$12.6K |
|
1768
International Flavors & Fragrances
IFF
$19.4B
| $1.48M | ﹤0.01% |
12,075
+7,257
| +151% | +$917K |
|
1769
PUT
Cheniere Energy
LNG
$56.5B
| $1.48M | ﹤0.01% |
306
-733
| -71% | -$32K |
|
1770
MaxLinear
MXL
$6.49B
| $1.47M | ﹤0.01% |
68,652
+65,546
| +2,110% | +$1.13M |
|
1771
PUT
Vulcan Materials
VMC
$36.3B
| $1.47M | ﹤0.01% |
127
-47
| -27% | -$5.15K |
|
1772
CALL
Floor & Decor
FND
$5.81B
| $1.47M | ﹤0.01% |
255
+38
| +18% | +$1.73K |
|
|
MRO
1773
PUT
DELISTED
Marathon Oil Corporation
MRO
| $1.47M | ﹤0.01% |
2,399
-39
| -2% | -$216 |
|
1774
PUT
Yelp
YELP
$1.38B
| $1.46M | ﹤0.01% |
632
+230
| +57% | +$5.01K |
|
1775
CALL
Jefferies Financial Group
JEF
$12.9B
| $1.46M | ﹤0.01% |
980
+587
| +149% | +$7.86K |
|
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.