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
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1801
PUT
Nutrien
NTR
$32.7B
| $1.25M | ﹤0.01% |
237
-227
| -49% | -$11.8K |
|
1802
CALL
Viavi Solutions
VIAV
$9.75B
| $1.25M | ﹤0.01% |
1,008
+719
| +249% | +$8.42K |
|
1803
CALL
Vornado Realty Trust
VNO
$7.47B
| $1.25M | ﹤0.01% |
185
+79
| +75% | +$5.3K |
|
1804
Cars.com
CARS
$641M
| $1.24M | ﹤0.01% |
54,543
+46,819
| +606% | +$1.13M |
|
|
VSI
1805
PUT
DELISTED
Vitamin Shoppe Inc.
VSI
| $1.24M | ﹤0.01% |
1,767
+1,743
| +7,263% | +$10.3K |
|
1806
CALL
O'Reilly Automotive
ORLY
$72.4B
| $1.24M | ﹤0.01% |
480
-1,350
| -74% | -$32.7K |
|
|
SKX
1807
PUT
DELISTED
Skechers
SKX
| $1.24M | ﹤0.01% |
369
-122
| -25% | -$3.65K |
|
1808
S&P Global
SPGI
$126B
| $1.24M | ﹤0.01% |
+5,891
| New | +$1.14M |
|
1809
CALL
Boston Beer
SAM
$1.88B
| $1.24M | ﹤0.01% |
42
-109
| -72% | -$29.8K |
|
1810
Live Nation Entertainment
LYV
$41.2B
| $1.24M | ﹤0.01% |
+19,452
| New | +$1.1M |
|
1811
CALL
Whirlpool
WHR
$2.42B
| $1.24M | ﹤0.01% |
93
-58
| -38% | -$7.66K |
|
1812
CALL
Copa Holdings
CPA
$5.56B
| $1.23M | ﹤0.01% |
153
-55
| -26% | -$4.84K |
|
1813
PUT
MSC Industrial Direct
MSM
$7.02B
| $1.23M | ﹤0.01% |
149
+117
| +366% | +$9.63K |
|
1814
CALL
Plains All American Pipeline
PAA
$17.4B
| $1.23M | ﹤0.01% |
503
-959
| -66% | -$22.7K |
|
1815
CALL
New York Times
NYT
$11.6B
| $1.23M | ﹤0.01% |
375
+239
| +176% | +$7.08K |
|
1816
CALL
Cardinal Health
CAH
$53.4B
| $1.23M | ﹤0.01% |
255
-112
| -31% | -$5.61K |
|
1817
PUT
Guardant Health
GH
$19.5B
| $1.23M | ﹤0.01% |
+160
| New | +$8.87K |
|
1818
CALL
Murphy Oil
MUR
$5.58B
| $1.23M | ﹤0.01% |
419
+362
| +635% | +$10.3K |
|
1819
Meta Platforms (Facebook)
META
$1.51T
| $1.23M | ﹤0.01% |
+7,354
| New | +$1.17M |
|
1820
PUT
AvalonBay Communities
AVB
$27.1B
| $1.22M | ﹤0.01% |
61
-26
| -30% | -$4.97K |
|
1821
CALL
Strategic Education
STRA
$1.71B
| $1.22M | ﹤0.01% |
+93
| New | +$11.3K |
|
1822
CALL
HF Sinclair
DINO
$15.9B
| $1.22M | ﹤0.01% |
247
+50
| +25% | +$2.66K |
|
1823
CALL
ManpowerGroup
MAN
$2.39B
| $1.22M | ﹤0.01% |
147
+64
| +77% | +$5.04K |
|
1824
CALL
Madrigal Pharmaceuticals
MDGL
$12.6B
| $1.22M | ﹤0.01% |
97
+17
| +21% | +$2.11K |
|
|
BEAT
1825
PUT
DELISTED
BioTelemetry, Inc.
BEAT
| $1.21M | ﹤0.01% |
194
+44
| +29% | +$3.02K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.