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 | |
|---|---|---|---|---|---|---|
|
WWE
1051
CALL
DELISTED
World Wrestling Entertainment
WWE
| $2.92M | 0.01% |
336
-199
| -37% | -$16.7K |
|
1052
CALL
Thomson Reuters
TRI
$39.5B
| $2.91M | 0.01% |
467
+141
| +43% | +$7.87K |
|
1053
Dollar Tree
DLTR
$23.3B
| $2.91M | 0.01% |
27,691
+13,672
| +98% | +$1.34M |
|
|
NVO
1054
CALL
Novo Nordisk
NVO
$217B
| $2.91M | 0.01% |
1,112
+250
| +29% | +$6.14K |
|
1055
CALL
Fortinet
FTNT
$112B
| $2.9M | 0.01% |
1,730
-1,075
| -38% | -$17.1K |
|
1056
CALL
Tractor Supply
TSCO
$16.1B
| $2.89M | 0.01% |
1,480
-740
| -33% | -$13.5K |
|
1057
CALL
Philips
PHG
$25.5B
| $2.89M | 0.01% |
911
+474
| +108% | +$14.1K |
|
1058
CALL
Floor & Decor
FND
$5.82B
| $2.88M | 0.01% |
700
+645
| +1,173% | +$22.6K |
|
1059
PUT
Fair Isaac
FICO
$28.6B
| $2.88M | 0.01% |
106
+101
| +2,020% | +$23.7K |
|
1060
ASML
ASML
$672B
| $2.87M | 0.01% |
15,281
+8,415
| +123% | +$1.49M |
|
|
WAGE
1061
PUT
DELISTED
WageWorks, Inc.
WAGE
| $2.87M | 0.01% |
761
+748
| +5,754% | +$24.4K |
|
|
CTRA
1062
PUT
DELISTED
Coterra Energy
CTRA
| $2.87M | 0.01% |
1,099
+31
| +3% | +$777 |
|
1063
CALL
Macy's
M
$6.14B
| $2.86M | 0.01% |
1,192
-381
| -24% | -$9.62K |
|
1064
CALL
Five Below
FIVE
$11.2B
| $2.86M | 0.01% |
230
+9
| +4% | +$1.09K |
|
1065
PUT
DTE Energy
DTE
$31.1B
| $2.86M | 0.01% |
269
+221
| +460% | +$22.3K |
|
|
ATH
1066
CALL
DELISTED
Athene Holding Ltd. Class A Common Shares
ATH
| $2.85M | 0.01% |
699
+658
| +1,605% | +$28.2K |
|
1067
CALL
Alaska Air
ALK
$5.16B
| $2.85M | 0.01% |
508
+278
| +121% | +$17K |
|
1068
PUT
Cboe Global Markets
CBOE
$29.8B
| $2.84M | 0.01% |
298
-744
| -71% | -$70.6K |
|
1069
CALL
McKesson
MCK
$98.3B
| $2.84M | 0.01% |
243
-351
| -59% | -$43.3K |
|
1070
Abbott
ABT
$180B
| $2.84M | 0.01% |
+35,528
| New | +$2.64M |
|
|
SNP
1071
CALL
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $2.84M | 0.01% |
357
+16
| +5% | +$1.31K |
|
1072
General Mills
GIS
$19.2B
| $2.83M | 0.01% |
54,793
+30,050
| +121% | +$1.36M |
|
|
ACIA
1073
PUT
DELISTED
Acacia Communications Inc
ACIA
| $2.83M | 0.01% |
494
+431
| +684% | +$20.6K |
|
1074
CALL
Booz Allen Hamilton
BAH
$8.73B
| $2.83M | 0.01% |
487
+468
| +2,463% | +$24.3K |
|
1075
PUT
Genuine Parts
GPC
$17.1B
| $2.82M | 0.01% |
252
+186
| +282% | +$19.2K |
|
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.