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 | |
|---|---|---|---|---|---|---|
|
NVRO
1776
PUT
DELISTED
NEVRO CORP.
NVRO
| $1.29M | ﹤0.01% |
206
+153
| +289% | +$7.19K |
|
1777
PUT
Box
BOX
$4.02B
| $1.29M | ﹤0.01% |
666
-79
| -11% | -$1.64K |
|
1778
CALL
Interactive Brokers
IBKR
$40.9B
| $1.28M | ﹤0.01% |
988
+420
| +74% | +$5.52K |
|
1779
PUT
Pricesmart
PSMT
$5.75B
| $1.28M | ﹤0.01% |
217
+189
| +675% | +$11.8K |
|
|
AMRN
1780
Amarin Corp
AMRN
$284M
| $1.28M | ﹤0.01% |
3,076
-456
| -13% | -$164K |
|
1781
CALL
CareDx
CDNA
$1.92B
| $1.28M | ﹤0.01% |
405
+387
| +2,150% | +$11.3K |
|
|
FDC
1782
PUT
DELISTED
First Data Corporation
FDC
| $1.28M | ﹤0.01% |
486
-49
| -9% | -$1.16K |
|
1783
Bread Financial
BFH
$4.21B
| $1.27M | ﹤0.01% |
9,127
+2,584
| +39% | +$352K |
|
1784
PUT
Omega Healthcare
OHI
$15.4B
| $1.27M | ﹤0.01% |
334
+98
| +42% | +$3.63K |
|
1785
Tyson Foods
TSN
$20.2B
| $1.27M | ﹤0.01% |
18,354
-1,624
| -8% | -$101K |
|
1786
PUT
Veeva Systems
VEEV
$30.3B
| $1.27M | ﹤0.01% |
100
-151
| -60% | -$17K |
|
1787
Canadian Solar
CSIQ
$906M
| $1.26M | ﹤0.01% |
67,942
-16,271
| -19% | -$335K |
|
1788
CALL
Astec Industries
ASTE
$1.3B
| $1.26M | ﹤0.01% |
+335
| New | +$12.5K |
|
1789
CALL
Consolidated Edison
ED
$41.6B
| $1.26M | ﹤0.01% |
149
-29
| -16% | -$2.32K |
|
1790
CALL
Huntington Ingalls Industries
HII
$11.3B
| $1.26M | ﹤0.01% |
61
-24
| -28% | -$4.92K |
|
1791
iShares TIPS Bond ETF
TIP
$14.5B
| $1.26M | ﹤0.01% |
11,175
+11,030
| +7,607% | +$1.22M |
|
1792
PUT
Madison Square Garden
MSGS
$9.54B
| $1.26M | ﹤0.01% |
60
+22
| +58% | +$4.47K |
|
|
AXDX
1793
PUT
DELISTED
Accelerate Diagnostics
AXDX
| $1.26M | ﹤0.01% |
60
+16
| +36% | +$3K |
|
1794
CALL
eHealth
EHTH
$42.5M
| $1.26M | ﹤0.01% |
202
+181
| +862% | +$9.98K |
|
|
PBCT
1795
CALL
DELISTED
People's United Financial Inc
PBCT
| $1.26M | ﹤0.01% |
765
+619
| +424% | +$10.3K |
|
1796
CALL
Manchester United
MANU
$3.91B
| $1.26M | ﹤0.01% |
654
+643
| +5,845% | +$12.6K |
|
|
NBL
1797
CALL
DELISTED
Noble Energy, Inc.
NBL
| $1.26M | ﹤0.01% |
508
+461
| +981% | +$10.4K |
|
1798
CALL
Gaming and Leisure Properties
GLPI
$12.8B
| $1.25M | ﹤0.01% |
325
+83
| +34% | +$3.02K |
|
1799
CALL
Axsome Therapeutics
AXSM
$12.4B
| $1.25M | ﹤0.01% |
+880
| New | +$8.17K |
|
|
MIK
1800
CALL
DELISTED
Michaels Stores, Inc
MIK
| $1.25M | ﹤0.01% |
1,096
+102
| +10% | +$1.4K |
|
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.