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 | |
|---|---|---|---|---|---|---|
1726
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $1.35M | ﹤0.01% |
123
-106
| -46% | -$11.2K |
|
1727
PUT
Tyson Foods
TSN
$20.2B
| $1.35M | ﹤0.01% |
194
-346
| -64% | -$21.4K |
|
1728
VanEck JP Morgan EM Local Currency Bond ETF
EMLC
$4.74B
| $1.34M | ﹤0.01% |
40,326
+39,206
| +3,501% | +$1.33M |
|
1729
CALL
Protolabs
PRLB
$1.86B
| $1.34M | ﹤0.01% |
128
+33
| +35% | +$3.7K |
|
|
SGI
1730
PUT
Somnigroup International
SGI
$15.1B
| $1.34M | ﹤0.01% |
932
-216
| -19% | -$2.92K |
|
1731
CALL
State Street
STT
$50.9B
| $1.34M | ﹤0.01% |
204
-326
| -62% | -$22.6K |
|
1732
CALL
Williams-Sonoma
WSM
$26.7B
| $1.34M | ﹤0.01% |
476
-170
| -26% | -$4.69K |
|
1733
CALL
American Financial Group
AFG
$11.9B
| $1.34M | ﹤0.01% |
139
+137
| +6,850% | +$13.1K |
|
|
INST
1734
PUT
DELISTED
Instructure, Inc.
INST
| $1.33M | ﹤0.01% |
283
+272
| +2,473% | +$11.4K |
|
|
UFS
1735
CALL
DELISTED
DOMTAR CORPORATION (New)
UFS
| $1.33M | ﹤0.01% |
268
+166
| +163% | +$7.9K |
|
1736
PUT
Freshpet
FRPT
$2.83B
| $1.33M | ﹤0.01% |
+314
| New | +$12.1K |
|
1737
PUT
OFG Bancorp
OFG
$2.21B
| $1.33M | ﹤0.01% |
671
+405
| +152% | +$7.84K |
|
1738
PUT
Exelixis
EXEL
$13.9B
| $1.32M | ﹤0.01% |
557
-516
| -48% | -$11.8K |
|
1739
CALL
Signet Jewelers
SIG
$3.55B
| $1.32M | ﹤0.01% |
488
-156
| -24% | -$4.3K |
|
1740
PUT
Enterprise Products Partners
EPD
$83.8B
| $1.32M | ﹤0.01% |
455
-256
| -36% | -$7.15K |
|
1741
CALL
Match Group
MTCH
$8.84B
| $1.32M | ﹤0.01% |
234
-107
| -31% | -$5.66K |
|
1742
PUT
Synopsys
SNPS
$71.5B
| $1.32M | ﹤0.01% |
115
-44
| -28% | -$4.36K |
|
1743
CALL
Levi Strauss
LEVI
$9.44B
| $1.32M | ﹤0.01% |
+562
| New | +$12.6K |
|
1744
PUT
Baker Hughes
BKR
$56.8B
| $1.32M | ﹤0.01% |
477
+78
| +20% | +$1.97K |
|
1745
Cummins
CMI
$91.7B
| $1.32M | ﹤0.01% |
8,379
+3,998
| +91% | +$600K |
|
1746
CALL
National Beverage
FIZZ
$2.87B
| $1.32M | ﹤0.01% |
458
+134
| +41% | +$4.77K |
|
1747
Ventas
VTR
$48.9B
| $1.32M | ﹤0.01% |
20,705
+6,955
| +51% | +$435K |
|
1748
Coherent
COHR
$55.2B
| $1.32M | ﹤0.01% |
35,468
-4,688
| -12% | -$173K |
|
1749
CALL
PPG Industries
PPG
$25.9B
| $1.32M | ﹤0.01% |
117
-3
| -3% | -$321 |
|
1750
CALL
Northern Trust
NTRS
$22.2B
| $1.32M | ﹤0.01% |
146
-113
| -44% | -$10.2K |
|
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.