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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
1826
Alphabet (Google) Class A
GOOGL
$3.91T
| $1.33M | ﹤0.01% |
19,900
-63,380
| -76% | -$4.09M |
|
|
SCIU
1827
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $1.33M | ﹤0.01% |
460
-316
| -41% | -$10.8K |
|
1828
CALL
CenterPoint Energy
CNP
$29.1B
| $1.33M | ﹤0.01% |
488
+361
| +284% | +$9.81K |
|
1829
PUT
CoreCivic
CXW
$3.1B
| $1.33M | ﹤0.01% |
764
+506
| +196% | +$8.01K |
|
1830
PUT
Cirrus Logic
CRUS
$6.74B
| $1.33M | ﹤0.01% |
161
+90
| +127% | +$6.1K |
|
|
NVO
1831
CALL
Novo Nordisk
NVO
$216B
| $1.32M | ﹤0.01% |
458
-694
| -60% | -$19.2K |
|
|
DISH
1832
DELISTED
DISH Network Corp.
DISH
| $1.32M | ﹤0.01% |
37,346
+6,471
| +21% | +$224K |
|
1833
PUT
AGNC Investment
AGNC
$12.3B
| $1.32M | ﹤0.01% |
748
-514
| -41% | -$8.74K |
|
1834
CALL
Vail Resorts
MTN
$5.19B
| $1.32M | ﹤0.01% |
55
-40
| -42% | -$9.47K |
|
1835
PUT
Copa Holdings
CPA
$5.56B
| $1.32M | ﹤0.01% |
122
-76
| -38% | -$7.93K |
|
1836
PUT
Dana Inc
DAN
$2.91B
| $1.31M | ﹤0.01% |
722
-31
| -4% | -$517 |
|
1837
CALL
Exelixis
EXEL
$13.9B
| $1.31M | ﹤0.01% |
746
-362
| -33% | -$6.14K |
|
|
NEWR
1838
CALL
DELISTED
New Relic, Inc.
NEWR
| $1.31M | ﹤0.01% |
200
+55
| +38% | +$3.57K |
|
|
ANSS
1839
CALL
DELISTED
Ansys
ANSS
| $1.31M | ﹤0.01% |
51
+25
| +96% | +$5.91K |
|
|
AXON
1840
CALL
Axon Enterprise
AXON
$40.5B
| $1.31M | ﹤0.01% |
179
-96
| -35% | -$6.08K |
|
1841
PUT
Federal Agricultural Mortgage Class A
AGM.A
$1.61B
| $1.31M | ﹤0.01% |
157
+149
| +1,863% | +$10.8K |
|
1842
Equity Residential
EQR
$25.4B
| $1.31M | ﹤0.01% |
16,201
+14,250
| +730% | +$1.21M |
|
1843
CALL
GoDaddy
GDDY
$12.3B
| $1.31M | ﹤0.01% |
193
-41
| -18% | -$2.71K |
|
|
PTLA
1844
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $1.3M | ﹤0.01% |
54,636
+27,228
| +99% | +$751K |
|
1845
Nexstar Media Group
NXST
$5.6B
| $1.3M | ﹤0.01% |
11,120
-2,496
| -18% | -$261K |
|
|
DAY
1846
CALL
DELISTED
Dayforce
DAY
| $1.3M | ﹤0.01% |
192
+89
| +86% | +$4.92K |
|
1847
CALL
Synaptics
SYNA
$4.41B
| $1.3M | ﹤0.01% |
198
-108
| -35% | -$5.69K |
|
1848
CALL
Teck Resources
TECK
$29.5B
| $1.3M | ﹤0.01% |
750
-131
| -15% | -$2.14K |
|
|
CONE
1849
CALL
DELISTED
CyrusOne Inc Common Stock
CONE
| $1.3M | ﹤0.01% |
199
-245
| -55% | -$16.8K |
|
1850
Amgen
AMGN
$203B
| $1.3M | ﹤0.01% |
5,397
-32,341
| -86% | -$7.13M |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.