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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
RTN
251
CALL
DELISTED
Raytheon Company
RTN
| $15.5M | 0.05% |
1,010
-40
| -4% | -$7.16K |
|
252
CALL
United Airlines
UAL
$38.1B
| $15.5M | 0.05% |
1,846
-664
| -26% | -$58.3K |
|
253
PUT
Abbott
ABT
$175B
| $15.4M | 0.05% |
2,136
+1,422
| +199% | +$99.9K |
|
|
VMW
254
PUT
DELISTED
VMware, Inc
VMW
| $15.4M | 0.05% |
1,120
-466
| -29% | -$70.4K |
|
255
CALL
CME Group
CME
$90.1B
| $15.3M | 0.05% |
815
+465
| +133% | +$85.9K |
|
|
TIF
256
PUT
DELISTED
Tiffany & Co.
TIF
| $15.2M | 0.04% |
1,892
+1,414
| +296% | +$144K |
|
257
PUT
Thermo Fisher Scientific
TMO
$196B
| $15.2M | 0.04% |
677
+192
| +40% | +$45K |
|
258
PUT
Bristol-Myers Squibb
BMY
$124B
| $15M | 0.04% |
2,895
+436
| +18% | +$23.4K |
|
259
CALL
Tilray
TLRY
$514M
| $15M | 0.04% |
213
-125
| -37% | -$137K |
|
260
PUT
DuPont de Nemours
DD
$18.9B
| $15M | 0.04% |
1,106
+291
| +36% | +$41.8K |
|
261
CALL
Take-Two Interactive
TTWO
$43.4B
| $14.9M | 0.04% |
1,451
+663
| +84% | +$76.3K |
|
262
CALL
Expedia Group
EXPE
$31.3B
| $14.8M | 0.04% |
1,316
+403
| +44% | +$48.2K |
|
263
CALL
Coca-Cola
KO
$354B
| $14.7M | 0.04% |
3,097
-489
| -14% | -$23.4K |
|
264
CALL
Marathon Petroleum
MPC
$92.2B
| $14.6M | 0.04% |
2,482
-88
| -3% | -$6.01K |
|
|
SHNY
265
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $14.6M | 0.04% |
6,939
+3,482
| +101% | +$7.33M |
|
|
PPLC
266
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $14.5M | 0.04% |
7,957
+5,270
| +196% | +$190K |
|
267
PUT
American Tower
AMT
$77.4B
| $14.5M | 0.04% |
917
+111
| +14% | +$17.4K |
|
|
VMW
268
CALL
DELISTED
VMware, Inc
VMW
| $14.5M | 0.04% |
1,057
+231
| +28% | +$34.9K |
|
269
PUT
Palo Alto Networks
PANW
$273B
| $14.3M | 0.04% |
4,548
-792
| -15% | -$24.7K |
|
|
WBA
270
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $14.1M | 0.04% |
2,062
+1,092
| +113% | +$84.7K |
|
|
XYZ
271
Block Inc
XYZ
$46.1B
| $14.1M | 0.04% |
250,964
+28,385
| +13% | +$2M |
|
272
PUT
Texas Instruments
TXN
$268B
| $14M | 0.04% |
1,477
+454
| +44% | +$43.9K |
|
|
AABA
273
CALL
DELISTED
Altaba Inc
AABA
| $13.9M | 0.04% |
2,405
-1,004
| -29% | -$61.9K |
|
274
PUT
CVS Health
CVS
$138B
| $13.8M | 0.04% |
2,101
+714
| +51% | +$53.3K |
|
275
CALL
Intuit
INTU
$77.8B
| $13.7M | 0.04% |
696
+208
| +43% | +$43.3K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.