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 | |
|---|---|---|---|---|---|---|
226
PUT
Starbucks
SBUX
$119B
| $19.2M | 0.05% |
2,579
-618
| -19% | -$42.5K |
|
227
CALL
Autodesk
ADSK
$43B
| $18.9M | 0.05% |
1,215
-266
| -18% | -$39.8K |
|
228
CALL
Eli Lilly
LLY
$1.04T
| $18.8M | 0.05% |
1,451
-802
| -36% | -$97.5K |
|
229
CALL
Deere & Co
DE
$164B
| $18.6M | 0.05% |
1,166
-719
| -38% | -$115K |
|
230
PUT
Applied Materials
AMAT
$440B
| $18.6M | 0.05% |
4,691
-183
| -4% | -$6.95K |
|
231
CALL
Lowe's Companies
LOW
$115B
| $18.6M | 0.05% |
1,699
-425
| -20% | -$42.4K |
|
232
PUT
JD.com
JD
$40.7B
| $18.5M | 0.05% |
6,135
+28
| +0.5% | +$712 |
|
233
CALL
Merck
MRK
$315B
| $18.4M | 0.05% |
2,322
-1,449
| -38% | -$108K |
|
234
PUT
Accenture
ACN
$85.7B
| $18.4M | 0.05% |
1,046
+230
| +28% | +$36.1K |
|
235
PUT
eBay
EBAY
$49.3B
| $18.4M | 0.05% |
4,950
+772
| +18% | +$26.8K |
|
236
PUT
AutoZone
AZO
$48.5B
| $18.3M | 0.05% |
179
-266
| -60% | -$239K |
|
|
CGC
237
PUT
Canopy Growth
CGC
$384M
| $18.3M | 0.05% |
421
+177
| +73% | +$77.6K |
|
238
PUT
ConocoPhillips
COP
$145B
| $18.3M | 0.05% |
2,737
+540
| +25% | +$36.3K |
|
239
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.56B
| $18.2M | 0.05% |
26,930
+11,230
| +72% | +$126K |
|
240
CALL
Coca-Cola
KO
$354B
| $18.2M | 0.05% |
3,881
+784
| +25% | +$36.7K |
|
|
RHT
241
CALL
DELISTED
Red Hat Inc
RHT
| $18.1M | 0.05% |
992
-950
| -49% | -$170K |
|
|
RTN
242
PUT
DELISTED
Raytheon Company
RTN
| $18.1M | 0.05% |
993
+361
| +57% | +$62.9K |
|
|
243
iShares Russell 2000 ETF
IWM
$81.6B
| $18.1M | 0.05% |
118,086
-401,139
| -77% | -$60.3M |
|
244
CALL
ServiceNow
NOW
$98.4B
| $18.1M | 0.05% |
3,665
+765
| +26% | +$33.6K |
|
245
PUT
Palo Alto Networks
PANW
$273B
| $17.7M | 0.05% |
4,374
-174
| -4% | -$6.45K |
|
246
CALL
AB InBev
BUD
$161B
| $17.6M | 0.05% |
2,102
+868
| +70% | +$66.7K |
|
|
AGN
247
PUT
DELISTED
Allergan plc
AGN
| $17.6M | 0.05% |
1,204
-799
| -40% | -$116K |
|
|
248
Baidu
BIDU
$36.6B
| $17.6M | 0.05% |
106,674
+73,786
| +224% | +$12.3M |
|
249
PUT
United Parcel Service
UPS
$98.5B
| $17.5M | 0.05% |
1,570
-131
| -8% | -$13.9K |
|
|
AABA
250
CALL
DELISTED
Altaba Inc
AABA
| $17.5M | 0.05% |
2,355
-50
| -2% | -$3.44K |
|
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.