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 | |
|---|---|---|---|---|---|---|
226
CALL
Palo Alto Networks
PANW
$273B
| $17.3M | 0.05% |
5,520
-3,468
| -39% | -$108K |
|
227
PUT
ServiceNow
NOW
$98.4B
| $17.3M | 0.05% |
4,865
+2,650
| +120% | +$94K |
|
228
PUT
Autodesk
ADSK
$43B
| $17.1M | 0.05% |
1,326
+409
| +45% | +$55.2K |
|
|
STZ.B
229
CALL
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $16.8M | 0.05% |
1,044
-1,171
| -53% | -$237K |
|
230
CALL
American Express
AXP
$238B
| $16.7M | 0.05% |
1,753
+603
| +52% | +$63.1K |
|
231
PUT
Wayfair
W
$11.1B
| $16.7M | 0.05% |
1,854
+204
| +12% | +$21.5K |
|
232
CALL
Colgate-Palmolive
CL
$73.3B
| $16.6M | 0.05% |
2,790
+567
| +26% | +$35.5K |
|
233
PUT
United Parcel Service
UPS
$98.5B
| $16.6M | 0.05% |
1,701
+901
| +113% | +$97.7K |
|
234
PUT
Coca-Cola
KO
$354B
| $16.5M | 0.05% |
3,487
+469
| +16% | +$22.4K |
|
235
CALL
United Rentals
URI
$64.8B
| $16.5M | 0.05% |
1,609
+1,156
| +255% | +$139K |
|
236
PUT
Illumina
ILMN
$28.9B
| $16.5M | 0.05% |
565
+14
| +3% | +$4.34K |
|
237
CALL
JD.com
JD
$40.7B
| $16.4M | 0.05% |
7,848
+3,557
| +83% | +$79.6K |
|
238
PUT
Deere & Co
DE
$164B
| $16.4M | 0.05% |
1,101
-418
| -28% | -$61.2K |
|
239
PUT
GE Aerospace
GE
$354B
| $16.4M | 0.05% |
4,526
+3,384
| +296% | +$153K |
|
240
CALL
Shopify
SHOP
$154B
| $16.4M | 0.05% |
11,820
+3,250
| +38% | +$45.8K |
|
241
CALL
Twilio
TWLO
$27.8B
| $16.3M | 0.05% |
1,827
+497
| +37% | +$40.4K |
|
242
PUT
Dollar Tree
DLTR
$23.5B
| $16.2M | 0.05% |
1,797
+692
| +63% | +$58.4K |
|
243
PUT
Applied Materials
AMAT
$440B
| $16M | 0.05% |
4,874
+1,206
| +33% | +$41.3K |
|
244
PUT
Morgan Stanley
MS
$343B
| $15.9M | 0.05% |
4,022
+1,149
| +40% | +$50.1K |
|
245
PUT
NextEra Energy
NEE
$186B
| $15.7M | 0.05% |
3,612
+2,912
| +416% | +$127K |
|
246
CALL
Regeneron Pharmaceuticals
REGN
$68.3B
| $15.6M | 0.05% |
418
+110
| +36% | +$40.3K |
|
247
CALL
Oracle
ORCL
$362B
| $15.6M | 0.05% |
3,453
-1,802
| -34% | -$86.4K |
|
248
PUT
W.W. Grainger
GWW
$63.9B
| $15.6M | 0.05% |
552
+40
| +8% | +$11.9K |
|
249
CALL
Spotify
SPOT
$97.5B
| $15.5M | 0.05% |
1,370
-41
| -3% | -$5.73K |
|
250
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$332M
| $15.5M | 0.05% |
1,420
+210
| +17% | +$22.9K |
|
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.