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 | |
|---|---|---|---|---|---|---|
201
PUT
Ulta Beauty
ULTA
$20.8B
| $20.2M | 0.06% |
825
-104
| -11% | -$28.7K |
|
202
CALL
Las Vegas Sands
LVS
$30B
| $20.2M | 0.06% |
3,876
+1,315
| +51% | +$71.3K |
|
203
CALL
Philip Morris
PM
$303B
| $20.1M | 0.06% |
3,009
-1,035
| -26% | -$86.4K |
|
204
PUT
AbbVie
ABBV
$448B
| $20M | 0.06% |
2,172
-1,159
| -35% | -$102K |
|
205
CALL
Illumina
ILMN
$28.9B
| $20M | 0.06% |
686
+370
| +117% | +$115K |
|
206
CALL
United Parcel Service
UPS
$98.5B
| $19.9M | 0.06% |
2,042
-506
| -20% | -$54.9K |
|
207
CALL
Amgen
AMGN
$198B
| $19.8M | 0.06% |
1,019
-834
| -45% | -$163K |
|
208
CALL
Valero Energy
VLO
$92.3B
| $19.8M | 0.06% |
2,642
+1,638
| +163% | +$144K |
|
209
CALL
Lowe's Companies
LOW
$115B
| $19.6M | 0.06% |
2,124
-366
| -15% | -$35.3K |
|
|
210
Apple
AAPL
$4.79T
| $19.6M | 0.06% |
496,528
+419,440
| +544% | +$20.3M |
|
211
PUT
Comcast
CMCSA
$84B
| $19.5M | 0.06% |
5,731
+1,588
| +38% | +$58K |
|
212
PUT
NXP Semiconductors
NXPI
$70.4B
| $19.2M | 0.06% |
2,615
-1,596
| -38% | -$126K |
|
213
PUT
O'Reilly Automotive
ORLY
$71.7B
| $19.1M | 0.06% |
8,340
+1,470
| +21% | +$33.5K |
|
|
214
CALL
Comcast
CMCSA
$84B
| $19.1M | 0.06% |
5,607
+1,940
| +53% | +$70.8K |
|
215
CALL
Autodesk
ADSK
$43B
| $19M | 0.06% |
1,481
+835
| +129% | +$113K |
|
216
PUT
Northrop Grumman
NOC
$74.6B
| $18.9M | 0.06% |
771
+4
| +0.5% | +$1.1K |
|
217
CALL
Applied Materials
AMAT
$440B
| $18.5M | 0.05% |
5,662
+2,296
| +68% | +$78.7K |
|
218
State Street Financial Select Sector SPDR ETF
XLF
$55.3B
| $18.2M | 0.05% |
762,502
+486,634
| +176% | +$12.6M |
|
219
PUT
Shopify
SHOP
$154B
| $17.9M | 0.05% |
12,920
+2,750
| +27% | +$38.7K |
|
220
CALL
DuPont de Nemours
DD
$18.9B
| $17.9M | 0.05% |
1,320
-79
| -6% | -$11.3K |
|
221
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $17.7M | 0.05% |
3,873
+457
| +13% | +$9.21K |
|
222
PUT
Delta Air Lines
DAL
$54.9B
| $17.5M | 0.05% |
3,516
+1,943
| +124% | +$106K |
|
223
PUT
Eli Lilly
LLY
$1.04T
| $17.4M | 0.05% |
1,505
+432
| +40% | +$48.3K |
|
|
WBA
224
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $17.4M | 0.05% |
2,544
-864
| -25% | -$67K |
|
225
PUT
ProShares UltraShort Health Care
RXD
$3.38M
| $17.3M | 0.05% |
1,207
+252
| +26% | +$24.1K |
|
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.