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 | |
|---|---|---|---|---|---|---|
801
PUT
Mondelez International
MDLZ
$77.1B
| $3.25M | 0.01% |
813
-2,627
| -76% | -$112K |
|
|
P
802
PUT
Everpure Inc
P
$25B
| $3.23M | 0.01% |
2,009
+531
| +36% | +$10.5K |
|
803
PUT
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.9M
| $3.23M | 0.01% |
261
+175
| +203% | +$21.8K |
|
804
PUT
Progressive
PGR
$120B
| $3.22M | 0.01% |
534
+455
| +576% | +$30.3K |
|
|
CS
805
PUT
DELISTED
Credit Suisse Group
CS
| $3.21M | 0.01% |
2,957
+921
| +45% | +$11.4K |
|
806
PUT
F5
FFIV
$21.9B
| $3.21M | 0.01% |
198
-281
| -59% | -$48.2K |
|
807
PUT
Canadian Solar
CSIQ
$997M
| $3.2M | 0.01% |
2,235
+928
| +71% | +$14K |
|
808
PUT
Citizens Financial Group
CFG
$30.3B
| $3.19M | 0.01% |
1,075
+684
| +175% | +$24K |
|
809
CALL
HSBC
HSBC
$349B
| $3.19M | 0.01% |
805
+529
| +192% | +$21.2K |
|
810
Ralph Lauren
RL
$22.1B
| $3.19M | 0.01% |
30,827
+25,046
| +433% | +$2.95M |
|
|
BERY
811
PUT
DELISTED
Berry Global Group, Inc.
BERY
| $3.18M | 0.01% |
730
+122
| +20% | +$5.21K |
|
812
PUT
Bunge Global
BG
$23.7B
| $3.18M | 0.01% |
595
-177
| -23% | -$10.9K |
|
|
GAP
813
CALL
The Gap Inc
GAP
$6.8B
| $3.18M | 0.01% |
1,234
+474
| +62% | +$12.7K |
|
814
CALL
Exelon
EXC
$48.4B
| $3.15M | 0.01% |
980
-210
| -18% | -$6.72K |
|
815
CALL
Domino's
DPZ
$10.7B
| $3.15M | 0.01% |
127
-51
| -29% | -$13.4K |
|
816
PUT
Automatic Data Processing
ADP
$97.1B
| $3.15M | 0.01% |
240
-199
| -45% | -$28.1K |
|
817
State Street SPDR S&P Biotech ETF
XBI
$10.2B
| $3.14M | 0.01% |
+43,720
| New | +$3.52M |
|
818
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $3.12M | 0.01% |
35,862
+10,228
| +40% | +$867K |
|
819
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $3.1M | 0.01% |
1,217
+126
| +12% | +$3.24K |
|
820
PUT
Gartner
IT
$8.95B
| $3.09M | 0.01% |
242
+171
| +241% | +$24.7K |
|
821
PUT
OSI Systems
OSIS
$3.53B
| $3.08M | 0.01% |
421
+245
| +139% | +$17.7K |
|
822
Halliburton
HAL
$27.3B
| $3.08M | 0.01% |
115,931
+9,625
| +9% | +$325K |
|
823
PUT
Newell Brands
NWL
$2.14B
| $3.08M | 0.01% |
1,657
-1,140
| -41% | -$22.7K |
|
824
CALL
Microchip Technology
MCHP
$44.2B
| $3.08M | 0.01% |
856
-102
| -11% | -$3.6K |
|
825
PUT
International Flavors & Fragrances
IFF
$18.8B
| $3.07M | 0.01% |
229
+53
| +30% | +$7.33K |
|
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.