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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
901
CALL
Lennar Class A
LEN
$19.8B
| $8.94M | 0.01% |
102,060
-96,999
| -49% | -$7.86M |
|
902
CALL
Ferrari
RACE
$63.2B
| $8.91M | 0.01% |
41,600
+19,600
| +89% | +$4.04M |
|
903
PUT
Boyd Gaming
BYD
$6.43B
| $8.91M | 0.01% |
163,400
-66,700
| -29% | -$3.76M |
|
904
PUT
Post Holdings
POST
$4.09B
| $8.9M | 0.01% |
98,600
-39,400
| -29% | -$3.51M |
|
905
CALL
Novavax
NVAX
$1.29B
| $8.89M | 0.01% |
865,300
+479,500
| +124% | +$8.46M |
|
906
CALL
Bath & Body Works
BBWI
$3.9B
| $8.89M | 0.01% |
211,200
+83,600
| +66% | +$3.12M |
|
907
PUT
Lyft
LYFT
$5.32B
| $8.86M | 0.01% |
804,400
+282,100
| +54% | +$3.4M |
|
908
CALL
Hertz
HTZ
$603M
| $8.82M | 0.01% |
578,500
+263,200
| +83% | +$4.43M |
|
909
PUT
DuPont de Nemours
DD
$18.6B
| $8.79M | 0.01% |
102,053
+55,448
| +119% | +$4.43M |
|
910
PUT
Toyota
TM
$209B
| $8.78M | 0.01% |
64,300
+43,300
| +206% | +$6.04M |
|
|
WWE
911
CALL
DELISTED
World Wrestling Entertainment
WWE
| $8.64M | 0.01% |
126,100
+89,500
| +245% | +$6.76M |
|
912
PUT
Southern Company
SO
$109B
| $8.63M | 0.01% |
120,900
-173,300
| -59% | -$11.6M |
|
913
CALL
Elanco Animal Health
ELAN
$12.4B
| $8.63M | 0.01% |
706,400
+79,400
| +13% | +$990K |
|
914
Suncor Energy
SU
$78.4B
| $8.52M | 0.01% |
268,361
-10,147
| -4% | -$334K |
|
915
CALL
Williams-Sonoma
WSM
$25.7B
| $8.5M | 0.01% |
148,000
-187,200
| -56% | -$11.2M |
|
916
CALL
Marathon Digital Holdings
MARA
$4.87B
| $8.5M | 0.01% |
2,486,400
+314,500
| +14% | +$2.64M |
|
|
CPE
917
CALL
DELISTED
Callon Petroleum Company
CPE
| $8.49M | 0.01% |
228,900
+84,000
| +58% | +$3.45M |
|
|
DENT
918
CALL
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $8.48M | 0.01% |
1,202,100
+546,500
| +83% | +$3.86M |
|
|
MAXR
919
CALL
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $8.47M | 0.01% |
163,800
+138,700
| +553% | +$3.81M |
|
920
PUT
Cardinal Health
CAH
$52.9B
| $8.47M | 0.01% |
110,200
-84,300
| -43% | -$6.41M |
|
|
DFS
921
CALL
DELISTED
Discover Financial Services
DFS
| $8.44M | 0.01% |
86,300
+19,000
| +28% | +$1.91M |
|
922
CALL
Ball Corp
BALL
$16.6B
| $8.44M | 0.01% |
165,000
+94,400
| +134% | +$4.89M |
|
|
PPLI
923
PUT
People Inc
PPLI
$3.14B
| $8.43M | 0.01% |
231,366
+124,703
| +117% | +$4.93M |
|
924
CALL
Annaly Capital Management
NLY
$16.7B
| $8.42M | 0.01% |
399,400
-160,200
| -29% | -$3.15M |
|
|
DISH
925
PUT
DELISTED
DISH Network Corp.
DISH
| $8.42M | 0.01% |
599,700
-312,200
| -34% | -$4.61M |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.