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 | |
|---|---|---|---|---|---|---|
3226
Floor & Decor
FND
$5.99B
| $461K | ﹤0.01% |
+6,632
| New | +$482K |
|
3227
CALL
US Commodity Index
USCI
$365M
| $461K | ﹤0.01% |
8,200
+7,800
| +1,950% | +$427K |
|
|
TBCH
3228
CALL
Turtle Beach Corp
TBCH
$245M
| $461K | ﹤0.01% |
64,400
-20,900
| -25% | -$164K |
|
3229
PUT
Abercrombie & Fitch
ANF
$4.41B
| $460K | ﹤0.01% |
20,100
-27,500
| -58% | -$542K |
|
3230
BioCryst Pharmaceuticals
BCRX
$2.43B
| $460K | ﹤0.01% |
+40,082
| New | +$500K |
|
3231
Byrna Technologies
BYRN
$93.7M
| $460K | ﹤0.01% |
58,717
+56,648
| +2,738% | +$424K |
|
3232
CALL
TETRA Technologies
TTI
$1.14B
| $460K | ﹤0.01% |
133,200
+104,400
| +363% | +$406K |
|
3233
CALL
Petco
WOOF
$777M
| $460K | ﹤0.01% |
48,600
-91,300
| -65% | -$936K |
|
|
ANSS
3234
CALL
DELISTED
Ansys
ANSS
| $459K | ﹤0.01% |
1,900
-1,100
| -37% | -$256K |
|
3235
CALL
Booz Allen Hamilton
BAH
$8.59B
| $459K | ﹤0.01% |
4,400
-10,100
| -70% | -$1.05M |
|
3236
CALL
Protalix BioTherapeutics
PLX
$193M
| $459K | ﹤0.01% |
335,700
+102,600
| +44% | +$113K |
|
3237
CALL
Ryder
R
$10.3B
| $459K | ﹤0.01% |
5,500
-102,200
| -95% | -$8.58M |
|
|
OZON
3238
PUT
DELISTED
Ozon Holdings PLC American Depositary Shares, each ADS representing one ordinary share
OZON
| $459K | ﹤0.01% |
48,900
| – | – |
|
3239
CALL
Phillips Edison & Co
PECO
$5.46B
| $458K | ﹤0.01% |
14,400
+2,100
| +17% | +$64.6K |
|
3240
Planet Fitness
PLNT
$4.29B
| $458K | ﹤0.01% |
5,816
+3,087
| +113% | +$215K |
|
|
LTHM
3241
PUT
DELISTED
Livent Corporation
LTHM
| $458K | ﹤0.01% |
23,100
-36,000
| -61% | -$985K |
|
3242
Alta Equipment Group
ALTG
$208M
| $457K | ﹤0.01% |
34,715
-20,617
| -37% | -$248K |
|
3243
PUT
Essential Properties Realty Trust
EPRT
$6.9B
| $457K | ﹤0.01% |
19,500
+11,200
| +135% | +$244K |
|
3244
ProShares Ultra Bloomberg Crude Oil
UCO
$414M
| $457K | ﹤0.01% |
15,095
-42,152
| -74% | -$1.27M |
|
|
CFLT
3245
DELISTED
Confluent
CFLT
| $456K | ﹤0.01% |
20,529
+15,088
| +277% | +$350K |
|
|
ROCC
3246
CALL
DELISTED
Ranger Oil Corporation Class A Common Stock
ROCC
| $456K | ﹤0.01% |
11,300
+10,700
| +1,783% | +$424K |
|
3247
CALL
BlueLinx
BXC
$453M
| $455K | ﹤0.01% |
6,400
-700
| -10% | -$47.7K |
|
3248
PUT
Fiverr
FVRR
$398M
| $454K | ﹤0.01% |
15,600
-45,700
| -75% | -$1.44M |
|
|
TSE
3249
CALL
DELISTED
Trinseo
TSE
| $454K | ﹤0.01% |
20,000
-6,200
| -24% | -$137K |
|
3250
ADT
ADT
$5.24B
| $453K | ﹤0.01% |
49,975
-26,061
| -34% | -$232K |
|
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.