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 | |
|---|---|---|---|---|---|---|
2351
PUT
Zimmer Biomet
ZBH
$17.7B
| $1.12M | ﹤0.01% |
8,800
+2,700
| +44% | +$313K |
|
2352
PUT
Alexandria Real Estate Equities
ARE
$8.88B
| $1.12M | ﹤0.01% |
7,700
+2,400
| +45% | +$347K |
|
2353
PUT
Altimmune
ALT
$539M
| $1.12M | ﹤0.01% |
68,000
-166,800
| -71% | -$1.87M |
|
|
BIG
2354
CALL
DELISTED
Big Lots, Inc.
BIG
| $1.12M | ﹤0.01% |
76,100
-81,900
| -52% | -$1.41M |
|
2355
Carvana
CVNA
$43.3B
| $1.12M | ﹤0.01% |
+1,177,515
| New | +$2.49M |
|
2356
PUT
Gen Digital
GEN
$15.6B
| $1.12M | ﹤0.01% |
52,100
-10,200
| -16% | -$225K |
|
2357
PUT
Stratasys
SSYS
$697M
| $1.12M | ﹤0.01% |
94,100
-150,900
| -62% | -$2.01M |
|
2358
FLEX LNG
FLNG
$1.67B
| $1.11M | ﹤0.01% |
34,130
+3,057
| +10% | +$102K |
|
|
ETRN
2359
CALL
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $1.11M | ﹤0.01% |
166,300
+55,700
| +50% | +$432K |
|
2360
CALL
Energizer
ENR
$1.44B
| $1.11M | ﹤0.01% |
33,200
+26,300
| +381% | +$808K |
|
|
ESTE
2361
CALL
DELISTED
Earthstone Energy Inc. Class A Common Stock
ESTE
| $1.11M | ﹤0.01% |
78,100
+18,100
| +30% | +$269K |
|
2362
CALL
VeriSign
VRSN
$25.3B
| $1.11M | ﹤0.01% |
5,400
+4,200
| +350% | +$805K |
|
2363
PUT
Dolby
DLB
$4.72B
| $1.11M | ﹤0.01% |
15,700
-3,000
| -16% | -$207K |
|
|
RNAM
2364
PUT
DELISTED
Avidity Biosciences
RNAM
| $1.11M | ﹤0.01% |
49,900
+48,400
| +3,227% | +$722K |
|
2365
CALL
Rockwell Automation
ROK
$51.4B
| $1.11M | ﹤0.01% |
4,300
-100
| -2% | -$25.1K |
|
2366
PUT
Parker-Hannifin
PH
$125B
| $1.1M | ﹤0.01% |
3,800
-20,300
| -84% | -$5.81M |
|
|
RCM
2367
CALL
DELISTED
R1 RCM Inc. Common Stock
RCM
| $1.1M | ﹤0.01% |
101,000
+25,200
| +33% | +$320K |
|
2368
Direxion Daily Small Cap Bull 3x ETF
TNA
$1.34B
| $1.1M | ﹤0.01% |
34,824
-102,593
| -75% | -$3.56M |
|
|
AZUL
2369
CALL
DELISTED
Azul
AZUL
| $1.1M | ﹤0.01% |
180,400
-40,000
| -18% | -$312K |
|
2370
Banco Santander
SAN
$194B
| $1.1M | ﹤0.01% |
373,485
-25,524
| -6% | -$69.7K |
|
2371
PUT
Digital Turbine
APPS
$1.02B
| $1.1M | ﹤0.01% |
72,200
-5,400
| -7% | -$83K |
|
2372
Lightspeed Commerce
LSPD
$1.3B
| $1.1M | ﹤0.01% |
76,949
+29,121
| +61% | +$475K |
|
2373
CALL
Alliance Resource Partners
ARLP
$3.18B
| $1.1M | ﹤0.01% |
54,100
-8,100
| -13% | -$183K |
|
2374
PUT
Ascendis Pharma A/S
ASND
$16.7B
| $1.1M | ﹤0.01% |
+9,000
| New | +$1.04M |
|
2375
PUT
Warby Parker
WRBY
$3.01B
| $1.1M | ﹤0.01% |
81,500
+400
| +0.5% | +$6.12K |
|
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.