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 | |
|---|---|---|---|---|---|---|
4826
MacroGenics
MGNX
$233M
| $122K | ﹤0.01% |
18,289
-1,134
| -6% | -$6.22K |
|
4827
CALL
Utz Brands
UTZ
$1.24B
| $122K | ﹤0.01% |
7,700
-6,300
| -45% | -$104K |
|
4828
Viasat
VSAT
$9.67B
| $122K | ﹤0.01% |
3,863
+2,499
| +183% | +$87.4K |
|
|
VTLE
4829
CALL
DELISTED
Vital Energy
VTLE
| $122K | ﹤0.01% |
83,800
+32,200
| +62% | +$1.99M |
|
4830
PUT
Wendy's
WEN
$1.46B
| $122K | ﹤0.01% |
5,400
-33,700
| -86% | -$720K |
|
|
XXII
4831
PUT
22nd Century Group
XXII
$1.28M
| – | – |
0
| – | – |
|
|
MODN
4832
DELISTED
MODEL N, INC.
MODN
| $122K | ﹤0.01% |
+3,019
| New | +$114K |
|
|
TUZ
4833
PUT
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $122K | ﹤0.01% |
1,400
+1,100
| +367% | +$95.9K |
|
4834
CALL
Global Partners
GLP
$1.65B
| $121K | ﹤0.01% |
3,500
-4,700
| -57% | -$145K |
|
4835
PUT
Patterson-UTI
PTEN
$3.54B
| $121K | ﹤0.01% |
7,200
+1,000
| +16% | +$16.5K |
|
4836
CALL
RB Global
RBA
$21.5B
| $121K | ﹤0.01% |
2,100
+1,100
| +110% | +$64K |
|
|
SAND
4837
PUT
DELISTED
Sandstorm Gold
SAND
| $121K | ﹤0.01% |
23,100
-36,500
| -61% | -$186K |
|
4838
ProShares VIX Mid-Term Futures ETF
VIXM
$56.8M
| $121K | ﹤0.01% |
4,018
-12,092
| -75% | -$395K |
|
4839
CALL
Aqua Metals
AQMS
$9.78M
| $120K | ﹤0.01% |
482
+110
| +30% | +$16.8K |
|
4840
BJ's Restaurants
BJRI
$1.47B
| $120K | ﹤0.01% |
4,560
+1,276
| +39% | +$37.3K |
|
4841
PUT
Pathward Financial
CASH
$1.88B
| $120K | ﹤0.01% |
2,800
| – | – |
|
4842
CALL
Clearwater Paper
CLW
$349M
| $120K | ﹤0.01% |
3,200
+2,800
| +700% | +$109K |
|
|
CMA
4843
PUT
DELISTED
Comerica
CMA
| $120K | ﹤0.01% |
1,800
-26,900
| -94% | -$1.86M |
|
|
CVAC
4844
DELISTED
CureVac
CVAC
| $120K | ﹤0.01% |
+19,922
| New | +$147K |
|
4845
PUT
Greif
GEF
$4.95B
| $120K | ﹤0.01% |
1,800
-4,700
| -72% | -$317K |
|
4846
PUT
Genworth Financial
GNW
$3.86B
| $120K | ﹤0.01% |
22,700
+600
| +3% | +$2.82K |
|
4847
iShares Core MSCI Emerging Markets ETF
IEMG
$144B
| $120K | ﹤0.01% |
2,574
-2,463
| -49% | -$112K |
|
4848
CALL
InvenTrust Properties
IVT
$2.79B
| $120K | ﹤0.01% |
5,100
+2,200
| +76% | +$52.5K |
|
|
LGHL
4849
CALL
Lion Group Holding
LGHL
$997K
| $120K | ﹤0.01% |
1
| – | – |
|
4850
MidCap Financial Investment
MFIC
$801M
| $120K | ﹤0.01% |
+10,560
| New | +$122K |
|
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.