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 | |
|---|---|---|---|---|---|---|
|
CIO
8026
CALL
DELISTED
City Office REIT
CIO
| $5K | ﹤0.01% |
700
-7,000
| -91% | -$67.3K |
|
|
CIO
8027
DELISTED
City Office REIT
CIO
| $5K | ﹤0.01% |
+673
| New | +$6.47K |
|
|
CIVI
8028
DELISTED
Civitas Resources
CIVI
| $5K | ﹤0.01% |
100
-3,237
| -97% | -$209K |
|
8029
CNA Financial
CNA
$15B
| $5K | ﹤0.01% |
133
-31
| -19% | -$1.27K |
|
|
CSR
8030
CALL
Centerspace
CSR
$941M
| $5K | ﹤0.01% |
100
| – | – |
|
8031
CALL
Torrid Holdings
CURV
$271M
| $5K | ﹤0.01% |
1,900
-10,900
| -85% | -$44.5K |
|
8032
CALL
Cousins Properties
CUZ
$5.22B
| $5K | ﹤0.01% |
+200
| New | +$4.88K |
|
|
DSL
8033
CALL
DoubleLine Income Solutions Fund
DSL
$1.23B
| $5K | ﹤0.01% |
500
| – | – |
|
|
EMX
8034
CALL
DELISTED
EMX Royalty
EMX
| $5K | ﹤0.01% |
2,900
+2,300
| +383% | +$4.22K |
|
8035
PUT
Evolus
EOLS
$410M
| $5K | ﹤0.01% |
700
-2,300
| -77% | -$17.8K |
|
8036
PUT
Fennec Pharmaceuticals
FENC
$345M
| $5K | ﹤0.01% |
600
-87,300
| -99% | -$772K |
|
8037
CALL
Foghorn Therapeutics
FHTX
$301M
| $5K | ﹤0.01% |
800
| – | – |
|
8038
Forestar Group
FOR
$1.5B
| $5K | ﹤0.01% |
338
-267
| -44% | -$3.54K |
|
8039
CALL
Fathom Holdings
FTHM
$28.5M
| $5K | ﹤0.01% |
+1,400
| New | +$6.61K |
|
8040
CALL
Galectin Therapeutics
GALT
$223M
| $5K | ﹤0.01% |
4,600
-11,400
| -71% | -$15.2K |
|
|
GAN
8041
PUT
DELISTED
GAN Ltd
GAN
| $5K | ﹤0.01% |
3,400
-2,700
| -44% | -$4.54K |
|
8042
ProShares UltraShort Gold
GLL
$128M
| $5K | ﹤0.01% |
41
-1,862
| -98% | -$257K |
|
8043
PUT
Gentex
GNTX
$5.12B
| $5K | ﹤0.01% |
200
-2,200
| -92% | -$58.7K |
|
|
GRFS
8044
CALL
Grifois
GRFS
$5.44B
| $5K | ﹤0.01% |
700
-62,700
| -99% | -$456K |
|
8045
Goldman Sachs
GS
$305B
| $5K | ﹤0.01% |
16
-12,903
| -100% | -$4.49M |
|
8046
PUT
Helios Technologies
HLIO
$2.56B
| $5K | ﹤0.01% |
100
-1,900
| -95% | -$102K |
|
8047
CALL
HNI Corp
HNI
$3.17B
| $5K | ﹤0.01% |
200
-300
| -60% | -$8.53K |
|
8048
CALL
Humacyte
HUMA
$170M
| $5K | ﹤0.01% |
2,400
-1,700
| -41% | -$5.16K |
|
|
IAS
8049
DELISTED
Integral Ad Science
IAS
| $5K | ﹤0.01% |
+658
| New | +$5.58K |
|
8050
CALL
IRIDEX
IRIX
$15.3M
| $5K | ﹤0.01% |
2,600
-300
| -10% | -$667 |
|
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.