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 | |
|---|---|---|---|---|---|---|
4176
Cooper-Standard Automotive
CPS
$517M
| $207K | ﹤0.01% |
22,897
+4,956
| +28% | +$35.1K |
|
4177
CALL
Blue Owl Capital
OBDC
$5.35B
| $207K | ﹤0.01% |
18,000
-9,100
| -34% | -$109K |
|
|
ACH
4178
Accendra Health
ACH
$254M
| $207K | ﹤0.01% |
+10,615
| New | +$207K |
|
4179
PUT
ProPetro Holding
PUMP
$1.25B
| $207K | ﹤0.01% |
20,000
+8,100
| +68% | +$85.3K |
|
4180
CALL
SkyWater Technology
SKYT
$1.5B
| $207K | ﹤0.01% |
29,200
-19,800
| -40% | -$167K |
|
4181
Tradeweb Markets
TW
$23B
| $207K | ﹤0.01% |
3,192
-8,683
| -73% | -$510K |
|
4182
Viper Energy
VNOM
$8.43B
| $207K | ﹤0.01% |
6,526
-2,290
| -26% | -$73.9K |
|
4183
CALL
CoreCivic
CXW
$2.94B
| $206K | ﹤0.01% |
17,900
-12,100
| -40% | -$134K |
|
4184
CALL
DocGo
DCGO
$64.2M
| $206K | ﹤0.01% |
29,200
-84,600
| -74% | -$710K |
|
4185
WisdomTree Emerging Markets SmallCap Dividend Fund
DGS
$1.66B
| $206K | ﹤0.01% |
4,704
+3,885
| +474% | +$165K |
|
4186
PUT
Funko
FNKO
$346M
| $206K | ﹤0.01% |
18,900
+300
| +2% | +$4.21K |
|
|
SVM
4187
Silvercorp Metals
SVM
$2.02B
| $206K | ﹤0.01% |
69,723
-13,451
| -16% | -$36.5K |
|
4188
CALL
United Bankshares
UBSI
$6.69B
| $206K | ﹤0.01% |
5,100
+1,900
| +59% | +$77K |
|
4189
CALL
AXIS Capital
AXS
$7.81B
| $205K | ﹤0.01% |
3,800
+3,700
| +3,700% | +$200K |
|
4190
PUT
Cogent Communications
CCOI
$635M
| $205K | ﹤0.01% |
3,600
+2,500
| +227% | +$137K |
|
4191
CALL
Genco Shipping & Trading
GNK
$1.1B
| $205K | ﹤0.01% |
13,400
-23,000
| -63% | -$333K |
|
4192
CALL
Pangaea Logistics
PANL
$484M
| $205K | ﹤0.01% |
39,900
+24,200
| +154% | +$120K |
|
4193
CALL
Portland General Electric
POR
$5.82B
| $205K | ﹤0.01% |
4,200
-2,400
| -36% | -$111K |
|
4194
CALL
Vir Biotechnology
VIR
$1.46B
| $205K | ﹤0.01% |
8,100
-3,900
| -33% | -$95.6K |
|
|
CPRX
4195
DELISTED
Catalyst Pharmaceutical
CPRX
| $204K | ﹤0.01% |
11,001
+2,925
| +36% | +$45K |
|
4196
Delek Logistics
DKL
$3.12B
| $204K | ﹤0.01% |
4,517
-10,555
| -70% | -$540K |
|
|
CBIO
4197
Crescent Biopharma
CBIO
$546M
| $204K | ﹤0.01% |
676
+654
| +2,973% | +$96.4K |
|
4198
PUT
Gossamer Bio
GOSS
$101M
| $204K | ﹤0.01% |
94,400
+90,000
| +2,045% | +$741K |
|
4199
CALL
Summit Therapeutics
SMMT
$10.2B
| $204K | ﹤0.01% |
48,000
+26,400
| +122% | +$48K |
|
4200
CALL
MaxLinear
MXL
$5.19B
| $203K | ﹤0.01% |
6,000
-200
| -3% | -$6.78K |
|
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.