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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7951
CALL
BeyondSpring
BYSI
$46.1M
| $4K | ﹤0.01% |
1,900
-2,000
| -51% | -$4.96K |
|
7952
CALL
China Automotive Systems
CAAS
$131M
| $4K | ﹤0.01% |
+1,200
| New | +$4.41K |
|
7953
Codexis
CDXS
$135M
| $4K | ﹤0.01% |
1,446
-33,504
| -96% | -$108K |
|
7954
Cenntro
CENN
$8.23M
| $4K | ﹤0.01% |
47
+46
| +4,600% | +$4.52K |
|
7955
PUT
Core Laboratories
CLB
$538M
| $4K | ﹤0.01% |
200
-600
| -75% | -$10.6K |
|
7956
iShares GSCI Commodity Dynamic Roll Strategy ETF
COMT
$1.19B
| $4K | ﹤0.01% |
165
-600
| -78% | -$16.4K |
|
|
CPRX
7957
PUT
DELISTED
Catalyst Pharmaceutical
CPRX
| $4K | ﹤0.01% |
300
-30,700
| -99% | -$478K |
|
7958
CALL
Cricut
CRCT
$936M
| $4K | ﹤0.01% |
+700
| New | +$4.2K |
|
|
7959
PUT
Cricut
CRCT
$936M
| $4K | ﹤0.01% |
800
+500
| +167% | +$3K |
|
7960
Corvus Pharmaceuticals
CRVS
$1.1B
| $4K | ﹤0.01% |
2,212
-7,134
| -76% | -$13.3K |
|
7961
CytomX Therapeutics
CTMX
$705M
| $4K | ﹤0.01% |
3,891
-2,173
| -36% | -$4.33K |
|
|
DDL
7962
CALL
Dingdong
DDL
$529M
| $4K | ﹤0.01% |
2,400
+400
| +20% | +$669 |
|
7963
CALL
DiaMedica Therapeutics
DMAC
$363M
| $4K | ﹤0.01% |
1,600
-100
| -6% | -$274 |
|
7964
Design Therapeutics
DSGN
$736M
| $4K | ﹤0.01% |
1,295
-3,724
| -74% | -$14.5K |
|
7965
CALL
Eastern Bankshares
EBC
$5.25B
| $4K | ﹤0.01% |
300
-6,800
| -96% | -$90.3K |
|
7966
iShares MSCI Chile ETF
ECH
$1.01B
| $4K | ﹤0.01% |
+180
| New | +$4.93K |
|
7967
PUT
Enovis
ENOV
$1.56B
| $4K | ﹤0.01% |
100
-14,900
| -99% | -$773K |
|
7968
Empire State Realty Trust
ESRT
$976M
| $4K | ﹤0.01% |
469
-1,870
| -80% | -$17.5K |
|
7969
CALL
Eve Holding
EVEX
$798M
| $4K | ﹤0.01% |
1,000
| – | – |
|
|
FARM
7970
DELISTED
Farmer Brothers
FARM
| $4K | ﹤0.01% |
1,631
-19,213
| -92% | -$59K |
|
7971
Fate Therapeutics
FATE
$281M
| $4K | ﹤0.01% |
1,482
-138
| -9% | -$604 |
|
7972
CapForce IBD 50 ETF
FFTY
$80.2M
| $4K | ﹤0.01% |
145
-158
| -52% | -$4.31K |
|
7973
FIGS
FIGS
$1.59B
| $4K | ﹤0.01% |
846
-58,680
| -99% | -$300K |
|
7974
Franklin FTSE Japan ETF
FLJP
$3.93B
| $4K | ﹤0.01% |
143
-557
| -80% | -$16.5K |
|
7975
PUT
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$542M
| $4K | ﹤0.01% |
100
| – | – |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.