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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6151
CALL
Cibus
CBUS
$147M
| $56K | ﹤0.01% |
+2,500
| New | +$46K |
|
|
CRESY
6152
CALL
Cresud
CRESY
$795M
| $56K | ﹤0.01% |
6,353
+504
| +9% | +$4.28K |
|
|
DADA
6153
CALL
DELISTED
Dada Nexus
DADA
| $56K | ﹤0.01% |
27,400
+12,100
| +79% | +$25.9K |
|
6154
PUT
DocGo
DCGO
$64.3M
| $56K | ﹤0.01% |
13,900
+7,500
| +117% | +$28.3K |
|
6155
PUT
Gladstone Investment Corp
GAIN
$643M
| $56K | ﹤0.01% |
4,000
-5,400
| -57% | -$76.7K |
|
6156
CALL
Immunome
IMNM
$2.58B
| $56K | ﹤0.01% |
2,300
-4,900
| -68% | -$99.4K |
|
6157
iShares S&P India Nifty 50 Index Fund
INDY
$562M
| $56K | ﹤0.01% |
1,120
-1,120
| -50% | -$55.9K |
|
6158
CALL
Independence Realty Trust
IRT
$3.92B
| $56K | ﹤0.01% |
3,500
+1,900
| +119% | +$29K |
|
6159
PUT
American Century Diversified Corporate Bond ETF
KORP
$869M
| $56K | ﹤0.01% |
600
-800
| -57% | -$36.9K |
|
6160
PUT
Loop Industries
LOOP
$35.3M
| $56K | ﹤0.01% |
20,100
+18,900
| +1,575% | +$60.6K |
|
6161
CALL
Nomad Foods
NOMD
$1.66B
| $56K | ﹤0.01% |
2,900
+2,500
| +625% | +$46.1K |
|
|
ADAM
6162
Adamas Trust
ADAM
$815M
| $56K | ﹤0.01% |
7,797
+4,033
| +107% | +$30.7K |
|
|
PTN
6163
CALL
Palatin Technologies
PTN
$13.7M
| $56K | ﹤0.01% |
608
+598
| +5,980% | +$87.7K |
|
6164
FreightCar America
RAIL
$261M
| $56K | ﹤0.01% |
14,677
+12,305
| +519% | +$36.7K |
|
6165
CALL
United States Gasoline Fund
UGA
$142M
| $56K | ﹤0.01% |
800
-5,500
| -87% | -$361K |
|
6166
W&T Offshore
WTI
$534M
| $56K | ﹤0.01% |
+21,343
| New | +$61K |
|
|
CGAU
6167
CALL
Centerra Gold
CGAU
$3.36B
| $55K | ﹤0.01% |
9,400
-2,000
| -18% | -$10.8K |
|
6168
CALL
Compass Diversified
CODI
$758M
| $55K | ﹤0.01% |
2,300
-2,900
| -56% | -$66.1K |
|
6169
CALL
Castle Biosciences
CSTL
$855M
| $55K | ﹤0.01% |
2,500
+2,200
| +733% | +$47.9K |
|
6170
PUT
Community Trust Bancorp
CTBI
$1.42B
| $55K | ﹤0.01% |
1,300
| – | – |
|
6171
Edgewise Therapeutics
EWTX
$4.13B
| $55K | ﹤0.01% |
+3,025
| New | +$48.1K |
|
|
GOOD
6172
PUT
Gladstone Commercial Corp
GOOD
$605M
| $55K | ﹤0.01% |
4,000
-1,300
| -25% | -$16.9K |
|
6173
CALL
LiveWire
LVWR
$371M
| $55K | ﹤0.01% |
7,700
-13,200
| -63% | -$127K |
|
|
NTST
6174
CALL
NETSTREIT Corp
NTST
$2.09B
| $55K | ﹤0.01% |
3,000
| – | – |
|
6175
CALL
OFS Capital
OFS
$45M
| $55K | ﹤0.01% |
5,600
-11,000
| -66% | -$122K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.