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 | |
|---|---|---|---|---|---|---|
|
SEMR
5451
PUT
DELISTED
Semrush
SEMR
| $93K | ﹤0.01% |
7,000
-400
| -5% | -$5.54K |
|
|
SLNO
5452
PUT
DELISTED
Soleno Therapeutics
SLNO
| $93K | ﹤0.01% |
2,300
+1,600
| +229% | +$67.8K |
|
5453
PUT
SEACOR Marine Holdings
SMHI
$256M
| $93K | ﹤0.01% |
6,900
+6,400
| +1,280% | +$83.3K |
|
5454
PUT
Xometry
XMTR
$4.73B
| $93K | ﹤0.01% |
8,100
-8,900
| -52% | -$140K |
|
5455
Xponential Fitness
XPOF
$270M
| $93K | ﹤0.01% |
5,982
-7,721
| -56% | -$95.2K |
|
|
IDEX
5456
CALL
DELISTED
Ideanomics, Inc. Common Stock
IDEX
| $93K | ﹤0.01% |
104,400
-5,500
| -5% | -$5.29K |
|
5457
CALL
Atlas Lithium Corp
ATLX
$79.6M
| $92K | ﹤0.01% |
8,900
+2,500
| +39% | +$35.7K |
|
|
BDN
5458
Brandywine Realty Trust
BDN
$520M
| $92K | ﹤0.01% |
20,715
-13,430
| -39% | -$61.2K |
|
5459
iShares MSCI Mexico ETF
EWW
$1.92B
| $92K | ﹤0.01% |
1,631
-25,541
| -94% | -$1.64M |
|
5460
REX FANG & Innovation Equity Premium Income ETF
FEPI
$648M
| $92K | ﹤0.01% |
+1,695
| New | +$91.8K |
|
5461
CALL
Quantum-Si Incorporated
QSI
$159M
| $92K | ﹤0.01% |
88,400
+36,900
| +72% | +$59.2K |
|
|
SFIX
5462
PUT
Stitch Fix
SFIX
$538M
| $92K | ﹤0.01% |
22,300
+300
| +1% | +$813 |
|
5463
PUT
Seanergy Maritime Holdings
SHIP
$381M
| $92K | ﹤0.01% |
9,400
-800
| -8% | -$8.31K |
|
|
SNBR
5464
CALL
DELISTED
Sleep Number
SNBR
| $92K | ﹤0.01% |
9,700
-10,900
| -53% | -$149K |
|
|
SVC
5465
PUT
Service Properties Trust
SVC
$1.04B
| $92K | ﹤0.01% |
3,600
-1,400
| -28% | -$40.3K |
|
5466
CALL
US Physical Therapy
USPH
$1.22B
| $92K | ﹤0.01% |
1,000
-2,800
| -74% | -$283K |
|
5467
CALL
VTEX
VTEX
$738M
| $92K | ﹤0.01% |
12,700
-5,700
| -31% | -$41.3K |
|
5468
PUT
Ambev
ABEV
$48.4B
| $91K | ﹤0.01% |
44,800
+21,100
| +89% | +$48.1K |
|
5469
CALL
Allison Transmission
ALSN
$9.51B
| $91K | ﹤0.01% |
1,200
-1,100
| -48% | -$84.3K |
|
5470
CALL
Aemetis
AMTX
$106M
| $91K | ﹤0.01% |
30,300
-35,800
| -54% | -$136K |
|
|
CAN
5471
PUT
Canaan Creative
CAN
$149M
| $91K | ﹤0.01% |
91,400
-105,200
| -54% | -$111K |
|
5472
Energizer
ENR
$1.44B
| $91K | ﹤0.01% |
+3,095
| New | +$89.4K |
|
5473
PUT
Haemonetics
HAE
$3.83B
| $91K | ﹤0.01% |
1,100
-1,600
| -59% | -$141K |
|
5474
CALL
Hamilton Insurance Group
HG
$3.56B
| $91K | ﹤0.01% |
+5,500
| New | +$84.1K |
|
5475
CALL
Hallador Energy
HNRG
$673M
| $91K | ﹤0.01% |
11,800
+300
| +3% | +$1.88K |
|
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.