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 | |
|---|---|---|---|---|---|---|
5551
United States Oil Fund
USO
$2.15B
| $84K | ﹤0.01% |
1,063
-29,873
| -97% | -$2.32M |
|
5552
CALL
Agilysys
AGYS
$2.97B
| $83K | ﹤0.01% |
+800
| New | +$71.8K |
|
5553
ARK Autonomous Technology & Robotics ETF
ARKQ
$1.9B
| $83K | ﹤0.01% |
+1,507
| New | +$81.4K |
|
5554
PUT
BlueLinx
BXC
$422M
| $83K | ﹤0.01% |
900
-100
| -10% | -$10.6K |
|
5555
GrowGeneration
GRWG
$86.5M
| $83K | ﹤0.01% |
39,031
-41,499
| -52% | -$105K |
|
|
HEES
5556
PUT
DELISTED
H&E Equipment Services
HEES
| $83K | ﹤0.01% |
1,900
-5,600
| -75% | -$287K |
|
5557
CALL
Innoviva
INVA
$1.55B
| $83K | ﹤0.01% |
5,100
+4,200
| +467% | +$65.2K |
|
5558
PUT
Janux Therapeutics
JANX
$925M
| $83K | ﹤0.01% |
2,000
-13,400
| -87% | -$629K |
|
5559
PUT
Lamar Advertising Co
LAMR
$16.2B
| $83K | ﹤0.01% |
700
-18,600
| -96% | -$2.16M |
|
5560
PUT
Grand Canyon Education
LOPE
$3.85B
| $83K | ﹤0.01% |
600
+100
| +20% | +$13.8K |
|
5561
PUT
Paymentus
PAY
$4.29B
| $83K | ﹤0.01% |
4,400
+3,600
| +450% | +$70.5K |
|
|
PBT
5562
PUT
Permian Basin Royalty Trust
PBT
$1.38B
| $83K | ﹤0.01% |
7,400
-10,300
| -58% | -$125K |
|
|
PLYA
5563
DELISTED
Playa Hotels & Resorts
PLYA
| $83K | ﹤0.01% |
9,953
+116
| +1% | +$1.02K |
|
5564
PUT
RLX Technology
RLX
$2.47B
| $83K | ﹤0.01% |
45,200
+9,700
| +27% | +$18.3K |
|
|
STKL
5565
CALL
DELISTED
SunOpta
STKL
| $83K | ﹤0.01% |
15,400
+14,700
| +2,100% | +$86.4K |
|
5566
PUT
Trinity Industries
TRN
$2.48B
| $83K | ﹤0.01% |
2,800
-2,400
| -46% | -$69.9K |
|
5567
ProShares UltraPro Russell2000
URTY
$322M
| $83K | ﹤0.01% |
+1,931
| New | +$84.4K |
|
5568
Alto Ingredients
ALTO
$369M
| $82K | ﹤0.01% |
56,861
-21,010
| -27% | -$36.3K |
|
5569
CALL
Autohome
ATHM
$2.67B
| $82K | ﹤0.01% |
3,000
-400
| -12% | -$10.8K |
|
5570
Cabot Corp
CBT
$4.54B
| $82K | ﹤0.01% |
897
+281
| +46% | +$27.2K |
|
5571
CALL
CryoPort
CYRX
$761M
| $82K | ﹤0.01% |
12,000
+4,000
| +50% | +$53.9K |
|
5572
Eos Energy Enterprises
EOSE
$1.22B
| $82K | ﹤0.01% |
+64,659
| New | +$53.4K |
|
5573
National Beverage
FIZZ
$2.96B
| $82K | ﹤0.01% |
+1,619
| New | +$75.7K |
|
5574
CALL
Farmers National Banc Corp
FMNB
$939M
| $82K | ﹤0.01% |
6,600
+5,400
| +450% | +$66.4K |
|
5575
PUT
Immunome
IMNM
$2.58B
| $82K | ﹤0.01% |
6,800
+6,200
| +1,033% | +$97K |
|
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.