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 | |
|---|---|---|---|---|---|---|
5851
Arch Capital
ACGL
$34.3B
| $62K | ﹤0.01% |
+616
| New | +$59.9K |
|
5852
Accel Entertainment
ACEL
$978M
| $62K | ﹤0.01% |
6,045
-488
| -7% | -$5.17K |
|
|
BRY
5853
CALL
DELISTED
Berry Corp
BRY
| $62K | ﹤0.01% |
9,600
+4,000
| +71% | +$29.8K |
|
|
KYNB
5854
PUT
Kyntra Bio
KYNB
$27.2M
| $62K | ﹤0.01% |
2,824
+1,296
| +85% | +$40K |
|
5855
Federated Hermes
FHI
$4.55B
| $62K | ﹤0.01% |
+1,896
| New | +$63.6K |
|
5856
Fossil Group
FOSL
$293M
| $62K | ﹤0.01% |
+43,192
| New | +$49.1K |
|
|
GAMB
5857
CALL
DELISTED
Gambling.com
GAMB
| $62K | ﹤0.01% |
7,600
+6,600
| +660% | +$55.7K |
|
|
GOOD
5858
CALL
Gladstone Commercial Corp
GOOD
$605M
| $62K | ﹤0.01% |
4,400
+1,500
| +52% | +$20.9K |
|
5859
PUT
ManpowerGroup
MAN
$2.44B
| $62K | ﹤0.01% |
900
-800
| -47% | -$59.2K |
|
5860
CALL
Microvision
MVIS
$93.2M
| $62K | ﹤0.01% |
58,800
+35,200
| +149% | +$46.3K |
|
|
SVC
5861
CALL
Service Properties Trust
SVC
$1.04B
| $62K | ﹤0.01% |
2,420
-900
| -27% | -$25.9K |
|
5862
PUT
TaskUs
TASK
$556M
| $62K | ﹤0.01% |
4,700
-1,000
| -18% | -$12.9K |
|
|
TPIC
5863
DELISTED
TPI Composites
TPIC
| $62K | ﹤0.01% |
15,672
-12,572
| -45% | -$48.3K |
|
|
NARI
5864
PUT
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $62K | ﹤0.01% |
1,300
-16,400
| -93% | -$727K |
|
5865
CALL
American Financial Group
AFG
$11.8B
| $61K | ﹤0.01% |
+500
| New | +$64.3K |
|
5866
CALL
Commercial Vehicle Group
CVGI
$154M
| $61K | ﹤0.01% |
+12,600
| New | +$71.4K |
|
5867
PUT
Gladstone Investment Corp
GAIN
$643M
| $61K | ﹤0.01% |
4,400
+400
| +10% | +$5.62K |
|
5868
Gladstone Capital
GLAD
$422M
| $61K | ﹤0.01% |
2,629
-504
| -16% | -$11K |
|
5869
CALL
Nomura Holdings
NMR
$28.3B
| $61K | ﹤0.01% |
10,600
-100
| -0.9% | -$593 |
|
5870
CALL
Old Republic International
ORI
$10.5B
| $61K | ﹤0.01% |
2,000
-8,700
| -81% | -$266K |
|
5871
CALL
One Stop Systems
OSS
$303M
| $61K | ﹤0.01% |
25,600
-6,700
| -21% | -$17.8K |
|
5872
CALL
Reinsurance Group of America
RGA
$15.5B
| $61K | ﹤0.01% |
300
-4,800
| -94% | -$959K |
|
5873
Regenxbio
RGNX
$620M
| $61K | ﹤0.01% |
+5,255
| New | +$81.8K |
|
5874
SS&C Technologies
SSNC
$18.6B
| $61K | ﹤0.01% |
+980
| New | +$60.8K |
|
5875
CALL
Texas Capital Bancshares
TCBI
$4.3B
| $61K | ﹤0.01% |
+1,000
| New | +$59K |
|
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.