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 | |
|---|---|---|---|---|---|---|
4701
CALL
Savara
SVRA
$1.08B
| $191K | ﹤0.01% |
47,500
+25,700
| +118% | +$114K |
|
4702
PUT
Vishay Intertechnology
VSH
$4.6B
| $191K | ﹤0.01% |
8,600
-2,700
| -24% | -$61K |
|
4703
PUT
Woodward
WWD
$23B
| $191K | ﹤0.01% |
1,100
+900
| +450% | +$153K |
|
4704
ProShares Ultra Dow30
DDM
$524M
| $190K | ﹤0.01% |
4,592
-15,840
| -78% | -$652K |
|
|
OGI
4705
CALL
Organigram Holdings
OGI
$131M
| $190K | ﹤0.01% |
123,900
+83,100
| +204% | +$151K |
|
4706
CALL
The RealReal
REAL
$1.41B
| $190K | ﹤0.01% |
59,600
-13,800
| -19% | -$50.9K |
|
4707
PUT
UFP Industries
UFPI
$4.95B
| $190K | ﹤0.01% |
1,700
-400
| -19% | -$46.5K |
|
4708
Applied Optoelectronics
AAOI
$6.14B
| $189K | ﹤0.01% |
22,908
-24,766
| -52% | -$272K |
|
4709
Marriott International
MAR
$100B
| $189K | ﹤0.01% |
+782
| New | +$188K |
|
4710
CALL
Casella Waste Systems
CWST
$5.76B
| $188K | ﹤0.01% |
1,900
-200
| -10% | -$19.3K |
|
|
CMRC
4711
CALL
Commerce.com Inc Series 1
CMRC
$272M
| $187K | ﹤0.01% |
23,300
-19,000
| -45% | -$136K |
|
4712
Comtech Telecommunications
CMTL
$49.7M
| $187K | ﹤0.01% |
61,814
+31,760
| +106% | +$75.2K |
|
4713
Corsair Gaming
CRSR
$1.1B
| $187K | ﹤0.01% |
+17,022
| New | +$193K |
|
4714
PUT
Lindblad Expeditions
LIND
$1.95B
| $187K | ﹤0.01% |
19,400
+12,500
| +181% | +$96.8K |
|
|
PDM
4715
CALL
Piedmont Realty Trust
PDM
$1.24B
| $187K | ﹤0.01% |
25,800
+2,000
| +8% | +$13.9K |
|
4716
PUT
Prothena Corp
PRTA
$448M
| $187K | ﹤0.01% |
9,100
-12,400
| -58% | -$268K |
|
4717
PUT
SandRidge Energy
SD
$503M
| $187K | ﹤0.01% |
14,500
-12,600
| -46% | -$174K |
|
4718
Brunswick
BC
$5.23B
| $186K | ﹤0.01% |
+2,564
| New | +$209K |
|
|
EXK
4719
Endeavour Silver
EXK
$2.24B
| $186K | ﹤0.01% |
52,988
-13,082
| -20% | -$42.5K |
|
4720
PUT
Hudbay
HBM
$9.76B
| $186K | ﹤0.01% |
20,600
+15,300
| +289% | +$133K |
|
4721
LGI Homes
LGIH
$1.35B
| $186K | ﹤0.01% |
+2,087
| New | +$201K |
|
4722
PUT
NCR Atleos
NATL
$3.51B
| $186K | ﹤0.01% |
6,900
-62,900
| -90% | -$1.53M |
|
|
SAND
4723
PUT
DELISTED
Sandstorm Gold
SAND
| $186K | ﹤0.01% |
34,300
+7,100
| +26% | +$39.3K |
|
4724
CALL
SkyWater Technology
SKYT
$1.5B
| $186K | ﹤0.01% |
24,400
-12,800
| -34% | -$111K |
|
4725
Toyota
TM
$228B
| $186K | ﹤0.01% |
912
-169
| -16% | -$37.4K |
|
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.