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 | |
|---|---|---|---|---|---|---|
7701
CALL
Toro Corp
TORO
$175M
| $7K | ﹤0.01% |
1,900
+1,600
| +533% | +$7.02K |
|
|
UMH
7702
CALL
UMH Properties
UMH
$1.32B
| $7K | ﹤0.01% |
500
+200
| +67% | +$3.11K |
|
7703
PUT
Upland Software
UPLD
$12.4M
| $7K | ﹤0.01% |
290
+100
| +53% | +$2.63K |
|
7704
CALL
NCR Voyix
VYX
$1.11B
| $7K | ﹤0.01% |
3,700
-13,100
| -78% | -$165K |
|
7705
CALL
Wyndham Hotels & Resorts
WH
$5.53B
| $7K | ﹤0.01% |
100
-400
| -80% | -$28.8K |
|
7706
PUT
Beyond Air
XAIR
$3.75M
| $7K | ﹤0.01% |
36
+3
| +9% | +$1.49K |
|
|
XNET
7707
Xunlei
XNET
$359M
| $7K | ﹤0.01% |
4,638
+4,632
| +77,200% | +$7.74K |
|
7708
PUT
Dentsply Sirona
XRAY
$2.64B
| $7K | ﹤0.01% |
300
-1,900
| -86% | -$54.5K |
|
7709
PUT
York Water
YORW
$503M
| $7K | ﹤0.01% |
200
| – | – |
|
7710
CALL
Ibotta
IBTA
$636M
| $7K | ﹤0.01% |
+100
| New | +$9.32K |
|
|
SMC
7711
CALL
Summit Midstream
SMC
$418M
| $7K | ﹤0.01% |
200
-900
| -82% | -$28.3K |
|
|
CDMO
7712
PUT
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $7K | ﹤0.01% |
1,000
-10,800
| -92% | -$82.6K |
|
|
TWOU
7713
PUT
DELISTED
2U Inc
TWOU
| $7K | ﹤0.01% |
+1,400
| New | +$12.1K |
|
7714
Acurx Pharmaceuticals
ACXP
$6.4M
| $6K | ﹤0.01% |
146
-390
| -73% | -$17.1K |
|
7715
ADC Therapeutics
ADCT
$154M
| $6K | ﹤0.01% |
1,938
-12,817
| -87% | -$50.9K |
|
7716
Aegon
AEG
$13.6B
| $6K | ﹤0.01% |
1,009
-3,624
| -78% | -$22.9K |
|
|
AFCG
7717
PUT
AFC Gamma
AFCG
$61.4M
| $6K | ﹤0.01% |
731
+585
| +401% | +$4.82K |
|
|
ALE
7718
DELISTED
Allete
ALE
| $6K | ﹤0.01% |
100
-808
| -89% | -$49.8K |
|
|
ALE
7719
PUT
DELISTED
Allete
ALE
| $6K | ﹤0.01% |
+100
| New | +$6.16K |
|
7720
Alarm.com
ALRM
$2.62B
| $6K | ﹤0.01% |
101
-690
| -87% | -$45.6K |
|
7721
PUT
Apogee Enterprises
APOG
$859M
| $6K | ﹤0.01% |
100
| – | – |
|
7722
PUT
Digital Turbine
APPS
$1.05B
| $6K | ﹤0.01% |
4,000
-82,100
| -95% | -$159K |
|
7723
CALL
Alpha Pro Tech
APT
$51.3M
| $6K | ﹤0.01% |
1,100
-3,500
| -76% | -$19.5K |
|
7724
Apyx Medical
APYX
$167M
| $6K | ﹤0.01% |
4,564
-4,156
| -48% | -$6.13K |
|
|
ARBK
7725
CALL
Argo Blockchain
ARBK
$44.8M
| $6K | ﹤0.01% |
+26
| New | +$7.93K |
|
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.