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 | |
|---|---|---|---|---|---|---|
5576
PUT
Insperity
NSP
$1.93B
| $82K | ﹤0.01% |
900
-500
| -36% | -$50.6K |
|
5577
PUT
QuinStreet
QNST
$890M
| $82K | ﹤0.01% |
5,000
-19,100
| -79% | -$331K |
|
5578
PUT
ARS Pharmaceuticals
SPRY
$509M
| $82K | ﹤0.01% |
9,700
+4,600
| +90% | +$40.8K |
|
|
SWTX
5579
CALL
DELISTED
SpringWorks Therapeutics
SWTX
| $82K | ﹤0.01% |
2,200
+200
| +10% | +$8.42K |
|
5580
TaskUs
TASK
$556M
| $82K | ﹤0.01% |
6,161
+5,440
| +755% | +$70.1K |
|
|
UNIT
5581
CALL
Uniti Group
UNIT
$2.36B
| $82K | ﹤0.01% |
28,100
-46,000
| -62% | -$193K |
|
|
NAPA
5582
PUT
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $82K | ﹤0.01% |
11,600
+11,000
| +1,833% | +$88.5K |
|
|
WRK
5583
CALL
DELISTED
WestRock Company
WRK
| $82K | ﹤0.01% |
25,000
-4,600
| -16% | -$232K |
|
5584
CALL
Digital Turbine
APPS
$975M
| $81K | ﹤0.01% |
49,000
+33,400
| +214% | +$64.7K |
|
5585
CALL
AXT Inc
AXTI
$3.95B
| $81K | ﹤0.01% |
24,200
-4,200
| -15% | -$14.7K |
|
5586
AZZ Inc
AZZ
$4.35B
| $81K | ﹤0.01% |
+1,051
| New | +$82.2K |
|
5587
Booz Allen Hamilton
BAH
$8.39B
| $81K | ﹤0.01% |
+529
| New | +$79.3K |
|
5588
Capricor Therapeutics
CAPR
$223M
| $81K | ﹤0.01% |
17,169
-8,028
| -32% | -$44.8K |
|
|
CODX
5589
Co-Diagnostics
CODX
$5.31M
| $81K | ﹤0.01% |
2,161
+1,775
| +460% | +$64.6K |
|
5590
Imperial Petroleum
IMPP
$213M
| $81K | ﹤0.01% |
20,942
-12,385
| -37% | -$45.8K |
|
|
ODV
5591
DELISTED
Osisko Development Corp
ODV
| $81K | ﹤0.01% |
43,975
+42,383
| +2,662% | +$89.7K |
|
5592
CALL
Grupo Aeroportuario Centro Norte
OMAB
$5.16B
| $81K | ﹤0.01% |
1,200
+200
| +20% | +$15.9K |
|
5593
CALL
Rekor Systems
REKR
$85.8M
| $81K | ﹤0.01% |
52,800
-1,400
| -3% | -$2.45K |
|
5594
CALL
SIGA Technologies
SIGA
$235M
| $81K | ﹤0.01% |
10,800
-37,700
| -78% | -$307K |
|
|
SVC
5595
Service Properties Trust
SVC
$1.04B
| $81K | ﹤0.01% |
3,167
+595
| +23% | +$17.1K |
|
5596
PUT
Smith & Wesson
SWBI
$651M
| $81K | ﹤0.01% |
5,700
-37,900
| -87% | -$622K |
|
5597
CALL
Talkspace
TALK
$874M
| $81K | ﹤0.01% |
35,600
-200
| -0.6% | -$575 |
|
5598
PUT
United Parks & Resorts
PRKS
$2.1B
| $81K | ﹤0.01% |
1,500
-4,100
| -73% | -$214K |
|
|
CDMO
5599
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $81K | ﹤0.01% |
11,458
-15,705
| -58% | -$120K |
|
5600
DT Midstream
DTM
$14.1B
| $80K | ﹤0.01% |
+1,139
| New | +$74.8K |
|
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.