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 | |
|---|---|---|---|---|---|---|
2401
PUT
AutoNation
AN
$6.97B
| $1.63M | ﹤0.01% |
10,200
-112,100
| -92% | -$18.3M |
|
2402
PUT
FS KKR Capital
FSK
$2.98B
| $1.63M | ﹤0.01% |
82,400
+23,100
| +39% | +$454K |
|
2403
PUT
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.9B
| $1.62M | ﹤0.01% |
54,700
-2,200
| -4% | -$64.3K |
|
2404
PUT
Genuine Parts
GPC
$17.1B
| $1.62M | ﹤0.01% |
11,700
+5,700
| +95% | +$850K |
|
2405
PUT
GlobalFoundries
GFS
$29.4B
| $1.62M | ﹤0.01% |
32,000
-4,600
| -13% | -$230K |
|
2406
Alpha Metallurgical Resources
AMR
$1.82B
| $1.62M | ﹤0.01% |
+5,764
| New | +$1.78M |
|
2407
Ingersoll Rand
IR
$33B
| $1.62M | ﹤0.01% |
+17,799
| New | +$1.64M |
|
|
MOMO
2408
CALL
Hello Group
MOMO
$869M
| $1.61M | ﹤0.01% |
263,800
-9,900
| -4% | -$57.8K |
|
2409
Hecla Mining
HL
$10.2B
| $1.61M | ﹤0.01% |
332,713
-81,391
| -20% | -$434K |
|
2410
PUT
Omega Healthcare
OHI
$15.4B
| $1.61M | ﹤0.01% |
47,100
-1,400
| -3% | -$44.1K |
|
2411
CALL
Legacy Housing
LEGH
$630M
| $1.61M | ﹤0.01% |
70,300
-61,800
| -47% | -$1.36M |
|
2412
CALL
Eos Energy Enterprises
EOSE
$1.23B
| $1.61M | ﹤0.01% |
1,268,700
-83,700
| -6% | -$69.2K |
|
2413
PUT
Western Union
WU
$2.57B
| $1.61M | ﹤0.01% |
131,800
-47,100
| -26% | -$612K |
|
2414
PUT
BlackLine
BL
$1.69B
| $1.61M | ﹤0.01% |
33,200
+20,900
| +170% | +$1.15M |
|
2415
CALL
Sturm, Ruger & Co
RGR
$610M
| $1.61M | ﹤0.01% |
38,600
+16,200
| +72% | +$718K |
|
2416
PUT
Intellia Therapeutics
NTLA
$1.5B
| $1.61M | ﹤0.01% |
71,800
-51,400
| -42% | -$1.22M |
|
2417
iShares China Large-Cap ETF
FXI
$4.31B
| $1.6M | ﹤0.01% |
+61,786
| New | +$1.62M |
|
2418
CALL
Amkor Technology
AMKR
$16.1B
| $1.6M | ﹤0.01% |
40,000
-21,000
| -34% | -$695K |
|
2419
General Mills
GIS
$19.2B
| $1.6M | ﹤0.01% |
25,292
-117,917
| -82% | -$8.1M |
|
2420
CALL
Procore
PCOR
$6.46B
| $1.6M | ﹤0.01% |
24,100
-12,100
| -33% | -$840K |
|
2421
CALL
Itaú Unibanco
ITUB
$91.3B
| $1.6M | ﹤0.01% |
309,649
+200,428
| +184% | +$1.1M |
|
2422
PUT
Telephone and Data Systems
TDS
$3.91B
| $1.6M | ﹤0.01% |
77,000
+36,500
| +90% | +$660K |
|
2423
PUT
Alcon
ALC
$33.1B
| $1.59M | ﹤0.01% |
17,900
+11,100
| +163% | +$947K |
|
2424
CALL
Stride
LRN
$3.69B
| $1.59M | ﹤0.01% |
22,600
-29,800
| -57% | -$1.99M |
|
2425
PUT
Western Midstream Partners
WES
$19.6B
| $1.59M | ﹤0.01% |
40,100
-140,500
| -78% | -$5.17M |
|
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.