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 | |
|---|---|---|---|---|---|---|
2501
Organon & Co
OGN
$3.55B
| $1.48M | ﹤0.01% |
71,586
-64,832
| -48% | -$1.29M |
|
2502
Mativ Holdings
MATV
$448M
| $1.48M | ﹤0.01% |
87,266
+43,172
| +98% | +$770K |
|
2503
CALL
Blink Charging
BLNK
$75.2M
| $1.48M | ﹤0.01% |
538,900
+32,600
| +6% | +$93.1K |
|
2504
PUT
Crescent Energy
CRGY
$3.72B
| $1.47M | ﹤0.01% |
124,400
+54,000
| +77% | +$635K |
|
2505
CALL
SM Energy
SM
$7.96B
| $1.47M | ﹤0.01% |
34,100
+5,900
| +21% | +$290K |
|
2506
Autodesk
ADSK
$44.3B
| $1.47M | ﹤0.01% |
+5,951
| New | +$1.34M |
|
2507
PUT
Otis Worldwide
OTIS
$27.4B
| $1.47M | ﹤0.01% |
15,300
-6,100
| -29% | -$588K |
|
2508
CALL
Silicon Laboratories
SLAB
$7.15B
| $1.47M | ﹤0.01% |
13,300
| – | – |
|
2509
Telephone and Data Systems
TDS
$3.91B
| $1.47M | ﹤0.01% |
70,929
+11,349
| +19% | +$205K |
|
2510
PUT
Urban Outfitters
URBN
$5.99B
| $1.47M | ﹤0.01% |
35,800
+1,800
| +5% | +$74K |
|
2511
Structure Therapeutics
GPCR
$3.49B
| $1.47M | ﹤0.01% |
37,337
+14,372
| +63% | +$590K |
|
2512
PUT
Nano X Imaging
NNOX
$62.4M
| $1.47M | ﹤0.01% |
199,700
-31,700
| -14% | -$282K |
|
2513
PUT
Pegasystems
PEGA
$4.41B
| $1.46M | ﹤0.01% |
48,400
+43,600
| +908% | +$1.31M |
|
2514
CALL
Nokia
NOK
$50.8B
| $1.46M | ﹤0.01% |
387,100
-45,400
| -10% | -$168K |
|
2515
PUT
Molson Coors Class B
TAP
$7.68B
| $1.46M | ﹤0.01% |
28,800
-89,700
| -76% | -$5.19M |
|
2516
PUT
Zai Lab
ZLAB
$2.17B
| $1.46M | ﹤0.01% |
84,400
-5,900
| -7% | -$104K |
|
2517
CALL
HF Sinclair
DINO
$15.9B
| $1.46M | ﹤0.01% |
27,400
-8,100
| -23% | -$456K |
|
2518
CALL
Regal Rexnord
RRX
$14.2B
| $1.46M | ﹤0.01% |
10,800
+8,900
| +468% | +$1.38M |
|
2519
Boyd Gaming
BYD
$6.47B
| $1.46M | ﹤0.01% |
+26,413
| New | +$1.51M |
|
2520
CALL
W.P. Carey
WPC
$17.1B
| $1.46M | ﹤0.01% |
31,700
-66,800
| -68% | -$3.76M |
|
2521
PUT
Equifax
EFX
$20.3B
| $1.45M | ﹤0.01% |
6,000
-3,800
| -39% | -$907K |
|
2522
PUT
Kyndryl
KD
$2.66B
| $1.45M | ﹤0.01% |
55,300
+37,400
| +209% | +$897K |
|
2523
CALL
Altimmune
ALT
$539M
| $1.45M | ﹤0.01% |
218,600
-9,300
| -4% | -$68.6K |
|
2524
PUT
Arthur J. Gallagher & Co
AJG
$63.7B
| $1.45M | ﹤0.01% |
5,600
-32,700
| -85% | -$8.11M |
|
2525
CALL
Freshworks
FRSH
$2.84B
| $1.45M | ﹤0.01% |
114,200
+18,700
| +20% | +$280K |
|
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.