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 | |
|---|---|---|---|---|---|---|
1376
PUT
XPeng
XPEV
$11.8B
| $5.52M | ﹤0.01% |
753,600
-524,500
| -41% | -$4.14M |
|
1377
CALL
Neurocrine Biosciences
NBIX
$17.7B
| $5.52M | ﹤0.01% |
40,100
-8,800
| -18% | -$1.21M |
|
|
FL
1378
DELISTED
Foot Locker
FL
| $5.51M | ﹤0.01% |
221,002
+110,436
| +100% | +$2.63M |
|
|
EXE
1379
PUT
Expand Energy Corp
EXE
$21.9B
| $5.51M | ﹤0.01% |
67,000
-28,400
| -30% | -$2.51M |
|
1380
PUT
Baxter International
BAX
$11.6B
| $5.5M | ﹤0.01% |
164,600
-47,800
| -23% | -$1.76M |
|
1381
PUT
Pentair
PNR
$10.2B
| $5.5M | ﹤0.01% |
71,700
+30,400
| +74% | +$2.45M |
|
1382
CALL
Archer Aviation
ACHR
$3.64B
| $5.5M | ﹤0.01% |
1,561,400
+813,500
| +109% | +$3.02M |
|
1383
PUT
Wheaton Precious Metals
WPM
$50.6B
| $5.49M | ﹤0.01% |
104,700
+6,200
| +6% | +$331K |
|
1384
Snap
SNAP
$7.32B
| $5.48M | ﹤0.01% |
330,085
+163,196
| +98% | +$2.34M |
|
1385
Home Depot
HD
$332B
| $5.48M | ﹤0.01% |
+15,912
| New | +$5.43M |
|
1386
CALL
Packaging Corp of America
PKG
$22.7B
| $5.48M | ﹤0.01% |
30,000
-28,900
| -49% | -$5.26M |
|
1387
Albemarle
ALB
$13.5B
| $5.44M | ﹤0.01% |
56,960
-93,190
| -62% | -$11.1M |
|
1388
CALL
Public Service Enterprise Group
PEG
$39.8B
| $5.43M | ﹤0.01% |
73,700
-300
| -0.4% | -$21.3K |
|
1389
PUT
Sherwin-Williams
SHW
$78.3B
| $5.43M | ﹤0.01% |
18,200
-23,400
| -56% | -$7.24M |
|
1390
CALL
Ecolab
ECL
$75.6B
| $5.43M | ﹤0.01% |
22,800
-10,700
| -32% | -$2.47M |
|
1391
PUT
Gold Fields
GFI
$29.2B
| $5.41M | ﹤0.01% |
363,100
+192,200
| +112% | +$3.12M |
|
1392
CALL
United States Natural Gas Fund
UNG
$470M
| $5.41M | ﹤0.01% |
310,100
-379,300
| -55% | -$6.51M |
|
1393
CALL
Matador Resources
MTDR
$6.31B
| $5.39M | ﹤0.01% |
90,500
-27,400
| -23% | -$1.72M |
|
1394
CALL
Canadian Imperial Bank of Commerce
CM
$107B
| $5.38M | ﹤0.01% |
113,200
-191,500
| -63% | -$9.28M |
|
1395
PUT
Maplebear
CART
$9.92B
| $5.37M | ﹤0.01% |
167,000
-569,400
| -77% | -$19.6M |
|
1396
State Street Financial Select Sector SPDR ETF
XLF
$55.6B
| $5.35M | ﹤0.01% |
+130,252
| New | +$5.36M |
|
1397
Darling Ingredients
DAR
$9.93B
| $5.34M | ﹤0.01% |
145,465
+90,354
| +164% | +$3.75M |
|
|
1398
PUT
United States Natural Gas Fund
UNG
$470M
| $5.33M | ﹤0.01% |
306,100
-88,500
| -22% | -$1.52M |
|
1399
Riot Platforms
RIOT
$8.52B
| $5.33M | ﹤0.01% |
582,822
-104,000
| -15% | -$1.05M |
|
1400
CALL
FirstEnergy
FE
$28.9B
| $5.32M | ﹤0.01% |
139,100
+40,200
| +41% | +$1.56M |
|
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.