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 | |
|---|---|---|---|---|---|---|
501
CALL
Equinix
EQIX
$101B
| $26.9M | 0.02% |
35,600
+11,200
| +46% | +$8.5M |
|
502
PUT
Etsy
ETSY
$7.64B
| $26.9M | 0.02% |
456,300
+102,700
| +29% | +$6.57M |
|
503
CALL
General Dynamics
GD
$101B
| $26.9M | 0.02% |
92,600
-30,400
| -25% | -$8.9M |
|
504
PUT
Wayfair
W
$11.1B
| $26.9M | 0.02% |
509,200
-191,300
| -27% | -$11.4M |
|
|
IPFF
505
PUT
DELISTED
iShares International Preferred Stock ETF
IPFF
| $26.8M | 0.02% |
556,600
+196,100
| +54% | +$9.45M |
|
506
PUT
Zillow
Z
$7.18B
| $26.7M | 0.02% |
577,900
-62,400
| -10% | -$2.75M |
|
|
WCC
507
CALL
WESCO International
WCC
$16.1B
| $26.7M | 0.02% |
168,600
+68,600
| +69% | +$11.7M |
|
508
CALL
Unity
U
$12.8B
| $26.5M | 0.02% |
1,630,500
+529,400
| +48% | +$11.3M |
|
509
KraneShares CSI China Internet ETF
KWEB
$5.23B
| $26.5M | 0.02% |
981,118
-1,092,007
| -53% | -$31.3M |
|
510
CALL
Chubb
CB
$133B
| $26.3M | 0.02% |
103,000
+35,500
| +53% | +$9.12M |
|
511
PUT
Akamai
AKAM
$18.1B
| $26.1M | 0.02% |
290,100
+102,400
| +55% | +$9.9M |
|
512
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$153B
| $26M | 0.02% |
386,900
-81,800
| -17% | -$4.31M |
|
513
PUT
ON Semiconductor
ON
$35.9B
| $26M | 0.02% |
379,000
+79,100
| +26% | +$5.55M |
|
514
CALL
PENN Entertainment
PENN
$2.8B
| $25.9M | 0.02% |
1,340,700
-606,400
| -31% | -$10.3M |
|
515
PUT
Las Vegas Sands
LVS
$30B
| $25.9M | 0.02% |
586,100
+43,300
| +8% | +$2.02M |
|
|
516
PUT
iShares Core MSCI Emerging Markets ETF
IEMG
$153B
| $25.8M | 0.02% |
408,800
+147,500
| +56% | +$7.78M |
|
517
CALL
American Electric Power
AEP
$72.4B
| $25.7M | 0.02% |
293,300
-419,000
| -59% | -$36.7M |
|
518
PUT
Altria Group
MO
$121B
| $25.6M | 0.02% |
563,000
+76,800
| +16% | +$3.41M |
|
519
PUT
Proshares UltraShort Technology
REW
$3.3M
| $25.6M | 0.02% |
434,050
+187,400
| +76% | +$10.1M |
|
520
CALL
Boston Scientific
BSX
$63.9B
| $25.6M | 0.02% |
331,800
-8,800
| -3% | -$644K |
|
521
PUT
Regeneron Pharmaceuticals
REGN
$68.3B
| $25.5M | 0.02% |
24,300
-6,000
| -20% | -$5.82M |
|
522
CALL
C3.ai
AI
$1.27B
| $25.4M | 0.02% |
876,800
+136,400
| +18% | +$3.5M |
|
523
PUT
Applovin
APP
$139B
| $25.3M | 0.02% |
304,600
-133,400
| -30% | -$10.4M |
|
524
CALL
Viking Therapeutics
VKTX
$4.33B
| $25.3M | 0.02% |
477,400
-25,100
| -5% | -$1.65M |
|
525
PUT
On Holding
ONON
$12.2B
| $25.3M | 0.02% |
651,300
-115,000
| -15% | -$4.2M |
|
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.