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 | |
|---|---|---|---|---|---|---|
626
PUT
GE Vernova
GEV
$262B
| $19.6M | 0.01% |
+114,500
| New | +$18.1M |
|
627
CVS Health
CVS
$138B
| $19.6M | 0.01% |
332,122
+184,885
| +126% | +$11.6M |
|
628
CALL
Dominion Energy
D
$62.5B
| $19.5M | 0.01% |
398,100
+21,900
| +6% | +$1.12M |
|
629
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $19.5M | 0.01% |
41,600
-18,800
| -31% | -$8.16M |
|
630
PUT
Stryker
SYK
$119B
| $19.5M | 0.01% |
57,300
+6,100
| +12% | +$2.07M |
|
631
PUT
CarMax
KMX
$8.15B
| $19.3M | 0.01% |
263,800
+53,500
| +25% | +$3.86M |
|
632
PUT
Roblox
RBLX
$35.5B
| $19.3M | 0.01% |
517,500
-194,700
| -27% | -$6.93M |
|
633
CALL
Simon Property Group
SPG
$73.4B
| $19.2M | 0.01% |
126,500
-124,600
| -50% | -$18.4M |
|
634
PUT
Archer Daniels Midland
ADM
$42.1B
| $19.2M | 0.01% |
317,000
-27,000
| -8% | -$1.65M |
|
635
CALL
APA Corp
APA
$12.8B
| $19.2M | 0.01% |
650,600
+41,300
| +7% | +$1.28M |
|
636
CALL
ProShares Ether Strategy ETF
EETH
$56.1M
| $19.1M | 0.01% |
494,900
+476,700
| +2,619% | +$34.5M |
|
637
PUT
ProShares Ultra Bloomberg Natural Gas
BOIL
$422M
| $19.1M | 0.01% |
80,660
-42,510
| -35% | -$7.09M |
|
|
X
638
CALL
DELISTED
US Steel
X
| $19.1M | 0.01% |
504,800
-157,200
| -24% | -$6M |
|
639
PUT
Electronic Arts
EA
$52.4B
| $19.1M | 0.01% |
136,800
+5,200
| +4% | +$685K |
|
|
SCIU
640
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $19.1M | 0.01% |
599,100
-128,000
| -18% | -$4.07M |
|
641
CALL
DexCom
DXCM
$27.6B
| $18.9M | 0.01% |
167,100
-128,000
| -43% | -$16.2M |
|
642
CALL
GraniteShares Bloomberg Commodity Broad Strategy No K-1 ETF
COMB
$135M
| $18.9M | 0.01% |
367,600
-24,900
| -6% | -$514K |
|
643
PUT
Ross Stores
ROST
$76.4B
| $18.9M | 0.01% |
130,200
+25,600
| +24% | +$3.54M |
|
644
CALL
Domino's
DPZ
$10.6B
| $18.8M | 0.01% |
36,500
-10,100
| -22% | -$5.15M |
|
645
PUT
Okta
OKTA
$23.8B
| $18.8M | 0.01% |
201,300
-75,600
| -27% | -$7.16M |
|
646
CALL
Carrier Global
CARR
$56.6B
| $18.8M | 0.01% |
298,000
-248,700
| -45% | -$15.3M |
|
647
CALL
Albemarle
ALB
$13.9B
| $18.8M | 0.01% |
196,500
-12,400
| -6% | -$1.47M |
|
648
Meta Platforms (Facebook)
META
$1.59T
| $18.7M | 0.01% |
37,167
-71,048
| -66% | -$34.5M |
|
649
PUT
Bilibili
BILI
$7.4B
| $18.7M | 0.01% |
1,208,700
+243,600
| +25% | +$3.4M |
|
650
PUT
Elevance Health
ELV
$84.4B
| $18.6M | 0.01% |
34,400
-20,200
| -37% | -$10.7M |
|
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.