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 | |
|---|---|---|---|---|---|---|
851
CALL
Steel Dynamics
STLD
$34.7B
| $13.1M | 0.01% |
100,800
-51,800
| -34% | -$6.92M |
|
852
PUT
APA Corp
APA
$12.9B
| $13.1M | 0.01% |
443,300
-464,000
| -51% | -$14.4M |
|
853
PUT
NetApp
NTAP
$32.3B
| $13M | 0.01% |
100,900
+5,800
| +6% | +$651K |
|
854
CALL
DigitalOcean
DOCN
$15.3B
| $13M | 0.01% |
373,400
+47,500
| +15% | +$1.69M |
|
|
HUT
855
CALL
Hut 8
HUT
$13.2B
| $13M | 0.01% |
865,500
+191,300
| +28% | +$1.84M |
|
856
CALL
C.H. Robinson
CHRW
$24.2B
| $13M | 0.01% |
147,200
-38,400
| -21% | -$3.07M |
|
857
PUT
Edwards Lifesciences
EW
$48.3B
| $13M | 0.01% |
140,400
-322,200
| -70% | -$28.5M |
|
858
CALL
Ferrari
RACE
$63.2B
| $12.9M | 0.01% |
31,700
-22,300
| -41% | -$9.27M |
|
859
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$246M
| $12.9M | 0.01% |
448,400
-82,800
| -16% | -$3.58M |
|
860
CALL
Clorox
CLX
$11.3B
| $12.9M | 0.01% |
94,800
-63,800
| -40% | -$8.86M |
|
861
PUT
Crown Castle
CCI
$32.5B
| $12.9M | 0.01% |
132,400
-52,200
| -28% | -$5.14M |
|
862
CALL
Baker Hughes
BKR
$55.6B
| $12.9M | 0.01% |
367,500
-46,400
| -11% | -$1.52M |
|
863
PUT
CleanSpark
CLSK
$4.01B
| $12.9M | 0.01% |
810,300
+83,200
| +11% | +$1.4M |
|
864
CALL
BioMarin Pharmaceuticals
BMRN
$11.4B
| $12.9M | 0.01% |
156,800
+118,200
| +306% | +$9.84M |
|
865
CALL
Veeva Systems
VEEV
$29.2B
| $12.9M | 0.01% |
70,500
-40,900
| -37% | -$8.12M |
|
866
CALL
Knight Transportation
KNX
$11.8B
| $12.9M | 0.01% |
258,300
+219,300
| +562% | +$10.7M |
|
|
SHNY
867
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $12.9M | 0.01% |
1,274,000
-407,600
| -24% | -$4.12M |
|
|
WBA
868
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $12.8M | 0.01% |
1,057,700
-610,300
| -37% | -$10.4M |
|
869
PUT
AutoZone
AZO
$47.7B
| $12.7M | 0.01% |
4,300
-4,100
| -49% | -$12M |
|
870
CALL
Twilio
TWLO
$28.1B
| $12.7M | 0.01% |
224,100
-452,200
| -67% | -$26.7M |
|
871
PUT
Stellantis
STLA
$16.7B
| $12.7M | 0.01% |
640,400
+141,500
| +28% | +$3.28M |
|
|
SGI
872
PUT
Somnigroup International
SGI
$14.5B
| $12.7M | 0.01% |
268,100
+216,900
| +424% | +$11M |
|
873
Affirm
AFRM
$23.8B
| $12.7M | 0.01% |
419,737
+349,176
| +495% | +$11.2M |
|
|
874
PUT
Ferrari
RACE
$63.2B
| $12.7M | 0.01% |
31,000
-20,200
| -39% | -$8.4M |
|
875
PUT
General Mills
GIS
$19B
| $12.6M | 0.01% |
199,800
-62,000
| -24% | -$4.26M |
|
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.