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 | |
|---|---|---|---|---|---|---|
776
PUT
Darden Restaurants
DRI
$22.2B
| $14.7M | 0.01% |
96,900
-65,900
| -40% | -$10M |
|
777
PUT
Prologis
PLD
$135B
| $14.7M | 0.01% |
130,500
+34,300
| +36% | +$3.8M |
|
778
CALL
Cigna
CI
$75.7B
| $14.6M | 0.01% |
44,300
-22,000
| -33% | -$7.59M |
|
779
PUT
Upstart Holdings
UPST
$2.64B
| $14.6M | 0.01% |
620,500
-138,500
| -18% | -$3.34M |
|
|
AXON
780
CALL
Axon Enterprise
AXON
$39.6B
| $14.6M | 0.01% |
49,700
-21,500
| -30% | -$6.42M |
|
781
CALL
SolarEdge
SEDG
$2.75B
| $14.6M | 0.01% |
577,800
+334,000
| +137% | +$17.4M |
|
782
CALL
Oneok
OKE
$58.7B
| $14.6M | 0.01% |
178,500
-15,200
| -8% | -$1.21M |
|
783
PUT
British American Tobacco
BTI
$129B
| $14.5M | 0.01% |
469,500
+59,700
| +15% | +$1.81M |
|
784
CALL
Waste Management
WM
$95.3B
| $14.5M | 0.01% |
68,000
-21,900
| -24% | -$4.55M |
|
785
CALL
ZIM Integrated Shipping Services
ZIM
$3.08B
| $14.5M | 0.01% |
653,000
+109,500
| +20% | +$1.77M |
|
786
PUT
KB Home
KBH
$3.41B
| $14.5M | 0.01% |
206,000
-40,200
| -16% | -$2.74M |
|
787
Booking.com
BKNG
$134B
| $14.4M | 0.01% |
90,950
-72,350
| -44% | -$10.7M |
|
788
PUT
Air Products & Chemicals
APD
$65.5B
| $14.4M | 0.01% |
55,800
-23,300
| -29% | -$5.91M |
|
789
CALL
BHP
BHP
$212B
| $14.4M | 0.01% |
251,400
+32,500
| +15% | +$1.89M |
|
|
DOCU
790
CALL
DocuSign
DOCU
$8.98B
| $14.3M | 0.01% |
267,900
-377,600
| -58% | -$21.3M |
|
791
PUT
First Citizens BancShares
FCNCA
$25.6B
| $14.3M | 0.01% |
8,500
+2,200
| +35% | +$3.68M |
|
792
CALL
Toronto Dominion Bank
TD
$197B
| $14.3M | 0.01% |
259,700
-44,000
| -14% | -$2.49M |
|
793
PUT
Kohl's
KSS
$2.06B
| $14.1M | 0.01% |
614,100
+219,800
| +56% | +$5.31M |
|
794
CALL
United Rentals
URI
$71.4B
| $14.1M | 0.01% |
21,800
-38,800
| -64% | -$25.8M |
|
795
PUT
Warner Bros
WBD
$65.1B
| $14.1M | 0.01% |
1,893,300
-311,300
| -14% | -$2.49M |
|
796
PUT
Steel Dynamics
STLD
$34.7B
| $14.1M | 0.01% |
108,600
+14,900
| +16% | +$1.99M |
|
797
CALL
Aflac
AFL
$63.3B
| $14M | 0.01% |
157,200
-37,200
| -19% | -$3.2M |
|
|
EXE
798
CALL
Expand Energy Corp
EXE
$21.9B
| $13.9M | 0.01% |
169,400
+25,300
| +18% | +$2.23M |
|
799
PUT
Toll Brothers
TOL
$13.7B
| $13.9M | 0.01% |
120,500
-25,800
| -18% | -$3.12M |
|
800
PUT
J.M. Smucker
SJM
$12.4B
| $13.8M | 0.01% |
127,000
+21,300
| +20% | +$2.41M |
|
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.