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 | |
|---|---|---|---|---|---|---|
2801
CALL
Jones Lang LaSalle
JLL
$15.4B
| $1.13M | ﹤0.01% |
5,500
-7,700
| -58% | -$1.49M |
|
2802
Post Holdings
POST
$4.16B
| $1.13M | ﹤0.01% |
10,824
-19,036
| -64% | -$1.98M |
|
2803
CALL
Ryder
R
$10.1B
| $1.13M | ﹤0.01% |
9,100
-600
| -6% | -$72.4K |
|
2804
Starwood Property Trust
STWD
$6.18B
| $1.13M | ﹤0.01% |
+59,490
| New | +$1.16M |
|
2805
CALL
Klaviyo
KVYO
$5.23B
| $1.13M | ﹤0.01% |
45,200
+19,800
| +78% | +$463K |
|
2806
CALL
Nabors Industries
NBR
$1.21B
| $1.12M | ﹤0.01% |
15,800
+7,100
| +82% | +$529K |
|
|
SILK
2807
CALL
DELISTED
Silk Road Medical, Inc. Common Stock
SILK
| $1.12M | ﹤0.01% |
41,600
-1,000
| -2% | -$20.8K |
|
2808
PUT
Lennox International
LII
$19.1B
| $1.12M | ﹤0.01% |
2,100
-700
| -25% | -$345K |
|
2809
PUT
CBRE Group
CBRE
$42B
| $1.12M | ﹤0.01% |
12,600
-95,900
| -88% | -$8.51M |
|
2810
PUT
Seadrill
SDRL
$2.72B
| $1.12M | ﹤0.01% |
21,800
+2,900
| +15% | +$147K |
|
2811
LKQ Corp
LKQ
$6.69B
| $1.12M | ﹤0.01% |
26,964
+9,641
| +56% | +$431K |
|
2812
CALL
Braze
BRZE
$2.65B
| $1.12M | ﹤0.01% |
28,800
-57,700
| -67% | -$2.3M |
|
2813
CALL
Mettler-Toledo International
MTD
$27.1B
| $1.12M | ﹤0.01% |
800
-1,000
| -56% | -$1.37M |
|
|
2814
PUT
Mettler-Toledo International
MTD
$27.1B
| $1.12M | ﹤0.01% |
800
+400
| +100% | +$547K |
|
2815
CALL
Tanger
SKT
$4.83B
| $1.12M | ﹤0.01% |
41,200
+15,300
| +59% | +$421K |
|
2816
PUT
Jefferies Financial Group
JEF
$12.9B
| $1.11M | ﹤0.01% |
22,600
-4,500
| -17% | -$202K |
|
|
SA
2817
PUT
Seabridge Gold
SA
$2.8B
| $1.11M | ﹤0.01% |
81,500
+52,900
| +185% | +$802K |
|
2818
PUT
Nexstar Media Group
NXST
$5.68B
| $1.11M | ﹤0.01% |
6,700
+3,000
| +81% | +$488K |
|
2819
CALL
CoinShares ETF Trust CoinShares Bitcoin Mining ETF
WGMI
$252M
| $1.11M | ﹤0.01% |
53,000
-26,500
| -33% | -$453K |
|
2820
PUT
Macerich
MAC
$7.47B
| $1.11M | ﹤0.01% |
71,900
-64,200
| -47% | -$982K |
|
2821
PUT
Black Stone Minerals
BSM
$3.16B
| $1.11M | ﹤0.01% |
70,800
+47,400
| +203% | +$759K |
|
2822
McEwen Inc
MUX
$1.04B
| $1.11M | ﹤0.01% |
120,842
+85,376
| +241% | +$938K |
|
2823
Rollins
ROL
$18.9B
| $1.11M | ﹤0.01% |
22,739
+11,472
| +102% | +$530K |
|
2824
Global E Online
GLBE
$6.34B
| $1.11M | ﹤0.01% |
+30,506
| New | +$984K |
|
2825
Altimmune
ALT
$554M
| $1.1M | ﹤0.01% |
166,089
+19,830
| +14% | +$146K |
|
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.