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 | |
|---|---|---|---|---|---|---|
2551
CALL
HUB Group
HUBG
$3.01B
| $1.41M | ﹤0.01% |
32,800
+3,000
| +10% | +$127K |
|
|
SEE
2552
CALL
DELISTED
Sealed Air
SEE
| $1.41M | ﹤0.01% |
40,600
-49,300
| -55% | -$1.76M |
|
2553
CALL
Jacobs Solutions
J
$15.9B
| $1.41M | ﹤0.01% |
12,211
-15,837
| -56% | -$1.86M |
|
2554
Opendoor
OPEN
$3.69B
| $1.41M | ﹤0.01% |
792,388
+414,664
| +110% | +$894K |
|
2555
CALL
GXO Logistics
GXO
$6.06B
| $1.41M | ﹤0.01% |
27,900
+21,800
| +357% | +$1.1M |
|
2556
PUT
Dover
DOV
$27.2B
| $1.41M | ﹤0.01% |
7,800
-35,900
| -82% | -$6.43M |
|
2557
CALL
Inspire Medical Systems
INSP
$1.42B
| $1.41M | ﹤0.01% |
10,500
-33,100
| -76% | -$6.26M |
|
2558
CALL
Hertz
HTZ
$572M
| $1.4M | ﹤0.01% |
397,000
-93,300
| -19% | -$474K |
|
2559
AES
AES
$10.6B
| $1.4M | ﹤0.01% |
79,646
+24,355
| +44% | +$463K |
|
2560
PUT
Legend Biotech
LEGN
$4.3B
| $1.4M | ﹤0.01% |
31,600
-12,000
| -28% | -$554K |
|
2561
CALL
Reliance Steel & Aluminium
RS
$20.8B
| $1.4M | ﹤0.01% |
4,900
-8,700
| -64% | -$2.62M |
|
|
INFA
2562
CALL
DELISTED
Informatica
INFA
| $1.4M | ﹤0.01% |
45,300
+31,800
| +236% | +$1M |
|
2563
CALL
Aviat Networks
AVNW
$262M
| $1.4M | ﹤0.01% |
48,700
+39,500
| +429% | +$1.25M |
|
2564
CALL
Weatherford International
WFRD
$6.36B
| $1.4M | ﹤0.01% |
11,400
-14,600
| -56% | -$1.74M |
|
2565
Oscar Health
OSCR
$8.5B
| $1.39M | ﹤0.01% |
88,120
+40,207
| +84% | +$739K |
|
2566
PUT
Warrior Met Coal
HCC
$4.23B
| $1.39M | ﹤0.01% |
22,200
-7,700
| -26% | -$499K |
|
2567
Altria Group
MO
$122B
| $1.39M | ﹤0.01% |
30,583
+24,626
| +413% | +$1.09M |
|
|
DO
2568
CALL
DELISTED
Diamond Offshore Drilling, Inc.
DO
| $1.39M | ﹤0.01% |
89,900
-73,900
| -45% | -$1.05M |
|
2569
CALL
Brookfield Renewable
BEPC
$6.12B
| $1.39M | ﹤0.01% |
48,900
+42,000
| +609% | +$1.17M |
|
2570
Itaú Unibanco
ITUB
$91.3B
| $1.39M | ﹤0.01% |
+269,110
| New | +$1.47M |
|
2571
CALL
Vanguard Total Bond Market
BND
$157B
| $1.39M | ﹤0.01% |
19,300
+9,800
| +103% | +$702K |
|
2572
CALL
VeriSign
VRSN
$25.3B
| $1.39M | ﹤0.01% |
7,800
-700
| -8% | -$125K |
|
2573
CALL
Organon & Co
OGN
$3.55B
| $1.38M | ﹤0.01% |
66,900
-44,400
| -40% | -$882K |
|
2574
CALL
Keysight
KEYS
$54.5B
| $1.38M | ﹤0.01% |
10,100
-35,900
| -78% | -$5.25M |
|
2575
CALL
Jazz Pharmaceuticals
JAZZ
$15.9B
| $1.38M | ﹤0.01% |
12,900
+5,700
| +79% | +$627K |
|
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.