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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1501
CALL
Chegg
CHGG
$108M
| $3.98M | ﹤0.01% |
446,700
+258,300
| +137% | +$2.52M |
|
1502
MGM Resorts International
MGM
$11.7B
| $3.98M | ﹤0.01% |
108,398
+105,926
| +4,285% | +$4.68M |
|
1503
CALL
FMC
FMC
$1.42B
| $3.96M | ﹤0.01% |
59,200
+53,600
| +957% | +$4.64M |
|
1504
PUT
AES
AES
$10.6B
| $3.95M | ﹤0.01% |
259,900
+241,800
| +1,336% | +$4.61M |
|
1505
CALL
Willis Towers Watson
WTW
$27.9B
| $3.95M | ﹤0.01% |
18,900
+15,900
| +530% | +$3.39M |
|
1506
CALL
AngloGold Ashanti
AU
$40.3B
| $3.95M | ﹤0.01% |
249,900
-165,400
| -40% | -$3.12M |
|
1507
CALL
Hyatt Hotels
H
$17.6B
| $3.95M | ﹤0.01% |
37,200
+17,100
| +85% | +$1.95M |
|
1508
CALL
CONMED
CNMD
$1.29B
| $3.94M | ﹤0.01% |
39,100
+28,700
| +276% | +$3.3M |
|
1509
CALL
First Horizon
FHN
$12.1B
| $3.93M | ﹤0.01% |
356,800
+225,500
| +172% | +$2.79M |
|
1510
PUT
CoStar Group
CSGP
$11.3B
| $3.92M | ﹤0.01% |
51,000
-29,200
| -36% | -$2.42M |
|
1511
PUT
State Street
STT
$50.9B
| $3.9M | ﹤0.01% |
58,300
+14,400
| +33% | +$1.02M |
|
|
MRSH
1512
CALL
Marsh
MRSH
$86.3B
| $3.9M | ﹤0.01% |
20,500
+16,700
| +439% | +$3.2M |
|
1513
PUT
Charles River Laboratories
CRL
$10.9B
| $3.9M | ﹤0.01% |
19,900
+7,200
| +57% | +$1.48M |
|
1514
PUT
Bank of Montreal
BMO
$125B
| $3.9M | ﹤0.01% |
46,200
-4,600
| -9% | -$404K |
|
|
XIFR
1515
CALL
XPLR Infrastructure LP
XIFR
$1.18B
| $3.9M | ﹤0.01% |
131,200
+99,500
| +314% | +$5.04M |
|
1516
CALL
Xcel Energy
XEL
$51B
| $3.87M | ﹤0.01% |
67,700
+52,000
| +331% | +$3.13M |
|
1517
Nice
NICE
$5.29B
| $3.87M | ﹤0.01% |
22,768
+18,491
| +432% | +$3.68M |
|
1518
PUT
Camping World
CWH
$363M
| $3.87M | ﹤0.01% |
189,500
+80,200
| +73% | +$2.11M |
|
1519
PennyMac Financial
PFSI
$4.38B
| $3.86M | ﹤0.01% |
58,013
+25,732
| +80% | +$1.85M |
|
|
EXE
1520
PUT
Expand Energy Corp
EXE
$21.9B
| $3.86M | ﹤0.01% |
44,800
+13,300
| +42% | +$1.13M |
|
1521
CALL
BJs Wholesale Club
BJ
$11.9B
| $3.85M | ﹤0.01% |
54,000
+23,100
| +75% | +$1.55M |
|
|
CIVI
1522
PUT
DELISTED
Civitas Resources
CIVI
| $3.85M | ﹤0.01% |
47,600
+36,300
| +321% | +$2.81M |
|
1523
CALL
Lumentum
LITE
$59.4B
| $3.84M | ﹤0.01% |
85,000
-21,000
| -20% | -$1.07M |
|
1524
PUT
Elastic
ESTC
$6.1B
| $3.83M | ﹤0.01% |
47,200
+1,100
| +2% | +$75K |
|
1525
Mondelez International
MDLZ
$77.7B
| $3.82M | ﹤0.01% |
+55,114
| New | +$3.97M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.