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 | |
|---|---|---|---|---|---|---|
3401
Invesco NASDAQ 100 ETF
QQQM
$95.9B
| $499K | ﹤0.01% |
3,386
-13,409
| -80% | -$2.05M |
|
3402
CALL
Viper Energy
VNOM
$8.4B
| $499K | ﹤0.01% |
17,900
+5,700
| +47% | +$157K |
|
|
CGC
3403
PUT
Canopy Growth
CGC
$390M
| $498K | ﹤0.01% |
63,720
-9,130
| -13% | -$55.8K |
|
3404
Radware
RDWR
$1.23B
| $498K | ﹤0.01% |
29,479
+1,388
| +5% | +$24.4K |
|
3405
Molina Healthcare
MOH
$10.4B
| $497K | ﹤0.01% |
+1,517
| New | +$477K |
|
|
ACCD
3406
DELISTED
Accolade Inc
ACCD
| $497K | ﹤0.01% |
46,995
+4,646
| +11% | +$61K |
|
3407
iShares US Oil & Gas Exploration & Production ETF
IEO
$558M
| $496K | ﹤0.01% |
5,091
+3,148
| +162% | +$299K |
|
3408
PUT
Noble Corp
NE
$6.88B
| $496K | ﹤0.01% |
9,800
+7,900
| +416% | +$403K |
|
3409
CALL
Main Street Capital
MAIN
$5B
| $495K | ﹤0.01% |
12,200
-19,800
| -62% | -$808K |
|
|
TEN
3410
Tsakos Energy Navigation Ltd
TEN
$1.18B
| $495K | ﹤0.01% |
23,855
-3,069
| -11% | -$60.8K |
|
|
FIRY
3411
CALL
Firy Inc
FIRY
$130M
| $494K | ﹤0.01% |
96,900
-4,000
| -4% | -$35.5K |
|
3412
Vipshop
VIPS
$7.08B
| $494K | ﹤0.01% |
30,890
+7,856
| +34% | +$128K |
|
3413
Vicor
VICR
$9.41B
| $493K | ﹤0.01% |
+8,385
| New | +$556K |
|
3414
PUT
The Greenbrier Companies
GBX
$1.56B
| $492K | ﹤0.01% |
12,300
+5,500
| +81% | +$236K |
|
3415
CALL
Icon
ICLR
$13B
| $492K | ﹤0.01% |
2,000
-1,300
| -39% | -$328K |
|
3416
PUT
Kimco Realty
KIM
$17.8B
| $492K | ﹤0.01% |
28,000
+24,000
| +600% | +$466K |
|
3417
Stratasys
SSYS
$700M
| $492K | ﹤0.01% |
36,186
+21,546
| +147% | +$341K |
|
3418
Ambev
ABEV
$47.4B
| $490K | ﹤0.01% |
190,041
+90,127
| +90% | +$261K |
|
3419
PUT
Artisan Partners
APAM
$2.86B
| $490K | ﹤0.01% |
13,100
-2,600
| -17% | -$101K |
|
3420
PUT
Nordson
NDSN
$16.6B
| $490K | ﹤0.01% |
+2,200
| New | +$527K |
|
3421
CALL
Manulife Financial
MFC
$73.2B
| $489K | ﹤0.01% |
26,800
-44,000
| -62% | -$832K |
|
3422
CALL
Arcturus Therapeutics
ARCT
$164M
| $488K | ﹤0.01% |
19,100
+8,300
| +77% | +$256K |
|
3423
First Horizon
FHN
$12.1B
| $488K | ﹤0.01% |
44,355
+34,657
| +357% | +$429K |
|
3424
PUT
Centrus Energy
LEU
$3.46B
| $488K | ﹤0.01% |
8,600
+3,000
| +54% | +$129K |
|
3425
Lifecore Biomedical
LFCR
$163M
| $488K | ﹤0.01% |
64,708
+9,434
| +17% | +$86.2K |
|
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.