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 | |
|---|---|---|---|---|---|---|
726
CALL
Illumina
ILMN
$29.8B
| $14.8M | 0.01% |
110,921
+1,336
| +1% | +$220K |
|
727
PUT
HP
HPQ
$22.4B
| $14.8M | 0.01% |
575,900
-48,400
| -8% | -$1.48M |
|
728
CALL
Canadian Natural Resources
CNQ
$98B
| $14.8M | 0.01% |
457,400
-111,800
| -20% | -$3.42M |
|
729
PUT
Cencora
COR
$59.4B
| $14.8M | 0.01% |
82,000
-19,900
| -20% | -$3.68M |
|
730
PUT
Truist Financial
TFC
$62.5B
| $14.7M | 0.01% |
514,700
+123,300
| +32% | +$3.79M |
|
731
PUT
Altria Group
MO
$120B
| $14.7M | 0.01% |
349,800
+81,500
| +30% | +$3.6M |
|
732
CALL
Sysco
SYY
$39.1B
| $14.7M | 0.01% |
222,700
+138,100
| +163% | +$9.92M |
|
733
PUT
Western Alliance Bancorporation
WAL
$9.06B
| $14.7M | 0.01% |
319,500
+80,700
| +34% | +$3.81M |
|
734
CALL
Jabil
JBL
$33.7B
| $14.7M | 0.01% |
115,600
-100
| -0.1% | -$10.9K |
|
735
CALL
Fabrinet
FN
$18.6B
| $14.7M | 0.01% |
88,000
-700
| -0.8% | -$97.1K |
|
736
PUT
Macy's
M
$6.14B
| $14.6M | 0.01% |
1,259,900
+417,500
| +50% | +$5.85M |
|
737
CALL
Williams Companies
WMB
$92B
| $14.6M | 0.01% |
433,500
-10,000
| -2% | -$341K |
|
738
CALL
Veeva Systems
VEEV
$29.2B
| $14.6M | 0.01% |
71,700
+11,000
| +18% | +$2.22M |
|
739
CALL
Tyson Foods
TSN
$20B
| $14.5M | 0.01% |
287,400
-134,100
| -32% | -$7.14M |
|
740
PUT
The Mosaic Company
MOS
$7.08B
| $14.5M | 0.01% |
407,300
-306,700
| -43% | -$11.8M |
|
741
CALL
Robinhood
HOOD
$91.2B
| $14.5M | 0.01% |
1,477,100
+591,300
| +67% | +$6.56M |
|
742
PUT
Zions Bancorporation
ZION
$10.1B
| $14.5M | 0.01% |
415,300
-21,500
| -5% | -$750K |
|
743
PUT
Riot Platforms
RIOT
$9.02B
| $14.5M | 0.01% |
1,550,800
+482,600
| +45% | +$6.65M |
|
744
CALL
Paycom
PAYC
$6.47B
| $14.5M | 0.01% |
55,800
+33,700
| +152% | +$10.3M |
|
|
TYNS
745
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $14.4M | 0.01% |
243,400
-54,300
| -18% | -$3.22M |
|
746
PUT
Antero Resources
AR
$10.9B
| $14.4M | 0.01% |
568,900
-250,000
| -31% | -$6.45M |
|
747
CALL
Norwegian Cruise Line
NCLH
$8.59B
| $14.4M | 0.01% |
871,600
-668,000
| -43% | -$12.3M |
|
748
CALL
Dell
DELL
$284B
| $14.3M | 0.01% |
207,100
-39,800
| -16% | -$2.37M |
|
749
PUT
L3Harris
LHX
$55.8B
| $14.2M | 0.01% |
81,800
+28,100
| +52% | +$5.17M |
|
750
CALL
Nutanix
NTNX
$14.2B
| $14.2M | 0.01% |
407,800
+132,900
| +48% | +$4.17M |
|
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.