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 | Miscellaneous | 98.25% |
| 2 | Technology | 0.44% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Healthcare | 0.22% |
| 5 | Financials | 0.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
76
PUT
Oracle
ORCL
$457B
| $152M | 0.12% |
1,438,300
+593,300
| +70% | +$68.7M |
|
77
CALL
Pinduoduo
PDD
$117B
| $149M | 0.12% |
1,523,100
+216,300
| +17% | +$18.6M |
|
78
PUT
Citigroup
C
$231B
| $148M | 0.12% |
3,603,600
+955,300
| +36% | +$41.9M |
|
79
CALL
Johnson & Johnson
JNJ
$663B
| $147M | 0.12% |
944,300
-17,000
| -2% | -$2.81M |
|
80
CALL
Costco
COST
$406B
| $147M | 0.12% |
259,600
+21,000
| +9% | +$11.6M |
|
81
PUT
Eli Lilly
LLY
$1.02T
| $145M | 0.11% |
269,500
-80,100
| -23% | -$41.3M |
|
82
CALL
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$7.13B
| $145M | 0.11% |
1,006,200
-163,300
| -14% | -$4.69M |
|
83
CALL
UnitedHealth
UNH
$356B
| $143M | 0.11% |
284,500
-178,900
| -39% | -$88M |
|
84
CALL
Uber
UBER
$155B
| $143M | 0.11% |
3,116,600
-832,200
| -21% | -$38M |
|
85
PUT
First Solar
FSLR
$22B
| $143M | 0.11% |
885,900
-25,300
| -3% | -$4.72M |
|
86
CALL
TSMC
TSM
$2.22T
| $142M | 0.11% |
1,633,900
-584,400
| -26% | -$55.3M |
|
87
CALL
Walmart Inc
WMT
$850B
| $140M | 0.11% |
2,635,500
+80,400
| +3% | +$4.28M |
|
88
CALL
Palo Alto Networks
PANW
$272B
| $140M | 0.11% |
1,194,800
+288,400
| +32% | +$34.1M |
|
|
89
iShares 20+ Year Treasury Bond ETF
TLT
$46.6B
| $138M | 0.11% |
1,555,416
+574,458
| +59% | +$55.2M |
|
90
PUT
Coca-Cola
KO
$379B
| $138M | 0.11% |
2,460,800
+537,500
| +28% | +$32.2M |
|
91
CALL
Mastercard
MA
$507B
| $138M | 0.11% |
347,800
+70,500
| +25% | +$28.3M |
|
92
CALL
FedEx
FDX
$76.3B
| $137M | 0.11% |
516,500
+219,300
| +74% | +$57M |
|
93
PUT
PayPal
PYPL
$47B
| $136M | 0.11% |
2,331,700
-139,300
| -6% | -$9.07M |
|
94
CALL
AbbVie
ABBV
$453B
| $135M | 0.11% |
906,900
-54,100
| -6% | -$7.94M |
|
95
PUT
Home Depot
HD
$320B
| $132M | 0.1% |
435,700
-33,700
| -7% | -$10.8M |
|
96
CALL
Visa
V
$700B
| $130M | 0.1% |
566,700
-46,600
| -8% | -$11.2M |
|
97
CALL
Coinbase
COIN
$48.7B
| $130M | 0.1% |
1,727,400
-176,100
| -9% | -$14.8M |
|
98
CALL
Bank of America
BAC
$438B
| $129M | 0.1% |
4,719,000
+707,800
| +18% | +$20.9M |
|
99
CALL
Micron Technology
MU
$1.15T
| $129M | 0.1% |
1,898,000
-733,900
| -28% | -$49.2M |
|
100
CALL
Airbnb
ABNB
$107B
| $129M | 0.1% |
936,700
-42,400
| -4% | -$5.85M |
|
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's Q3 2023 filing shows 1,401 new, 3,688 increased, 3,363 reduced and 1,719 closed positions. Its largest new stake was Amazon: 841,102 shares worth $107M. The largest sale was Netflix, an estimated $27.1M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 1,401 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.