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 | |
|---|---|---|---|---|---|---|
426
PUT
Hershey
HSY
$35B
| $30.3M | 0.02% |
151,300
+75,100
| +99% | +$16.8M |
|
427
CALL
Wayfair
W
$11.1B
| $30.2M | 0.02% |
498,700
-2,200
| -0.4% | -$153K |
|
|
DOCU
428
PUT
DocuSign
DOCU
$9.14B
| $30.2M | 0.02% |
718,000
-439,900
| -38% | -$21.6M |
|
429
CALL
Abbott
ABT
$175B
| $30.1M | 0.02% |
310,700
-132,300
| -30% | -$13.9M |
|
430
PUT
Celsius Holdings
CELH
$7.28B
| $30M | 0.02% |
525,300
+197,100
| +60% | +$11.1M |
|
431
CALL
Advance Auto Parts
AAP
$3.35B
| $30M | 0.02% |
536,700
+358,600
| +201% | +$24M |
|
432
CALL
Sherwin-Williams
SHW
$78.9B
| $30M | 0.02% |
117,500
+84,200
| +253% | +$22.5M |
|
433
PUT
Northrop Grumman
NOC
$74.6B
| $29.8M | 0.02% |
67,700
+19,400
| +40% | +$8.52M |
|
434
PUT
Dick's Sporting Goods
DKS
$18.8B
| $29.8M | 0.02% |
274,100
+64,000
| +30% | +$8.1M |
|
435
PUT
Okta
OKTA
$23.8B
| $29.7M | 0.02% |
364,400
+14,300
| +4% | +$1.08M |
|
436
PUT
D.R. Horton
DHI
$40.4B
| $29.7M | 0.02% |
276,300
-317,700
| -53% | -$38M |
|
437
PUT
Medtronic
MDT
$105B
| $29.7M | 0.02% |
378,900
+80,200
| +27% | +$6.71M |
|
438
PUT
Microchip Technology
MCHP
$46.2B
| $29.6M | 0.02% |
378,700
+126,300
| +50% | +$10.6M |
|
439
PUT
Novartis
NVS
$292B
| $29.5M | 0.02% |
289,600
-32,400
| -10% | -$3.29M |
|
440
CALL
Affirm
AFRM
$24.8B
| $29.5M | 0.02% |
1,385,500
+362,800
| +35% | +$6.63M |
|
441
PUT
CF Industries
CF
$19.6B
| $29.4M | 0.02% |
343,300
-46,600
| -12% | -$3.68M |
|
442
CALL
Estee Lauder
EL
$29.9B
| $29.4M | 0.02% |
203,600
+83,400
| +69% | +$13.9M |
|
443
PUT
Las Vegas Sands
LVS
$30B
| $29.4M | 0.02% |
640,600
+231,900
| +57% | +$12.5M |
|
444
PUT
PNC Financial Services
PNC
$101B
| $29.2M | 0.02% |
237,500
-156,200
| -40% | -$19.7M |
|
445
CALL
Upstart Holdings
UPST
$2.74B
| $29.1M | 0.02% |
1,021,200
+42,100
| +4% | +$1.69M |
|
|
DFS
446
CALL
DELISTED
Discover Financial Services
DFS
| $29M | 0.02% |
334,700
+139,100
| +71% | +$13.8M |
|
447
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $28.8M | 0.02% |
871,300
-183,000
| -17% | -$3.45M |
|
448
CALL
Blackrock
BLK
$164B
| $28.8M | 0.02% |
44,500
+14,200
| +47% | +$9.92M |
|
449
PUT
Vertex Pharmaceuticals
VRTX
$120B
| $28.7M | 0.02% |
82,500
+7,900
| +11% | +$2.76M |
|
450
CALL
Nucor
NUE
$53.7B
| $28.7M | 0.02% |
183,400
+16,200
| +10% | +$2.68M |
|
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.