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 | |
|---|---|---|---|---|---|---|
|
DAY
1326
CALL
DELISTED
Dayforce
DAY
| $5.18M | ﹤0.01% |
76,400
+56,700
| +288% | +$3.99M |
|
1327
PUT
Coupang
CPNG
$27.8B
| $5.18M | ﹤0.01% |
304,800
-44,500
| -13% | -$800K |
|
1328
CALL
Qorvo
QRVO
$7.63B
| $5.16M | ﹤0.01% |
54,100
-11,300
| -17% | -$1.15M |
|
1329
PUT
SBA Communications
SBAC
$18.4B
| $5.16M | ﹤0.01% |
25,800
+19,900
| +337% | +$4.43M |
|
1330
PUT
CubeSmart
CUBE
$9.53B
| $5.16M | ﹤0.01% |
135,200
+22,100
| +20% | +$933K |
|
1331
PUT
IQVIA
IQV
$34.7B
| $5.15M | ﹤0.01% |
26,200
+24,500
| +1,441% | +$5.32M |
|
1332
CALL
GlobalFoundries
GFS
$29.4B
| $5.15M | ﹤0.01% |
88,500
+58,600
| +196% | +$3.48M |
|
1333
PUT
Winnebago Industries
WGO
$870M
| $5.15M | ﹤0.01% |
86,600
-90,700
| -51% | -$5.88M |
|
1334
PUT
Sysco
SYY
$39.7B
| $5.14M | ﹤0.01% |
77,900
+26,100
| +50% | +$1.88M |
|
1335
PUT
Alpha Metallurgical Resources
AMR
$1.82B
| $5.14M | ﹤0.01% |
19,800
+200
| +1% | +$39.1K |
|
|
FLG
1336
CALL
Flagstar Bank National Association
FLG
$5.77B
| $5.14M | ﹤0.01% |
151,167
+26,667
| +21% | +$965K |
|
1337
PUT
MSCI
MSCI
$40B
| $5.13M | ﹤0.01% |
10,000
+3,200
| +47% | +$1.68M |
|
|
MASI
1338
CALL
DELISTED
Masimo
MASI
| $5.13M | ﹤0.01% |
58,500
+57,000
| +3,800% | +$6.63M |
|
1339
PUT
Stellantis
STLA
$16.5B
| $5.12M | ﹤0.01% |
267,800
+58,600
| +28% | +$1.1M |
|
1340
CALL
Vistra
VST
$55.1B
| $5.1M | ﹤0.01% |
153,700
+6,200
| +4% | +$186K |
|
1341
CALL
Hormel Foods
HRL
$13.9B
| $5.09M | ﹤0.01% |
133,900
+123,700
| +1,213% | +$4.87M |
|
1342
PUT
Stanley Black & Decker
SWK
$14.2B
| $5.07M | ﹤0.01% |
60,700
+24,700
| +69% | +$2.29M |
|
1343
Direxion Daily Semiconductor Bull 3X ETF
SOXL
$18.7B
| $5.07M | ﹤0.01% |
+268,477
| New | +$6.15M |
|
1344
CALL
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $5.07M | ﹤0.01% |
81,900
+59,100
| +259% | +$3.41M |
|
1345
PUT
Parker-Hannifin
PH
$125B
| $5.06M | ﹤0.01% |
13,000
+500
| +4% | +$201K |
|
1346
PUT
Wheaton Precious Metals
WPM
$50.6B
| $5.04M | ﹤0.01% |
124,200
+58,500
| +89% | +$2.52M |
|
1347
CALL
CSX Corp
CSX
$98.6B
| $5.03M | ﹤0.01% |
163,500
-130,700
| -44% | -$4.14M |
|
1348
CALL
Omnicom Group
OMC
$22.7B
| $5.03M | ﹤0.01% |
67,500
+23,900
| +55% | +$1.97M |
|
1349
CALL
Dutch Bros
BROS
$8.78B
| $5.01M | ﹤0.01% |
215,700
-3,900
| -2% | -$111K |
|
1350
CALL
Perrigo
PRGO
$1.4B
| $5.01M | ﹤0.01% |
156,900
+151,100
| +2,605% | +$5.32M |
|
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.