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 | |
|---|---|---|---|---|---|---|
1351
PUT
Trump Media & Technology Group
DJT
$2.37B
| $5.01M | ﹤0.01% |
305,000
+5,800
| +2% | +$90.3K |
|
1352
PUT
Scotiabank
BNS
$106B
| $5M | ﹤0.01% |
109,600
+41,100
| +60% | +$1.97M |
|
1353
AB InBev
BUD
$158B
| $4.99M | ﹤0.01% |
+90,306
| New | +$5.12M |
|
1354
PUT
STMicroelectronics
STM
$46B
| $4.99M | ﹤0.01% |
115,700
-63,800
| -36% | -$3.04M |
|
1355
CALL
DigitalOcean
DOCN
$14.4B
| $4.99M | ﹤0.01% |
207,600
+16,200
| +8% | +$574K |
|
|
MASI
1356
PUT
DELISTED
Masimo
MASI
| $4.99M | ﹤0.01% |
56,900
+54,100
| +1,932% | +$6.3M |
|
1357
PUT
PACCAR
PCAR
$69.6B
| $4.98M | ﹤0.01% |
58,600
+7,800
| +15% | +$663K |
|
1358
CALL
Deutsche Bank
DB
$66.3B
| $4.96M | ﹤0.01% |
451,100
+371,500
| +467% | +$4.02M |
|
|
SWAV
1359
PUT
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $4.96M | ﹤0.01% |
24,900
-14,600
| -37% | -$3.45M |
|
1360
PUT
Royalty Pharma
RPRX
$26.1B
| $4.96M | ﹤0.01% |
182,600
+106,000
| +138% | +$3.15M |
|
1361
PUT
Schwab US Broad Market ETF
SCHB
$42.8B
| $4.94M | ﹤0.01% |
210,900
+106,800
| +103% | +$1.85M |
|
|
SKX
1362
CALL
DELISTED
Skechers
SKX
| $4.93M | ﹤0.01% |
100,800
-18,000
| -15% | -$920K |
|
|
PR
1363
CALL
Permian Resources
PR
$17.9B
| $4.93M | ﹤0.01% |
353,200
-85,500
| -19% | -$1.08M |
|
1364
PUT
Rambus
RMBS
$10.4B
| $4.92M | ﹤0.01% |
88,200
-28,400
| -24% | -$1.61M |
|
1365
CALL
Ryder
R
$10.4B
| $4.92M | ﹤0.01% |
46,000
+45,500
| +9,100% | +$4.43M |
|
|
SIX
1366
PUT
DELISTED
Six Flags Entertainment Corp.
SIX
| $4.92M | ﹤0.01% |
209,100
+175,300
| +519% | +$4.14M |
|
1367
CALL
Consolidated Edison
ED
$41.6B
| $4.91M | ﹤0.01% |
57,400
+43,000
| +299% | +$3.92M |
|
1368
MongoDB
MDB
$24B
| $4.9M | ﹤0.01% |
14,174
+14,024
| +9,349% | +$5.32M |
|
1369
PUT
Hertz
HTZ
$572M
| $4.89M | ﹤0.01% |
399,500
+268,700
| +205% | +$4.49M |
|
1370
PUT
Blackstone Mortgage Trust
BXMT
$2.82B
| $4.89M | ﹤0.01% |
224,700
-2,100
| -0.9% | -$46.6K |
|
1371
CALL
Shift4
FOUR
$3.84B
| $4.88M | ﹤0.01% |
88,200
+13,000
| +17% | +$793K |
|
1372
CALL
Matador Resources
MTDR
$6.31B
| $4.88M | ﹤0.01% |
82,000
-69,700
| -46% | -$4.06M |
|
1373
CALL
KeyCorp
KEY
$24.3B
| $4.88M | ﹤0.01% |
453,100
-300,100
| -40% | -$3.32M |
|
1374
CALL
Public Service Enterprise Group
PEG
$39.8B
| $4.87M | ﹤0.01% |
85,500
+26,100
| +44% | +$1.6M |
|
1375
PUT
Markel Group
MKL
$25B
| $4.86M | ﹤0.01% |
3,300
-400
| -11% | -$586K |
|
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.