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 | |
|---|---|---|---|---|---|---|
5226
CALL
Imperial Petroleum
IMPP
$212M
| $87K | ﹤0.01% |
58,000
+29,100
| +101% | +$59.8K |
|
5227
Levi Strauss
LEVI
$9.45B
| $87K | ﹤0.01% |
+6,446
| New | +$90.1K |
|
5228
CALL
ManpowerGroup
MAN
$2.41B
| $87K | ﹤0.01% |
+1,200
| New | +$93.4K |
|
5229
PUT
Movado Group
MOV
$849M
| $87K | ﹤0.01% |
3,200
+1,900
| +146% | +$51.7K |
|
5230
PUT
Oceaneering
OII
$4.74B
| $87K | ﹤0.01% |
3,400
-500
| -13% | -$11.4K |
|
5231
PUT
Olema Pharmaceuticals
OLMA
$1.03B
| $87K | ﹤0.01% |
7,100
+2,900
| +69% | +$29.6K |
|
5232
Playtika
PLTK
$1.51B
| $87K | ﹤0.01% |
9,052
-22,480
| -71% | -$241K |
|
5233
Red Robin
RRGB
$144M
| $87K | ﹤0.01% |
10,884
+4,133
| +61% | +$49.3K |
|
5234
Tilly's
TLYS
$113M
| $87K | ﹤0.01% |
+10,753
| New | +$88.4K |
|
5235
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $87K | ﹤0.01% |
+1,519
| New | +$87.5K |
|
5236
CALL
United Parks & Resorts
PRKS
$2.15B
| $87K | ﹤0.01% |
1,900
-200
| -10% | -$10.2K |
|
|
CANO
5237
CALL
DELISTED
Cano Health, Inc.
CANO
| $87K | ﹤0.01% |
3,454
-2,580
| -43% | -$212K |
|
5238
CALL
Arcosa
ACA
$7.13B
| $86K | ﹤0.01% |
+1,200
| New | +$91K |
|
5239
PUT
Ardagh Metal Packaging
AMBP
$2.9B
| $86K | ﹤0.01% |
27,600
-3,300
| -11% | -$11.6K |
|
5240
CALL
Chefs' Warehouse
CHEF
$4.58B
| $86K | ﹤0.01% |
4,100
+3,100
| +310% | +$94.8K |
|
5241
PUT
Cheniere Energy
CQP
$31.5B
| $86K | ﹤0.01% |
1,600
+1,400
| +700% | +$72K |
|
5242
CALL
Kiniksa Pharmaceuticals
KNSA
$6.1B
| $86K | ﹤0.01% |
5,000
-800
| -14% | -$13.5K |
|
5243
CALL
MasterCraft Boat Holdings
MCFT
$597M
| $86K | ﹤0.01% |
3,900
-1,000
| -20% | -$25.7K |
|
5244
PUT
Methode Electronics
MEI
$486M
| $86K | ﹤0.01% |
3,800
+3,700
| +3,700% | +$110K |
|
|
NVEE
5245
CALL
DELISTED
NV5 Global
NVEE
| $86K | ﹤0.01% |
3,600
+1,600
| +80% | +$41.2K |
|
|
PCH
5246
CALL
DELISTED
PotlatchDeltic
PCH
| $86K | ﹤0.01% |
1,900
+600
| +46% | +$29.6K |
|
5247
The RealReal
REAL
$1.44B
| $86K | ﹤0.01% |
41,110
-171,046
| -81% | -$417K |
|
5248
CALL
Sonoco
SON
$5.62B
| $86K | ﹤0.01% |
1,600
+300
| +23% | +$17K |
|
|
UCTT
5249
PUT
Ultra Clean Holdings
UCTT
$3.73B
| $86K | ﹤0.01% |
2,900
-700
| -19% | -$23.6K |
|
5250
PUT
Universal Insurance Holdings
UVE
$1.23B
| $86K | ﹤0.01% |
+6,200
| New | +$87.1K |
|
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.