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 | |
|---|---|---|---|---|---|---|
4101
PUT
Compass
COMP
$8.91B
| $255K | ﹤0.01% |
88,200
+66,300
| +303% | +$234K |
|
|
BWIN
4102
CALL
Baldwin Insurance Group
BWIN
$2.77B
| $255K | ﹤0.01% |
11,000
+500
| +5% | +$12.5K |
|
4103
Cadre Holdings
CDRE
$1.33B
| $254K | ﹤0.01% |
9,548
+4,948
| +108% | +$121K |
|
|
CRON
4104
Cronos Group
CRON
$1.07B
| $254K | ﹤0.01% |
+127,007
| New | +$248K |
|
4105
CALL
Liberty Latin America Class C
LILAK
$1.68B
| $254K | ﹤0.01% |
34,320
-12,320
| -26% | -$95K |
|
4106
CALL
Medifast
MED
$108M
| $254K | ﹤0.01% |
3,400
-2,300
| -40% | -$204K |
|
|
TE
4107
PUT
T1 Energy
TE
$1.1B
| $254K | ﹤0.01% |
52,000
-165,300
| -76% | -$1.19M |
|
4108
PUT
Asbury Automotive
ABG
$4.75B
| $253K | ﹤0.01% |
1,100
+900
| +450% | +$206K |
|
4109
CALL
Viant Technology
DSP
$234M
| $253K | ﹤0.01% |
45,200
+13,700
| +43% | +$75K |
|
4110
Marqeta
MQ
$1.94B
| $253K | ﹤0.01% |
10,604
-46,008
| -81% | -$1.04M |
|
4111
PUT
Thryv Holdings
THRY
$186M
| $253K | ﹤0.01% |
13,500
+12,700
| +1,588% | +$282K |
|
4112
CALL
Twist Bioscience
TWST
$5.5B
| $253K | ﹤0.01% |
12,500
+1,400
| +13% | +$30.8K |
|
4113
CALL
Arhaus
ARHS
$1.1B
| $252K | ﹤0.01% |
27,100
-6,500
| -19% | -$68.1K |
|
|
CRON
4114
CALL
Cronos Group
CRON
$1.07B
| $252K | ﹤0.01% |
126,000
-113,300
| -47% | -$221K |
|
4115
PUT
Methanex
MEOH
$4.19B
| $252K | ﹤0.01% |
5,600
+5,400
| +2,700% | +$231K |
|
4116
PUT
Fulton Financial
FULT
$4.7B
| $251K | ﹤0.01% |
20,800
-1,000
| -5% | -$13.1K |
|
4117
Global Ship Lease
GSL
$1.58B
| $251K | ﹤0.01% |
+13,696
| New | +$267K |
|
4118
CALL
Petco
WOOF
$814M
| $251K | ﹤0.01% |
61,600
+26,500
| +75% | +$174K |
|
4119
PUT
US Foods
USFD
$22.7B
| $250K | ﹤0.01% |
6,300
-3,300
| -34% | -$137K |
|
|
NVTA
4120
CALL
DELISTED
Invitae Corporation
NVTA
| $250K | ﹤0.01% |
413,100
+102,500
| +33% | +$107K |
|
4121
CALL
ANI Pharmaceuticals
ANIP
$1.86B
| $249K | ﹤0.01% |
4,300
+2,900
| +207% | +$167K |
|
4122
PUT
Herc Holdings
HRI
$4.96B
| $249K | ﹤0.01% |
2,100
-11,400
| -84% | -$1.49M |
|
|
NGD
4123
CALL
DELISTED
New Gold Inc
NGD
| $249K | ﹤0.01% |
274,200
-1,000
| -0.4% | -$1.06K |
|
4124
Payoneer
PAYO
$2.42B
| $249K | ﹤0.01% |
40,820
-111,873
| -73% | -$631K |
|
4125
CALL
Pembina Pipeline
PBA
$29.3B
| $249K | ﹤0.01% |
8,300
-5,100
| -38% | -$157K |
|
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.