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 | |
|---|---|---|---|---|---|---|
|
CMAX
6901
CALL
DELISTED
CareMax, Inc. Class A Common Stock
CMAX
| $15K | ﹤0.01% |
250
-3
| -1% | -$210 |
|
|
AGS
6902
CALL
DELISTED
PlayAGS
AGS
| $14K | ﹤0.01% |
2,200
-14,000
| -86% | -$93.6K |
|
|
ARBK
6903
Argo Blockchain
ARBK
$41.3M
| $14K | ﹤0.01% |
68
+11
| +19% | +$3.16K |
|
6904
PUT
Brink's
BCO
$5.01B
| $14K | ﹤0.01% |
+200
| New | +$14.4K |
|
6905
CALL
Beam Global
BEEM
$21.7M
| $14K | ﹤0.01% |
2,000
-600
| -23% | -$5.61K |
|
6906
PUT
Benchmark Electronics
BHE
$2.66B
| $14K | ﹤0.01% |
600
-19,600
| -97% | -$498K |
|
6907
CALL
BJ's Restaurants
BJRI
$1.47B
| $14K | ﹤0.01% |
600
-19,300
| -97% | -$594K |
|
6908
Vanguard Total International Bond ETF
BNDX
$82B
| $14K | ﹤0.01% |
+308
| New | +$14.9K |
|
6909
CALL
Clene
CLNN
$60.3M
| $14K | ﹤0.01% |
1,490
+785
| +111% | +$10.9K |
|
6910
Cosmos Holdings
COSM
$11.3M
| $14K | ﹤0.01% |
9,552
-47,894
| -83% | -$82.3K |
|
6911
PUT
Carriage Services
CSV
$647M
| $14K | ﹤0.01% |
500
+400
| +400% | +$12.6K |
|
6912
CALL
Descartes Systems
DSGX
$6.68B
| $14K | ﹤0.01% |
200
+100
| +100% | +$7.54K |
|
6913
Vertical Aerospace
EVTL
$154M
| $14K | ﹤0.01% |
1,191
+181
| +18% | +$2.79K |
|
6914
CALL
National Vision
EYE
$1.76B
| $14K | ﹤0.01% |
900
+600
| +200% | +$12K |
|
6915
CALL
F&G Annuities & Life
FG
$3.91B
| $14K | ﹤0.01% |
+500
| New | +$13.5K |
|
6916
CALL
FNB Corp
FNB
$6.76B
| $14K | ﹤0.01% |
1,300
-14,700
| -92% | -$173K |
|
6917
CALL
Finance of America Companies
FOA
$222M
| $14K | ﹤0.01% |
1,130
-270
| -19% | -$4.47K |
|
6918
CALL
Gladstone Investment Corp
GAIN
$642M
| $14K | ﹤0.01% |
1,100
-5,300
| -83% | -$69.2K |
|
|
GAN
6919
PUT
DELISTED
GAN Ltd
GAN
| $14K | ﹤0.01% |
12,400
+400
| +3% | +$629 |
|
6920
PUT
Genmab
GMAB
$17.5B
| $14K | ﹤0.01% |
400
-600
| -60% | -$22.9K |
|
6921
Hyliion Holdings
HYLN
$578M
| $14K | ﹤0.01% |
12,144
-45,448
| -79% | -$68K |
|
6922
PUT
Inogen
INGN
$174M
| $14K | ﹤0.01% |
+2,700
| New | +$19.2K |
|
6923
PUT
Kennametal
KMT
$2.56B
| $14K | ﹤0.01% |
600
-800
| -57% | -$21.6K |
|
|
MAPS
6924
PUT
DELISTED
WM TECHNOLOGY INC A
MAPS
| $14K | ﹤0.01% |
10,800
-1,500
| -12% | -$1.81K |
|
6925
PUT
Mercury Systems
MRCY
$5.41B
| $14K | ﹤0.01% |
400
+100
| +33% | +$3.69K |
|
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.