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 | |
|---|---|---|---|---|---|---|
5401
PUT
Babcock & Wilcox
BW
$1.39B
| $74K | ﹤0.01% |
17,600
-16,500
| -48% | -$86.1K |
|
5402
Global X Autonomous & Electric Vehicles ETF
DRIV
$377M
| $74K | ﹤0.01% |
3,171
-3,147
| -50% | -$79.7K |
|
5403
Equity Residential
EQR
$24.9B
| $74K | ﹤0.01% |
1,261
-1,998
| -61% | -$129K |
|
5404
iShares MSCI Taiwan ETF
EWT
$9.86B
| $74K | ﹤0.01% |
+1,679
| New | +$77.8K |
|
5405
PUT
Federated Hermes
FHI
$4.55B
| $74K | ﹤0.01% |
2,200
-700
| -24% | -$24.1K |
|
5406
H.B. Fuller
FUL
$2.97B
| $74K | ﹤0.01% |
+1,090
| New | +$76.9K |
|
5407
Grindr
GRND
$3.08B
| $74K | ﹤0.01% |
12,939
-2,992
| -19% | -$16.7K |
|
|
LAND
5408
Gladstone Land Corp
LAND
$350M
| $74K | ﹤0.01% |
5,205
+3,886
| +295% | +$61.9K |
|
5409
CALL
Lennox International
LII
$14.4B
| $74K | ﹤0.01% |
200
-26,900
| -99% | -$9.7M |
|
5410
Ouster
OUST
$2.63B
| $74K | ﹤0.01% |
+14,866
| New | +$82.3K |
|
5411
CALL
RCM Technologies
RCMT
$201M
| $74K | ﹤0.01% |
3,800
+400
| +12% | +$7.85K |
|
5412
Safe Bulkers
SB
$795M
| $74K | ﹤0.01% |
22,859
-5,254
| -19% | -$17K |
|
5413
PUT
Treace Medical Concepts
TMCI
$280M
| $74K | ﹤0.01% |
5,700
+5,400
| +1,800% | +$98.8K |
|
5414
United States Gasoline Fund
UGA
$142M
| $74K | ﹤0.01% |
1,096
+770
| +236% | +$54.2K |
|
|
YALA
5415
CALL
Yalla Group
YALA
$818M
| $74K | ﹤0.01% |
14,200
+9,400
| +196% | +$47.8K |
|
|
SUM
5416
PUT
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $74K | ﹤0.01% |
2,400
+1,700
| +243% | +$60.5K |
|
|
HT
5417
CALL
DELISTED
Hersha Hospitality Trust Priority Class A Common Shares of Beneficial Interest
HT
| $74K | ﹤0.01% |
7,600
+4,800
| +171% | +$36.8K |
|
|
EFOR
5418
CALL
Everforth Inc
EFOR
$1.17B
| $73K | ﹤0.01% |
+900
| New | +$71.7K |
|
5419
PUT
Ashland
ASH
$3.33B
| $73K | ﹤0.01% |
900
-9,500
| -91% | -$823K |
|
5420
PUT
Century Communities
CCS
$1.91B
| $73K | ﹤0.01% |
1,100
+100
| +10% | +$7.3K |
|
5421
CALL
Enovis
ENOV
$1.68B
| $73K | ﹤0.01% |
1,400
+1,100
| +367% | +$64.1K |
|
5422
PUT
First American
FAF
$7.66B
| $73K | ﹤0.01% |
1,300
-1,000
| -43% | -$60K |
|
|
TDAY
5423
CALL
USA Today Co
TDAY
$1.27B
| $73K | ﹤0.01% |
30,200
-11,100
| -27% | -$30.7K |
|
5424
PUT
Genesco
GCO
$425M
| $73K | ﹤0.01% |
2,400
-2,000
| -45% | -$56.8K |
|
5425
The Honest Company
HNST
$402M
| $73K | ﹤0.01% |
58,548
+17,834
| +44% | +$26.1K |
|
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.