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 | |
|---|---|---|---|---|---|---|
4076
Alta Equipment Group
ALTG
$197M
| $261K | ﹤0.01% |
21,663
+18,497
| +584% | +$277K |
|
4077
Host Hotels & Resorts
HST
$17.4B
| $261K | ﹤0.01% |
+16,266
| New | +$271K |
|
4078
CALL
Lightwave Logic
LWLG
$840M
| $261K | ﹤0.01% |
58,500
+5,800
| +11% | +$37K |
|
|
PDS
4079
CALL
Precision Drilling
PDS
$938M
| $261K | ﹤0.01% |
3,900
-6,000
| -61% | -$381K |
|
4080
Trimble
TRMB
$13.6B
| $261K | ﹤0.01% |
+4,850
| New | +$257K |
|
4081
CALL
Worksport
WKSP
$8.78M
| $261K | ﹤0.01% |
12,450
+11,770
| +1,731% | +$349K |
|
4082
iShares Core US Aggregate Bond ETF
AGG
$138B
| $260K | ﹤0.01% |
+2,775
| New | +$267K |
|
4083
PUT
Blackbaud
BLKB
$1.96B
| $260K | ﹤0.01% |
+3,700
| New | +$272K |
|
4084
PUT
Dole
DOLE
$1.37B
| $260K | ﹤0.01% |
22,500
+21,200
| +1,631% | +$265K |
|
4085
CALL
Hycroft Mining Holding Corp
HYMC
$1.75B
| $260K | ﹤0.01% |
87,270
+3,930
| +5% | +$14.5K |
|
4086
Silicon Laboratories
SLAB
$7.17B
| $260K | ﹤0.01% |
2,248
+1,617
| +256% | +$223K |
|
4087
CALL
Kratos Defense & Security Solutions
KTOS
$8.53B
| $259K | ﹤0.01% |
17,300
-2,400
| -12% | -$35.7K |
|
4088
PUT
Navitas Semiconductor
NVTS
$2.65B
| $259K | ﹤0.01% |
37,400
+12,800
| +52% | +$113K |
|
4089
OSI Systems
OSIS
$3.57B
| $259K | ﹤0.01% |
2,199
+1,015
| +86% | +$122K |
|
4090
CALL
Power Integrations
POWI
$3.15B
| $259K | ﹤0.01% |
3,400
+1,200
| +55% | +$103K |
|
|
VRE
4091
PUT
DELISTED
Veris Residential
VRE
| $259K | ﹤0.01% |
15,700
-206,700
| -93% | -$3.64M |
|
4092
CALL
Compañía de Minas Buenaventura
BVN
$7.47B
| $258K | ﹤0.01% |
30,300
+8,800
| +41% | +$70.5K |
|
4093
PUT
Cerence
CRNC
$360M
| $258K | ﹤0.01% |
12,700
-8,700
| -41% | -$219K |
|
4094
CALL
OneWater Marine
ONEW
$210M
| $258K | ﹤0.01% |
10,100
-300
| -3% | -$8.96K |
|
4095
CALL
Woodside Energy
WDS
$44.2B
| $258K | ﹤0.01% |
11,100
+800
| +8% | +$19.5K |
|
4096
Energizer
ENR
$1.48B
| $257K | ﹤0.01% |
+8,043
| New | +$276K |
|
4097
CALL
Essential Properties Realty Trust
EPRT
$6.95B
| $257K | ﹤0.01% |
11,900
-16,900
| -59% | -$403K |
|
|
MAXN
4098
PUT
DELISTED
Maxeon Solar Technologies
MAXN
| $257K | ﹤0.01% |
222
-501
| -69% | -$952K |
|
4099
PUT
Korn Ferry
KFY
$4.34B
| $256K | ﹤0.01% |
5,400
-12,000
| -69% | -$610K |
|
4100
PUT
Pliant Therapeutics
PLRX
$66.3M
| $256K | ﹤0.01% |
14,800
+14,700
| +14,700% | +$255K |
|
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.