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 | |
|---|---|---|---|---|---|---|
4301
CALL
MBIA
MBI
$275M
| $209K | ﹤0.01% |
29,000
-51,500
| -64% | -$429K |
|
4302
PUT
Napco Security Technologies
NSSC
$1.3B
| $209K | ﹤0.01% |
9,400
+8,300
| +755% | +$252K |
|
4303
PDS Biotechnology
PDSB
$37.4M
| $209K | ﹤0.01% |
41,539
-1,734
| -4% | -$9.5K |
|
|
SAND
4304
PUT
DELISTED
Sandstorm Gold
SAND
| $209K | ﹤0.01% |
44,900
+4,800
| +12% | +$25.2K |
|
4305
PUT
Vanguard FTSE Developed Markets ETF
VEA
$223B
| $209K | ﹤0.01% |
4,800
-600
| -11% | -$27.5K |
|
4306
CALL
Concentrix
CNXC
$1.62B
| $208K | ﹤0.01% |
2,600
-18,200
| -88% | -$1.43M |
|
4307
Dover
DOV
$26.7B
| $208K | ﹤0.01% |
1,492
+681
| +84% | +$98.3K |
|
4308
CALL
Quaker Houghton
KWR
$2.58B
| $208K | ﹤0.01% |
1,300
-100
| -7% | -$17.9K |
|
4309
Powell Industries
POWL
$6.79B
| $208K | ﹤0.01% |
7,563
+7,350
| +3,451% | +$182K |
|
|
RVPH
4310
CALL
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $208K | ﹤0.01% |
2,140
+650
| +44% | +$60.6K |
|
|
ERF
4311
PUT
DELISTED
Enerplus Corporation
ERF
| $208K | ﹤0.01% |
11,800
-200
| -2% | -$3.31K |
|
4312
PUT
Booz Allen Hamilton
BAH
$8.44B
| $207K | ﹤0.01% |
1,900
-2,100
| -53% | -$241K |
|
4313
Boot Barn
BOOT
$4.58B
| $206K | ﹤0.01% |
+2,545
| New | +$229K |
|
4314
CALL
National Beverage
FIZZ
$3.06B
| $206K | ﹤0.01% |
4,400
+3,800
| +633% | +$192K |
|
4315
PUT
Fluence Energy
FLNC
$1.58B
| $206K | ﹤0.01% |
9,000
-14,500
| -62% | -$374K |
|
|
HIMX
4316
PUT
Himax Technologies
HIMX
$2.03B
| $206K | ﹤0.01% |
35,400
-15,700
| -31% | -$101K |
|
4317
PUT
Helmerich & Payne
HP
$3.34B
| $206K | ﹤0.01% |
4,900
-4,700
| -49% | -$196K |
|
4318
SoundHound AI
SOUN
$2.48B
| $206K | ﹤0.01% |
+102,496
| New | +$261K |
|
4319
PUT
WEX
WEX
$6.42B
| $206K | ﹤0.01% |
1,100
+800
| +267% | +$154K |
|
|
ESMT
4320
DELISTED
EngageSmart, Inc.
ESMT
| $206K | ﹤0.01% |
11,457
-16,309
| -59% | -$291K |
|
4321
CALL
KB Financial Group
KB
$39.5B
| $205K | ﹤0.01% |
5,000
+2,600
| +108% | +$103K |
|
|
SCS
4322
PUT
DELISTED
Steelcase
SCS
| $205K | ﹤0.01% |
18,400
+5,400
| +42% | +$47.3K |
|
|
SF
4323
Stifel
SF
$12.4B
| $205K | ﹤0.01% |
+5,006
| New | +$211K |
|
4324
CALL
Simplify US Equity PLUS Convexity ETF
SPYC
$109M
| $205K | ﹤0.01% |
4,300
+1,800
| +72% | +$52.4K |
|
4325
Tradr TSLA Bear Daily ETF
TSLQ
$156M
| $205K | ﹤0.01% |
352
+193
| +121% | +$113K |
|
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.