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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3401
CubeSmart
CUBE
$9.77B
| $459K | ﹤0.01% |
+10,279
| New | +$467K |
|
3402
Polestar Automotive Holding UK
PSNY
$2.06B
| $459K | ﹤0.01% |
4,012
-1,123
| -22% | -$121K |
|
|
LTC
3403
CALL
LTC Properties
LTC
$2.16B
| $458K | ﹤0.01% |
13,900
-7,100
| -34% | -$237K |
|
3404
CALL
CenterPoint Energy
CNP
$29.3B
| $457K | ﹤0.01% |
15,700
+9,200
| +142% | +$272K |
|
3405
Hecla Mining
HL
$9.77B
| $457K | ﹤0.01% |
88,888
-60,851
| -41% | -$348K |
|
|
IRBT
3406
CALL
DELISTED
iRobot
IRBT
| $457K | ﹤0.01% |
10,100
-34,200
| -77% | -$1.37M |
|
3407
PUT
Mattel
MAT
$4.47B
| $457K | ﹤0.01% |
23,400
+2,400
| +11% | +$43.4K |
|
3408
CALL
Cue Biopharma
CUE
$130M
| $456K | ﹤0.01% |
4,170
+3,477
| +502% | +$409K |
|
3409
PUT
Genuine Parts
GPC
$18B
| $456K | ﹤0.01% |
2,700
-1,000
| -27% | -$164K |
|
3410
PUT
Owens Corning
OC
$11.7B
| $456K | ﹤0.01% |
3,500
| – | – |
|
3411
CALL
Amkor Technology
AMKR
$11.4B
| $455K | ﹤0.01% |
15,300
+7,100
| +87% | +$173K |
|
3412
PUT
B&G Foods
BGS
$301M
| $455K | ﹤0.01% |
32,700
-185,200
| -85% | -$2.66M |
|
3413
CALL
Genesco
GCO
$422M
| $455K | ﹤0.01% |
18,200
+13,100
| +257% | +$379K |
|
|
AJRD
3414
CALL
DELISTED
Aerojet Rocketdyne Holdings
AJRD
| $455K | ﹤0.01% |
8,300
-1,300
| -14% | -$72.2K |
|
3415
PUT
Blue Bird Corp
BLBD
$2.27B
| $454K | ﹤0.01% |
20,200
+15,000
| +288% | +$321K |
|
3416
CALL
MKS Inc
MKSI
$18.9B
| $454K | ﹤0.01% |
4,200
+900
| +27% | +$82.4K |
|
3417
Vanguard High Dividend Yield ETF
VYM
$82.1B
| $454K | ﹤0.01% |
+4,283
| New | +$449K |
|
|
PDCE
3418
DELISTED
PDC Energy, Inc.
PDCE
| $453K | ﹤0.01% |
+6,381
| New | +$431K |
|
|
RADI
3419
CALL
DELISTED
Radius Global Infrastructure, Inc. Class A Common Stock
RADI
| $452K | ﹤0.01% |
30,400
-61,000
| -67% | -$900K |
|
3420
PUT
Jones Lang LaSalle
JLL
$15.9B
| $451K | ﹤0.01% |
2,900
+2,800
| +2,800% | +$397K |
|
3421
Restaurant Brands International
QSR
$26.1B
| $451K | ﹤0.01% |
+5,827
| New | +$421K |
|
3422
CALL
ADMA Biologics
ADMA
$2B
| $449K | ﹤0.01% |
121,700
-146,800
| -55% | -$544K |
|
|
BLDP
3423
CALL
Ballard Power Systems
BLDP
$823M
| $449K | ﹤0.01% |
103,100
-7,200
| -7% | -$32.8K |
|
3424
iShares Gold Trust
IAU
$62.7B
| $449K | ﹤0.01% |
+12,360
| New | +$463K |
|
|
VRE
3425
DELISTED
Veris Residential
VRE
| $449K | ﹤0.01% |
27,978
+21,232
| +315% | +$343K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.