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 | |
|---|---|---|---|---|---|---|
1501
CALL
QuidelOrtho
QDEL
$1.09B
| $3.79M | ﹤0.01% |
45,800
-6,900
| -13% | -$604K |
|
1502
PUT
Alexandria Real Estate Equities
ARE
$8.88B
| $3.78M | ﹤0.01% |
33,300
-19,800
| -37% | -$2.36M |
|
1503
PUT
New Oriental
EDU
$7.84B
| $3.77M | ﹤0.01% |
95,600
-73,900
| -44% | -$2.96M |
|
1504
PUT
Chemours
CC
$2.59B
| $3.77M | ﹤0.01% |
102,200
+43,900
| +75% | +$1.34M |
|
|
NKLA
1505
CALL
DELISTED
Nikola Corporation Common Stock
NKLA
| $3.77M | ﹤0.01% |
91,080
+19,693
| +28% | +$543K |
|
|
JNPR
1506
CALL
DELISTED
Juniper Networks
JNPR
| $3.77M | ﹤0.01% |
120,300
+33,700
| +39% | +$1.04M |
|
1507
CALL
Symbotic
SYM
$5.11B
| $3.76M | ﹤0.01% |
87,900
+82,400
| +1,498% | +$2.71M |
|
1508
PUT
Trump Media & Technology Group
DJT
$2.37B
| $3.76M | ﹤0.01% |
299,200
-37,700
| -11% | -$494K |
|
1509
Franco-Nevada
FNV
$41.4B
| $3.75M | ﹤0.01% |
26,335
+20,147
| +326% | +$3.02M |
|
|
HUT
1510
CALL
Hut 8
HUT
$12.4B
| $3.74M | ﹤0.01% |
226,560
-138,300
| -38% | -$1.42M |
|
1511
iShares Russell 1000 Value ETF
IWD
$82B
| $3.74M | ﹤0.01% |
+23,681
| New | +$3.62M |
|
1512
PUT
Old Dominion Freight Line
ODFL
$48.5B
| $3.73M | ﹤0.01% |
20,200
-35,000
| -63% | -$5.67M |
|
1513
PUT
Quanta Services
PWR
$93.9B
| $3.73M | ﹤0.01% |
19,000
+2,500
| +15% | +$436K |
|
1514
PUT
Pan American Silver
PAAS
$18.6B
| $3.73M | ﹤0.01% |
268,000
-101,200
| -27% | -$1.67M |
|
1515
CALL
Shake Shack
SHAK
$2.3B
| $3.73M | ﹤0.01% |
48,000
+12,000
| +33% | +$771K |
|
1516
PUT
Axsome Therapeutics
AXSM
$12.4B
| $3.72M | ﹤0.01% |
51,800
-21,300
| -29% | -$1.57M |
|
1517
CALL
Public Service Enterprise Group
PEG
$39.8B
| $3.72M | ﹤0.01% |
59,400
+17,300
| +41% | +$1.08M |
|
1518
PUT
BridgeBio Pharma
BBIO
$16.5B
| $3.71M | ﹤0.01% |
215,700
-432,900
| -67% | -$6.51M |
|
1519
SBA Communications
SBAC
$18.4B
| $3.7M | ﹤0.01% |
+15,957
| New | +$3.82M |
|
|
BLD
1520
CALL
DELISTED
TopBuild
BLD
| $3.7M | ﹤0.01% |
+13,900
| New | +$3.06M |
|
1521
CALL
Icahn Enterprises
IEP
$5.17B
| $3.69M | ﹤0.01% |
127,000
+48,400
| +62% | +$1.76M |
|
1522
PUT
Barclays
BCS
$94.1B
| $3.68M | ﹤0.01% |
468,100
+72,300
| +18% | +$560K |
|
1523
PUT
Stellantis
STLA
$16.5B
| $3.67M | ﹤0.01% |
209,200
-495,900
| -70% | -$8.32M |
|
1524
PUT
Inspire Medical Systems
INSP
$1.42B
| $3.67M | ﹤0.01% |
11,300
-2,800
| -20% | -$800K |
|
|
VTNR
1525
CALL
DELISTED
Vertex Energy, Inc
VTNR
| $3.67M | ﹤0.01% |
587,000
-329,700
| -36% | -$2.32M |
|
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.