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 | |
|---|---|---|---|---|---|---|
3126
CALL
Privia Health
PRVA
$3.11B
| $595K | ﹤0.01% |
22,800
+2,300
| +11% | +$60.7K |
|
3127
CALL
Ardelyx
ARDX
$1.25B
| $594K | ﹤0.01% |
175,300
-118,500
| -40% | -$486K |
|
3128
PUT
Brookfield
BN
$103B
| $594K | ﹤0.01% |
31,500
-52,500
| -63% | -$1.11M |
|
3129
CALL
DT Midstream
DTM
$14.3B
| $594K | ﹤0.01% |
12,000
+9,200
| +329% | +$440K |
|
3130
CALL
FB Financial Corp
FBK
$2.94B
| $594K | ﹤0.01% |
21,200
| – | – |
|
3131
CALL
Seres Therapeutics
MCRB
$47M
| $593K | ﹤0.01% |
6,195
+5,710
| +1,177% | +$621K |
|
3132
CALL
Grupo Aeroportuario Centro Norte
OMAB
$5.06B
| $593K | ﹤0.01% |
+7,000
| New | +$604K |
|
3133
CALL
Bain Capital Specialty
BCSF
$815M
| $590K | ﹤0.01% |
43,700
+6,400
| +17% | +$79.1K |
|
3134
Teucrium Corn Fund
CORN
$179M
| $590K | ﹤0.01% |
26,632
+13,293
| +100% | +$319K |
|
3135
CALL
Sprout Social
SPT
$500M
| $590K | ﹤0.01% |
12,800
-23,000
| -64% | -$1.09M |
|
|
VRNA
3136
DELISTED
Verona Pharma
VRNA
| $589K | ﹤0.01% |
+27,893
| New | +$595K |
|
3137
Lincoln National
LNC
$7.88B
| $588K | ﹤0.01% |
22,855
-6,308
| -22% | -$138K |
|
3138
PUT
QuidelOrtho
QDEL
$1.15B
| $588K | ﹤0.01% |
7,100
-4,700
| -40% | -$411K |
|
3139
Vistra
VST
$53B
| $588K | ﹤0.01% |
22,401
-199,429
| -90% | -$4.87M |
|
|
TE
3140
T1 Energy
TE
$1.37B
| $588K | ﹤0.01% |
62,945
-100,664
| -62% | -$756K |
|
3141
PUT
Children's Place
PLCE
$52.9M
| $587K | ﹤0.01% |
25,300
+1,800
| +8% | +$45.8K |
|
3142
Trump Media & Technology Group
DJT
$2.65B
| $587K | ﹤0.01% |
46,789
+39,659
| +556% | +$520K |
|
3143
CALL
FMC
FMC
$1.39B
| $584K | ﹤0.01% |
5,600
-7,100
| -56% | -$798K |
|
3144
PUT
The GEO Group
GEO
$4.13B
| $584K | ﹤0.01% |
81,600
+29,500
| +57% | +$229K |
|
3145
CALL
PTC
PTC
$14.5B
| $583K | ﹤0.01% |
4,100
-83,000
| -95% | -$11M |
|
|
IPG
3146
CALL
DELISTED
Interpublic Group of Companies
IPG
| $582K | ﹤0.01% |
15,100
-36,800
| -71% | -$1.39M |
|
3147
CALL
Immunocore
IMCR
$1.72B
| $581K | ﹤0.01% |
9,700
+4,900
| +102% | +$280K |
|
|
ARR
3148
CALL
Armour Residential REIT
ARR
$2.01B
| $579K | ﹤0.01% |
21,760
+15,480
| +246% | +$395K |
|
3149
CALL
dLocal
DLO
$4.4B
| $579K | ﹤0.01% |
47,500
-88,400
| -65% | -$1.17M |
|
3150
CALL
iShares 0-5 Year Investment Grade Corporate Bond ETF
SLQD
$2.37B
| $578K | ﹤0.01% |
11,300
+6,700
| +146% | +$324K |
|
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.