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 | |
|---|---|---|---|---|---|---|
5626
CALL
Stagwell
STGW
$2.09B
| $61K | ﹤0.01% |
8,500
+400
| +5% | +$2.64K |
|
5627
Teledyne Technologies
TDY
$30.4B
| $61K | ﹤0.01% |
149
-776
| -84% | -$320K |
|
|
UDMY
5628
DELISTED
Udemy
UDMY
| $61K | ﹤0.01% |
+5,709
| New | +$54.4K |
|
5629
PUT
Avnet
AVT
$7.29B
| $60K | ﹤0.01% |
1,200
-1,000
| -45% | -$44.1K |
|
|
CVAC
5630
PUT
DELISTED
CureVac
CVAC
| $60K | ﹤0.01% |
5,800
-43,900
| -88% | -$393K |
|
|
CVGW
5631
DELISTED
Calavo Growers
CVGW
| $60K | ﹤0.01% |
2,091
-10,022
| -83% | -$311K |
|
5632
CALL
Consolidated Water Co
CWCO
$467M
| $60K | ﹤0.01% |
2,500
+2,200
| +733% | +$42.6K |
|
5633
CALL
Delek Logistics
DKL
$3.21B
| $60K | ﹤0.01% |
1,100
-800
| -42% | -$40.1K |
|
5634
PUT
Encompass Health
EHC
$11B
| $60K | ﹤0.01% |
+900
| New | +$56.4K |
|
5635
First American
FAF
$7.66B
| $60K | ﹤0.01% |
1,053
-154
| -13% | -$8.7K |
|
5636
PUT
Focus Universal
FCUV
$8.15M
| $60K | ﹤0.01% |
99
| – | – |
|
5637
Funko
FNKO
$326M
| $60K | ﹤0.01% |
5,635
-8,785
| -61% | -$96.7K |
|
5638
PUT
Genesis Energy
GEL
$1.87B
| $60K | ﹤0.01% |
6,300
+1,400
| +29% | +$14.4K |
|
|
OPLN
5639
CALL
Openlane
OPLN
$4.21B
| $60K | ﹤0.01% |
4,000
-1,800
| -31% | -$26.2K |
|
5640
Kinsale Capital Group
KNSL
$8.12B
| $60K | ﹤0.01% |
+163
| New | +$54.1K |
|
5641
CALL
RAVE Restaurant Group
RAVE
$44.8M
| $60K | ﹤0.01% |
29,800
+500
| +2% | +$830 |
|
|
RENT
5642
PUT
Rent the Runway
RENT
$121M
| $60K | ﹤0.01% |
1,520
-1,635
| -52% | -$80.5K |
|
|
RPTX
5643
DELISTED
Repare Therapeutics
RPTX
| $60K | ﹤0.01% |
5,677
+4,692
| +476% | +$48.3K |
|
5644
SkyWater Technology
SKYT
$1.6B
| $60K | ﹤0.01% |
6,381
+5,252
| +465% | +$50.5K |
|
5645
PUT
Travel + Leisure Co
TNL
$4.66B
| $60K | ﹤0.01% |
1,500
+600
| +67% | +$23.1K |
|
5646
PUT
Toro Company
TTC
$8.75B
| $60K | ﹤0.01% |
600
+400
| +200% | +$41K |
|
|
VBTX
5647
CALL
DELISTED
Veritex Holdings
VBTX
| $60K | ﹤0.01% |
3,400
+1,000
| +42% | +$17.8K |
|
|
JBTM
5648
CALL
JBT Marel
JBTM
$7.21B
| $60K | ﹤0.01% |
500
+100
| +25% | +$11K |
|
|
EVA
5649
CALL
DELISTED
Enviva Inc.
EVA
| $60K | ﹤0.01% |
5,600
-7,700
| -58% | -$112K |
|
|
NEX
5650
PUT
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $60K | ﹤0.01% |
6,800
+100
| +1% | +$825 |
|
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.