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 | |
|---|---|---|---|---|---|---|
|
CVAC
4326
DELISTED
CureVac
CVAC
| $193K | ﹤0.01% |
18,618
+13,543
| +267% | +$121K |
|
4327
FuelCell Energy
FCEL
$1.45B
| $193K | ﹤0.01% |
+2,990
| New | +$203K |
|
4328
CALL
Gain Therapeutics
GANX
$72.1M
| $193K | ﹤0.01% |
43,200
-2,800
| -6% | -$13.7K |
|
|
SNV
4329
CALL
DELISTED
Synovus
SNV
| $193K | ﹤0.01% |
6,400
-41,500
| -87% | -$1.21M |
|
4330
CALL
Simpson Manufacturing
SSD
$7.79B
| $193K | ﹤0.01% |
1,400
+200
| +17% | +$24.6K |
|
4331
Wolverine World Wide
WWW
$1.68B
| $193K | ﹤0.01% |
+13,185
| New | +$202K |
|
|
NETI
4332
PUT
DELISTED
Eneti Inc.
NETI
| $193K | ﹤0.01% |
16,000
+3,300
| +26% | +$32.2K |
|
|
SI
4333
CALL
DELISTED
Silvergate Capital Corporation
SI
| $193K | ﹤0.01% |
276,900
-306,300
| -53% | -$433K |
|
4334
CALL
Kopin
KOPN
$586M
| $192K | ﹤0.01% |
89,500
-8,000
| -8% | -$12K |
|
4335
CALL
ReNew
RNW
$2.18B
| $192K | ﹤0.01% |
35,200
+34,200
| +3,420% | +$187K |
|
4336
Selective Insurance
SIGI
$5.76B
| $192K | ﹤0.01% |
2,006
+178
| +10% | +$17.5K |
|
4337
PUT
Vuzix
VUZI
$178M
| $192K | ﹤0.01% |
37,800
+1,000
| +3% | +$4.43K |
|
4338
PUT
X4 Pharmaceuticals
XFOR
$377M
| $192K | ﹤0.01% |
3,313
+2,656
| +404% | +$136K |
|
|
ME
4339
CALL
DELISTED
23andMe Holding Co
ME
| $192K | ﹤0.01% |
5,490
-165
| -3% | -$6.57K |
|
4340
CALL
Beam Therapeutics
BEAM
$2.68B
| $191K | ﹤0.01% |
6,000
-1,500
| -20% | -$48.7K |
|
|
CIO
4341
DELISTED
City Office REIT
CIO
| $191K | ﹤0.01% |
34,391
+32,284
| +1,532% | +$176K |
|
4342
CALL
Flux Power
FLUX
$10.9M
| $191K | ﹤0.01% |
44,400
-33,400
| -43% | -$130K |
|
4343
PUT
Ichor Holdings
ICHR
$2.17B
| $191K | ﹤0.01% |
5,100
+400
| +9% | +$12.5K |
|
4344
Direxion Daily FTSE China Bear 3X ETF
YANG
$85.3M
| $191K | ﹤0.01% |
873
-4,504
| -84% | -$952K |
|
4345
BRC Inc
BRCC
$122M
| $190K | ﹤0.01% |
+37,014
| New | +$196K |
|
4346
CALL
Pathward Financial
CASH
$1.88B
| $190K | ﹤0.01% |
4,100
-800
| -16% | -$35.9K |
|
4347
PUT
Harmony Biosciences
HRMY
$2.08B
| $190K | ﹤0.01% |
5,400
-1,400
| -21% | -$48.3K |
|
|
BPMC
4348
CALL
DELISTED
Blueprint Medicines
BPMC
| $189K | ﹤0.01% |
3,000
-29,500
| -91% | -$1.6M |
|
4349
PUT
Hudbay
HBM
$9.76B
| $189K | ﹤0.01% |
39,500
+29,000
| +276% | +$142K |
|
|
NNDM
4350
PUT
Nano Dimension
NNDM
$314M
| $189K | ﹤0.01% |
65,400
-1,200
| -2% | -$2.97K |
|
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.