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 | |
|---|---|---|---|---|---|---|
5351
CALL
Advanced Energy
AEIS
$11B
| $78K | ﹤0.01% |
700
-300
| -30% | -$28.6K |
|
|
AEVA
5352
Aeva Technologies
AEVA
$1.13B
| $78K | ﹤0.01% |
12,552
+6,967
| +125% | +$39.7K |
|
|
CMRC
5353
PUT
Commerce.com Inc Series 1
CMRC
$261M
| $78K | ﹤0.01% |
7,900
-3,200
| -29% | -$26.7K |
|
5354
CALL
Clearwater Paper
CLW
$341M
| $78K | ﹤0.01% |
+2,500
| New | +$80.7K |
|
5355
CALL
Foghorn Therapeutics
FHTX
$278M
| $78K | ﹤0.01% |
+11,100
| New | +$77.6K |
|
5356
CALL
Hilltop Holdings
HTH
$2.26B
| $78K | ﹤0.01% |
2,500
-2,000
| -44% | -$61.2K |
|
5357
PUT
Kimco Realty
KIM
$17.2B
| $78K | ﹤0.01% |
4,000
-6,000
| -60% | -$113K |
|
5358
PUT
Noble Corp
NE
$6.62B
| $78K | ﹤0.01% |
1,900
-71,600
| -97% | -$2.76M |
|
5359
Rollins
ROL
$18.5B
| $78K | ﹤0.01% |
1,832
-9,373
| -84% | -$381K |
|
5360
CALL
Ultrapar
UGP
$6.9B
| $78K | ﹤0.01% |
20,000
+13,800
| +223% | +$45.4K |
|
5361
W&T Offshore
WTI
$515M
| $78K | ﹤0.01% |
20,362
-30,224
| -60% | -$130K |
|
5362
CALL
Achieve Life Sciences
ACHV
$647M
| $77K | ﹤0.01% |
14,900
+3,400
| +30% | +$23.8K |
|
|
AMRN
5363
CALL
Amarin Corp
AMRN
$298M
| $77K | ﹤0.01% |
3,255
-2,070
| -39% | -$53.2K |
|
5364
Appian
APPN
$1.94B
| $77K | ﹤0.01% |
1,623
+923
| +132% | +$38.9K |
|
5365
PUT
Arlo Technologies
ARLO
$1.57B
| $77K | ﹤0.01% |
+7,100
| New | +$57.7K |
|
|
CIO
5366
PUT
DELISTED
City Office REIT
CIO
| $77K | ﹤0.01% |
14,000
+8,300
| +146% | +$45.3K |
|
5367
CALL
Curis
CRIS
$9.67M
| $77K | ﹤0.01% |
233
+23
| +11% | +$7.48K |
|
5368
Liberty Media Series A
FWONA
$23.1B
| $77K | ﹤0.01% |
1,195
+766
| +179% | +$48.4K |
|
|
GRFS
5369
PUT
Grifois
GRFS
$5.58B
| $77K | ﹤0.01% |
8,500
+4,900
| +136% | +$40.4K |
|
|
RJET
5370
PUT
Republic Airways Holdings
RJET
$1.02B
| $77K | ﹤0.01% |
2,013
+1,953
| +3,255% | +$59.9K |
|
5371
CALL
Rafael Holdings
RFL
$104M
| $77K | ﹤0.01% |
37,619
-12,777
| -25% | -$25.5K |
|
5372
PUT
Revolution Medicines
RVMD
$40.9B
| $77K | ﹤0.01% |
2,900
-1,100
| -28% | -$27K |
|
5373
PUT
Ryanair
RYAAY
$31.2B
| $77K | ﹤0.01% |
1,750
-750
| -30% | -$30.2K |
|
5374
Invesco S&P 500 High Beta ETF
SPHB
$970M
| $77K | ﹤0.01% |
+1,012
| New | +$70.4K |
|
|
TPIC
5375
CALL
DELISTED
TPI Composites
TPIC
| $77K | ﹤0.01% |
7,500
+200
| +3% | +$2.24K |
|
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.