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 | |
|---|---|---|---|---|---|---|
|
LUNA
6276
PUT
DELISTED
Luna Innovations Incorporated
LUNA
| $33K | ﹤0.01% |
3,700
+2,700
| +270% | +$21.4K |
|
6277
PUT
Agree Realty
ADC
$9.42B
| $32K | ﹤0.01% |
500
-3,800
| -88% | -$251K |
|
6278
CALL
BioVie
BIVI
$10.8M
| $32K | ﹤0.01% |
75
-2
| -3% | -$1.35K |
|
|
BRAG
6279
CALL
Bragg Gaming Group
BRAG
$43.5M
| $32K | ﹤0.01% |
10,500
| – | – |
|
6280
PUT
Clarus
CLAR
$123M
| $32K | ﹤0.01% |
3,600
-2,000
| -36% | -$17.6K |
|
6281
Clarivate
CLVT
$1.29B
| $32K | ﹤0.01% |
+3,455
| New | +$29.3K |
|
6282
CALL
Conduent
CNDT
$245M
| $32K | ﹤0.01% |
9,700
-7,600
| -44% | -$24.9K |
|
6283
Diodes
DIOD
$3.77B
| $32K | ﹤0.01% |
+351
| New | +$30.9K |
|
6284
Fox Factory Holding Corp
FOXF
$747M
| $32K | ﹤0.01% |
+296
| New | +$30.3K |
|
6285
PUT
Heartland Express
HTLD
$986M
| $32K | ﹤0.01% |
2,000
+300
| +18% | +$4.68K |
|
6286
PUT
Immunome
IMNM
$2.61B
| $32K | ﹤0.01% |
4,100
-3,500
| -46% | -$19.1K |
|
6287
PUT
Lennox International
LII
$14.5B
| $32K | ﹤0.01% |
100
-500
| -83% | -$141K |
|
6288
CALL
Mistras Group
MG
$483M
| $32K | ﹤0.01% |
4,200
+3,400
| +425% | +$25.3K |
|
6289
PUT
Everspin Technologies
MRAM
$339M
| $32K | ﹤0.01% |
3,500
-2,400
| -41% | -$18.1K |
|
|
OGI
6290
CALL
Organigram Holdings
OGI
$136M
| $32K | ﹤0.01% |
20,575
-21,100
| -51% | -$40.7K |
|
6291
Oil States International
OIS
$456M
| $32K | ﹤0.01% |
+4,372
| New | +$31.9K |
|
6292
CALL
Quince Therapeutics
QNCX
$22.5M
| $32K | ﹤0.01% |
109
-23
| -17% | -$7.16K |
|
6293
PUT
Alpha Architect US Quantitative Value ETF
QVAL
$587M
| $32K | ﹤0.01% |
1,200
+1,100
| +1,100% | +$36.4K |
|
6294
Regency Centers
REG
$14.7B
| $32K | ﹤0.01% |
+528
| New | +$31.4K |
|
6295
CALL
Revolution Medicines
RVMD
$40.9B
| $32K | ﹤0.01% |
1,200
-2,000
| -63% | -$49.1K |
|
6296
PUT
Sylvamo
SLVM
$1.49B
| $32K | ﹤0.01% |
+800
| New | +$34.6K |
|
6297
CALL
Urban One Class D
UONEK
$22.1M
| $32K | ﹤0.01% |
540
-290
| -35% | -$16.5K |
|
6298
CALL
Vishay Intertechnology
VSH
$5.18B
| $32K | ﹤0.01% |
1,100
-6,900
| -86% | -$169K |
|
6299
Zeta Global
ZETA
$5.33B
| $32K | ﹤0.01% |
+3,766
| New | +$34.4K |
|
|
SILK
6300
CALL
DELISTED
Silk Road Medical, Inc. Common Stock
SILK
| $32K | ﹤0.01% |
1,000
-35,700
| -97% | -$1.3M |
|
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.