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 | |
|---|---|---|---|---|---|---|
4151
PUT
Cadre Holdings
CDRE
$1.33B
| $228K | ﹤0.01% |
10,500
+10,000
| +2,000% | +$213K |
|
4152
CALL
Citius Pharmaceuticals
CTXR
$14.6M
| $228K | ﹤0.01% |
7,616
+840
| +12% | +$27.6K |
|
4153
PUT
DHT Holdings
DHT
$3B
| $228K | ﹤0.01% |
26,800
-113,900
| -81% | -$998K |
|
4154
PUT
Park Hotels & Resorts
PK
$3.06B
| $228K | ﹤0.01% |
17,800
+12,700
| +249% | +$162K |
|
4155
ProShares Short Russell2000
RWM
$134M
| $228K | ﹤0.01% |
9,992
+8,174
| +450% | +$197K |
|
|
TGNA
4156
PUT
DELISTED
TEGNA Inc
TGNA
| $228K | ﹤0.01% |
14,100
-30,500
| -68% | -$497K |
|
4157
PUT
Watsco Inc
WSO
$12.7B
| $228K | ﹤0.01% |
600
+400
| +200% | +$136K |
|
4158
ProFrac Holding
ACDC
$644M
| $227K | ﹤0.01% |
+20,416
| New | +$242K |
|
4159
CALL
HealthEquity
HQY
$8.69B
| $227K | ﹤0.01% |
3,600
-24,100
| -87% | -$1.4M |
|
4160
PUT
Legend Biotech
LEGN
$3.64B
| $227K | ﹤0.01% |
3,300
+1,400
| +74% | +$91.5K |
|
4161
PUT
Transact Technologies
TACT
$50.1M
| $227K | ﹤0.01% |
25,400
-91,800
| -78% | -$647K |
|
4162
CALL
Twist Bioscience
TWST
$5.18B
| $227K | ﹤0.01% |
11,100
-21,600
| -66% | -$324K |
|
4163
PUT
Vanguard Total Bond Market
BND
$158B
| $226K | ﹤0.01% |
3,100
+1,300
| +72% | +$95.2K |
|
4164
Mitsubishi UFJ Financial
MUFG
$249B
| $226K | ﹤0.01% |
30,739
-3,799
| -11% | -$25.3K |
|
4165
Vaalco Energy
EGY
$556M
| $225K | ﹤0.01% |
60,059
+23,239
| +63% | +$94.8K |
|
|
KW
4166
CALL
DELISTED
Kennedy-Wilson Holdings
KW
| $225K | ﹤0.01% |
13,800
+13,100
| +1,871% | +$209K |
|
4167
Lazard
LAZ
$3.99B
| $225K | ﹤0.01% |
+7,052
| New | +$218K |
|
4168
CALL
Magnolia Oil & Gas
MGY
$5.86B
| $225K | ﹤0.01% |
10,800
-15,700
| -59% | -$325K |
|
4169
Oric Pharmaceuticals
ORIC
$1.17B
| $225K | ﹤0.01% |
29,017
+28,630
| +7,398% | +$163K |
|
4170
PUT
Viper Energy
VNOM
$8.42B
| $225K | ﹤0.01% |
8,400
+4,400
| +110% | +$120K |
|
|
TUZ
4171
CALL
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $225K | ﹤0.01% |
3,700
+3,300
| +825% | +$201K |
|
4172
PUT
Evolution Petroleum
EPM
$131M
| $224K | ﹤0.01% |
27,800
+3,300
| +13% | +$24.4K |
|
4173
PUT
Liberty Broadband Class C
LBRDK
$4.85B
| $224K | ﹤0.01% |
2,800
+1,000
| +56% | +$77.3K |
|
4174
SS&C Technologies
SSNC
$19.3B
| $224K | ﹤0.01% |
3,702
-24,147
| -87% | -$1.37M |
|
4175
iShares Broad USD High Yield Corporate Bond ETF
USHY
$29.2B
| $224K | ﹤0.01% |
6,372
+6,320
| +12,154% | +$222K |
|
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.