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 | |
|---|---|---|---|---|---|---|
2151
BlackBerry
BB
$5.01B
| $1.61M | ﹤0.01% |
+291,487
| New | +$1.41M |
|
2152
PUT
Mid-America Apartment Communities
MAA
$15.6B
| $1.61M | ﹤0.01% |
10,600
-1,800
| -15% | -$270K |
|
2153
PUT
Sibanye-Stillwater
SBSW
$5.92B
| $1.61M | ﹤0.01% |
257,400
-81,600
| -24% | -$644K |
|
2154
CALL
Vornado Realty Trust
VNO
$7.47B
| $1.6M | ﹤0.01% |
88,500
+14,800
| +20% | +$218K |
|
|
MRSH
2155
Marsh
MRSH
$86.3B
| $1.6M | ﹤0.01% |
+8,529
| New | +$1.51M |
|
2156
PUT
Leonardo DRS
DRS
$12.8B
| $1.6M | ﹤0.01% |
92,500
-38,700
| -29% | -$599K |
|
2157
CALL
Graphic Packaging
GPK
$3.26B
| $1.6M | ﹤0.01% |
66,700
+7,500
| +13% | +$188K |
|
2158
CALL
Patrick Industries
PATK
$2.8B
| $1.6M | ﹤0.01% |
30,000
-150
| -0.5% | -$7.06K |
|
2159
CALL
Agilent Technologies
A
$39.1B
| $1.6M | ﹤0.01% |
13,300
-5,700
| -30% | -$726K |
|
|
QLTB
2160
CALL
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $1.6M | ﹤0.01% |
23,400
+11,400
| +95% | +$779K |
|
2161
PUT
Invesco Mortgage Capital
IVR
$776M
| $1.6M | ﹤0.01% |
139,300
+53,700
| +63% | +$574K |
|
2162
CALL
10x Genomics
TXG
$5.87B
| $1.6M | ﹤0.01% |
28,600
-18,600
| -39% | -$1.01M |
|
|
CALY
2163
Callaway Golf Company
CALY
$3.26B
| $1.6M | ﹤0.01% |
+80,440
| New | +$1.61M |
|
2164
AngloGold Ashanti
AU
$40.3B
| $1.59M | ﹤0.01% |
75,631
+55,222
| +271% | +$1.39M |
|
2165
Camtek
CAMT
$6.9B
| $1.59M | ﹤0.01% |
44,788
+2,499
| +6% | +$71.6K |
|
|
MRTX
2166
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.59M | ﹤0.01% |
44,163
+12,375
| +39% | +$510K |
|
2167
PUT
Biohaven
BHVN
$2.16B
| $1.59M | ﹤0.01% |
66,600
-66,100
| -50% | -$1.14M |
|
2168
Mattel
MAT
$4.17B
| $1.59M | ﹤0.01% |
81,543
-595
| -0.7% | -$10.7K |
|
|
HOLX
2169
DELISTED
Hologic
HOLX
| $1.59M | ﹤0.01% |
19,652
+15,199
| +341% | +$1.24M |
|
2170
CALL
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $1.59M | ﹤0.01% |
22,800
-5,500
| -19% | -$320K |
|
2171
CALL
Cerence
CRNC
$382M
| $1.59M | ﹤0.01% |
54,300
+54,000
| +18,000% | +$1.48M |
|
2172
PUT
Blink Charging
BLNK
$75.2M
| $1.59M | ﹤0.01% |
264,800
-102,800
| -28% | -$712K |
|
|
XELA
2173
CALL
DELISTED
Exela Technologies, Inc. Common Stock
XELA
| $1.59M | ﹤0.01% |
341,100
+339,354
| +19,436% | +$2.07M |
|
2174
CALL
BlackLine
BL
$1.69B
| $1.58M | ﹤0.01% |
29,400
+11,300
| +62% | +$627K |
|
2175
Moody's
MCO
$81.7B
| $1.58M | ﹤0.01% |
+4,543
| New | +$1.44M |
|
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.