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 | |
|---|---|---|---|---|---|---|
|
ABB
2076
PUT
DELISTED
ABB Ltd
ABB
| $1.76M | ﹤0.01% |
44,700
-16,300
| -27% | -$581K |
|
2077
PUT
AMN Healthcare
AMN
$1.28B
| $1.76M | ﹤0.01% |
16,100
+9,800
| +156% | +$929K |
|
2078
PUT
Symbotic
SYM
$5.11B
| $1.75M | ﹤0.01% |
40,900
+34,200
| +510% | +$1.12M |
|
2079
CALL
OneMain Financial
OMF
$6.9B
| $1.75M | ﹤0.01% |
40,000
+15,900
| +66% | +$620K |
|
|
RDFN
2080
PUT
DELISTED
Redfin
RDFN
| $1.75M | ﹤0.01% |
140,700
+39,900
| +40% | +$389K |
|
2081
PUT
Axcelis
ACLS
$4.12B
| $1.74M | ﹤0.01% |
9,500
+9,000
| +1,800% | +$1.3M |
|
2082
PUT
LPL Financial
LPLA
$26.3B
| $1.74M | ﹤0.01% |
8,000
-29,100
| -78% | -$5.83M |
|
2083
CALL
Dycom Industries
DY
$12.9B
| $1.74M | ﹤0.01% |
15,300
+1,700
| +13% | +$168K |
|
2084
PUT
Banco Bradesco
BBD
$38.1B
| $1.73M | ﹤0.01% |
500,750
+22,800
| +5% | +$70.4K |
|
2085
CALL
Ollie's Bargain Outlet
OLLI
$4.01B
| $1.73M | ﹤0.01% |
29,900
+100
| +0.3% | +$6.16K |
|
|
ONC
2086
CALL
BeOne Medicines Ltd
ONC
$33.8B
| $1.73M | ﹤0.01% |
9,700
-1,600
| -14% | -$368K |
|
2087
CALL
New York Times
NYT
$11.6B
| $1.73M | ﹤0.01% |
43,900
+24,500
| +126% | +$932K |
|
2088
Waste Management
WM
$95.9B
| $1.73M | ﹤0.01% |
+9,964
| New | +$1.65M |
|
2089
PUT
Bumble
BMBL
$367M
| $1.73M | ﹤0.01% |
102,900
+8,700
| +9% | +$150K |
|
2090
CALL
Ryanair
RYAAY
$29.5B
| $1.73M | ﹤0.01% |
39,000
+38,500
| +7,700% | +$1.55M |
|
2091
CALL
Brookfield Infrastructure
BIPC
$5.11B
| $1.72M | ﹤0.01% |
37,800
+34,300
| +980% | +$1.56M |
|
2092
CALL
Cincinnati Financial
CINF
$28.3B
| $1.72M | ﹤0.01% |
17,700
+15,800
| +832% | +$1.63M |
|
|
HTGCR
2093
CALL
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $1.72M | ﹤0.01% |
116,400
-24,100
| -17% | -$357K |
|
2094
CALL
Par Pacific Holdings
PARR
$3.88B
| $1.72M | ﹤0.01% |
64,700
+12,100
| +23% | +$286K |
|
2095
PUT
Cullen/Frost Bankers
CFR
$10.3B
| $1.72M | ﹤0.01% |
16,000
-4,600
| -22% | -$480K |
|
2096
PUT
Silicon Laboratories
SLAB
$7.15B
| $1.72M | ﹤0.01% |
10,900
+10,700
| +5,350% | +$1.62M |
|
2097
PUT
Weyerhaeuser
WY
$17.3B
| $1.72M | ﹤0.01% |
51,300
-11,700
| -19% | -$352K |
|
2098
CALL
Tidewater
TDW
$3.91B
| $1.72M | ﹤0.01% |
31,000
-6,700
| -18% | -$307K |
|
2099
CALL
Copart
CPRT
$25.9B
| $1.71M | ﹤0.01% |
37,600
-1,200
| -3% | -$49.7K |
|
|
CHGX
2100
PUT
DELISTED
AXS Change Finance ESG ETF
CHGX
| $1.71M | ﹤0.01% |
80,000
+71,600
| +852% | +$2.11M |
|
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.