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 | |
|---|---|---|---|---|---|---|
4926
PUT
Alto Ingredients
ALTO
$338M
| $113K | ﹤0.01% |
39,400
+38,400
| +3,840% | +$73.2K |
|
4927
Avery Dennison
AVY
$12.8B
| $113K | ﹤0.01% |
+661
| New | +$113K |
|
4928
CALL
Broadwind
BWEN
$81.7M
| $113K | ﹤0.01% |
29,600
+25,400
| +605% | +$106K |
|
4929
CALL
Beazer Homes USA
BZH
$888M
| $113K | ﹤0.01% |
4,000
+800
| +25% | +$16.3K |
|
4930
CALL
Daktronics
DAKT
$946M
| $113K | ﹤0.01% |
17,800
+6,100
| +52% | +$35.8K |
|
4931
CALL
eHealth
EHTH
$41.9M
| $113K | ﹤0.01% |
14,100
+6,400
| +83% | +$51.2K |
|
4932
LPL Financial
LPLA
$27B
| $113K | ﹤0.01% |
522
-6,266
| -92% | -$1.25M |
|
4933
MediaAlpha
MAX
$746M
| $113K | ﹤0.01% |
+11,008
| New | +$99.5K |
|
4934
Magnolia Oil & Gas
MGY
$5.93B
| $113K | ﹤0.01% |
5,431
+3,440
| +173% | +$71.1K |
|
4935
PUT
Old Republic International
ORI
$10.9B
| $113K | ﹤0.01% |
4,500
-5,700
| -56% | -$143K |
|
|
RDNW
4936
RideNow Group
RDNW
$256M
| $113K | ﹤0.01% |
9,189
+5,817
| +173% | +$54.3K |
|
4937
abrdn Physical Gold Shares ETF
SGOL
$6.9B
| $113K | ﹤0.01% |
6,171
-22,429
| -78% | -$425K |
|
|
TGNA
4938
CALL
DELISTED
TEGNA Inc
TGNA
| $113K | ﹤0.01% |
7,000
-4,300
| -38% | -$70.1K |
|
|
RXDX
4939
CALL
DELISTED
Prometheus Biosciences, Inc. Common Stock
RXDX
| $113K | ﹤0.01% |
7,000
-32,900
| -82% | -$5.96M |
|
|
CMRC
4940
CALL
Commerce.com Inc Series 1
CMRC
$272M
| $112K | ﹤0.01% |
11,300
-3,000
| -21% | -$25K |
|
4941
CALL
BlackSky Technology
BKSY
$843M
| $112K | ﹤0.01% |
6,363
-325
| -5% | -$3.88K |
|
4942
Endava
DAVA
$165M
| $112K | ﹤0.01% |
2,181
+2,179
| +108,950% | +$117K |
|
4943
KraneShares MSCI China Clean Technology Index ETF
KGRN
$54.2M
| $112K | ﹤0.01% |
4,029
+2,552
| +173% | +$68K |
|
4944
CALL
Liberty Broadband Class C
LBRDK
$4.89B
| $112K | ﹤0.01% |
1,400
+1,300
| +1,300% | +$101K |
|
4945
Mid-America Apartment Communities
MAA
$16B
| $112K | ﹤0.01% |
739
-922
| -56% | -$139K |
|
|
NEWP
4946
New Pacific Metals
NEWP
$809M
| $112K | ﹤0.01% |
51,743
+31,273
| +153% | +$76.5K |
|
4947
CALL
Ormat Technologies
ORA
$5.8B
| $112K | ﹤0.01% |
1,400
-7,100
| -84% | -$601K |
|
4948
CALL
Sensata Technologies
ST
$6.69B
| $112K | ﹤0.01% |
2,500
-8,200
| -77% | -$360K |
|
4949
STAG Industrial
STAG
$7.5B
| $112K | ﹤0.01% |
3,130
-222
| -7% | -$7.67K |
|
4950
PUT
Uranium Energy
UEC
$4.47B
| $112K | ﹤0.01% |
33,100
-26,700
| -45% | -$76.2K |
|
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.