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 | |
|---|---|---|---|---|---|---|
6976
PUT
Manitowoc
MTW
$501M
| $16K | ﹤0.01% |
900
-5,300
| -85% | -$85.5K |
|
6977
CALL
NovaGold Resources
NG
$2.51B
| $16K | ﹤0.01% |
4,200
+2,500
| +147% | +$13.4K |
|
|
NGD
6978
DELISTED
New Gold Inc
NGD
| $16K | ﹤0.01% |
15,651
+11,584
| +285% | +$14.3K |
|
|
NMG
6979
CALL
Nouveau Monde Graphite
NMG
$431M
| $16K | ﹤0.01% |
5,400
-1,600
| -23% | -$5.87K |
|
6980
Invesco Dorsey Wright Momentum ETF
PDP
$1.4B
| $16K | ﹤0.01% |
+200
| New | +$15.2K |
|
6981
CALL
Praxis Precision Medicines
PRAX
$8.14B
| $16K | ﹤0.01% |
953
+433
| +83% | +$6.63K |
|
6982
Invesco FTSE RAFI US 1000 ETF
PRF
$9.79B
| $16K | ﹤0.01% |
+500
| New | +$15.8K |
|
6983
Quantum-Si Incorporated
QSI
$165M
| $16K | ﹤0.01% |
9,322
+4,043
| +77% | +$6.33K |
|
6984
PUT
Remitly
RELY
$4.93B
| $16K | ﹤0.01% |
900
-400
| -31% | -$7.27K |
|
6985
PUT
SLM Corp
SLM
$4.75B
| $16K | ﹤0.01% |
1,000
-13,400
| -93% | -$204K |
|
6986
StoneX
SNEX
$8.74B
| $16K | ﹤0.01% |
+1,033
| New | +$18.4K |
|
6987
Star Holdings Shares of Beneficial Interest
STHO
$112M
| $16K | ﹤0.01% |
+1,096
| New | +$17.4K |
|
6988
CALL
Tucows
TCX
$103M
| $16K | ﹤0.01% |
600
+300
| +100% | +$7.74K |
|
|
TGB
6989
PUT
Trekor Metals
TGB
$2.44B
| $16K | ﹤0.01% |
11,500
-3,900
| -25% | -$5.84K |
|
|
THR
6990
DELISTED
Thermon Group Holdings
THR
| $16K | ﹤0.01% |
632
-738
| -54% | -$17.1K |
|
6991
CALL
FlexShares Morningstar US Market Factors Tilt Index Fund
TILT
$2.18B
| $16K | ﹤0.01% |
400
-1,100
| -73% | -$175K |
|
6992
Turning Point Brands
TPB
$1.51B
| $16K | ﹤0.01% |
+671
| New | +$15.1K |
|
6993
CALL
Tetra Tech
TTEK
$8.77B
| $16K | ﹤0.01% |
+500
| New | +$14.7K |
|
|
6994
PUT
Tetra Tech
TTEK
$8.77B
| $16K | ﹤0.01% |
500
-1,500
| -75% | -$44.1K |
|
6995
PUT
Travere Therapeutics
TVTX
$5.11B
| $16K | ﹤0.01% |
1,100
-13,600
| -93% | -$247K |
|
6996
VirTra
VTSI
$33.1M
| $16K | ﹤0.01% |
2,164
-766
| -26% | -$5.11K |
|
6997
CALL
Worksport
WKSP
$8.9M
| $16K | ﹤0.01% |
680
+430
| +172% | +$9.36K |
|
6998
CALL
Zai Lab
ZLAB
$2.05B
| $16K | ﹤0.01% |
600
-5,900
| -91% | -$193K |
|
|
SMC
6999
PUT
Summit Midstream
SMC
$412M
| $16K | ﹤0.01% |
1,000
+500
| +100% | +$7.7K |
|
|
INVX
7000
Innovex International
INVX
$1.8B
| $16K | ﹤0.01% |
+725
| New | +$18.5K |
|
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.