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 | |
|---|---|---|---|---|---|---|
7026
PUT
LifeMD
LFMD
$186M
| $15K | ﹤0.01% |
3,500
| – | – |
|
|
LOAN
7027
PUT
Manhattan Bridge Capital
LOAN
$47.7M
| $15K | ﹤0.01% |
+3,000
| New | +$14.9K |
|
7028
PUT
Lexicon Pharmaceuticals
LXRX
$1.04B
| $15K | ﹤0.01% |
6,900
-10,500
| -60% | -$27.9K |
|
7029
Mativ Holdings
MATV
$482M
| $15K | ﹤0.01% |
+1,038
| New | +$18.4K |
|
7030
MasterBrand
MBC
$1.15B
| $15K | ﹤0.01% |
1,364
+1,058
| +346% | +$10.1K |
|
7031
Murphy USA
MUSA
$11.1B
| $15K | ﹤0.01% |
49
-1,390
| -97% | -$389K |
|
|
NAK
7032
Northern Dynasty Minerals
NAK
$812M
| $15K | ﹤0.01% |
+64,000
| New | +$14.6K |
|
7033
CALL
National Fuel Gas
NFG
$7.73B
| $15K | ﹤0.01% |
+300
| New | +$15.9K |
|
7034
PUT
Nkarta
NKTX
$159M
| $15K | ﹤0.01% |
+7,300
| New | +$32.1K |
|
7035
PUT
NexGen Energy
NXE
$6.08B
| $15K | ﹤0.01% |
3,300
-18,700
| -85% | -$75.9K |
|
7036
PUT
Outset Medical
OM
$87.5M
| $15K | ﹤0.01% |
+47
| New | +$14.3K |
|
|
PEO
7037
Adams Natural Resources Fund
PEO
$726M
| $15K | ﹤0.01% |
759
+533
| +236% | +$10.4K |
|
|
PPTA
7038
CALL
Perpetua Resources
PPTA
$2.18B
| $15K | ﹤0.01% |
4,200
-49,000
| -92% | -$225K |
|
7039
CALL
Primoris Services
PRIM
$4.28B
| $15K | ﹤0.01% |
500
-14,600
| -97% | -$391K |
|
7040
CALL
Pixelworks
PXLW
$37.2M
| $15K | ﹤0.01% |
742
+59
| +9% | +$1.14K |
|
7041
CALL
Regal Rexnord
RRX
$13.5B
| $15K | ﹤0.01% |
100
-2,200
| -96% | -$300K |
|
7042
PUT
Rayonier
RYN
$6.64B
| $15K | ﹤0.01% |
551
+220
| +66% | +$6.14K |
|
7043
PUT
Sabra Healthcare REIT
SBRA
$5.61B
| $15K | ﹤0.01% |
1,300
+1,100
| +550% | +$12.5K |
|
7044
PUT
Stellus Capital Investment Corp
SCM
$211M
| $15K | ﹤0.01% |
1,100
-800
| -42% | -$11.3K |
|
7045
SFL Corp
SFL
$1.61B
| $15K | ﹤0.01% |
1,688
-21,458
| -93% | -$194K |
|
7046
SGHC Ltd
SGHC
$7.62B
| $15K | ﹤0.01% |
5,487
+686
| +14% | +$2.42K |
|
7047
CALL
SKYX Platforms
SKYX
$155M
| $15K | ﹤0.01% |
5,800
+5,400
| +1,350% | +$17.3K |
|
7048
Silgan Holdings
SLGN
$5.07B
| $15K | ﹤0.01% |
+320
| New | +$15.6K |
|
7049
State Street SPDR Portfolio TIPS ETF
SPIP
$1.01B
| $15K | ﹤0.01% |
599
-2,471
| -80% | -$64.6K |
|
7050
CALL
Spok Holdings
SPOK
$228M
| $15K | ﹤0.01% |
1,200
-8,900
| -88% | -$112K |
|
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.