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 | |
|---|---|---|---|---|---|---|
|
AMAM
4251
CALL
DELISTED
Ambrx Biopharma Inc
AMAM
| $209K | ﹤0.01% |
12,700
+6,700
| +112% | +$84.2K |
|
4252
CALL
Power Integrations
POWI
$3.16B
| $208K | ﹤0.01% |
2,200
| – | – |
|
|
SA
4253
Seabridge Gold
SA
$2.73B
| $208K | ﹤0.01% |
17,315
+10,091
| +140% | +$137K |
|
4254
TG Therapeutics
TGTX
$8.25B
| $208K | ﹤0.01% |
8,385
-62,285
| -88% | -$1.61M |
|
4255
PUT
Tilray
TLRY
$484M
| $208K | ﹤0.01% |
13,340
-20,600
| -61% | -$442K |
|
4256
CALL
Veritone
VERI
$92M
| $208K | ﹤0.01% |
53,200
-9,700
| -15% | -$42.3K |
|
|
LUNA
4257
CALL
DELISTED
Luna Innovations Incorporated
LUNA
| $208K | ﹤0.01% |
22,900
+12,300
| +116% | +$97.4K |
|
4258
ARK Autonomous Technology & Robotics ETF
ARKQ
$1.82B
| $207K | ﹤0.01% |
+3,685
| New | +$183K |
|
4259
CALL
Hamilton Lane
HLNE
$3.89B
| $207K | ﹤0.01% |
+2,600
| New | +$187K |
|
4260
ProShares Short Bitcoin Strategy ETF
BITI
$105M
| $206K | ﹤0.01% |
2,191
+1,321
| +152% | +$138K |
|
|
MCW
4261
DELISTED
Mister Car Wash
MCW
| $206K | ﹤0.01% |
+21,400
| New | +$186K |
|
4262
PUT
Pentair
PNR
$10.7B
| $206K | ﹤0.01% |
3,200
-2,600
| -45% | -$150K |
|
4263
PUT
Funko
FNKO
$349M
| $205K | ﹤0.01% |
19,000
-1,200
| -6% | -$13.2K |
|
4264
CALL
Innodata
INOD
$1.82B
| $205K | ﹤0.01% |
18,100
+4,300
| +31% | +$40K |
|
4265
Alliant Energy
LNT
$18.6B
| $205K | ﹤0.01% |
3,925
-40,086
| -91% | -$2.15M |
|
|
SAND
4266
PUT
DELISTED
Sandstorm Gold
SAND
| $205K | ﹤0.01% |
40,100
+6,000
| +18% | +$33.4K |
|
4267
PUT
USA Compression Partners
USAC
$3.69B
| $205K | ﹤0.01% |
10,400
-6,500
| -38% | -$131K |
|
4268
Vanguard Russell 2000 ETF
VTWO
$17.2B
| $205K | ﹤0.01% |
2,714
+519
| +24% | +$37.4K |
|
4269
CALL
Bioventus
BVS
$901M
| $204K | ﹤0.01% |
70,700
+63,500
| +882% | +$122K |
|
4270
CALL
Fathom Holdings
FTHM
$26.6M
| $204K | ﹤0.01% |
28,600
+24,900
| +673% | +$139K |
|
4271
CALL
Insight Enterprises
NSIT
$3.88B
| $204K | ﹤0.01% |
1,400
+700
| +100% | +$94K |
|
4272
CALL
Principal Financial Group
PFG
$24.3B
| $204K | ﹤0.01% |
2,700
-3,300
| -55% | -$238K |
|
|
SLCA
4273
PUT
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $204K | ﹤0.01% |
16,900
-30,300
| -64% | -$374K |
|
4274
Bain Capital Specialty
BCSF
$823M
| $203K | ﹤0.01% |
15,059
-10,163
| -40% | -$126K |
|
4275
FIGS
FIGS
$1.79B
| $203K | ﹤0.01% |
+24,558
| New | +$187K |
|
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.