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 | |
|---|---|---|---|---|---|---|
1326
CALL
Levi Strauss
LEVI
$9.44B
| $4.96M | ﹤0.01% |
343,400
+106,000
| +45% | +$1.53M |
|
1327
State Street Communication Services Select Sector SPDR ETF
XLC
$21.9B
| $4.95M | ﹤0.01% |
76,094
-90,340
| -54% | -$5.5M |
|
1328
XPeng
XPEV
$11.8B
| $4.94M | ﹤0.01% |
368,066
+366,216
| +19,795% | +$3.61M |
|
1329
CALL
Goodyear
GT
$2.07B
| $4.94M | ﹤0.01% |
387,000
+238,400
| +160% | +$2.98M |
|
1330
CALL
Warner Music
WMG
$13.8B
| $4.93M | ﹤0.01% |
188,900
+8,300
| +5% | +$230K |
|
1331
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $4.91M | ﹤0.01% |
87,400
+13,900
| +19% | +$789K |
|
1332
Regeneron Pharmaceuticals
REGN
$68.8B
| $4.9M | ﹤0.01% |
+6,817
| New | +$5.26M |
|
1333
CALL
Royalty Pharma
RPRX
$26.1B
| $4.88M | ﹤0.01% |
158,700
-36,900
| -19% | -$1.25M |
|
1334
PUT
Parker-Hannifin
PH
$125B
| $4.88M | ﹤0.01% |
12,500
-4,600
| -27% | -$1.56M |
|
1335
CALL
Ball Corp
BALL
$17B
| $4.87M | ﹤0.01% |
83,700
+20,500
| +32% | +$1.11M |
|
1336
Crocs
CROX
$6.69B
| $4.86M | ﹤0.01% |
43,261
+23,260
| +116% | +$2.77M |
|
1337
CALL
Canadian Pacific Kansas City
CP
$82B
| $4.85M | ﹤0.01% |
60,100
-34,000
| -36% | -$2.68M |
|
1338
CALL
PAR Technology
PAR
$637M
| $4.83M | ﹤0.01% |
146,800
+18,800
| +15% | +$628K |
|
|
DM
1339
PUT
DELISTED
Desktop Metal, Inc.
DM
| $4.83M | ﹤0.01% |
272,690
-8,000
| -3% | -$160K |
|
1340
CALL
Marriott Vacations Worldwide
VAC
$3.24B
| $4.82M | ﹤0.01% |
39,300
+19,900
| +103% | +$2.57M |
|
1341
Plug Power
PLUG
$2.92B
| $4.81M | ﹤0.01% |
463,413
+164,686
| +55% | +$1.5M |
|
1342
PUT
S&P Global
SPGI
$126B
| $4.81M | ﹤0.01% |
12,000
-11,700
| -49% | -$4.27M |
|
1343
PUT
Post Holdings
POST
$4.12B
| $4.81M | ﹤0.01% |
55,500
-82,000
| -60% | -$7.19M |
|
|
PR
1344
CALL
Permian Resources
PR
$17.9B
| $4.81M | ﹤0.01% |
438,700
+110,200
| +34% | +$1.13M |
|
|
IMGN
1345
PUT
DELISTED
Immunogen Inc
IMGN
| $4.79M | ﹤0.01% |
253,800
+143,600
| +130% | +$1.7M |
|
1346
CALL
Motorola Solutions
MSI
$69.4B
| $4.78M | ﹤0.01% |
16,300
+4,200
| +35% | +$1.2M |
|
1347
CALL
General Dynamics
GD
$105B
| $4.78M | ﹤0.01% |
22,200
-3,500
| -14% | -$755K |
|
1348
PUT
FT Vest Gold Strategy Target Income ETF
IGLD
$507M
| $4.77M | ﹤0.01% |
30,700
-21,300
| -41% | -$419K |
|
1349
PUT
Royal Bank of Canada
RY
$291B
| $4.75M | ﹤0.01% |
49,700
+22,900
| +85% | +$2.19M |
|
1350
CALL
Baxter International
BAX
$11.6B
| $4.72M | ﹤0.01% |
103,600
-81,000
| -44% | -$3.53M |
|
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.