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 | |
|---|---|---|---|---|---|---|
1276
PUT
PPG Industries
PPG
$25.9B
| $5.31M | ﹤0.01% |
35,800
+26,400
| +281% | +$3.68M |
|
1277
CALL
Vulcan Materials
VMC
$36.2B
| $5.3M | ﹤0.01% |
23,500
+13,700
| +140% | +$2.63M |
|
1278
CALL
Royal Bank of Canada
RY
$290B
| $5.28M | ﹤0.01% |
55,300
+19,700
| +55% | +$1.88M |
|
1279
CALL
Entegris
ENTG
$19.6B
| $5.26M | ﹤0.01% |
47,500
+24,900
| +110% | +$2.27M |
|
1280
CALL
Boot Barn
BOOT
$4.57B
| $5.25M | ﹤0.01% |
62,000
+61,400
| +10,233% | +$4.5M |
|
1281
PUT
Yelp
YELP
$1.4B
| $5.23M | ﹤0.01% |
143,700
+136,800
| +1,983% | +$4.41M |
|
1282
PUT
Fortinet
FTNT
$112B
| $5.23M | ﹤0.01% |
69,200
-44,000
| -39% | -$2.99M |
|
1283
Madrigal Pharmaceuticals
MDGL
$12.5B
| $5.23M | ﹤0.01% |
22,642
+10,278
| +83% | +$2.78M |
|
1284
CALL
Arbor Realty Trust
ABR
$968M
| $5.21M | ﹤0.01% |
351,800
-85,600
| -20% | -$1.06M |
|
1285
CALL
Allegro MicroSystems
ALGM
$8.5B
| $5.2M | ﹤0.01% |
115,300
-88,400
| -43% | -$3.58M |
|
1286
VanEck Junior Gold Miners ETF
GDXJ
$7.03B
| $5.19M | ﹤0.01% |
+145,671
| New | +$5.66M |
|
|
NOVA
1287
PUT
DELISTED
Sunnova Energy
NOVA
| $5.17M | ﹤0.01% |
282,500
+5,000
| +2% | +$84.7K |
|
1288
PUT
Ambarella
AMBA
$2.93B
| $5.17M | ﹤0.01% |
61,800
-17,000
| -22% | -$1.24M |
|
1289
XPO
XPO
$25.2B
| $5.14M | ﹤0.01% |
+87,181
| New | +$3.95M |
|
1290
PUT
Bunge Global
BG
$23.7B
| $5.14M | ﹤0.01% |
54,500
-3,100
| -5% | -$288K |
|
1291
Coherent
COHR
$55.2B
| $5.14M | ﹤0.01% |
100,755
+60,124
| +148% | +$2.23M |
|
1292
PUT
American Century Diversified Corporate Bond ETF
KORP
$860M
| $5.13M | ﹤0.01% |
66,100
-1,800
| -3% | -$82.8K |
|
1293
CALL
PureCycle Technologies
PCT
$1.18B
| $5.13M | ﹤0.01% |
479,500
+367,100
| +327% | +$2.66M |
|
1294
PUT
Markel Group
MKL
$24.9B
| $5.12M | ﹤0.01% |
3,700
+600
| +19% | +$805K |
|
1295
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $5.11M | ﹤0.01% |
50,700
-6,100
| -11% | -$613K |
|
1296
Vanguard Growth ETF
VUG
$216B
| $5.11M | ﹤0.01% |
108,300
+30,744
| +40% | +$1.33M |
|
1297
CALL
Shift4
FOUR
$3.83B
| $5.11M | ﹤0.01% |
75,200
-118,200
| -61% | -$7.75M |
|
1298
SPDR Gold Trust
GLD
$131B
| $5.1M | ﹤0.01% |
+28,632
| New | +$5.26M |
|
1299
PUT
UiPath
PATH
$5.68B
| $5.1M | ﹤0.01% |
308,000
+68,800
| +29% | +$1.1M |
|
|
JPGE
1300
CALL
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $5.1M | ﹤0.01% |
92,300
+12,700
| +16% | +$702K |
|
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.