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 | |
|---|---|---|---|---|---|---|
|
BNY
1176
PUT
Bank of New York Mellon
BNY
$109B
| $6.19M | 0.01% |
139,100
-134,500
| -49% | -$5.77M |
|
1177
CALL
Southern Copper
SCCO
$143B
| $6.16M | 0.01% |
92,661
+17,690
| +24% | +$1.21M |
|
1178
Trade Desk
TTD
$7.89B
| $6.16M | 0.01% |
79,804
+15,778
| +25% | +$1.07M |
|
1179
PUT
Knight Transportation
KNX
$11.8B
| $6.16M | 0.01% |
110,900
-68,500
| -38% | -$3.82M |
|
1180
PUT
Edwards Lifesciences
EW
$48.3B
| $6.16M | 0.01% |
65,300
-25,000
| -28% | -$2.17M |
|
1181
PUT
Kraft Heinz
KHC
$30.1B
| $6.15M | 0.01% |
173,300
-243,400
| -58% | -$9.36M |
|
1182
CALL
NovoCure
NVCR
$2.32B
| $6.15M | 0.01% |
148,100
+31,300
| +27% | +$1.94M |
|
|
EBIX
1183
CALL
DELISTED
Ebix Inc
EBIX
| $6.14M | 0.01% |
243,700
+193,300
| +384% | +$3.63M |
|
1184
PUT
Dynatrace
DT
$11.8B
| $6.12M | 0.01% |
119,000
+96,800
| +436% | +$4.54M |
|
|
SHNY
1185
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $6.11M | 0.01% |
364,000
-913,800
| -72% | -$15.3M |
|
1186
CALL
Stanley Black & Decker
SWK
$13.6B
| $6.09M | 0.01% |
65,000
-23,700
| -27% | -$1.96M |
|
1187
CALL
Macy's
M
$6.14B
| $6.09M | 0.01% |
379,500
-295,300
| -44% | -$4.72M |
|
1188
PUT
Vulcan Materials
VMC
$35.7B
| $6.09M | 0.01% |
27,000
+20,800
| +335% | +$3.99M |
|
1189
PUT
Coupang
CPNG
$28.1B
| $6.08M | 0.01% |
349,300
+208,700
| +148% | +$3.4M |
|
1190
PUT
McKesson
MCK
$96.5B
| $6.07M | 0.01% |
14,200
-32,700
| -70% | -$12.6M |
|
1191
CALL
Moody's
MCO
$82.5B
| $6.05M | 0.01% |
17,400
-65,400
| -79% | -$20.7M |
|
1192
PUT
Paycom
PAYC
$6.47B
| $6.04M | 0.01% |
18,800
+4,300
| +30% | +$1.27M |
|
1193
CALL
Lumentum
LITE
$64.9B
| $6.01M | ﹤0.01% |
106,000
+98,200
| +1,259% | +$4.91M |
|
1194
PUT
BioMarin Pharmaceuticals
BMRN
$11.4B
| $6M | ﹤0.01% |
69,200
+20,000
| +41% | +$1.88M |
|
1195
PUT
Fox Class B
FOX
$20.7B
| $5.99M | ﹤0.01% |
178,800
+146,700
| +457% | +$4.44M |
|
1196
CALL
State Street
STT
$50.6B
| $5.99M | ﹤0.01% |
81,800
+32,600
| +66% | +$2.34M |
|
1197
PUT
Aptiv
APTV
$11.9B
| $5.98M | ﹤0.01% |
58,600
+14,100
| +32% | +$1.39M |
|
1198
PUT
Madrigal Pharmaceuticals
MDGL
$12.5B
| $5.98M | ﹤0.01% |
25,900
+5,500
| +27% | +$1.49M |
|
1199
PUT
Energy Transfer Partners
ET
$70.3B
| $5.98M | ﹤0.01% |
470,700
-160,100
| -25% | -$2.03M |
|
1200
PUT
UBS Group
UBS
$169B
| $5.97M | ﹤0.01% |
294,700
-195,300
| -40% | -$3.93M |
|
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.