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 | |
|---|---|---|---|---|---|---|
2251
Philips
PHG
$25.4B
| $1.42M | ﹤0.01% |
73,305
+31,491
| +75% | +$551K |
|
2252
PUT
RPM International
RPM
$13.7B
| $1.42M | ﹤0.01% |
15,800
+2,900
| +22% | +$238K |
|
2253
Republic Services
RSG
$66.7B
| $1.42M | ﹤0.01% |
9,251
+2,783
| +43% | +$398K |
|
|
EDR
2254
PUT
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $1.42M | ﹤0.01% |
59,200
+21,900
| +59% | +$516K |
|
2255
Designer Brands
DBI
$277M
| $1.41M | ﹤0.01% |
140,038
+131,567
| +1,553% | +$1.09M |
|
2256
CALL
CONMED
CNMD
$1.29B
| $1.41M | ﹤0.01% |
10,400
+8,200
| +373% | +$1M |
|
2257
PUT
Willis Towers Watson
WTW
$27.9B
| $1.41M | ﹤0.01% |
6,000
+4,900
| +445% | +$1.13M |
|
2258
Asana
ASAN
$1.58B
| $1.41M | ﹤0.01% |
64,088
+18,322
| +40% | +$367K |
|
2259
PUT
Equifax
EFX
$20.3B
| $1.41M | ﹤0.01% |
6,000
-69,500
| -92% | -$14.6M |
|
2260
CALL
Shoals Technologies Group
SHLS
$1.58B
| $1.41M | ﹤0.01% |
55,200
+17,200
| +45% | +$398K |
|
2261
CALL
BellRing Brands
BRBR
$1.51B
| $1.41M | ﹤0.01% |
38,500
+9,100
| +31% | +$326K |
|
2262
CALL
iRhythm Holdings
IRTC
$3.59B
| $1.41M | ﹤0.01% |
13,500
+300
| +2% | +$36K |
|
2263
iShares Mortgage Real Estate ETF
REM
$542M
| $1.41M | ﹤0.01% |
59,673
-130,870
| -69% | -$2.86M |
|
2264
CALL
Star Bulk Carriers
SBLK
$3.14B
| $1.41M | ﹤0.01% |
79,600
-51,900
| -39% | -$999K |
|
|
AZUL
2265
CALL
DELISTED
Azul
AZUL
| $1.4M | ﹤0.01% |
102,400
-256,700
| -71% | -$2.33M |
|
2266
PUT
Cincinnati Financial
CINF
$28.3B
| $1.4M | ﹤0.01% |
14,400
+7,900
| +122% | +$816K |
|
2267
PUT
Aclaris Therapeutics
ACRS
$730M
| $1.4M | ﹤0.01% |
134,900
-225,400
| -63% | -$2.04M |
|
2268
PUT
OneMain Financial
OMF
$6.9B
| $1.4M | ﹤0.01% |
32,000
-24,200
| -43% | -$944K |
|
|
DEN
2269
CALL
DELISTED
Denbury Inc.
DEN
| $1.4M | ﹤0.01% |
16,200
+100
| +0.6% | +$9.06K |
|
|
CTLP
2270
DELISTED
Cantaloupe
CTLP
| $1.4M | ﹤0.01% |
175,451
+90,206
| +106% | +$584K |
|
2271
PUT
Lightspeed Commerce
LSPD
$1.3B
| $1.39M | ﹤0.01% |
82,300
+45,300
| +122% | +$651K |
|
2272
CALL
Mohawk Industries
MHK
$6.9B
| $1.39M | ﹤0.01% |
13,500
-2,100
| -13% | -$206K |
|
2273
CALL
PennyMac Financial
PFSI
$4.38B
| $1.39M | ﹤0.01% |
19,800
-75,500
| -79% | -$4.78M |
|
2274
PUT
Rithm Capital
RITM
$5.09B
| $1.39M | ﹤0.01% |
148,900
+31,000
| +26% | +$259K |
|
2275
Garrett Motion
GTX
$5.9B
| $1.39M | ﹤0.01% |
+183,758
| New | +$1.47M |
|
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.