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 | |
|---|---|---|---|---|---|---|
2226
CALL
Tencent Music
TME
$14.5B
| $1.48M | ﹤0.01% |
200,400
-10,100
| -5% | -$76.3K |
|
2227
CALL
Fidelity National Financial
FNF
$13.9B
| $1.48M | ﹤0.01% |
41,000
+22,500
| +122% | +$785K |
|
2228
CALL
CAVA Group
CAVA
$7.22B
| $1.47M | ﹤0.01% |
+35,900
| New | +$1.48M |
|
2229
iShares 1-3 Year Treasury Bond ETF
SHY
$25.4B
| $1.47M | ﹤0.01% |
18,140
-12,344
| -40% | -$1.01M |
|
|
SWN
2230
CALL
DELISTED
Southwestern Energy Company
SWN
| $1.47M | ﹤0.01% |
244,400
-159,600
| -40% | -$823K |
|
2231
CALL
Perion Network
PERI
$367M
| $1.46M | ﹤0.01% |
47,600
-31,000
| -39% | -$1.06M |
|
2232
PUT
Viridian Therapeutics
VRDN
$2.13B
| $1.46M | ﹤0.01% |
61,300
+59,300
| +2,965% | +$1.52M |
|
2233
CALL
AvalonBay Communities
AVB
$27.1B
| $1.46M | ﹤0.01% |
7,700
+700
| +10% | +$125K |
|
2234
PUT
Nutanix
NTNX
$14.9B
| $1.46M | ﹤0.01% |
51,900
+32,400
| +166% | +$860K |
|
2235
Melco Resorts & Entertainment
MLCO
$2.1B
| $1.45M | ﹤0.01% |
118,901
+2,615
| +2% | +$32.3K |
|
2236
CALL
Urban Outfitters
URBN
$5.99B
| $1.45M | ﹤0.01% |
43,800
+22,100
| +102% | +$645K |
|
|
WWE
2237
DELISTED
World Wrestling Entertainment
WWE
| $1.45M | ﹤0.01% |
+13,386
| New | +$1.38M |
|
2238
PUT
Equitable Holdings
EQH
$13.1B
| $1.45M | ﹤0.01% |
53,400
+45,700
| +594% | +$1.16M |
|
2239
CALL
A.O. Smith
AOS
$8.38B
| $1.45M | ﹤0.01% |
19,900
-39,700
| -67% | -$2.72M |
|
2240
CALL
Biomea Fusion
BMEA
$90.4M
| $1.45M | ﹤0.01% |
66,000
-12,400
| -16% | -$388K |
|
2241
Direxion Daily Technology Bull 3x ETF
TECL
$5.14B
| $1.45M | ﹤0.01% |
26,821
+26,621
| +13,311% | +$1.11M |
|
|
2242
PUT
Tencent Music
TME
$14.5B
| $1.45M | ﹤0.01% |
196,200
-26,500
| -12% | -$200K |
|
2243
CALL
Conagra Brands
CAG
$7.07B
| $1.44M | ﹤0.01% |
42,800
-77,900
| -65% | -$2.81M |
|
2244
Zscaler
ZS
$23B
| $1.44M | ﹤0.01% |
9,856
+4,089
| +71% | +$499K |
|
|
CALY
2245
CALL
Callaway Golf Company
CALY
$3.26B
| $1.44M | ﹤0.01% |
72,500
+17,600
| +32% | +$352K |
|
2246
CALL
Children's Place
PLCE
$53.6M
| $1.44M | ﹤0.01% |
61,900
+52,700
| +573% | +$1.34M |
|
2247
CALL
Bath & Body Works
BBWI
$4.01B
| $1.43M | ﹤0.01% |
38,200
-6,700
| -15% | -$245K |
|
2248
Teck Resources
TECK
$29.5B
| $1.43M | ﹤0.01% |
34,038
-88,812
| -72% | -$3.82M |
|
|
CALY
2249
PUT
Callaway Golf Company
CALY
$3.26B
| $1.43M | ﹤0.01% |
72,100
+63,400
| +729% | +$1.27M |
|
|
BORR
2250
PUT
Borr Drilling
BORR
$1.31B
| $1.43M | ﹤0.01% |
189,400
-45,700
| -19% | -$327K |
|
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.