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 | |
|---|---|---|---|---|---|---|
7226
PUT
Glacier Bancorp
GBCI
$6.45B
| $12K | ﹤0.01% |
+400
| New | +$13.2K |
|
7227
CALL
Hain Celestial
HAIN
$44.8M
| $12K | ﹤0.01% |
1,000
-600
| -38% | -$8.83K |
|
7228
CALL
HUTCHMED
HCM
$1.93B
| $12K | ﹤0.01% |
1,000
-2,300
| -70% | -$31.4K |
|
|
7229
PUT
HUTCHMED
HCM
$1.93B
| $12K | ﹤0.01% |
1,000
-600
| -38% | -$8.19K |
|
7230
PUT
Information Services Group
III
$199M
| $12K | ﹤0.01% |
+2,300
| New | +$11.9K |
|
7231
International Money Express
IMXI
$398M
| $12K | ﹤0.01% |
497
-251
| -34% | -$6.16K |
|
7232
PUT
Intapp
INTA
$2.36B
| $12K | ﹤0.01% |
300
-500
| -63% | -$21.6K |
|
7233
CALL
Kforce
KFRC
$1.04B
| $12K | ﹤0.01% |
+200
| New | +$12K |
|
7234
CALL
LifeMD
LFMD
$186M
| $12K | ﹤0.01% |
2,800
+200
| +8% | +$444 |
|
7235
Lemonade
LMND
$4.77B
| $12K | ﹤0.01% |
753
+153
| +26% | +$2.39K |
|
7236
ManpowerGroup
MAN
$2.58B
| $12K | ﹤0.01% |
+163
| New | +$12.3K |
|
7237
CALL
Pediatrix Medical
MD
$2.21B
| $12K | ﹤0.01% |
+900
| New | +$12.6K |
|
7238
PUT
Ramaco Resources Class A
METC
$637M
| $12K | ﹤0.01% |
10,749
+4,031
| +60% | +$33.6K |
|
|
NCTY
7239
CALL
The9 Ltd
NCTY
$70.6M
| $12K | ﹤0.01% |
1,710
| – | – |
|
7240
PUT
New Mountain Finance
NMFC
$668M
| $12K | ﹤0.01% |
1,000
-2,000
| -67% | -$24.1K |
|
|
ONTF
7241
CALL
DELISTED
ON24
ONTF
| $12K | ﹤0.01% |
1,600
-6,600
| -80% | -$54.8K |
|
7242
PUT
OptimizeRx
OPRX
$119M
| $12K | ﹤0.01% |
900
+300
| +50% | +$4.27K |
|
7243
PUT
Pampa Energía
PAM
$4.56B
| $12K | ﹤0.01% |
300
+200
| +200% | +$7.42K |
|
|
PDM
7244
PUT
Piedmont Realty Trust
PDM
$1.2B
| $12K | ﹤0.01% |
1,700
-4,400
| -72% | -$29.3K |
|
7245
CALL
Piper Sandler
PIPR
$5.24B
| $12K | ﹤0.01% |
400
-9,200
| -96% | -$304K |
|
|
PPBT
7246
Purple Biotech
PPBT
$1.28M
| $12K | ﹤0.01% |
46
-53
| -54% | -$19K |
|
7247
Invesco Energy Exploration & Production ETF
PXE
$84.6M
| $12K | ﹤0.01% |
452
-1,432
| -76% | -$37.9K |
|
7248
PUT
Qualys
QLYS
$4.78B
| $12K | ﹤0.01% |
+100
| New | +$12.3K |
|
7249
PUT
Radian Group
RDN
$5.22B
| $12K | ﹤0.01% |
500
-8,900
| -95% | -$219K |
|
7250
CALL
Dr. Reddy's Laboratories
RDY
$9.77B
| $12K | ﹤0.01% |
+1,000
| New | +$11.7K |
|
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.