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 | |
|---|---|---|---|---|---|---|
4851
CALL
Healthpeak Properties
DOC
$15.5B
| $120K | ﹤0.01% |
6,000
-4,000
| -40% | -$83K |
|
4852
CALL
Domo
DOMO
$171M
| $120K | ﹤0.01% |
8,200
+7,100
| +645% | +$105K |
|
4853
CALL
Fennec Pharmaceuticals
FENC
$335M
| $120K | ﹤0.01% |
13,700
-5,900
| -30% | -$49.1K |
|
4854
PUT
Griffon
GFF
$4.02B
| $120K | ﹤0.01% |
3,000
-2,900
| -49% | -$95.1K |
|
4855
Halozyme
HALO
$9.88B
| $120K | ﹤0.01% |
+3,339
| New | +$114K |
|
4856
PUT
News Corp Class B
NWS
$17.7B
| $120K | ﹤0.01% |
6,200
+2,500
| +68% | +$45.7K |
|
4857
CALL
Parsons
PSN
$4.31B
| $120K | ﹤0.01% |
2,500
+1,400
| +127% | +$63.9K |
|
|
SA
4858
CALL
Seabridge Gold
SA
$2.72B
| $120K | ﹤0.01% |
10,000
-600
| -6% | -$8.16K |
|
|
SAGE
4859
DELISTED
Sage Therapeutics
SAGE
| $120K | ﹤0.01% |
+2,562
| New | +$127K |
|
4860
CALL
Viavi Solutions
VIAV
$7.95B
| $120K | ﹤0.01% |
10,600
+10,400
| +5,200% | +$102K |
|
4861
VSE Corp
VSEC
$5.19B
| $120K | ﹤0.01% |
+2,196
| New | +$106K |
|
|
ITCI
4862
PUT
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $120K | ﹤0.01% |
1,900
-46,100
| -96% | -$2.87M |
|
4863
PUT
Banco Bilbao Vizcaya Argentaria
BBVA
$142B
| $119K | ﹤0.01% |
15,600
+15,100
| +3,020% | +$108K |
|
4864
Dover
DOV
$26.7B
| $119K | ﹤0.01% |
+811
| New | +$116K |
|
4865
PUT
Playboy Inc
PLBY
$136M
| $119K | ﹤0.01% |
71,400
-57,400
| -45% | -$96.9K |
|
4866
Adient
ADNT
$1.69B
| $118K | ﹤0.01% |
3,087
+2,750
| +816% | +$102K |
|
|
BGFV
4867
PUT
DELISTED
Big 5 Sporting Goods
BGFV
| $118K | ﹤0.01% |
12,900
-15,600
| -55% | -$124K |
|
4868
Energy Vault
NRGV
$455M
| $118K | ﹤0.01% |
43,327
-6,054
| -12% | -$12.8K |
|
4869
PUT
PROG Holdings
PRG
$1.71B
| $118K | ﹤0.01% |
3,700
-100
| -3% | -$3.02K |
|
|
CMLS
4870
DELISTED
Cumulus Media Inc. Class A Common Stock
CMLS
| $118K | ﹤0.01% |
+28,972
| New | +$97.4K |
|
|
HEP
4871
PUT
DELISTED
Holly Energy Partners, L.P.
HEP
| $118K | ﹤0.01% |
6,400
+2,500
| +64% | +$43.3K |
|
|
UNVR
4872
CALL
DELISTED
Univar Solutions Inc.
UNVR
| $118K | ﹤0.01% |
3,300
-85,400
| -96% | -$3.03M |
|
4873
PUT
Alpha Pro Tech
APT
$49.9M
| $117K | ﹤0.01% |
29,400
+700
| +2% | +$2.75K |
|
4874
PUT
Clearway Energy Class C
CWEN
$4.79B
| $117K | ﹤0.01% |
4,200
-3,700
| -47% | -$112K |
|
4875
PUT
DXC Technology
DXC
$1.91B
| $117K | ﹤0.01% |
4,400
+800
| +22% | +$19.9K |
|
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.