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 | |
|---|---|---|---|---|---|---|
3851
Papa John's
PZZA
$1.02B
| $299K | ﹤0.01% |
4,054
-28,840
| -88% | -$2.14M |
|
3852
PUT
Celldex Therapeutics
CLDX
$2.79B
| $298K | ﹤0.01% |
8,800
+3,500
| +66% | +$118K |
|
3853
CALL
Genco Shipping & Trading
GNK
$1.11B
| $298K | ﹤0.01% |
21,300
-61,600
| -74% | -$886K |
|
3854
CALL
Park-Ohio Holdings
PKOH
$564M
| $298K | ﹤0.01% |
+15,700
| New | +$239K |
|
3855
CALL
Extra Space Storage
EXR
$32.2B
| $297K | ﹤0.01% |
2,000
+1,400
| +233% | +$211K |
|
3856
PUT
New Fortress Energy
NFE
$94.3M
| $297K | ﹤0.01% |
11,100
-2,500
| -18% | -$72.5K |
|
|
NGD
3857
CALL
DELISTED
New Gold Inc
NGD
| $297K | ﹤0.01% |
275,200
-3,700
| -1% | -$4.58K |
|
3858
CALL
Remitly
RELY
$4.91B
| $297K | ﹤0.01% |
15,800
-15,000
| -49% | -$273K |
|
3859
ProShares UltraShort Yen
YCS
$31.7M
| $297K | ﹤0.01% |
8,752
-32,686
| -79% | -$996K |
|
|
HEP
3860
CALL
DELISTED
Holly Energy Partners, L.P.
HEP
| $297K | ﹤0.01% |
16,100
+8,400
| +109% | +$145K |
|
3861
Burford Capital
BUR
$955M
| $296K | ﹤0.01% |
24,353
-82,098
| -77% | -$1.06M |
|
3862
CALL
Extreme Networks
EXTR
$3.92B
| $296K | ﹤0.01% |
11,400
-100
| -0.9% | -$1.97K |
|
3863
PUT
HealthEquity
HQY
$8.46B
| $296K | ﹤0.01% |
4,700
-4,200
| -47% | -$244K |
|
3864
iShares Core S&P Mid-Cap ETF
IJH
$123B
| $296K | ﹤0.01% |
5,665
-16,880
| -75% | -$839K |
|
3865
PUT
Sturm, Ruger & Co
RGR
$611M
| $296K | ﹤0.01% |
5,600
+1,300
| +30% | +$70.9K |
|
3866
Vanguard Long-Term Treasury ETF
VGLT
$10.2B
| $296K | ﹤0.01% |
+4,667
| New | +$299K |
|
3867
CALL
Apyx Medical
APYX
$163M
| $295K | ﹤0.01% |
+58,800
| New | +$298K |
|
|
BZUN
3868
CALL
Baozun
BZUN
$168M
| $295K | ﹤0.01% |
74,100
-46,600
| -39% | -$209K |
|
3869
CALL
Element Solutions
ESI
$8.89B
| $295K | ﹤0.01% |
15,400
+4,900
| +47% | +$90.1K |
|
3870
SK Telecom
SKM
$11.8B
| $295K | ﹤0.01% |
15,127
+7,456
| +97% | +$153K |
|
3871
CALL
Calix
CALX
$2.34B
| $294K | ﹤0.01% |
5,900
-2,100
| -26% | -$101K |
|
3872
CALL
Equity Lifestyle Properties
ELS
$12.8B
| $294K | ﹤0.01% |
4,400
+3,500
| +389% | +$233K |
|
|
OPTU
3873
CALL
Optimum Communications Inc
OPTU
$298M
| $293K | ﹤0.01% |
97,300
+21,700
| +29% | +$61.6K |
|
3874
PUT
The Greenbrier Companies
GBX
$1.6B
| $293K | ﹤0.01% |
6,800
-2,800
| -29% | -$82.7K |
|
3875
PUT
Gerdau
GGB
$9.72B
| $293K | ﹤0.01% |
67,560
-140,640
| -68% | -$588K |
|
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.