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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
51
PUT
Shopify
SHOP
$160B
| $85.2M | 0.23% |
28,370
+10,110
| +55% | +$263K |
|
52
CALL
Broadcom
AVGO
$1.84T
| $84.1M | 0.23% |
29,220
+6,260
| +27% | +$182K |
|
|
53
PUT
Johnson & Johnson
JNJ
$599B
| $79.4M | 0.22% |
5,698
-1,218
| -18% | -$169K |
|
|
XLNX
54
PUT
DELISTED
Xilinx Inc
XLNX
| $78M | 0.21% |
6,611
-449
| -6% | -$52.3K |
|
55
PUT
Mastercard
MA
$476B
| $76.4M | 0.21% |
2,887
+1,036
| +56% | +$259K |
|
56
CALL
Visa
V
$677B
| $71.1M | 0.19% |
4,095
-1,695
| -29% | -$278K |
|
57
CALL
Adobe
ADBE
$90.3B
| $70.5M | 0.19% |
2,392
-1,874
| -44% | -$520K |
|
58
PUT
JPMorgan Chase
JPM
$918B
| $68.7M | 0.19% |
6,149
+431
| +8% | +$47.5K |
|
59
PUT
Home Depot
HD
$332B
| $68.7M | 0.19% |
3,301
+475
| +17% | +$94.7K |
|
|
AGN
60
PUT
DELISTED
Allergan plc
AGN
| $68.2M | 0.19% |
4,076
+2,872
| +239% | +$398K |
|
61
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $66.6M | 0.18% |
16,214
+5,798
| +56% | +$308K |
|
|
62
Alphabet (Google) Class C
GOOG
$4.22T
| $65.4M | 0.18% |
1,210,340
+225,640
| +23% | +$13M |
|
63
PUT
Baidu
BIDU
$36.8B
| $62.9M | 0.17% |
5,359
+928
| +21% | +$132K |
|
64
CALL
Salesforce
CRM
$139B
| $61.2M | 0.17% |
4,033
-996
| -20% | -$156K |
|
65
PUT
Procter & Gamble
PG
$345B
| $60.5M | 0.17% |
5,520
-2,812
| -34% | -$300K |
|
66
PUT
Micron Technology
MU
$1.1T
| $60M | 0.16% |
15,552
-7,975
| -34% | -$304K |
|
|
67
PUT
Visa
V
$677B
| $59.3M | 0.16% |
3,415
+962
| +39% | +$158K |
|
68
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $58.4M | 0.16% |
2,739
+962
| +54% | +$199K |
|
69
PUT
Costco
COST
$412B
| $57.5M | 0.16% |
2,177
+233
| +12% | +$58.1K |
|
70
PUT
Intuitive Surgical
ISRG
$124B
| $56.5M | 0.15% |
3,234
+228
| +8% | +$39.1K |
|
71
PUT
PayPal
PYPL
$49.3B
| $55.8M | 0.15% |
4,873
+481
| +11% | +$53.3K |
|
72
PUT
Biogen
BIIB
$29.5B
| $54M | 0.15% |
2,307
+408
| +21% | +$94.2K |
|
|
73
CALL
JPMorgan Chase
JPM
$918B
| $53.7M | 0.15% |
5,531
-378
| -6% | -$41.7K |
|
|
74
Netflix
NFLX
$286B
| $53.3M | 0.15% |
1,450,270
+473,340
| +48% | +$17.1M |
|
75
PUT
3M
MMM
$89.1B
| $52.9M | 0.14% |
3,649
+2,018
| +124% | +$311K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.