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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
51
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $96.6M | 0.21% |
25,344
+1,844
| +8% | +$141K |
|
52
PUT
Broadcom
AVGO
$1.84T
| $94.6M | 0.21% |
29,950
+2,310
| +8% | +$70.1K |
|
53
CALL
iShares MSCI Australia ETF
EWA
$1.34B
| $94.4M | 0.21% |
20,360
-1,802
| -8% | -$40.6K |
|
54
PUT
Micron Technology
MU
$1.1T
| $93.1M | 0.2% |
17,304
+5,544
| +47% | +$265K |
|
55
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $90.9M | 0.2% |
19,796
+7,566
| +62% | +$430K |
|
56
PUT
Roku
ROKU
$21.4B
| $89.7M | 0.2% |
6,699
+1,594
| +31% | +$219K |
|
57
CALL
Advanced Micro Devices
AMD
$888B
| $88.9M | 0.19% |
19,382
+3,694
| +24% | +$136K |
|
58
PUT
Vanguard S&P 500 ETF
VOO
$981B
| $87.4M | 0.19% |
3,846
+2,392
| +165% | +$677K |
|
59
CALL
Shopify
SHOP
$160B
| $86.3M | 0.19% |
21,700
+5,440
| +33% | +$184K |
|
|
60
Apple
AAPL
$4.81T
| $80M | 0.18% |
+1,090,316
| New | +$70.1M |
|
61
CALL
Ulta Beauty
ULTA
$21B
| $80M | 0.18% |
3,162
+1,916
| +154% | +$468K |
|
62
CALL
Home Depot
HD
$331B
| $79.6M | 0.17% |
3,646
-408
| -10% | -$92.4K |
|
63
CALL
Visa
V
$677B
| $79.1M | 0.17% |
4,211
-1,851
| -31% | -$333K |
|
64
CALL
UnitedHealth
UNH
$396B
| $77.1M | 0.17% |
2,621
-1,022
| -28% | -$267K |
|
65
PUT
FedEx
FDX
$73.1B
| $76.9M | 0.17% |
5,083
-204
| -4% | -$31.4K |
|
|
66
PUT
Advanced Micro Devices
AMD
$888B
| $74.8M | 0.16% |
16,303
+4,845
| +42% | +$178K |
|
67
PUT
Salesforce
CRM
$139B
| $74.7M | 0.16% |
4,594
+549
| +14% | +$86.1K |
|
68
PUT
Lam Research
LRCX
$403B
| $74.6M | 0.16% |
25,520
+80
| +0.3% | +$2.12K |
|
|
69
CALL
Broadcom
AVGO
$1.84T
| $74.5M | 0.16% |
23,590
+9,090
| +63% | +$276K |
|
70
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $72.8M | 0.16% |
3,212
+506
| +19% | +$110K |
|
71
PUT
AbbVie
ABBV
$452B
| $72.3M | 0.16% |
8,169
+3,777
| +86% | +$314K |
|
72
CALL
PayPal
PYPL
$49.3B
| $72.2M | 0.16% |
6,671
+126
| +2% | +$13.1K |
|
|
73
PUT
PayPal
PYPL
$49.3B
| $71.1M | 0.16% |
6,571
-1,976
| -23% | -$206K |
|
74
PUT
JPMorgan Chase
JPM
$918B
| $70M | 0.15% |
5,030
+1,398
| +38% | +$179K |
|
75
PUT
Procter & Gamble
PG
$345B
| $69.7M | 0.15% |
5,577
-1,137
| -17% | -$139K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.