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 |
CELG
Celgene Corp
CELG
|
+$31.6M |
| 2 |
Citigroup
C
|
+$19.5M |
| 3 |
AGN
Allergan plc
AGN
|
+$18.4M |
| 4 |
Baidu
BIDU
|
+$18M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$81.3M |
| 2 |
NVIDIA
NVDA
|
+$60.2M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$48.2M |
| 4 |
Apple
AAPL
|
+$48.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$31.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 11.27% |
| 2 | Technology | 10.64% |
| 3 | Healthcare | 7.06% |
| 4 | Communication Services | 6.92% |
| 5 | Industrials | 5.66% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
51
AutoZone
AZO
$49B
| $8.4M | 0.36% |
11,816
+8,142
| +222% | +$5.2M |
|
52
PUT
Alibaba
BABA
$278B
| $8.28M | 0.36% |
10,891
+40
| +0.4% | +$7.17K |
|
53
Lockheed Martin
LMT
$119B
| $8.03M | 0.35% |
25,019
+22,474
| +883% | +$7.09M |
|
54
PUT
iShares S&P 100 ETF
OEF
$20.2B
| $7.95M | 0.34% |
81,849
-8,224
| -9% | -$949K |
|
|
55
Meta Platforms (Facebook)
META
$1.6T
| $7.94M | 0.34% |
45,011
-176,580
| -80% | -$31.2M |
|
56
CALL
Home Depot
HD
$330B
| $7.93M | 0.34% |
3,318
-464
| -12% | -$80.1K |
|
|
AGN
57
PUT
DELISTED
Allergan plc
AGN
| $7.4M | 0.32% |
3,687
+404
| +12% | +$72.5K |
|
58
Chevron
CVX
$384B
| $7.4M | 0.32% |
59,099
+35,857
| +154% | +$4.25M |
|
|
UCD
59
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $7.32M | 0.31% |
22,370
+2,585
| +13% | +$845K |
|
60
CALL
Walmart Inc
WMT
$867B
| $7.15M | 0.31% |
27,870
+9,408
| +51% | +$288K |
|
61
CALL
Boeing
BA
$163B
| $7.08M | 0.3% |
2,934
-517
| -15% | -$140K |
|
62
Trip.com Group
TCOM
$27B
| $7.02M | 0.3% |
159,209
+156,830
| +6,592% | +$7.5M |
|
63
CALL
Netflix
NFLX
$292B
| $7.01M | 0.3% |
64,860
+11,170
| +21% | +$215K |
|
64
Wynn Resorts
WYNN
$9.85B
| $6.97M | 0.3% |
41,348
+31
| +0.1% | +$4.78K |
|
65
Shopify
SHOP
$154B
| $6.95M | 0.3% |
+688,260
| New | +$7.05M |
|
66
PUT
Booking.com
BKNG
$139B
| $6.77M | 0.29% |
55,950
+28,025
| +100% | +$2.03M |
|
67
ProShares UltraPro QQQ
TQQQ
$34.7B
| $6.69M | 0.29% |
1,156,992
+256,968
| +29% | +$1.41M |
|
68
Colgate-Palmolive
CL
$73.4B
| $6.63M | 0.29% |
87,816
+7,688
| +10% | +$561K |
|
69
PUT
GE Aerospace
GE
$357B
| $6.43M | 0.28% |
2,265
+983
| +77% | +$93.9K |
|
70
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46.2B
| $6.34M | 0.27% |
7,549
+2,195
| +41% | +$520K |
|
|
ANDV
71
DELISTED
Andeavor
ANDV
| $6.16M | 0.27% |
+53,876
| New | +$5.79M |
|
|
72
CALL
NVIDIA
NVDA
$5.15T
| $6.15M | 0.26% |
309,120
+34,600
| +13% | +$172K |
|
73
ProShares UltraPro S&P 500
UPRO
$5.33B
| $5.97M | 0.26% |
255,648
+26,268
| +11% | +$564K |
|
|
74
GE Aerospace
GE
$357B
| $5.93M | 0.26% |
70,874
+31,040
| +78% | +$2.96M |
|
|
75
CALL
Booking.com
BKNG
$139B
| $5.86M | 0.25% |
33,850
+19,200
| +131% | +$1.39M |
|
Similar funds
Simplex Trading's Q4 2017 Portfolio in Review
As of Q4 2017, Simplex Trading held 7,407 positions worth $2.32B, down 5.1% from $2.45B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading withdrew a net $315M in Q4 2017, closing 1,460 positions and reducing 2,239 holdings. Its most notable exit was iShares 20+ Year Treasury Bond ETF, an estimated $21.1M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 11% of assets, down from 14% a quarter earlier, followed by Technology and Healthcare.
Against the trend, Simplex Trading opened a new position in Celgene Corp worth $29.2M.
- Simplex Trading's largest Q4 2017 buy was Celgene Corp: 280,194 shares worth $29.2M.
- Simplex Trading added most to Baidu in Q4 2017, an estimated $18M increase.
- Simplex Trading's biggest Q4 2017 reduction was Amazon, cutting an estimated $81.3M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q4 2017, selling an estimated $21.1M.
- Simplex Trading's ten largest holdings make up 17% of its $2.32B portfolio in Q4 2017.
- Simplex Trading opened 1,548 new positions and closed 1,460 in Q4 2017.
- Simplex Trading's portfolio value fell 5.1% quarter-over-quarter to $2.32B.
Based on Simplex Trading's 13F filing for Q4 2017, filed 10 Jan 2018.