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 |
Amazon
AMZN
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
51
Citigroup
C
$223B
| $7.48M | 0.33% |
111,875
+37,040
| +49% | +$2.27M |
|
52
AbbVie
ABBV
$452B
| $7.22M | 0.31% |
99,626
-150,208
| -60% | -$10.1M |
|
53
Costco
COST
$412B
| $7.2M | 0.31% |
44,997
+16,469
| +58% | +$2.84M |
|
54
PUT
Tesla
TSLA
$1.42T
| $7.05M | 0.31% |
141,375
+25,860
| +22% | +$569K |
|
|
55
CALL
Booking.com
BKNG
$139B
| $6.91M | 0.3% |
19,950
+3,850
| +24% | +$282K |
|
56
Advanced Micro Devices
AMD
$888B
| $6.45M | 0.28% |
+516,737
| New | +$6.32M |
|
57
PUT
NVIDIA
NVDA
$5.02T
| $6.4M | 0.28% |
406,760
-44,280
| -10% | -$141K |
|
58
State Street Utilities Select Sector SPDR ETF
XLU
$23.3B
| $6.12M | 0.27% |
+235,418
| New | +$6.18M |
|
|
AGN
59
DELISTED
Allergan plc
AGN
| $5.83M | 0.25% |
23,991
+19,876
| +483% | +$4.67M |
|
|
UCD
60
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $5.81M | 0.25% |
22,569
+5,536
| +33% | +$1.42M |
|
61
AstraZeneca
AZN
$263B
| $5.8M | 0.25% |
85,041
+64,356
| +311% | +$4.2M |
|
|
62
Booking.com
BKNG
$139B
| $5.69M | 0.25% |
76,000
-347,000
| -82% | -$25.4M |
|
63
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $5.67M | 0.25% |
+26,597
| New | +$5.58M |
|
64
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $5.67M | 0.25% |
2,764
+268
| +11% | +$44.6K |
|
65
GE Aerospace
GE
$353B
| $5.61M | 0.24% |
43,335
+24,912
| +135% | +$3.41M |
|
66
PUT
Netflix
NFLX
$286B
| $5.55M | 0.24% |
104,860
+29,650
| +39% | +$456K |
|
67
PUT
Meta Platforms (Facebook)
META
$1.63T
| $5.45M | 0.24% |
12,785
+3,511
| +38% | +$522K |
|
68
Pfizer
PFE
$142B
| $5.33M | 0.23% |
167,179
+102,384
| +158% | +$3.23M |
|
69
ConocoPhillips
COP
$143B
| $5.32M | 0.23% |
120,969
+99,656
| +468% | +$4.65M |
|
70
Starbucks
SBUX
$119B
| $5.2M | 0.23% |
89,259
-181,177
| -67% | -$11M |
|
71
MetLife
MET
$60.1B
| $5.06M | 0.22% |
+103,279
| New | +$4.79M |
|
72
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $5.04M | 0.22% |
62,892
-7,588
| -11% | -$202K |
|
|
CELG
73
CALL
DELISTED
Celgene Corp
CELG
| $4.97M | 0.22% |
4,309
+1,228
| +40% | +$150K |
|
74
Yum! Brands
YUM
$40.6B
| $4.77M | 0.21% |
64,635
+48,012
| +289% | +$3.34M |
|
75
CVS Health
CVS
$141B
| $4.76M | 0.21% |
59,188
-176,130
| -75% | -$13.9M |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.