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 | |
|---|---|---|---|---|---|---|
26
PUT
iShares S&P 100 ETF
OEF
$20.1B
| $13M | 0.56% |
80,052
-6,963
| -8% | -$740K |
|
|
27
CALL
iShares S&P 100 ETF
OEF
$20.1B
| $12.6M | 0.55% |
48,389
-4,871
| -9% | -$518K |
|
28
Visa
V
$672B
| $12.1M | 0.53% |
129,014
+37,859
| +42% | +$3.51M |
|
29
PUT
Invesco QQQ Trust
QQQ
$469B
| $11.8M | 0.51% |
44,034
+24,300
| +123% | +$3.34M |
|
|
30
CALL
Amazon
AMZN
$2.63T
| $11.7M | 0.51% |
81,400
-7,640
| -9% | -$364K |
|
|
X
31
DELISTED
US Steel
X
| $11.5M | 0.5% |
518,988
+427,396
| +467% | +$10.1M |
|
32
Mastercard
MA
$470B
| $11.3M | 0.49% |
93,310
+74,133
| +387% | +$8.79M |
|
|
33
CALL
Alphabet (Google) Class A
GOOGL
$4.17T
| $10.9M | 0.47% |
67,640
-12,620
| -16% | -$590K |
|
34
SPDR Gold Trust
GLD
$133B
| $10.7M | 0.47% |
91,017
+65,218
| +253% | +$7.81M |
|
35
Walt Disney
DIS
$166B
| $10.2M | 0.44% |
96,122
+26,602
| +38% | +$2.91M |
|
|
CELG
36
DELISTED
Celgene Corp
CELG
| $9.98M | 0.43% |
76,819
+4,126
| +6% | +$506K |
|
37
CALL
NVIDIA
NVDA
$5.14T
| $9.87M | 0.43% |
268,880
+58,960
| +28% | +$187K |
|
38
PUT
Apple
AAPL
$4.79T
| $9.75M | 0.42% |
62,392
-1,624
| -3% | -$60K |
|
|
39
Goldman Sachs
GS
$324B
| $9.41M | 0.41% |
42,431
-125,017
| -75% | -$27.8M |
|
40
T-Mobile US
TMUS
$207B
| $9.25M | 0.4% |
152,605
+80,069
| +110% | +$5.22M |
|
|
41
PUT
Amazon
AMZN
$2.63T
| $9.13M | 0.4% |
149,260
+50,980
| +52% | +$2.43M |
|
42
Intel
INTC
$516B
| $8.74M | 0.38% |
258,986
+54,209
| +26% | +$1.94M |
|
43
iShares 20+ Year Treasury Bond ETF
TLT
$42.2B
| $8.73M | 0.38% |
69,753
-109,758
| -61% | -$13.6M |
|
44
General Mills
GIS
$19.7B
| $8.18M | 0.36% |
+147,659
| New | +$8.43M |
|
45
Direxion Daily Small Cap Bull 3x ETF
TNA
$1.38B
| $8.08M | 0.35% |
144,885
-78,501
| -35% | -$4.19M |
|
46
CALL
Citigroup
C
$222B
| $8M | 0.35% |
9,671
-3,329
| -26% | -$204K |
|
|
47
CALL
Apple
AAPL
$4.79T
| $7.8M | 0.34% |
52,160
-25,588
| -33% | -$946K |
|
48
Lockheed Martin
LMT
$119B
| $7.62M | 0.33% |
+27,444
| New | +$7.54M |
|
|
49
CALL
Invesco QQQ Trust
QQQ
$469B
| $7.62M | 0.33% |
24,687
+14,662
| +146% | +$2.02M |
|
50
General Motors
GM
$74.1B
| $7.59M | 0.33% |
217,357
+80,165
| +58% | +$2.72M |
|
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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.