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 | Miscellaneous | 39.87% |
| 2 | Technology | 13.76% |
| 3 | Communication Services | 11.79% |
| 4 | Consumer Discretionary | 10.02% |
| 5 | Healthcare | 7.62% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1451
Encore Capital Group
ECPG
$2.1B
| $145K | 0.01% |
3,628
-11,735
| -76% | -$421K |
|
1452
PUT
ArcelorMittal
MT
$58.2B
| $145K | 0.01% |
1,998
+1,881
| +1,608% | +$42.1K |
|
1453
TTEC Holdings
TTEC
$66.1M
| $145K | 0.01% |
+3,555
| New | +$129K |
|
1454
CALL
Wayfair
W
$13.7B
| $145K | 0.01% |
111
-39
| -26% | -$2.31K |
|
1455
CALL
APA Corp
APA
$15.3B
| $144K | 0.01% |
1,826
+140
| +8% | +$6.9K |
|
1456
Banco Bradesco
BBD
$37.6B
| $144K | 0.01% |
+29,838
| New | +$151K |
|
|
SPWR
1457
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $144K | 0.01% |
906
+546
| +152% | +$2.68K |
|
|
ANDV
1458
PUT
DELISTED
Andeavor
ANDV
| $144K | 0.01% |
1,619
-9
| -0.6% | -$759 |
|
|
CIT
1459
CALL
DELISTED
CIT Group Inc.
CIT
| $144K | 0.01% |
414
-214
| -34% | -$9.84K |
|
1460
iShares MSCI Australia ETF
EWA
$1.33B
| $143K | 0.01% |
6,596
+93
| +1% | +$2.04K |
|
1461
PUT
Jacobs Solutions
J
$16.9B
| $143K | 0.01% |
184
-155
| -46% | -$6.89K |
|
1462
LG Display
LPL
$3.26B
| $143K | 0.01% |
8,938
+7,610
| +573% | +$108K |
|
1463
PUT
Mattel
MAT
$4.04B
| $143K | 0.01% |
1,115
+549
| +97% | +$12.4K |
|
1464
Republic Services
RSG
$67.9B
| $143K | 0.01% |
+2,255
| New | +$143K |
|
|
BSFT
1465
PUT
DELISTED
BroadSoft, Inc.
BSFT
| $143K | 0.01% |
840
+555
| +195% | +$21.8K |
|
1466
Alkermes
ALKS
$7.63B
| $142K | 0.01% |
2,460
-4,723
| -66% | -$274K |
|
1467
PUT
Fossil Group
FOSL
$302M
| $142K | 0.01% |
1,437
+974
| +210% | +$13.2K |
|
1468
CALL
Parker-Hannifin
PH
$120B
| $142K | 0.01% |
317
+244
| +334% | +$38.7K |
|
1469
Transocean
RIG
$6.43B
| $142K | 0.01% |
17,346
-7,196
| -29% | -$73.5K |
|
1470
Cohu
COHU
$2.52B
| $141K | 0.01% |
+8,959
| New | +$164K |
|
1471
PUT
Fluor
FLR
$7.57B
| $141K | 0.01% |
314
+76
| +32% | +$3.64K |
|
|
KG
1472
Kestrel Group
KG
$54.6M
| $141K | 0.01% |
+637
| New | +$149K |
|
1473
PUT
Navient
NAVI
$888M
| $141K | 0.01% |
604
-135
| -18% | -$2.04K |
|
1474
CALL
BP
BP
$116B
| $140K | 0.01% |
3,047
+833
| +38% | +$25.9K |
|
1475
iShares MSCI India ETF
INDA
$6.66B
| $140K | 0.01% |
4,387
+1,823
| +71% | +$58.7K |
|
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 $118M in Q2 2017, closing 1,474 positions and reducing 2,319 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Miscellaneous at 40% of assets, up from 40% a quarter earlier, followed by Technology and Communication Services.
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.