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 |
LNKD
LinkedIn Corporation
LNKD
|
+$21.4M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.3M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$15M |
| 4 |
Biogen
BIIB
|
+$14.9M |
| 5 |
Visa
V
|
+$14.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$36.7M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$14.7M |
| 5 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$13.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 6.61% |
| 2 | Healthcare | 6.55% |
| 3 | Technology | 6.45% |
| 4 | Consumer Discretionary | 4.54% |
| 5 | Financials | 4.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
326
CME Group
CME
$90.1B
| $852K | 0.06% |
+8,752
| New | +$827K |
|
327
Televisa
TV
$1.48B
| $851K | 0.06% |
32,713
+31,561
| +2,740% | +$832K |
|
328
Aptiv
APTV
$12.3B
| $849K | 0.06% |
13,577
+13,139
| +3,000% | +$918K |
|
329
CALL
Altria Group
MO
$121B
| $848K | 0.06% |
2,749
+1,041
| +61% | +$66.7K |
|
|
BBBY
330
DELISTED
Bed Bath & Beyond Inc
BBBY
| $848K | 0.06% |
19,628
+19,154
| +4,041% | +$868K |
|
|
FL
331
DELISTED
Foot Locker
FL
| $843K | 0.06% |
+15,368
| New | +$891K |
|
332
CALL
Charter Communications
CHTR
$15.9B
| $842K | 0.06% |
520
+182
| +54% | +$39.1K |
|
|
SAGE
333
DELISTED
Sage Therapeutics
SAGE
| $842K | 0.06% |
+27,970
| New | +$933K |
|
|
IHS
334
DELISTED
IHS INC CL-A COM STK
IHS
| $842K | 0.06% |
+7,290
| New | +$875K |
|
335
CALL
Caterpillar
CAT
$410B
| $841K | 0.06% |
3,668
+1,760
| +92% | +$132K |
|
336
PUT
Teva Pharmaceuticals
TEVA
$35.1B
| $832K | 0.06% |
2,128
+1,091
| +105% | +$58.1K |
|
337
Acadia Healthcare
ACHC
$3.2B
| $830K | 0.06% |
14,998
+12,995
| +649% | +$760K |
|
338
PUT
Mastercard
MA
$470B
| $829K | 0.06% |
1,965
+244
| +14% | +$23.3K |
|
339
CALL
Western Digital
WDC
$192B
| $829K | 0.06% |
3,178
+1,928
| +154% | +$63.5K |
|
340
PUT
Deere & Co
DE
$164B
| $826K | 0.06% |
3,955
+928
| +31% | +$76.1K |
|
341
Suncor Energy
SU
$76.4B
| $826K | 0.06% |
+29,791
| New | +$817K |
|
|
ALR
342
DELISTED
Alere Inc
ALR
| $825K | 0.06% |
19,799
-2,413
| -11% | -$105K |
|
343
CALL
Dollar General
DG
$26.5B
| $822K | 0.05% |
424
-381
| -47% | -$32.9K |
|
344
CALL
Gilead Sciences
GILD
$162B
| $822K | 0.05% |
4,133
-1,863
| -31% | -$165K |
|
345
CALL
Energy Transfer Partners
ET
$70.1B
| $821K | 0.05% |
4,404
| – | – |
|
346
Alnylam Pharmaceuticals
ALNY
$35.6B
| $818K | 0.05% |
14,750
+7,648
| +108% | +$482K |
|
|
SOHU
347
Sohu.com
SOHU
$337M
| $818K | 0.05% |
21,611
+9,661
| +81% | +$411K |
|
348
CALL
APA Corp
APA
$12.8B
| $814K | 0.05% |
1,663
-643
| -28% | -$35K |
|
|
PXD
349
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $811K | 0.05% |
775
+57
| +8% | +$8.94K |
|
|
SPA
350
DELISTED
Sparton
SPA
| $810K | 0.05% |
+37,213
| New | +$738K |
|
Similar funds
Simplex Trading's Q2 2016 Portfolio in Review
As of Q2 2016, Simplex Trading held 7,153 positions worth $1.5B, up 19% from $1.25B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading deployed $178M of net new capital in Q2 2016, opening 1,586 new positions and adding to 2,321 existing holdings. Its largest new stake was Biogen: 56,467 shares worth $13.7M.
By sector, the portfolio is most concentrated in Communication Services at 6.6% of assets, down from 6.9% a quarter earlier, followed by Healthcare and Technology.
On the sell side, the largest reduction was Broadcom, an estimated $36.7M trimmed.
- Simplex Trading's largest Q2 2016 buy was Biogen: 56,467 shares worth $13.7M.
- Simplex Trading added most to LinkedIn Corporation in Q2 2016, an estimated $21.4M increase.
- Simplex Trading's biggest Q2 2016 reduction was Broadcom, cutting an estimated $36.7M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q2 2016, selling an estimated $20.1M.
- Simplex Trading's ten largest holdings make up 19% of its $1.5B portfolio in Q2 2016.
- Simplex Trading opened 1,586 new positions and closed 1,363 in Q2 2016.
- Simplex Trading's portfolio value rose 19% quarter-over-quarter to $1.5B.
Based on Simplex Trading's 13F filing for Q2 2016, filed 18 Jul 2016.