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 | |
|---|---|---|---|---|---|---|
301
iShares Core S&P Total US Stock Market ETF
ITOT
$94.5B
| $924K | 0.06% |
19,420
+18,670
| +2,489% | +$881K |
|
302
PUT
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $916K | 0.06% |
7,690
+1,198
| +18% | +$44.9K |
|
303
DXP Enterprises
DXPE
$2.7B
| $911K | 0.06% |
+61,080
| New | +$1.03M |
|
304
CALL
Bristol-Myers Squibb
BMY
$124B
| $908K | 0.06% |
3,572
+2,148
| +151% | +$152K |
|
305
Illinois Tool Works
ITW
$79B
| $904K | 0.06% |
+8,680
| New | +$909K |
|
306
Aon
AON
$75.3B
| $903K | 0.06% |
+8,276
| New | +$875K |
|
307
Idexx Laboratories
IDXX
$43.2B
| $903K | 0.06% |
9,725
+9,473
| +3,759% | +$813K |
|
308
PUT
American Airlines Group
AAL
$10.1B
| $901K | 0.06% |
2,871
+1,667
| +138% | +$56.3K |
|
|
B
309
Barrick Mining
B
$62.4B
| $900K | 0.06% |
+42,199
| New | +$752K |
|
|
EGN
310
DELISTED
Energen
EGN
| $894K | 0.06% |
18,564
+493
| +3% | +$21.5K |
|
|
HTWR
311
DELISTED
HEARTWARE INTERNATIONAL INC COM STK (DE)
HTWR
| $894K | 0.06% |
15,483
+13,598
| +721% | +$445K |
|
312
Spectrum Brands
SPB
$2.05B
| $890K | 0.06% |
7,464
+4,594
| +160% | +$528K |
|
313
Motorola Solutions
MSI
$67.1B
| $886K | 0.06% |
+13,442
| New | +$956K |
|
314
CALL
NVIDIA
NVDA
$5.19T
| $884K | 0.06% |
58,400
-19,880
| -25% | -$20.5K |
|
315
CALL
Wheaton Precious Metals
WPM
$50.5B
| $884K | 0.06% |
2,420
+789
| +48% | +$15.2K |
|
|
GAS
316
DELISTED
AGL Resources Inc
GAS
| $884K | 0.06% |
13,401
+5,339
| +66% | +$351K |
|
317
CALL
iShares Silver Trust
SLV
$29B
| $878K | 0.06% |
4,649
-1,921
| -29% | -$30.7K |
|
318
PUT
Amgen
AMGN
$199B
| $876K | 0.06% |
3,094
+764
| +33% | +$119K |
|
319
PUT
Caterpillar
CAT
$413B
| $874K | 0.06% |
3,158
-1,413
| -31% | -$106K |
|
320
Rockwell Automation
ROK
$51.6B
| $869K | 0.06% |
7,575
+2,914
| +63% | +$334K |
|
321
Weibo
WB
$1.94B
| $869K | 0.06% |
30,620
+23,152
| +310% | +$563K |
|
322
CALL
Salesforce
CRM
$133B
| $868K | 0.06% |
1,596
+88
| +6% | +$6.91K |
|
323
GameStop
GME
$9.75B
| $866K | 0.06% |
+130,380
| New | +$954K |
|
|
BNY
324
Bank of New York Mellon
BNY
$110B
| $857K | 0.06% |
22,063
+20,655
| +1,467% | +$822K |
|
325
Mohawk Industries
MHK
$6.66B
| $855K | 0.06% |
4,509
-150
| -3% | -$29.2K |
|
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.