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 | |
|---|---|---|---|---|---|---|
426
CALL
Zillow
Z
$7.18B
| $648K | 0.04% |
968
+245
| +34% | +$6.79K |
|
|
APC
427
CALL
DELISTED
Anadarko Petroleum
APC
| $647K | 0.04% |
2,079
-1,308
| -39% | -$66.3K |
|
|
SCG
428
DELISTED
Scana
SCG
| $647K | 0.04% |
8,556
+7,541
| +743% | +$528K |
|
429
PBF Energy
PBF
$7.61B
| $646K | 0.04% |
27,205
+24,263
| +825% | +$698K |
|
430
AerCap
AER
$23.7B
| $645K | 0.04% |
19,213
+11,623
| +153% | +$446K |
|
431
Barclays
BCS
$94.8B
| $644K | 0.04% |
+90,518
| New | +$814K |
|
|
SKX
432
DELISTED
Skechers
SKX
| $643K | 0.04% |
+21,658
| New | +$654K |
|
433
CALL
General Mills
GIS
$19.7B
| $642K | 0.04% |
951
+277
| +41% | +$17.6K |
|
434
CALL
Northrop Grumman
NOC
$74.6B
| $639K | 0.04% |
297
+233
| +364% | +$49K |
|
|
ESV
435
DELISTED
Ensco Rowan plc
ESV
| $639K | 0.04% |
16,458
+15,751
| +2,228% | +$654K |
|
436
United Parks & Resorts
PRKS
$2.13B
| $636K | 0.04% |
44,451
+33,274
| +298% | +$602K |
|
|
TYNS
437
PUT
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $636K | 0.04% |
2,404
-1,682
| -41% | -$46.9K |
|
438
iShares Russell Mid-Cap Value ETF
IWS
$15.6B
| $633K | 0.04% |
8,527
+3,116
| +58% | +$226K |
|
439
PUT
Blackstone
BX
$150B
| $630K | 0.04% |
1,360
-4,053
| -75% | -$108K |
|
440
CALL
Comcast
CMCSA
$84B
| $630K | 0.04% |
5,962
+1,390
| +30% | +$43.2K |
|
441
Stanley Black & Decker
SWK
$13.9B
| $629K | 0.04% |
+5,663
| New | +$630K |
|
442
Fortuna Silver Mines
FSM
$2.61B
| $628K | 0.04% |
90,072
+84,898
| +1,641% | +$494K |
|
443
Guidewire Software
GWRE
$11.2B
| $628K | 0.04% |
+10,180
| New | +$587K |
|
444
PUT
McDonald's
MCD
$187B
| $628K | 0.04% |
4,971
-264
| -5% | -$33.1K |
|
445
Yelp
YELP
$1.36B
| $623K | 0.04% |
20,529
+10,108
| +97% | +$246K |
|
446
KB Home
KBH
$3.46B
| $620K | 0.04% |
40,767
+39,177
| +2,464% | +$547K |
|
|
SWIR
447
DELISTED
Sierra Wireless
SWIR
| $619K | 0.04% |
36,515
-3,933
| -10% | -$67.9K |
|
448
Capital One
COF
$124B
| $616K | 0.04% |
+9,704
| New | +$676K |
|
449
Teleflex
TFX
$5.97B
| $612K | 0.04% |
+3,455
| New | +$563K |
|
450
CALL
United States Oil Fund
USO
$2.36B
| $610K | 0.04% |
406
-421
| -51% | -$37.7K |
|
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.