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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
426
PUT
Nike
NKE
$62.6B
| $640K | 0.04% |
2,700
-2,025
| -43% | -$104K |
|
427
PUT
Freeport-McMoran
FCX
$93.4B
| $639K | 0.04% |
6,667
+70
| +1% | +$896 |
|
428
CALL
BP
BP
$112B
| $638K | 0.04% |
3,455
+1,122
| +48% | +$33.8K |
|
429
iShares US Home Construction ETF
ITB
$2.37B
| $638K | 0.04% |
+23,235
| New | +$631K |
|
|
AHGP
430
DELISTED
Alliance Holdings GP
AHGP
| $636K | 0.04% |
22,649
-6,108
| -21% | -$175K |
|
431
CALL
Autodesk
ADSK
$43B
| $633K | 0.04% |
1,077
+503
| +88% | +$37K |
|
432
Micron Technology
MU
$1.08T
| $633K | 0.04% |
+28,909
| New | +$543K |
|
|
XL
433
DELISTED
XL Group Ltd.
XL
| $633K | 0.04% |
+17,010
| New | +$610K |
|
|
MXIM
434
DELISTED
Maxim Integrated Products
MXIM
| $632K | 0.04% |
16,405
-9,018
| -35% | -$354K |
|
435
Amdocs
DOX
$5.44B
| $631K | 0.04% |
10,834
+10,346
| +2,120% | +$610K |
|
436
Rockwell Automation
ROK
$51B
| $631K | 0.04% |
4,697
+4,068
| +647% | +$520K |
|
437
PUT
Expedia Group
EXPE
$31.3B
| $630K | 0.04% |
989
-372
| -27% | -$45.4K |
|
438
Safety Insurance
SAFT
$1.06B
| $629K | 0.04% |
8,536
+1,727
| +25% | +$121K |
|
439
CNX Resources
CNX
$4.9B
| $628K | 0.04% |
+41,390
| New | +$653K |
|
440
ProShares UltraPro Dow 30
UDOW
$864M
| $628K | 0.04% |
53,008
+42,776
| +418% | +$441K |
|
441
CALL
Applied Materials
AMAT
$440B
| $627K | 0.04% |
2,714
-262
| -9% | -$7.97K |
|
442
CALL
General Motors
GM
$74.1B
| $625K | 0.04% |
3,276
+1,999
| +157% | +$67.2K |
|
|
CVGW
443
DELISTED
Calavo Growers
CVGW
| $622K | 0.04% |
+10,136
| New | +$617K |
|
444
F5
FFIV
$22.6B
| $622K | 0.04% |
4,303
-16,396
| -79% | -$2.22M |
|
445
BCE
BCE
$20B
| $621K | 0.04% |
+14,378
| New | +$635K |
|
446
Centene
CNC
$32.5B
| $621K | 0.04% |
+21,996
| New | +$649K |
|
447
PUT
Chevron
CVX
$384B
| $615K | 0.04% |
3,575
+958
| +37% | +$104K |
|
448
iShares Select Dividend ETF
DVY
$23.8B
| $614K | 0.04% |
+6,933
| New | +$597K |
|
449
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
$372M
| $612K | 0.04% |
549
+505
| +1,148% | +$896K |
|
450
The Mosaic Company
MOS
$7.24B
| $612K | 0.04% |
20,882
-114,931
| -85% | -$3.08M |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.