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 | |
|---|---|---|---|---|---|---|
651
CALL
Lowe's Companies
LOW
$115B
| $399K | 0.02% |
1,437
-878
| -38% | -$62.1K |
|
|
ETFC
652
CALL
DELISTED
E*Trade Financial Corporation
ETFC
| $399K | 0.02% |
1,235
-124
| -9% | -$3.96K |
|
653
CALL
Walmart Inc
WMT
$870B
| $398K | 0.02% |
9,420
-3,330
| -26% | -$77.7K |
|
654
PUT
Best Buy
BBY
$18.4B
| $397K | 0.02% |
1,806
+1,097
| +155% | +$46.6K |
|
655
Quanta Services
PWR
$96.5B
| $397K | 0.02% |
+11,408
| New | +$358K |
|
|
CCMP
656
DELISTED
CMC Materials, Inc. Common Stock
CCMP
| $396K | 0.02% |
6,272
-14,572
| -70% | -$842K |
|
|
STMP
657
DELISTED
Stamps.com, Inc.
STMP
| $396K | 0.02% |
+3,460
| New | +$360K |
|
|
YHOO
658
PUT
DELISTED
Yahoo Inc
YHOO
| $395K | 0.02% |
2,800
-3,476
| -55% | -$143K |
|
|
ALXN
659
PUT
DELISTED
Alexion Pharmaceuticals
ALXN
| $394K | 0.02% |
720
-43
| -6% | -$5.26K |
|
|
SODA
660
DELISTED
SodaStream International Ltd
SODA
| $393K | 0.02% |
9,974
+449
| +5% | +$14.5K |
|
661
PUT
Halliburton
HAL
$27.6B
| $392K | 0.02% |
3,190
+958
| +43% | +$47.8K |
|
662
ProShares UltraPro Russell2000
URTY
$333M
| $392K | 0.02% |
6,620
+670
| +11% | +$34K |
|
663
PUT
Wheaton Precious Metals
WPM
$50.6B
| $391K | 0.02% |
1,387
-11
| -0.8% | -$229 |
|
|
S
664
CALL
DELISTED
Sprint Corporation
S
| $391K | 0.02% |
1,682
+449
| +36% | +$3.32K |
|
|
EMES
665
PUT
DELISTED
Emerge Energy Services LP
EMES
| $391K | 0.02% |
197
-67
| -25% | -$822 |
|
|
LTC
666
LTC Properties
LTC
$2.16B
| $390K | 0.02% |
8,317
+4,567
| +122% | +$216K |
|
667
Pediatrix Medical
MD
$2.12B
| $390K | 0.02% |
5,863
+5,306
| +953% | +$345K |
|
668
Viatris
VTRS
$19.8B
| $390K | 0.02% |
10,244
-6,678
| -39% | -$248K |
|
|
MYCC
669
DELISTED
ClubCorp Holdings, Inc.
MYCC
| $390K | 0.02% |
27,182
+19,872
| +272% | +$264K |
|
670
CubeSmart
CUBE
$9.31B
| $389K | 0.02% |
+14,550
| New | +$373K |
|
671
Urban Outfitters
URBN
$6.31B
| $389K | 0.02% |
+13,681
| New | +$461K |
|
672
CALL
Zions Bancorporation
ZION
$10.2B
| $389K | 0.02% |
419
+27
| +7% | +$995 |
|
|
SHLD
673
PUT
DELISTED
Sears Holding Corporation
SHLD
| $388K | 0.02% |
824
+391
| +90% | +$4.46K |
|
674
Canadian Pacific Kansas City
CP
$81.1B
| $387K | 0.02% |
13,575
+150
| +1% | +$4.43K |
|
|
675
Lowe's Companies
LOW
$115B
| $385K | 0.02% |
+5,417
| New | +$383K |
|
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.