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 |
Amazon
AMZN
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
626
Cleveland-Cliffs
CLF
$6.24B
| $543K | 0.02% |
76,049
-24,672
| -24% | -$184K |
|
627
PUT
Salesforce
CRM
$127B
| $541K | 0.02% |
3,411
-2,689
| -44% | -$247K |
|
|
HZNP
628
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $541K | 0.02% |
42,718
+17,341
| +68% | +$221K |
|
629
Invesco
IVZ
$13.4B
| $540K | 0.02% |
+15,437
| New | +$527K |
|
630
SM Energy
SM
$8.1B
| $539K | 0.02% |
30,429
-7,915
| -21% | -$124K |
|
631
Dick's Sporting Goods
DKS
$18.4B
| $537K | 0.02% |
19,897
+8,963
| +82% | +$285K |
|
632
CALL
Las Vegas Sands
LVS
$30B
| $537K | 0.02% |
1,593
-508
| -24% | -$31.5K |
|
633
CALL
Teladoc Health
TDOC
$1.57B
| $536K | 0.02% |
564
+385
| +215% | +$12.6K |
|
634
PUT
American Airlines Group
AAL
$9.01B
| $535K | 0.02% |
3,105
-825
| -21% | -$39.9K |
|
635
Cardinal Health
CAH
$52.5B
| $533K | 0.02% |
+7,975
| New | +$564K |
|
636
Intercontinental Exchange
ICE
$80.9B
| $533K | 0.02% |
+7,765
| New | +$512K |
|
637
PUT
T-Mobile US
TMUS
$194B
| $533K | 0.02% |
2,054
-3,387
| -62% | -$212K |
|
638
PUT
Chevron
CVX
$393B
| $530K | 0.02% |
3,797
-575
| -13% | -$62.8K |
|
639
PUT
Precigen
PGEN
$1.84B
| $530K | 0.02% |
591
+534
| +937% | +$11K |
|
|
DATA
640
CALL
DELISTED
Tableau Software, Inc.
DATA
| $529K | 0.02% |
259
-111
| -30% | -$7.71K |
|
|
MNDT
641
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $528K | 0.02% |
31,511
+22,456
| +248% | +$345K |
|
642
CALL
Capri Holdings
CPRI
$1.79B
| $526K | 0.02% |
1,486
+834
| +128% | +$33.9K |
|
|
DERM
643
DELISTED
Dermira, Inc.
DERM
| $526K | 0.02% |
19,505
+16,422
| +533% | +$430K |
|
644
PUT
Delta Air Lines
DAL
$53.5B
| $524K | 0.02% |
2,508
-1,179
| -32% | -$58.8K |
|
645
Lexicon Pharmaceuticals
LXRX
$1.01B
| $523K | 0.02% |
+42,616
| New | +$629K |
|
646
PUT
Simon Property Group
SPG
$73.6B
| $522K | 0.02% |
1,322
+489
| +59% | +$78.1K |
|
|
LL
647
DELISTED
LL Flooring Holdings, Inc.
LL
| $518K | 0.02% |
13,312
-272
| -2% | -$9.04K |
|
|
WBA
648
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $517K | 0.02% |
1,944
-2,071
| -52% | -$166K |
|
649
PUT
McDonald's
MCD
$187B
| $515K | 0.02% |
2,526
-525
| -17% | -$82.3K |
|
650
Spectrum Brands
SPB
$2B
| $515K | 0.02% |
4,871
-1,430
| -23% | -$161K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.