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 | |
|---|---|---|---|---|---|---|
851
CALL
WisdomTree US Total Dividend Fund
DTD
$1.63B
| $358K | 0.01% |
2,622
-282
| -10% | -$12.1K |
|
|
MNK
852
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $358K | 0.01% |
+9,597
| New | +$381K |
|
|
CVRR
853
DELISTED
CVR Refining, LP
CVRR
| $358K | 0.01% |
36,376
+27,820
| +325% | +$235K |
|
854
Pan American Silver
PAAS
$18.5B
| $357K | 0.01% |
20,978
+12,085
| +136% | +$208K |
|
855
CALL
Knight Transportation
KNX
$11.7B
| $356K | 0.01% |
+589
| New | +$22.3K |
|
856
PUT
Wynn Resorts
WYNN
$10B
| $356K | 0.01% |
3,062
-335
| -10% | -$45.7K |
|
|
KANG
857
PUT
DELISTED
iKang Healthcare Group, Inc.
KANG
| $356K | 0.01% |
1,221
+339
| +38% | +$4.54K |
|
858
Sunoco
SUN
$14.1B
| $355K | 0.01% |
+11,421
| New | +$356K |
|
859
CALL
Stratasys
SSYS
$693M
| $354K | 0.01% |
442
-116
| -21% | -$2.68K |
|
|
IMMU
860
CALL
DELISTED
Immunomedics Inc
IMMU
| $354K | 0.01% |
788
+189
| +32% | +$1.88K |
|
861
Brunswick
BC
$5.19B
| $353K | 0.01% |
6,324
+3,193
| +102% | +$179K |
|
862
CALL
Macy's
M
$6.12B
| $353K | 0.01% |
2,297
-718
| -24% | -$15.8K |
|
|
WMGI
863
DELISTED
Wright Medical Group Inc
WMGI
| $353K | 0.01% |
13,670
+1,328
| +11% | +$36.6K |
|
864
PUT
Lands' End
LE
$353M
| $352K | 0.01% |
319
+9
| +3% | +$117 |
|
865
OFG Bancorp
OFG
$2.22B
| $351K | 0.01% |
38,459
+1,517
| +4% | +$14.4K |
|
866
CALL
LendingTree
TREE
$551M
| $348K | 0.01% |
64
-146
| -70% | -$31.5K |
|
867
Immersion
IMMR
$217M
| $347K | 0.01% |
42,547
-10,805
| -20% | -$84.6K |
|
868
PUT
Perrigo
PRGO
$1.4B
| $347K | 0.01% |
729
+422
| +137% | +$32.8K |
|
869
CALL
Truist Financial
TFC
$62.4B
| $347K | 0.01% |
1,069
-225
| -17% | -$10.3K |
|
|
PDCE
870
DELISTED
PDC Energy, Inc.
PDCE
| $347K | 0.01% |
7,088
+5,166
| +269% | +$222K |
|
|
SODA
871
DELISTED
SodaStream International Ltd
SODA
| $346K | 0.01% |
5,218
+4,100
| +367% | +$239K |
|
|
KLXI
872
DELISTED
KLX Inc.
KLXI
| $344K | 0.01% |
+7,715
| New | +$328K |
|
|
ANDV
873
CALL
DELISTED
Andeavor
ANDV
| $344K | 0.01% |
898
-122
| -12% | -$12K |
|
874
Anika Therapeutics
ANIK
$196M
| $343K | 0.01% |
+5,931
| New | +$310K |
|
875
CALL
Emerson Electric
EMR
$81.4B
| $343K | 0.01% |
1,540
+55
| +4% | +$3.32K |
|
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.