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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
901
CALL
Vulcan Materials
VMC
$36.3B
| $3.66M | 0.01% |
242
+60
| +33% | +$8.47K |
|
902
PUT
Aptiv
APTV
$12B
| $3.65M | 0.01% |
418
+179
| +75% | +$15K |
|
|
STI
903
CALL
DELISTED
SunTrust Banks, Inc.
STI
| $3.65M | 0.01% |
531
-626
| -54% | -$40.1K |
|
904
GE Aerospace
GE
$367B
| $3.63M | 0.01% |
81,560
-73,298
| -47% | -$3.44M |
|
905
CALL
Dentsply Sirona
XRAY
$2.59B
| $3.63M | 0.01% |
680
+117
| +21% | +$6.29K |
|
|
CBPO
906
PUT
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $3.62M | 0.01% |
316
+285
| +919% | +$28.3K |
|
907
PUT
Albemarle
ALB
$13.5B
| $3.62M | 0.01% |
520
+183
| +54% | +$12.5K |
|
908
ServiceNow
NOW
$102B
| $3.61M | 0.01% |
+71,165
| New | +$3.87M |
|
909
PUT
AvalonBay Communities
AVB
$27.1B
| $3.6M | 0.01% |
167
+123
| +280% | +$25.7K |
|
|
NVO
910
PUT
Novo Nordisk
NVO
$216B
| $3.56M | 0.01% |
1,378
+1,086
| +372% | +$27.5K |
|
911
CALL
Shake Shack
SHAK
$2.3B
| $3.56M | 0.01% |
363
+50
| +16% | +$4.42K |
|
912
CALL
Cintas
CTAS
$82.4B
| $3.54M | 0.01% |
528
+156
| +42% | +$9.99K |
|
913
CALL
Viatris
VTRS
$20.1B
| $3.54M | 0.01% |
1,788
+461
| +35% | +$9.04K |
|
|
MOMO
914
CALL
Hello Group
MOMO
$869M
| $3.53M | 0.01% |
1,140
+611
| +116% | +$20.7K |
|
915
CALL
Enterprise Products Partners
EPD
$83.8B
| $3.53M | 0.01% |
1,235
-287
| -19% | -$8.36K |
|
916
PUT
Trex
TREX
$4.51B
| $3.53M | 0.01% |
776
+582
| +300% | +$23.5K |
|
917
CALL
Exelon
EXC
$48.6B
| $3.53M | 0.01% |
1,023
+715
| +232% | +$24K |
|
918
CALL
Royal Bank of Canada
RY
$291B
| $3.52M | 0.01% |
434
+5
| +1% | +$390 |
|
|
ABMD
919
CALL
DELISTED
Abiomed Inc
ABMD
| $3.52M | 0.01% |
198
-286
| -59% | -$61.8K |
|
920
CALL
Under Armour Class C
UA
$2.92B
| $3.52M | 0.01% |
1,809
+274
| +18% | +$5.4K |
|
|
CONE
921
CALL
DELISTED
CyrusOne Inc Common Stock
CONE
| $3.51M | 0.01% |
444
+402
| +957% | +$26.8K |
|
922
CALL
O'Reilly Automotive
ORLY
$72.4B
| $3.51M | 0.01% |
1,320
+1,020
| +340% | +$26.3K |
|
|
WW
923
CALL
DELISTED
WW International
WW
| $3.5M | 0.01% |
926
+7
| +0.8% | +$198 |
|
924
PUT
Hasbro
HAS
$12.6B
| $3.5M | 0.01% |
295
-79
| -21% | -$9K |
|
925
CALL
Ambarella
AMBA
$2.99B
| $3.49M | 0.01% |
556
+163
| +41% | +$8.46K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.