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 | |
|---|---|---|---|---|---|---|
976
CALL
Trane Technologies
TT
$106B
| $3.19M | 0.01% |
259
+216
| +502% | +$26.4K |
|
977
CALL
Corpay
CPAY
$24.2B
| $3.18M | 0.01% |
111
-29
| -21% | -$8.43K |
|
978
CALL
Jabil
JBL
$32.8B
| $3.18M | 0.01% |
888
+375
| +73% | +$11.3K |
|
|
GOOS
979
PUT
Canada Goose Holdings
GOOS
$868M
| $3.17M | 0.01% |
722
-31
| -4% | -$1.3K |
|
|
X
980
CALL
DELISTED
US Steel
X
| $3.17M | 0.01% |
2,747
+192
| +8% | +$2.47K |
|
981
CALL
Baxter International
BAX
$11.6B
| $3.17M | 0.01% |
362
-733
| -67% | -$62.6K |
|
982
Citigroup
C
$222B
| $3.17M | 0.01% |
+45,840
| New | +$3.12M |
|
983
CALL
Fastenal
FAST
$54B
| $3.16M | 0.01% |
1,934
-2,442
| -56% | -$38K |
|
984
CALL
Qorvo
QRVO
$7.63B
| $3.16M | 0.01% |
426
+24
| +6% | +$1.74K |
|
985
CALL
Allstate
ALL
$66.9B
| $3.15M | 0.01% |
290
-261
| -47% | -$27.2K |
|
986
PUT
Bath & Body Works
BBWI
$4.01B
| $3.15M | 0.01% |
1,988
+361
| +22% | +$6.37K |
|
987
LKQ Corp
LKQ
$6.58B
| $3.14M | 0.01% |
+99,784
| New | +$2.73M |
|
988
CALL
Welltower
WELL
$178B
| $3.13M | 0.01% |
345
-72
| -17% | -$6.26K |
|
989
CALL
Tyler Technologies
TYL
$12.2B
| $3.12M | 0.01% |
119
+111
| +1,388% | +$27.2K |
|
|
K
990
CALL
DELISTED
Kellanova
K
| $3.12M | 0.01% |
517
-40
| -7% | -$2.29K |
|
991
PUT
Proshares UltraShort Technology
REW
$3.48M
| $3.11M | 0.01% |
15
+3
| +25% | +$3.26K |
|
992
PUT
Campbell Soup
CPB
$6.51B
| $3.11M | 0.01% |
662
+146
| +28% | +$6.3K |
|
993
PUT
Elastic
ESTC
$6.1B
| $3.1M | 0.01% |
377
+263
| +231% | +$23.4K |
|
994
PUT
NovoCure
NVCR
$2.04B
| $3.1M | 0.01% |
415
+245
| +144% | +$19.6K |
|
|
GWPH
995
PUT
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $3.09M | 0.01% |
269
+167
| +164% | +$25.3K |
|
996
Humana
HUM
$46.7B
| $3.09M | 0.01% |
12,098
-12,078
| -50% | -$3.39M |
|
997
PUT
International Flavors & Fragrances
IFF
$19.4B
| $3.09M | 0.01% |
252
+97
| +63% | +$12.4K |
|
998
PUT
Helen of Troy
HELE
$663M
| $3.09M | 0.01% |
196
+182
| +1,300% | +$27K |
|
999
PUT
AstraZeneca
AZN
$263B
| $3.09M | 0.01% |
347
-295
| -46% | -$25.6K |
|
|
AYX
1000
PUT
DELISTED
Alteryx Inc
AYX
| $3.08M | 0.01% |
287
-108
| -27% | -$13.4K |
|
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.