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 | |
|---|---|---|---|---|---|---|
1026
PUT
Newell Brands
NWL
$2.16B
| $2.99M | 0.01% |
1,598
-206
| -11% | -$3.32K |
|
1027
CALL
American Water Works
AWK
$26.3B
| $2.98M | 0.01% |
240
-2
| -0.8% | -$241 |
|
1028
CALL
Canadian Imperial Bank of Commerce
CM
$107B
| $2.98M | 0.01% |
722
+554
| +330% | +$21.8K |
|
1029
CALL
Parker-Hannifin
PH
$125B
| $2.98M | 0.01% |
165
+89
| +117% | +$15.1K |
|
|
NVO
1030
CALL
Novo Nordisk
NVO
$216B
| $2.98M | 0.01% |
1,152
+656
| +132% | +$16.6K |
|
1031
CALL
Cboe Global Markets
CBOE
$29.8B
| $2.98M | 0.01% |
259
+35
| +16% | +$4.05K |
|
1032
CALL
Diamondback Energy
FANG
$57.6B
| $2.96M | 0.01% |
329
+139
| +73% | +$13.8K |
|
1033
PUT
RingCentral
RNG
$4.05B
| $2.95M | 0.01% |
235
-27
| -10% | -$3.54K |
|
1034
PUT
State Street
STT
$50.9B
| $2.95M | 0.01% |
499
-356
| -42% | -$19.7K |
|
1035
CALL
Waters Corp
WAT
$36.8B
| $2.95M | 0.01% |
132
+38
| +40% | +$8.2K |
|
|
P
1036
PUT
Everpure Inc
P
$24.8B
| $2.94M | 0.01% |
1,739
+1,633
| +1,541% | +$25.6K |
|
1037
CALL
Quest Diagnostics
DGX
$25.1B
| $2.94M | 0.01% |
275
-160
| -37% | -$16.4K |
|
|
B
1038
Barrick Mining
B
$62.2B
| $2.94M | 0.01% |
+169,730
| New | +$3M |
|
1039
Stanley Black & Decker
SWK
$14.2B
| $2.94M | 0.01% |
20,368
-1,706
| -8% | -$241K |
|
|
AMED
1040
CALL
DELISTED
Amedisys
AMED
| $2.93M | 0.01% |
224
-7
| -3% | -$911 |
|
1041
Invesco S&P 500 Equal Weight ETF
RSP
$96.1B
| $2.93M | 0.01% |
27,148
+25,125
| +1,242% | +$2.7M |
|
1042
CALL
AstraZeneca
AZN
$263B
| $2.93M | 0.01% |
329
-135
| -29% | -$11.7K |
|
1043
PUT
Vornado Realty Trust
VNO
$7.47B
| $2.93M | 0.01% |
460
+242
| +111% | +$15.2K |
|
1044
CALL
Neurocrine Biosciences
NBIX
$17.7B
| $2.92M | 0.01% |
324
-84
| -21% | -$7.85K |
|
1045
PUT
Molson Coors Class B
TAP
$7.68B
| $2.91M | 0.01% |
506
+56
| +12% | +$3.04K |
|
1046
PUT
The GEO Group
GEO
$4.13B
| $2.9M | 0.01% |
1,674
+1,648
| +6,338% | +$29.6K |
|
1047
CALL
AngloGold Ashanti
AU
$40.3B
| $2.89M | 0.01% |
1,584
+1,246
| +369% | +$24.7K |
|
|
PRAH
1048
CALL
DELISTED
PRA Health Sciences, Inc.
PRAH
| $2.89M | 0.01% |
291
+84
| +41% | +$8.34K |
|
1049
CALL
Bausch Health
BHC
$1.65B
| $2.89M | 0.01% |
1,321
-1,600
| -55% | -$36.6K |
|
|
DOCU
1050
PUT
DocuSign
DOCU
$9.63B
| $2.88M | 0.01% |
465
-7
| -1% | -$367 |
|
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.