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 | |
|---|---|---|---|---|---|---|
2076
PUT
RLJ Lodging Trust
RLJ
$1.87B
| $866K | ﹤0.01% |
+510
| New | +$8.66K |
|
2077
BlackBerry
BB
$5.01B
| $864K | ﹤0.01% |
164,747
+22,960
| +16% | +$161K |
|
|
HOLX
2078
DELISTED
Hologic
HOLX
| $864K | ﹤0.01% |
17,126
+16,137
| +1,632% | +$794K |
|
|
AZUL
2079
PUT
DELISTED
Azul
AZUL
| $863K | ﹤0.01% |
241
+186
| +338% | +$6.96K |
|
2080
PUT
Exelixis
EXEL
$13.9B
| $863K | ﹤0.01% |
488
-414
| -46% | -$8.38K |
|
2081
Rockwell Automation
ROK
$51.4B
| $863K | ﹤0.01% |
+5,241
| New | +$828K |
|
|
LGF.B
2082
PUT
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $861K | ﹤0.01% |
932
+786
| +538% | +$8.44K |
|
2083
PUT
Alarm.com
ALRM
$2.56B
| $858K | ﹤0.01% |
184
+129
| +235% | +$6.32K |
|
|
MPT
2084
CALL
Medical Properties Trust
MPT
$2.89B
| $858K | ﹤0.01% |
439
+282
| +180% | +$5.18K |
|
2085
PUT
Digital Realty Trust
DLR
$73.7B
| $856K | ﹤0.01% |
66
-94
| -59% | -$11.4K |
|
2086
National Healthcare
NHC
$3.53B
| $856K | ﹤0.01% |
+10,463
| New | +$866K |
|
2087
CALL
CNX Resources
CNX
$4.85B
| $855K | ﹤0.01% |
1,178
-98
| -8% | -$734 |
|
2088
PUT
Brookfield
BN
$102B
| $852K | ﹤0.01% |
619
-115
| -16% | -$2.08K |
|
|
BPY
2089
CALL
DELISTED
Brookfield Property Partners L.P. Limited Partnership Units
BPY
| $852K | ﹤0.01% |
420
+356
| +556% | +$6.88K |
|
2090
National Grid
NGG
$82.7B
| $851K | ﹤0.01% |
+17,790
| New | +$822K |
|
|
KSU
2091
PUT
DELISTED
Kansas City Southern
KSU
| $851K | ﹤0.01% |
64
+10
| +19% | +$1.25K |
|
|
CONN
2092
CALL
DELISTED
Conn's Inc.
CONN
| $850K | ﹤0.01% |
342
+265
| +344% | +$5.57K |
|
|
SINA
2093
CALL
DELISTED
Sina Corp
SINA
| $850K | ﹤0.01% |
217
-3
| -1% | -$122 |
|
2094
PUT
National Fuel Gas
NFG
$7.84B
| $849K | ﹤0.01% |
181
-33
| -15% | -$1.6K |
|
|
BID
2095
CALL
DELISTED
Sotheby's
BID
| $849K | ﹤0.01% |
149
+12
| +9% | +$695 |
|
|
SPR
2096
CALL
DELISTED
Spirit AeroSystems
SPR
| $847K | ﹤0.01% |
103
-335
| -76% | -$26.2K |
|
2097
iShares MSCI India ETF
INDA
$6.71B
| $846K | ﹤0.01% |
25,217
+24,278
| +2,586% | +$802K |
|
2098
PUT
Box
BOX
$4.02B
| $844K | ﹤0.01% |
510
+104
| +26% | +$1.67K |
|
2099
PUT
Cohu
COHU
$2.39B
| $844K | ﹤0.01% |
625
+565
| +942% | +$7.84K |
|
2100
PUT
Dorman Products
DORM
$4.01B
| $843K | ﹤0.01% |
106
+104
| +5,200% | +$8.07K |
|
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.