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 | |
|---|---|---|---|---|---|---|
2851
PUT
Nomad Foods
NOMD
$1.67B
| $395K | ﹤0.01% |
193
+109
| +130% | +$2.32K |
|
|
ZNGA
2852
CALL
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $395K | ﹤0.01% |
679
-269
| -28% | -$1.62K |
|
2853
CALL
NiSource
NI
$22B
| $394K | ﹤0.01% |
132
-427
| -76% | -$12.5K |
|
2854
PUT
Q2 Holdings
QTWO
$3.64B
| $394K | ﹤0.01% |
50
+46
| +1,150% | +$3.8K |
|
2855
CALL
CoreCivic
CXW
$3.09B
| $393K | ﹤0.01% |
228
+176
| +338% | +$3.1K |
|
|
TVTY
2856
CALL
DELISTED
Tivity Health, Inc. Common Stock
TVTY
| $393K | ﹤0.01% |
237
-185
| -44% | -$3.2K |
|
2857
CALL
Axos Financial
AX
$5.45B
| $392K | ﹤0.01% |
142
+4
| +3% | +$108 |
|
2858
Zymeworks
ZYME
$1.69B
| $392K | ﹤0.01% |
15,832
+3,391
| +27% | +$85K |
|
2859
Huntington Ingalls Industries
HII
$11.4B
| $391K | ﹤0.01% |
1,848
+360
| +24% | +$78.4K |
|
|
AUY
2860
PUT
DELISTED
Yamana Gold, Inc.
AUY
| $391K | ﹤0.01% |
1,232
+309
| +33% | +$986 |
|
2861
PUT
Vanguard High Dividend Yield ETF
VYM
$81.3B
| $390K | ﹤0.01% |
44
-10
| -19% | -$875 |
|
2862
CALL
Xylem
XYL
$28.6B
| $390K | ﹤0.01% |
49
-30
| -38% | -$2.36K |
|
|
ATRS
2863
PUT
DELISTED
Antares Pharma, Inc.
ATRS
| $390K | ﹤0.01% |
1,166
+422
| +57% | +$1.39K |
|
2864
PUT
Brown-Forman Class B
BF.B
$12.6B
| $389K | ﹤0.01% |
62
+55
| +786% | +$3.21K |
|
2865
CALL
Kinross Gold
KGC
$28.6B
| $389K | ﹤0.01% |
846
+613
| +263% | +$2.85K |
|
2866
Coeur Mining
CDE
$15.8B
| $388K | ﹤0.01% |
80,771
+22,963
| +40% | +$114K |
|
2867
PUT
CareDx
CDNA
$1.88B
| $388K | ﹤0.01% |
172
+153
| +805% | +$4.24K |
|
2868
Caesarstone
CSTE
$75.7M
| $388K | ﹤0.01% |
23,360
+17,291
| +285% | +$264K |
|
2869
CALL
Gray Television
GTN
$409M
| $388K | ﹤0.01% |
238
-145
| -38% | -$2.38K |
|
2870
PUT
Kratos Defense & Security Solutions
KTOS
$9.27B
| $388K | ﹤0.01% |
209
+73
| +54% | +$1.53K |
|
|
CHU
2871
CALL
DELISTED
China Unicom (HONG KONG) Limited
CHU
| $388K | ﹤0.01% |
370
+161
| +77% | +$1.64K |
|
2872
PUT
Ollie's Bargain Outlet
OLLI
$4.04B
| $387K | ﹤0.01% |
66
-56
| -46% | -$4.2K |
|
|
WBC
2873
PUT
DELISTED
WABCO HOLDINGS INC.
WBC
| $387K | ﹤0.01% |
29
-78
| -73% | -$10.4K |
|
|
CY
2874
CALL
DELISTED
Cypress Semiconductor
CY
| $387K | ﹤0.01% |
166
-1,805
| -92% | -$41.3K |
|
2875
PUT
Bloomin' Brands
BLMN
$731M
| $386K | ﹤0.01% |
204
+119
| +140% | +$2.12K |
|
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.