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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2901
Factset
FDS
$9.46B
| $356K | ﹤0.01% |
+1,245
| New | +$345K |
|
2902
CALL
Coca-Cola Europacific Partners
CCEP
$48.1B
| $355K | ﹤0.01% |
63
-4
| -6% | -$219 |
|
2903
CALL
Fate Therapeutics
FATE
$283M
| $355K | ﹤0.01% |
175
-15
| -8% | -$270 |
|
|
REV
2904
DELISTED
Revlon, Inc.
REV
| $355K | ﹤0.01% |
18,372
-3,675
| -17% | -$80.1K |
|
2905
Appian
APPN
$1.88B
| $354K | ﹤0.01% |
9,823
-3,841
| -28% | -$131K |
|
2906
PUT
Global Partners
GLP
$1.64B
| $354K | ﹤0.01% |
178
+49
| +38% | +$974 |
|
2907
PUT
Vipshop
VIPS
$7.08B
| $354K | ﹤0.01% |
411
-119
| -22% | -$960 |
|
2908
PUT
AMC Entertainment Holdings
AMC
$2.24B
| $353K | ﹤0.01% |
38
+20
| +111% | +$2.67K |
|
2909
Freshpet
FRPT
$2.92B
| $353K | ﹤0.01% |
7,765
+5,498
| +243% | +$249K |
|
|
GTLS
2910
PUT
DELISTED
Chart Industries
GTLS
| $353K | ﹤0.01% |
46
+31
| +207% | +$2.54K |
|
2911
PUT
Ligand Pharmaceuticals
LGND
$5.96B
| $353K | ﹤0.01% |
50
-287
| -85% | -$21.1K |
|
2912
PUT
Lindsay Corp
LNN
$1.17B
| $353K | ﹤0.01% |
43
+5
| +13% | +$418 |
|
2913
PUT
3D Systems Corp
DDD
$430M
| $352K | ﹤0.01% |
387
-58
| -13% | -$549 |
|
2914
Diamondback Energy
FANG
$55.1B
| $352K | ﹤0.01% |
3,235
-12,064
| -79% | -$1.26M |
|
|
CHUY
2915
PUT
DELISTED
Chuy's Holdings, Inc. Common Stock
CHUY
| $352K | ﹤0.01% |
154
+57
| +59% | +$1.23K |
|
|
NS
2916
PUT
DELISTED
NuStar Energy L.P.
NS
| $352K | ﹤0.01% |
130
-110
| -46% | -$2.99K |
|
|
HOME
2917
DELISTED
At Home Group Inc.
HOME
| $352K | ﹤0.01% |
52,892
-80,785
| -60% | -$1.43M |
|
2918
Church & Dwight Co
CHD
$23.4B
| $351K | ﹤0.01% |
4,805
-7,206
| -60% | -$536K |
|
2919
CALL
Huntsman Corp
HUN
$2.06B
| $351K | ﹤0.01% |
172
+106
| +161% | +$2.23K |
|
2920
PUT
Northern Trust
NTRS
$22.4B
| $351K | ﹤0.01% |
39
-39
| -50% | -$3.59K |
|
2921
CALL
Red Robin
RRGB
$136M
| $351K | ﹤0.01% |
115
+95
| +475% | +$2.92K |
|
2922
Illumina
ILMN
$28.7B
| $350K | ﹤0.01% |
978
+733
| +299% | +$231K |
|
2923
CALL
MGIC Investment
MTG
$6.34B
| $349K | ﹤0.01% |
266
+164
| +161% | +$2.28K |
|
|
HA
2924
DELISTED
Hawaiian Holdings, Inc.
HA
| $348K | ﹤0.01% |
+12,711
| New | +$345K |
|
2925
Inspire Medical Systems
INSP
$1.47B
| $347K | ﹤0.01% |
5,724
-2,351
| -29% | -$127K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.