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 | |
|---|---|---|---|---|---|---|
|
SINA
2501
PUT
DELISTED
Sina Corp
SINA
| $534K | ﹤0.01% |
124
-192
| -61% | -$10.1K |
|
2502
Children's Place
PLCE
$53.6M
| $533K | ﹤0.01% |
5,590
+1,710
| +44% | +$175K |
|
|
AMRS
2503
PUT
DELISTED
Amyris Inc.
AMRS
| $532K | ﹤0.01% |
1,495
+166
| +12% | +$654 |
|
2504
PUT
Aflac
AFL
$63.9B
| $531K | ﹤0.01% |
97
-37
| -28% | -$1.91K |
|
2505
CALL
BJ's Restaurants
BJRI
$1.41B
| $531K | ﹤0.01% |
121
-64
| -35% | -$2.93K |
|
2506
CALL
GrafTech
EAF
$194M
| $530K | ﹤0.01% |
46
-23
| -33% | -$2.7K |
|
|
ZUO
2507
PUT
DELISTED
Zuora, Inc.
ZUO
| $530K | ﹤0.01% |
346
+185
| +115% | +$3.5K |
|
|
RP
2508
PUT
DELISTED
RealPage, Inc.
RP
| $529K | ﹤0.01% |
90
+49
| +120% | +$2.97K |
|
2509
CALL
A.O. Smith
AOS
$8.38B
| $528K | ﹤0.01% |
112
+75
| +203% | +$3.68K |
|
2510
CALL
Integer Holdings
ITGR
$3.35B
| $528K | ﹤0.01% |
63
+40
| +174% | +$3K |
|
2511
Tucows
TCX
$97.1M
| $528K | ﹤0.01% |
+8,667
| New | +$623K |
|
2512
Valmont Industries
VMI
$9.44B
| $528K | ﹤0.01% |
4,165
-2,959
| -42% | -$369K |
|
2513
PUT
Appian
APPN
$1.74B
| $526K | ﹤0.01% |
146
-235
| -62% | -$8.04K |
|
|
FOLD
2514
CALL
DELISTED
Amicus Therapeutics
FOLD
| $526K | ﹤0.01% |
422
-251
| -37% | -$3.19K |
|
2515
CALL
G-III Apparel Group
GIII
$1.47B
| $526K | ﹤0.01% |
179
+113
| +171% | +$3.85K |
|
2516
PUT
Affiliated Managers Group
AMG
$9.46B
| $525K | ﹤0.01% |
57
-394
| -87% | -$38.7K |
|
2517
Melco Resorts & Entertainment
MLCO
$2.1B
| $525K | ﹤0.01% |
24,193
+13,518
| +127% | +$307K |
|
2518
CALL
Nokia
NOK
$50.8B
| $524K | ﹤0.01% |
1,047
-1,033
| -50% | -$5.44K |
|
2519
BGC Group
BGC
$5.58B
| $523K | ﹤0.01% |
100,088
+5,421
| +6% | +$28.1K |
|
|
GPMT
2520
PUT
Granite Point Mortgage Trust
GPMT
$63.7M
| $523K | ﹤0.01% |
273
-20
| -7% | -$381 |
|
|
HBI
2521
CALL
DELISTED
Hanesbrands
HBI
| $523K | ﹤0.01% |
304
-4
| -1% | -$69 |
|
|
ENLC
2522
CALL
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $523K | ﹤0.01% |
519
+98
| +23% | +$1.1K |
|
|
SHLX
2523
CALL
DELISTED
Shell Midstream Partners, L.P.
SHLX
| $522K | ﹤0.01% |
252
-72
| -22% | -$1.48K |
|
2524
Dick's Sporting Goods
DKS
$18.4B
| $520K | ﹤0.01% |
+15,020
| New | +$550K |
|
2525
PUT
Viper Energy
VNOM
$8.81B
| $520K | ﹤0.01% |
169
+74
| +78% | +$2.29K |
|
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.