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 | |
|---|---|---|---|---|---|---|
2276
CALL
Monster Beverage
MNST
$91.4B
| $689K | ﹤0.01% |
216
-788
| -78% | -$23.7K |
|
2277
CALL
Sprouts Farmers Market
SFM
$7.04B
| $689K | ﹤0.01% |
365
-700
| -66% | -$14.6K |
|
|
JO
2278
DELISTED
iPath Series B Bloomberg Coffee Subindex Total ReturnSM ETN
JO
| $689K | ﹤0.01% |
18,334
+12,684
| +224% | +$424K |
|
2279
Alerian MLP ETF
AMLP
$13B
| $688K | ﹤0.01% |
13,978
+8,796
| +170% | +$435K |
|
2280
Louisiana-Pacific
LPX
$5.2B
| $688K | ﹤0.01% |
26,243
+10,867
| +71% | +$266K |
|
2281
PUT
Keurig Dr Pepper
KDP
$40.4B
| $687K | ﹤0.01% |
238
+1
| +0.4% | +$28 |
|
|
RDUS
2282
PUT
DELISTED
Radius Health, Inc.
RDUS
| $686K | ﹤0.01% |
282
-20
| -7% | -$437 |
|
|
BPL
2283
PUT
DELISTED
Buckeye Partners, L.P.
BPL
| $685K | ﹤0.01% |
167
+85
| +104% | +$3.21K |
|
2284
The Greenbrier Companies
GBX
$1.61B
| $684K | ﹤0.01% |
+22,511
| New | +$715K |
|
2285
Ambarella
AMBA
$2.99B
| $683K | ﹤0.01% |
15,488
+12,428
| +406% | +$557K |
|
2286
CALL
Avery Dennison
AVY
$12.3B
| $682K | ﹤0.01% |
59
+57
| +2,850% | +$6.24K |
|
2287
CALL
Leggett & Platt
LEG
$1.52B
| $682K | ﹤0.01% |
178
-225
| -56% | -$8.87K |
|
2288
CALL
Zimmer Biomet
ZBH
$17.7B
| $682K | ﹤0.01% |
60
-131
| -69% | -$15.3K |
|
2289
CALL
Ralph Lauren
RL
$22.2B
| $681K | ﹤0.01% |
60
+23
| +62% | +$2.76K |
|
|
WAGE
2290
PUT
DELISTED
WageWorks, Inc.
WAGE
| $680K | ﹤0.01% |
134
-627
| -82% | -$29.6K |
|
2291
PUT
Chubb
CB
$140B
| $677K | ﹤0.01% |
46
+44
| +2,200% | +$6.35K |
|
2292
CALL
TransDigm Group
TDG
$69.2B
| $677K | ﹤0.01% |
14
-21
| -60% | -$9.82K |
|
2293
CALL
Omeros
OMER
$709M
| $676K | ﹤0.01% |
431
-856
| -67% | -$15.4K |
|
2294
PUT
Consolidated Edison
ED
$41.6B
| $675K | ﹤0.01% |
77
-4
| -5% | -$345 |
|
|
MGLN
2295
CALL
DELISTED
Magellan Health Services, Inc.
MGLN
| $675K | ﹤0.01% |
91
-1
| -1% | -$67 |
|
2296
J.M. Smucker
SJM
$12.6B
| $670K | ﹤0.01% |
+5,825
| New | +$711K |
|
2297
CALL
Tradeweb Markets
TW
$21.3B
| $670K | ﹤0.01% |
+153
| New | +$6.39K |
|
|
GAP
2298
CALL
The Gap Inc
GAP
$6.84B
| $670K | ﹤0.01% |
373
-499
| -57% | -$11.2K |
|
|
FNSR
2299
CALL
DELISTED
Finisar Corp
FNSR
| $670K | ﹤0.01% |
293
-539
| -65% | -$12.4K |
|
2300
PUT
Airgain
AIRG
$74.3M
| $669K | ﹤0.01% |
+473
| New | +$6.83K |
|
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.