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 | |
|---|---|---|---|---|---|---|
2301
Bausch Health
BHC
$1.65B
| $669K | ﹤0.01% |
+26,545
| New | +$630K |
|
2302
Mercury Systems
MRCY
$6.2B
| $669K | ﹤0.01% |
9,517
+3,529
| +59% | +$245K |
|
2303
Crocs
CROX
$6.69B
| $668K | ﹤0.01% |
+33,851
| New | +$784K |
|
2304
FirstEnergy
FE
$28.9B
| $668K | ﹤0.01% |
15,623
+7,638
| +96% | +$321K |
|
|
HDS
2305
CALL
DELISTED
HD Supply Holdings, Inc.
HDS
| $668K | ﹤0.01% |
166
-679
| -80% | -$29.1K |
|
2306
Madrigal Pharmaceuticals
MDGL
$12.6B
| $666K | ﹤0.01% |
6,359
+2,557
| +67% | +$274K |
|
|
VRNT
2307
PUT
DELISTED
Verint Systems
VRNT
| $666K | ﹤0.01% |
243
-28
| -10% | -$842 |
|
2308
Clearway Energy Class C
CWEN
$5B
| $664K | ﹤0.01% |
+39,396
| New | +$622K |
|
2309
PUT
Valvoline
VVV
$4.97B
| $664K | ﹤0.01% |
340
-4
| -1% | -$74 |
|
|
ANDX
2310
PUT
DELISTED
Andeavor Logistics LP
ANDX
| $664K | ﹤0.01% |
183
+29
| +19% | +$1.02K |
|
|
PRAH
2311
DELISTED
PRA Health Sciences, Inc.
PRAH
| $663K | ﹤0.01% |
+6,691
| New | +$639K |
|
2312
Aptiv
APTV
$12B
| $661K | ﹤0.01% |
8,183
+3,461
| +73% | +$274K |
|
2313
PUT
Principal Financial Group
PFG
$23.6B
| $660K | ﹤0.01% |
114
+25
| +28% | +$1.38K |
|
2314
CALL
Xylem
XYL
$28.5B
| $660K | ﹤0.01% |
79
+68
| +618% | +$5.42K |
|
2315
CALL
Canadian Imperial Bank of Commerce
CM
$107B
| $659K | ﹤0.01% |
168
-600
| -78% | -$24.2K |
|
2316
CALL
Roper Technologies
ROP
$36.3B
| $659K | ﹤0.01% |
18
-33
| -65% | -$11.7K |
|
2317
CALL
Agios Pharmaceuticals
AGIO
$2.16B
| $658K | ﹤0.01% |
132
-86
| -39% | -$4.6K |
|
2318
CALL
Guidewire Software
GWRE
$11.5B
| $658K | ﹤0.01% |
65
+36
| +124% | +$3.67K |
|
|
PRO
2319
CALL
DELISTED
PROS Holdings
PRO
| $657K | ﹤0.01% |
104
-153
| -60% | -$8.05K |
|
|
KSU
2320
PUT
DELISTED
Kansas City Southern
KSU
| $657K | ﹤0.01% |
54
+17
| +46% | +$2.04K |
|
2321
CALL
uniQure
QURE
$2.68B
| $656K | ﹤0.01% |
84
+46
| +121% | +$2.93K |
|
2322
PUT
Teradyne
TER
$54.8B
| $656K | ﹤0.01% |
137
-158
| -54% | -$7.17K |
|
2323
State Street SPDR S&P Homebuilders ETF
XHB
$1.74B
| $656K | ﹤0.01% |
15,753
-43,366
| -73% | -$1.75M |
|
2324
CALL
Aecom
ACM
$9.07B
| $654K | ﹤0.01% |
173
+171
| +8,550% | +$5.68K |
|
2325
CALL
Harrow
HROW
$1.43B
| $654K | ﹤0.01% |
752
+742
| +7,420% | +$4.09K |
|
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.