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 | |
|---|---|---|---|---|---|---|
|
DCP
3401
DELISTED
DCP Midstream, LP
DCP
| $214K | ﹤0.01% |
7,335
-9,712
| -57% | -$303K |
|
|
PGNX
3402
CALL
DELISTED
Progenics Pharmaceuticals Inc
PGNX
| $214K | ﹤0.01% |
+347
| New | +$1.67K |
|
3403
CALL
Advanced Energy
AEIS
$10.9B
| $213K | ﹤0.01% |
38
+8
| +27% | +$429 |
|
3404
PUT
AutoNation
AN
$7.37B
| $213K | ﹤0.01% |
51
-388
| -88% | -$15.4K |
|
|
AZUL
3405
DELISTED
Azul
AZUL
| $213K | ﹤0.01% |
+6,395
| New | +$185K |
|
3406
PUT
Calumet Specialty Products
CLMT
$3.61B
| $213K | ﹤0.01% |
510
+318
| +166% | +$1.27K |
|
3407
CALL
Equitable Holdings
EQH
$13.5B
| $213K | ﹤0.01% |
102
-82
| -45% | -$1.76K |
|
3408
PUT
Green Plains
GPRE
$1.15B
| $213K | ﹤0.01% |
198
-708
| -78% | -$10.5K |
|
3409
CALL
MasterCraft Boat Holdings
MCFT
$607M
| $213K | ﹤0.01% |
109
+9
| +9% | +$205 |
|
|
RDFN
3410
CALL
DELISTED
Redfin
RDFN
| $213K | ﹤0.01% |
119
-210
| -64% | -$4.03K |
|
|
BOLD
3411
DELISTED
Audentes Therapeutics, Inc
BOLD
| $213K | ﹤0.01% |
+5,642
| New | +$217K |
|
|
WLH
3412
PUT
DELISTED
WILLIAM LYON HOMES
WLH
| $213K | ﹤0.01% |
117
+84
| +255% | +$1.51K |
|
|
OPTU
3413
Optimum Communications Inc
OPTU
$298M
| $212K | ﹤0.01% |
+8,737
| New | +$207K |
|
3414
PUT
EnerSys
ENS
$6.69B
| $212K | ﹤0.01% |
31
+29
| +1,450% | +$1.9K |
|
3415
PUT
Gildan
GIL
$9.58B
| $212K | ﹤0.01% |
55
-15
| -21% | -$560 |
|
3416
PUT
Mustang Bio
MBIO
$4.78M
| $212K | ﹤0.01% |
+1
| New | +$2.85K |
|
3417
PUT
Odyssey Marine Exploration
OMEX
$39.4M
| $212K | ﹤0.01% |
367
+113
| +44% | +$592 |
|
3418
CALL
Vipshop
VIPS
$7.13B
| $212K | ﹤0.01% |
246
-39
| -14% | -$314 |
|
|
AMWD
3419
CALL
DELISTED
American Woodmark
AMWD
| $211K | ﹤0.01% |
25
-232
| -90% | -$19.6K |
|
3420
CALL
Jack in the Box
JACK
$308M
| $211K | ﹤0.01% |
26
-30
| -54% | -$2.42K |
|
3421
CALL
Nordson
NDSN
$16.9B
| $211K | ﹤0.01% |
15
-15
| -50% | -$2.06K |
|
3422
PUT
NGL Energy Partners
NGL
$1.87B
| $211K | ﹤0.01% |
143
+77
| +117% | +$1.1K |
|
3423
CALL
Bank OZK
OZK
$5.62B
| $210K | ﹤0.01% |
70
-104
| -60% | -$3.22K |
|
|
AMRS
3424
DELISTED
Amyris Inc.
AMRS
| $210K | ﹤0.01% |
59,181
-33,706
| -36% | -$133K |
|
3425
Community Health Systems
CYH
$393M
| $209K | ﹤0.01% |
78,591
+78,448
| +54,859% | +$248K |
|
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.