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 | |
|---|---|---|---|---|---|---|
|
SDRL
2626
PUT
DELISTED
Seadrill Limited Common Stock
SDRL
| $468K | ﹤0.01% |
1,125
+208
| +23% | +$1.37K |
|
|
I
2627
DELISTED
INTELSAT S. A.
I
| $468K | ﹤0.01% |
24,067
+22,908
| +1,977% | +$444K |
|
2628
PUT
Compass Minerals
CMP
$1.22B
| $467K | ﹤0.01% |
85
-36
| -30% | -$1.99K |
|
2629
CALL
Immunic
IMUX
$188M
| $467K | ﹤0.01% |
+41
| New | +$5.39K |
|
2630
CALL
Progress Software
PRGS
$1.62B
| $466K | ﹤0.01% |
107
-29
| -21% | -$1.26K |
|
|
ZNGA
2631
PUT
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $466K | ﹤0.01% |
761
-2
| -0.3% | -$12 |
|
|
STAY
2632
CALL
DELISTED
Extended Stay America, Inc. Paired Share Unit
STAY
| $466K | ﹤0.01% |
276
+234
| +557% | +$4.13K |
|
2633
CALL
Inseego
INSG
$113M
| $465K | ﹤0.01% |
97
+59
| +155% | +$2.77K |
|
2634
CALL
Ichor Holdings
ICHR
$2.78B
| $463K | ﹤0.01% |
196
+66
| +51% | +$1.54K |
|
2635
PUT
AnaptysBio
ANAB
$1.61B
| $462K | ﹤0.01% |
82
+56
| +215% | +$4.03K |
|
|
JOYY
2636
JOYY Inc
JOYY
$3.75B
| $462K | ﹤0.01% |
6,632
-19,932
| -75% | -$1.52M |
|
|
MTSC
2637
CALL
DELISTED
MTS Systems Corp
MTSC
| $462K | ﹤0.01% |
79
+49
| +163% | +$2.73K |
|
2638
National Health Investors
NHI
$3.88B
| $461K | ﹤0.01% |
5,918
+4,533
| +327% | +$352K |
|
2639
CALL
TriNet
TNET
$2.95B
| $461K | ﹤0.01% |
68
| – | – |
|
2640
PUT
Korn Ferry
KFY
$4.07B
| $460K | ﹤0.01% |
115
+112
| +3,733% | +$5.09K |
|
2641
CALL
Sociedad Química y Minera de Chile
SQM
$19.5B
| $460K | ﹤0.01% |
148
-214
| -59% | -$7.3K |
|
2642
CALL
Frontline
FRO
$8.68B
| $459K | ﹤0.01% |
574
+176
| +44% | +$1.4K |
|
2643
CALL
Pilgrim's Pride
PPC
$6.98B
| $459K | ﹤0.01% |
181
+145
| +403% | +$3.75K |
|
2644
Sea Limited
SE
$64.1B
| $459K | ﹤0.01% |
13,834
-58,347
| -81% | -$1.58M |
|
|
TWO
2645
CALL
Two Harbors Investment
TWO
$1.27B
| $458K | ﹤0.01% |
91
+80
| +727% | +$4.2K |
|
|
COUP
2646
DELISTED
Coupa Software Incorporated
COUP
| $458K | ﹤0.01% |
3,624
-38,882
| -91% | -$4.17M |
|
2647
CALL
Boyd Gaming
BYD
$6.59B
| $457K | ﹤0.01% |
170
+85
| +100% | +$2.32K |
|
2648
PUT
Logitech
LOGI
$15.3B
| $457K | ﹤0.01% |
115
-411
| -78% | -$16K |
|
2649
STAAR Surgical
STAA
$1.15B
| $457K | ﹤0.01% |
15,587
+11,174
| +253% | +$323K |
|
|
SHLX
2650
PUT
DELISTED
Shell Midstream Partners, L.P.
SHLX
| $457K | ﹤0.01% |
221
+204
| +1,200% | +$4.19K |
|
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.