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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3526
uniQure
QURE
$2.63B
| $224K | ﹤0.01% |
6,179
-6,932
| -53% | -$258K |
|
|
CCXI
3527
DELISTED
ChemoCentryx, Inc.
CCXI
| $224K | ﹤0.01% |
17,754
+9,030
| +104% | +$109K |
|
|
SAIL
3528
CALL
DELISTED
SailPoint Technologies Holdings, Inc. Common Stock
SAIL
| $224K | ﹤0.01% |
66
+43
| +187% | +$1.25K |
|
|
NE
3529
PUT
DELISTED
Noble Corporation
NE
| $224K | ﹤0.01% |
319
+63
| +25% | +$382 |
|
|
BPL
3530
CALL
DELISTED
Buckeye Partners, L.P.
BPL
| $224K | ﹤0.01% |
63
-150
| -70% | -$5.37K |
|
3531
CALL
Artisan Partners
APAM
$2.86B
| $223K | ﹤0.01% |
69
+68
| +6,800% | +$2.22K |
|
3532
CALL
Logitech
LOGI
$15.5B
| $223K | ﹤0.01% |
50
+2
| +4% | +$93 |
|
3533
PUT
Nasdaq
NDAQ
$52.5B
| $223K | ﹤0.01% |
78
-75
| -49% | -$2.31K |
|
3534
ProShares Short VIX Short-Term Futures ETF
SVXY
$223M
| $223K | ﹤0.01% |
7,570
-26,489
| -78% | -$743K |
|
3535
CALL
First Majestic Silver
AG
$8.01B
| $222K | ﹤0.01% |
391
-2
| -0.5% | -$12 |
|
3536
Groupon
GRPN
$1.05B
| $222K | ﹤0.01% |
2,957
+2,349
| +386% | +$207K |
|
3537
CALL
MakeMyTrip
MMYT
$4.97B
| $222K | ﹤0.01% |
81
-32
| -28% | -$1.02K |
|
|
AVEO
3538
PUT
DELISTED
AVEO Pharmaceuticals, Inc.
AVEO
| $222K | ﹤0.01% |
67
+50
| +294% | +$1.28K |
|
3539
CALL
National Vision
EYE
$1.66B
| $221K | ﹤0.01% |
49
-110
| -69% | -$4.64K |
|
3540
PUT
Host Hotels & Resorts
HST
$17.1B
| $221K | ﹤0.01% |
105
-2
| -2% | -$42 |
|
3541
CALL
LKQ Corp
LKQ
$6.69B
| $221K | ﹤0.01% |
70
-342
| -83% | -$11.4K |
|
3542
Oppenheimer Holdings
OPY
$1.18B
| $221K | ﹤0.01% |
7,023
+4,633
| +194% | +$143K |
|
3543
PUT
Repligen
RGEN
$7.39B
| $221K | ﹤0.01% |
+40
| New | +$2.06K |
|
3544
WEX
WEX
$6.17B
| $221K | ﹤0.01% |
1,103
+861
| +356% | +$165K |
|
|
ATHX
3545
CALL
DELISTED
Athersys, Inc. Common Stock
ATHX
| $221K | ﹤0.01% |
42
+2
| +5% | +$99 |
|
3546
Cintas
CTAS
$84.4B
| $220K | ﹤0.01% |
4,468
-5,076
| -53% | -$262K |
|
|
OPLN
3547
CALL
Openlane
OPLN
$4.25B
| $220K | ﹤0.01% |
98
-333
| -77% | -$7.69K |
|
3548
CALL
United States Gasoline Fund
UGA
$143M
| $220K | ﹤0.01% |
61
+41
| +205% | +$1.39K |
|
3549
CALL
Evergy
EVRG
$19.8B
| $219K | ﹤0.01% |
40
+13
| +48% | +$735 |
|
3550
Zscaler
ZS
$23.8B
| $219K | ﹤0.01% |
+5,371
| New | +$217K |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.