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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1676
PUT
Marvell Technology
MRVL
$174B
| $949K | ﹤0.01% |
587
-450
| -43% | -$7.46K |
|
|
CVGW
1677
CALL
DELISTED
Calavo Growers
CVGW
| $948K | ﹤0.01% |
130
-31
| -19% | -$2.9K |
|
1678
PUT
Vanguard Consumer Discretionary ETF
VCR
$5.84B
| $948K | ﹤0.01% |
73
+63
| +630% | +$10.2K |
|
1679
CALL
Jacobs Solutions
J
$15.9B
| $947K | ﹤0.01% |
196
+33
| +20% | +$1.89K |
|
1680
RLJ Lodging Trust
RLJ
$1.87B
| $946K | ﹤0.01% |
57,709
+54,715
| +1,827% | +$1.06M |
|
1681
CALL
MPLX
MPLX
$59.5B
| $945K | ﹤0.01% |
312
+194
| +164% | +$6.48K |
|
|
PTR
1682
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $945K | ﹤0.01% |
15,356
+13,801
| +888% | +$988K |
|
1683
PUT
Helen of Troy
HELE
$663M
| $944K | ﹤0.01% |
72
-47
| -39% | -$6.17K |
|
1684
PUT
Ryder
R
$10.3B
| $943K | ﹤0.01% |
196
+72
| +58% | +$4.13K |
|
|
SHPG
1685
DELISTED
Shire pic
SHPG
| $943K | ﹤0.01% |
+5,420
| New | +$948K |
|
|
EGRX
1686
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $940K | ﹤0.01% |
23,341
+20,966
| +883% | +$1.08M |
|
|
AGN
1687
DELISTED
Allergan plc
AGN
| $940K | ﹤0.01% |
7,040
+5,087
| +260% | +$834K |
|
1688
Ascendis Pharma A/S
ASND
$16.7B
| $939K | ﹤0.01% |
+14,993
| New | +$942K |
|
|
HOLX
1689
DELISTED
Hologic
HOLX
| $938K | ﹤0.01% |
22,844
+18,674
| +448% | +$766K |
|
1690
CALL
Lands' End
LE
$361M
| $937K | ﹤0.01% |
660
+476
| +259% | +$7.72K |
|
|
TLRD
1691
CALL
DELISTED
Tailored Brands, Inc.
TLRD
| $937K | ﹤0.01% |
687
+340
| +98% | +$7K |
|
1692
Wolfspeed
WOLF
$1.2B
| $936K | ﹤0.01% |
21,885
-25,523
| -54% | -$1.04M |
|
|
WUBA
1693
CALL
DELISTED
58.com Inc
WUBA
| $932K | ﹤0.01% |
172
-68
| -28% | -$4.15K |
|
|
QLTB
1694
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $932K | ﹤0.01% |
+93
| New | +$932K |
|
1695
PUT
Acadia Pharmaceuticals
ACAD
$4.25B
| $931K | ﹤0.01% |
576
+318
| +123% | +$6.17K |
|
1696
Energy Transfer Partners
ET
$70.1B
| $926K | ﹤0.01% |
70,112
+47,902
| +216% | +$728K |
|
1697
CALL
GameStop
GME
$9.5B
| $926K | ﹤0.01% |
2,936
+336
| +13% | +$1.18K |
|
1698
CALL
Reinsurance Group of America
RGA
$15.7B
| $925K | ﹤0.01% |
66
| – | – |
|
1699
CALL
Agilent Technologies
A
$39.1B
| $924K | ﹤0.01% |
137
-892
| -87% | -$60K |
|
1700
CALL
H&R Block
HRB
$5.18B
| $918K | ﹤0.01% |
362
+54
| +18% | +$1.44K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.