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
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CTXS
1676
CALL
DELISTED
Citrix Systems Inc
CTXS
| $110K | ﹤0.01% |
475
+8
| +2% | +$663 |
|
|
BPL
1677
PUT
DELISTED
Buckeye Partners, L.P.
BPL
| $110K | ﹤0.01% |
242
-138
| -36% | -$9.07K |
|
|
LQ
1678
DELISTED
La Quinta Holdings Inc.
LQ
| $110K | ﹤0.01% |
7,507
-688
| -8% | -$9.71K |
|
1679
CALL
Delek US
DK
$3.87B
| $109K | ﹤0.01% |
624
-263
| -30% | -$6.49K |
|
1680
PUT
Evolent Health
EVH
$475M
| $109K | ﹤0.01% |
660
-94
| -12% | -$2.26K |
|
1681
Fastenal
FAST
$54B
| $109K | ﹤0.01% |
+10,060
| New | +$113K |
|
1682
CALL
KKR & Co
KKR
$89.2B
| $109K | ﹤0.01% |
752
+275
| +58% | +$5.03K |
|
1683
NovoCure
NVCR
$2.04B
| $109K | ﹤0.01% |
+6,332
| New | +$81.7K |
|
1684
CALL
Target
TGT
$62.1B
| $109K | ﹤0.01% |
2,192
+377
| +21% | +$20.6K |
|
|
AVID
1685
DELISTED
Avid Technology Inc
AVID
| $109K | ﹤0.01% |
20,885
+10,858
| +108% | +$55.9K |
|
|
RAD
1686
CALL
DELISTED
Rite Aid Corporation
RAD
| $109K | ﹤0.01% |
344
+158
| +85% | +$11.9K |
|
|
XONE
1687
DELISTED
The ExOne Company
XONE
| $109K | ﹤0.01% |
9,556
+9,268
| +3,218% | +$110K |
|
1688
Applied Optoelectronics
AAOI
$8.04B
| $108K | ﹤0.01% |
1,752
-22,017
| -93% | -$1.29M |
|
1689
PUT
Dillards
DDS
$8.87B
| $108K | ﹤0.01% |
557
+381
| +216% | +$20.1K |
|
1690
CALL
ImmunityBio
IBRX
$7.44B
| $108K | ﹤0.01% |
+404
| New | +$1.75K |
|
1691
PUT
Liberty Latin America Class C
LILAK
$1.5B
| $108K | ﹤0.01% |
626
+237
| +61% | +$4.35K |
|
1692
CALL
NextEra Energy
NEE
$187B
| $108K | ﹤0.01% |
1,312
+868
| +195% | +$29.7K |
|
1693
Ooma
OOMA
$550M
| $108K | ﹤0.01% |
13,542
+11,954
| +753% | +$122K |
|
1694
CALL
Qorvo
QRVO
$7.63B
| $108K | ﹤0.01% |
302
-256
| -46% | -$18.3K |
|
|
1695
PUT
Qorvo
QRVO
$7.63B
| $108K | ﹤0.01% |
462
-246
| -35% | -$17.6K |
|
1696
PUT
WIX.com
WIX
$2.15B
| $108K | ﹤0.01% |
+346
| New | +$25.9K |
|
1697
CALL
Best Buy
BBY
$18B
| $107K | ﹤0.01% |
604
-430
| -42% | -$23K |
|
|
BLD
1698
CALL
DELISTED
TopBuild
BLD
| $107K | ﹤0.01% |
156
+5
| +3% | +$256 |
|
|
BZUN
1699
CALL
Baozun
BZUN
$143M
| $107K | ﹤0.01% |
670
+440
| +191% | +$8.34K |
|
1700
CALL
Lennar Class B
LEN.B
$20B
| $107K | ﹤0.01% |
143
-107
| -43% | -$4.33K |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.