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 | |
|---|---|---|---|---|---|---|
576
New Oriental
EDU
$7.75B
| $582K | 0.03% |
8,266
+944
| +13% | +$64.8K |
|
577
VanEck Gold Miners ETF
GDX
$23.4B
| $579K | 0.03% |
26,245
-125,724
| -83% | -$2.86M |
|
578
CALL
LendingTree
TREE
$578M
| $576K | 0.03% |
210
+185
| +740% | +$27.8K |
|
579
PUT
Signet Jewelers
SIG
$3.52B
| $573K | 0.02% |
755
+168
| +29% | +$10.3K |
|
580
eHealth
EHTH
$44.8M
| $572K | 0.02% |
30,429
+12,640
| +71% | +$202K |
|
581
PUT
JD.com
JD
$40.7B
| $572K | 0.02% |
4,221
+2,036
| +93% | +$76.8K |
|
582
CALL
CVS Health
CVS
$138B
| $569K | 0.02% |
3,360
-82
| -2% | -$6.47K |
|
|
SLCA
583
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $569K | 0.02% |
16,034
-877
| -5% | -$34.5K |
|
584
IMAX
IMAX
$2.16B
| $568K | 0.02% |
+25,834
| New | +$725K |
|
585
Willis Towers Watson
WTW
$27.1B
| $565K | 0.02% |
3,887
+3,847
| +9,618% | +$537K |
|
|
BCR
586
DELISTED
CR Bard Inc.
BCR
| $565K | 0.02% |
1,790
+1,601
| +847% | +$475K |
|
|
CALA
587
DELISTED
Calithera Biosciences, Inc
CALA
| $564K | 0.02% |
1,901
-257
| -12% | -$68.7K |
|
588
CALL
Waste Management
WM
$94.9B
| $563K | 0.02% |
918
-214
| -19% | -$15.6K |
|
|
REV
589
DELISTED
Revlon, Inc.
REV
| $563K | 0.02% |
23,760
+20,916
| +735% | +$475K |
|
590
Everest Group
EG
$14.8B
| $561K | 0.02% |
+2,204
| New | +$544K |
|
|
FMSA
591
DELISTED
Fairmount Santrol Holdings Inc.
FMSA
| $561K | 0.02% |
143,899
+120,012
| +502% | +$622K |
|
|
AFSI
592
DELISTED
AmTrust Financial Services, Inc.
AFSI
| $560K | 0.02% |
37,017
+869
| +2% | +$12.8K |
|
593
CALL
Applied Optoelectronics
AAOI
$8.87B
| $556K | 0.02% |
1,255
+1,097
| +694% | +$64.1K |
|
|
ATVI
594
DELISTED
Activision Blizzard
ATVI
| $556K | 0.02% |
9,663
-44,713
| -82% | -$2.47M |
|
595
CALL
Gen Digital
GEN
$15.4B
| $551K | 0.02% |
3,039
+1,528
| +101% | +$46.2K |
|
|
HTZ
596
PUT
DELISTED
Hertz Global Holdings, Inc.
HTZ
| $549K | 0.02% |
2,315
-76
| -3% | -$817 |
|
597
Zoetis
ZTS
$31.1B
| $548K | 0.02% |
8,797
-5,871
| -40% | -$347K |
|
598
Angi Inc
ANGI
$234M
| $547K | 0.02% |
+4,284
| New | +$423K |
|
|
BLUE
599
CALL
DELISTED
bluebird bio
BLUE
| $546K | 0.02% |
30
+18
| +150% | +$21.7K |
|
600
PUT
Nabors Industries
NBR
$1.26B
| $546K | 0.02% |
57
+45
| +375% | +$22.7K |
|
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.