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 | |
|---|---|---|---|---|---|---|
751
PUT
United Airlines
UAL
$38.1B
| $418K | 0.02% |
3,451
+1,192
| +53% | +$90K |
|
|
ICPT
752
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $417K | 0.02% |
3,448
-1,999
| -37% | -$232K |
|
|
MRO
753
DELISTED
Marathon Oil Corporation
MRO
| $416K | 0.02% |
+35,124
| New | +$491K |
|
754
PUT
Deere & Co
DE
$164B
| $415K | 0.02% |
2,761
+691
| +33% | +$81.1K |
|
755
Star Bulk Carriers
SBLK
$2.99B
| $415K | 0.02% |
+42,264
| New | +$393K |
|
756
PUT
Lockheed Martin
LMT
$119B
| $414K | 0.02% |
631
+189
| +43% | +$51.9K |
|
757
PUT
Analog Devices
ADI
$188B
| $413K | 0.02% |
1,366
+1,037
| +315% | +$82.4K |
|
758
Bread Financial
BFH
$4.12B
| $413K | 0.02% |
+2,016
| New | +$401K |
|
759
CALL
Stratasys
SSYS
$713M
| $413K | 0.02% |
558
-35
| -6% | -$901 |
|
760
MarketAxess Holdings
MKTX
$4.01B
| $411K | 0.02% |
+2,047
| New | +$392K |
|
|
RDS.A
761
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $411K | 0.02% |
1,843
-918
| -33% | -$49.2K |
|
762
Franklin Covey
FC
$241M
| $410K | 0.02% |
21,261
+18,877
| +792% | +$389K |
|
763
PUT
MGM Resorts International
MGM
$11.6B
| $410K | 0.02% |
1,798
-440
| -20% | -$13.6K |
|
764
CALL
Colgate-Palmolive
CL
$73.3B
| $409K | 0.02% |
3,688
+1,265
| +52% | +$93.9K |
|
|
POT
765
PUT
DELISTED
Potash Corp Of Saskatchewan
POT
| $408K | 0.02% |
946
-1,561
| -62% | -$25.8K |
|
|
ANDV
766
CALL
DELISTED
Andeavor
ANDV
| $407K | 0.02% |
1,020
-34
| -3% | -$2.87K |
|
|
TTM.RT
767
PUT
DELISTED
TATA MOTORS LIMITED RT PUR ADR
TTM.RT
| $407K | 0.02% |
987
+469
| +91% | +$193K |
|
768
Aecom
ACM
$8.67B
| $406K | 0.02% |
+12,572
| New | +$417K |
|
|
NYRT
769
DELISTED
New York REIT, Inc.
NYRT
| $406K | 0.02% |
4,705
+4,422
| +1,563% | +$401K |
|
770
Carriage Services
CSV
$587M
| $405K | 0.02% |
15,053
-8,125
| -35% | -$218K |
|
|
FL
771
PUT
DELISTED
Foot Locker
FL
| $404K | 0.02% |
780
-170
| -18% | -$11K |
|
772
McKesson
MCK
$95.3B
| $402K | 0.02% |
2,448
+17
| +0.7% | +$2.58K |
|
|
TWTR
773
PUT
DELISTED
Twitter, Inc.
TWTR
| $402K | 0.02% |
2,685
-2,935
| -52% | -$50K |
|
774
ProShares UltraShort S&P500
SDS
$397M
| $401K | 0.02% |
+317
| New | +$413K |
|
775
Teck Resources
TECK
$28B
| $401K | 0.02% |
23,194
-4,525
| -16% | -$86.6K |
|
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.