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 | |
|---|---|---|---|---|---|---|
476
Caesars Entertainment
CZR
$6.1B
| $741K | 0.03% |
+37,059
| New | +$741K |
|
477
Pultegroup
PHM
$24.1B
| $741K | 0.03% |
+30,238
| New | +$706K |
|
|
WFM
478
CALL
DELISTED
Whole Foods Market Inc
WFM
| $740K | 0.03% |
9,187
+7,731
| +531% | +$282K |
|
479
Eversource Energy
ES
$28B
| $738K | 0.03% |
12,171
-3,132
| -20% | -$190K |
|
|
SAGE
480
DELISTED
Sage Therapeutics
SAGE
| $737K | 0.03% |
9,258
+7,812
| +540% | +$565K |
|
481
Energizer
ENR
$1.4B
| $736K | 0.03% |
15,327
+3,187
| +26% | +$173K |
|
482
PUT
Johnson & Johnson
JNJ
$615B
| $734K | 0.03% |
6,121
+208
| +4% | +$26.5K |
|
483
ICICI Bank
IBN
$106B
| $733K | 0.03% |
81,728
+9,863
| +14% | +$83.4K |
|
484
ASML
ASML
$692B
| $732K | 0.03% |
5,619
-16,291
| -74% | -$2.16M |
|
485
CALL
Walmart Inc
WMT
$870B
| $724K | 0.03% |
14,853
+1,683
| +13% | +$42.7K |
|
486
Editas Medicine
EDIT
$427M
| $720K | 0.03% |
42,930
+32,108
| +297% | +$579K |
|
|
ABCO
487
DELISTED
Advisory Board Co
ABCO
| $720K | 0.03% |
13,989
+9,443
| +208% | +$473K |
|
488
CALL
Ollie's Bargain Outlet
OLLI
$4.02B
| $719K | 0.03% |
587
-36
| -6% | -$1.41K |
|
489
Hartford Financial Services
HIG
$38.6B
| $718K | 0.03% |
13,661
-14,511
| -52% | -$719K |
|
490
CALL
Phillips 66
PSX
$84.8B
| $718K | 0.03% |
1,624
+201
| +14% | +$15.8K |
|
491
Churchill Downs
CHDN
$5.72B
| $716K | 0.03% |
23,448
+14,076
| +150% | +$399K |
|
492
PUT
Verizon
VZ
$185B
| $712K | 0.03% |
2,949
-728
| -20% | -$33.9K |
|
493
PUT
Wynn Resorts
WYNN
$9.79B
| $712K | 0.03% |
3,397
+1,121
| +49% | +$141K |
|
|
PTLA
494
CALL
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $711K | 0.03% |
672
+442
| +192% | +$17.7K |
|
495
PUT
Twilio
TWLO
$27.8B
| $710K | 0.03% |
1,554
-604
| -28% | -$16.5K |
|
|
NEX
496
DELISTED
NexTier Oilfield Solutions Inc.
NEX
| $709K | 0.03% |
+44,331
| New | +$653K |
|
|
LVNTA
497
CALL
DELISTED
Liberty Interactive Corporation Series A Liberty Ventures
LVNTA
| $709K | 0.03% |
1,096
-89
| -8% | -$4.66K |
|
498
PUT
iShares Morningstar Value ETF
ILCV
$1.3B
| $707K | 0.03% |
12,980
-112
| -0.9% | -$5.34K |
|
499
CALL
Coca-Cola
KO
$354B
| $705K | 0.03% |
3,953
-1,517
| -28% | -$67K |
|
|
JO
500
DELISTED
iPath Bloomberg Coffee Subindex Total Return ETN due June 24, 2038
JO
| $704K | 0.03% |
42,118
+337
| +0.8% | +$6.04K |
|
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.