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 | |
|---|---|---|---|---|---|---|
451
PUT
AutoZone
AZO
$48.5B
| $793K | 0.03% |
175
-110
| -39% | -$71.6K |
|
452
PUT
Colgate-Palmolive
CL
$73.3B
| $789K | 0.03% |
5,153
+2,388
| +86% | +$177K |
|
453
Under Armour Class C
UA
$3.02B
| $789K | 0.03% |
39,152
-18,219
| -32% | -$343K |
|
454
Conduent
CNDT
$234M
| $787K | 0.03% |
49,397
+48,406
| +4,885% | +$793K |
|
455
Spectrum Brands
SPB
$2.05B
| $787K | 0.03% |
6,301
+5,196
| +470% | +$697K |
|
456
Helmerich & Payne
HP
$3.52B
| $784K | 0.03% |
14,440
-6,950
| -32% | -$408K |
|
457
CALL
Thermo Fisher Scientific
TMO
$196B
| $782K | 0.03% |
288
-121
| -30% | -$20.3K |
|
458
PUT
Wells Fargo
WFC
$262B
| $782K | 0.03% |
6,702
-3,308
| -33% | -$177K |
|
459
Signet Jewelers
SIG
$3.52B
| $780K | 0.03% |
12,334
-44,450
| -78% | -$2.73M |
|
460
CALL
Merck
MRK
$315B
| $778K | 0.03% |
5,752
-3,389
| -37% | -$206K |
|
461
Urban Outfitters
URBN
$6.31B
| $777K | 0.03% |
41,956
-21,128
| -33% | -$435K |
|
|
NFX
462
DELISTED
Newfield Exploration
NFX
| $775K | 0.03% |
+27,256
| New | +$898K |
|
463
Chipotle Mexican Grill
CMG
$41.3B
| $770K | 0.03% |
+92,600
| New | +$859K |
|
|
NETI
464
DELISTED
Eneti Inc.
NETI
| $767K | 0.03% |
+11,633
| New | +$763K |
|
465
Etsy
ETSY
$7.64B
| $766K | 0.03% |
51,119
+33,809
| +195% | +$420K |
|
466
CALL
American Express
AXP
$238B
| $765K | 0.03% |
1,452
-76
| -5% | -$6.01K |
|
467
CALL
AB InBev
BUD
$161B
| $759K | 0.03% |
1,581
+849
| +116% | +$97.2K |
|
468
Direxion Daily Energy Bull 2X ETF
ERX
$245M
| $759K | 0.03% |
3,031
+1,674
| +123% | +$467K |
|
|
MDRX
469
DELISTED
Veradigm Inc. Common Stock
MDRX
| $758K | 0.03% |
+59,476
| New | +$722K |
|
470
Exelixis
EXEL
$13.8B
| $757K | 0.03% |
+30,738
| New | +$650K |
|
471
Marvell Technology
MRVL
$189B
| $755K | 0.03% |
+45,714
| New | +$739K |
|
472
PUT
Starbucks
SBUX
$119B
| $752K | 0.03% |
4,627
-1,747
| -27% | -$106K |
|
|
SIOX
473
DELISTED
Sio Gene Therapies Inc. Common Stock
SIOX
| $749K | 0.03% |
4,038
-405
| -9% | -$71K |
|
474
CALL
Align Technology
ALGN
$12.4B
| $744K | 0.03% |
349
+24
| +7% | +$3.25K |
|
|
WUBA
475
DELISTED
58.com Inc
WUBA
| $742K | 0.03% |
+16,829
| New | +$693K |
|
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.