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 | |
|---|---|---|---|---|---|---|
1276
Kratos Defense & Security Solutions
KTOS
$9.01B
| $177K | 0.01% |
14,919
-10,015
| -40% | -$95.6K |
|
1277
CALL
Eli Lilly
LLY
$1.06T
| $177K | 0.01% |
861
-953
| -53% | -$77.7K |
|
1278
CALL
Macy's
M
$6.13B
| $177K | 0.01% |
3,015
+1,637
| +119% | +$41.9K |
|
1279
Teucrium Wheat Fund
WEAT
$314M
| $177K | 0.01% |
4,539
+3,767
| +488% | +$131K |
|
|
AIV
1280
Aimco
AIV
$383M
| $176K | 0.01% |
+30,898
| New | +$180K |
|
1281
PUT
Duke Energy
DUK
$101B
| $176K | 0.01% |
465
-164
| -26% | -$13.8K |
|
1282
Enpro
NPO
$7.1B
| $176K | 0.01% |
2,470
-2,375
| -49% | -$164K |
|
1283
NETGEAR
NTGR
$680M
| $176K | 0.01% |
4,089
-2,406
| -37% | -$110K |
|
1284
Tesla
TSLA
$1.22T
| $176K | 0.01% |
7,335
-17,415
| -70% | -$383K |
|
1285
V2X
VVX
$2.63B
| $176K | 0.01% |
5,450
+3,894
| +250% | +$108K |
|
|
MTL
1286
DELISTED
Mechel PAO American Depository Shares, each representing two ordinary shares (ADSs)
MTL
| $176K | 0.01% |
+38,024
| New | +$198K |
|
1287
Comstock Resources
CRK
$4.01B
| $175K | 0.01% |
24,860
-29,224
| -54% | -$233K |
|
1288
Global X Lithium & Battery Tech ETF
LIT
$1.5B
| $175K | 0.01% |
6,037
+2,164
| +56% | +$62.9K |
|
1289
PUT
Lumen
LUMN
$6.6B
| $175K | 0.01% |
1,028
-25
| -2% | -$628 |
|
|
CHK
1290
DELISTED
Chesapeake Energy Corporation
CHK
| $175K | 0.01% |
176
-54
| -23% | -$58K |
|
1291
CALL
Agilent Technologies
A
$39.1B
| $174K | 0.01% |
504
-92
| -15% | -$5.24K |
|
1292
PUT
Vornado Realty Trust
VNO
$7.51B
| $174K | 0.01% |
414
+155
| +60% | +$12K |
|
|
BEL
1293
DELISTED
Belmond Ltd.
BEL
| $174K | 0.01% |
13,088
+1,298
| +11% | +$16.3K |
|
1294
CALL
Apollo Global Management
APO
$70.3B
| $173K | 0.01% |
570
+189
| +50% | +$5.03K |
|
1295
Pegasystems
PEGA
$4.38B
| $173K | 0.01% |
5,960
-4,120
| -41% | -$109K |
|
1296
CALL
Procter & Gamble
PG
$342B
| $173K | 0.01% |
2,279
-683
| -23% | -$60.2K |
|
1297
CALL
Dollar Tree
DLTR
$23B
| $172K | 0.01% |
802
+3
| +0.4% | +$232 |
|
|
GOLD
1298
CALL
DELISTED
Randgold Resources Ltd
GOLD
| $172K | 0.01% |
792
+384
| +94% | +$35.1K |
|
|
1299
CALL
Duke Energy
DUK
$101B
| $171K | 0.01% |
1,347
+148
| +12% | +$12.4K |
|
1300
PUT
Puma Biotechnology
PBYI
$407M
| $171K | 0.01% |
529
+316
| +148% | +$17.7K |
|
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.