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 |
Alphabet (Google) Class C
GOOG
|
+$40.1M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.5M |
| 3 |
Alibaba
BABA
|
+$10.5M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 5 |
Intel
INTC
|
+$9.83M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$35.7M |
| 2 |
Gilead Sciences
GILD
|
+$32.3M |
| 3 |
Amazon
AMZN
|
+$29M |
| 4 |
Booking.com
BKNG
|
+$28.4M |
| 5 |
Baidu
BIDU
|
+$13.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 7.76% |
| 2 | Consumer Discretionary | 7.62% |
| 3 | Healthcare | 7.24% |
| 4 | Technology | 6.95% |
| 5 | Financials | 4.83% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1376
Elevance Health
ELV
$81.9B
| $65K | 0.01% |
425
+126
| +42% | +$17.9K |
|
1377
Fortinet
FTNT
$112B
| $65K | 0.01% |
9,335
+6,235
| +201% | +$40.7K |
|
1378
Jefferies Financial Group
JEF
$12.9B
| $65K | 0.01% |
3,274
-6,456
| -66% | -$133K |
|
1379
PUT
Norfolk Southern
NSC
$78.8B
| $65K | 0.01% |
92
+43
| +88% | +$4.6K |
|
1380
CALL
PTC Therapeutics
PTCT
$6.37B
| $65K | 0.01% |
+85
| New | +$5.19K |
|
1381
First Trust Cloud Computing ETF
SKYY
$2.74B
| $65K | 0.01% |
+2,225
| New | +$64K |
|
1382
Teekay Tankers
TNK
$2.63B
| $65K | 0.01% |
+1,418
| New | +$64.4K |
|
1383
CALL
Texas Instruments
TXN
$255B
| $65K | 0.01% |
132
+60
| +83% | +$3.37K |
|
1384
PUT
Veeva Systems
VEEV
$30.3B
| $65K | 0.01% |
236
+143
| +154% | +$4.03K |
|
|
ZNGA
1385
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $65K | 0.01% |
22,902
+21,402
| +1,427% | +$55.2K |
|
|
PFPT
1386
DELISTED
Proofpoint, Inc.
PFPT
| $65K | 0.01% |
+1,111
| New | +$59.8K |
|
1387
A.O. Smith
AOS
$8.38B
| $64K | 0.01% |
+1,954
| New | +$59.4K |
|
1388
PUT
Danaher
DHR
$135B
| $64K | 0.01% |
323
+67
| +26% | +$3.84K |
|
1389
CALL
Home Depot
HD
$332B
| $64K | 0.01% |
264
-59
| -18% | -$6.51K |
|
1390
CALL
Intercontinental Exchange
ICE
$82.4B
| $64K | 0.01% |
180
-120
| -40% | -$5.41K |
|
1391
PUT
Lam Research
LRCX
$382B
| $64K | 0.01% |
670
+80
| +14% | +$633 |
|
1392
Abbott
ABT
$180B
| $63K | 0.01% |
+1,375
| New | +$63.1K |
|
1393
CALL
Alaska Air
ALK
$5.15B
| $63K | 0.01% |
+91
| New | +$5.91K |
|
1394
CALL
American Tower
AMT
$77.7B
| $63K | 0.01% |
155
+46
| +42% | +$4.47K |
|
1395
PUT
Honeywell
HON
$77B
| $63K | 0.01% |
224
+191
| +579% | +$17.5K |
|
1396
PUT
Icahn Enterprises
IEP
$5.17B
| $63K | 0.01% |
31
+16
| +107% | +$1.51K |
|
1397
CALL
Magna International
MGA
$17.9B
| $63K | 0.01% |
177
+89
| +101% | +$4.58K |
|
1398
PUT
Annaly Capital Management
NLY
$16.9B
| $63K | 0.01% |
+35
| New | +$1.49K |
|
|
SWN
1399
PUT
DELISTED
Southwestern Energy Company
SWN
| $63K | 0.01% |
239
-287
| -55% | -$7.13K |
|
|
PBFX
1400
DELISTED
PBF LOGISTICS LP
PBFX
| $63K | 0.01% |
2,802
+1,349
| +93% | +$30.5K |
|
Similar funds
Simplex Trading's Q1 2015 Portfolio in Review
As of Q1 2015, Simplex Trading held 6,670 positions worth $860M, up 4.2% from $826M the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q1 2015 filing shows 1,973 new, 1,386 increased, 1,513 reduced and 1,643 closed positions. Its largest new stake was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M. The largest sale was Apple, an estimated $35.7M.
By sector, the portfolio is most concentrated in Communication Services at 7.8% of assets, up from 4.8% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q1 2015 buy was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M.
- Simplex Trading added most to Alibaba in Q1 2015, an estimated $10.5M increase.
- Simplex Trading's biggest Q1 2015 reduction was Apple, cutting an estimated $35.7M.
- Simplex Trading fully exited Amazon in Q1 2015, selling an estimated $29M.
- Simplex Trading's ten largest holdings make up 15% of its $860M portfolio in Q1 2015.
- Simplex Trading opened 1,973 new positions and closed 1,643 in Q1 2015.
- Simplex Trading's portfolio value rose 4.2% quarter-over-quarter to $860M.
Based on Simplex Trading's 13F filing for Q1 2015, filed 21 Apr 2015.