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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
XXIA
1276
DELISTED
Ixia
XXIA
| $142K | 0.01% |
8,875
+8,385
| +1,711% | +$116K |
|
1277
CALL
Acadia Pharmaceuticals
ACAD
$4.25B
| $141K | 0.01% |
1,139
+564
| +98% | +$14.9K |
|
1278
PUT
AutoZone
AZO
$48.3B
| $141K | 0.01% |
191
-62
| -25% | -$47.7K |
|
|
LADR
1279
Ladder Capital
LADR
$1.25B
| $141K | 0.01% |
10,346
+10,206
| +7,290% | +$137K |
|
1280
Gibraltar Industries
ROCK
$1.34B
| $141K | 0.01% |
3,390
+698
| +26% | +$28.8K |
|
|
LUMO
1281
DELISTED
Lumos Pharma, Inc. Common Stock
LUMO
| $141K | 0.01% |
+1,526
| New | +$172K |
|
|
HNP
1282
DELISTED
Huaneng Power Intl, Inc.
HNP
| $141K | 0.01% |
5,417
-3,589
| -40% | -$89.1K |
|
|
SINA
1283
PUT
DELISTED
Sina Corp
SINA
| $141K | 0.01% |
616
+76
| +14% | +$5.45K |
|
|
ALR
1284
CALL
DELISTED
Alere Inc
ALR
| $141K | 0.01% |
627
+545
| +665% | +$22.1K |
|
1285
PUT
Cal-Maine
CALM
$4.28B
| $140K | 0.01% |
452
+311
| +221% | +$12.4K |
|
1286
CSX Corp
CSX
$98.6B
| $140K | 0.01% |
+11,760
| New | +$132K |
|
1287
Edwards Lifesciences
EW
$47.6B
| $140K | 0.01% |
4,512
+3,753
| +494% | +$122K |
|
1288
Neurocrine Biosciences
NBIX
$17.7B
| $140K | 0.01% |
+3,618
| New | +$164K |
|
1289
CALL
Palo Alto Networks
PANW
$264B
| $140K | 0.01% |
3,522
-1,830
| -34% | -$43.8K |
|
|
SDRL
1290
CALL
DELISTED
Seadrill Limited Common Stock
SDRL
| $140K | 0.01% |
10
+5
| +100% | +$3.66K |
|
|
TERP
1291
PUT
DELISTED
TerraForm Power, Inc
TERP
| $140K | 0.01% |
717
-111
| -13% | -$1.44K |
|
1292
CALL
Alliance Resource Partners
ARLP
$3.18B
| $139K | 0.01% |
508
+379
| +294% | +$8.89K |
|
|
FITB
1293
CALL
Fifth Third Bancorp
FITB
$52B
| $139K | 0.01% |
830
+567
| +216% | +$13.6K |
|
1294
PUT
Occidental Petroleum
OXY
$57B
| $139K | 0.01% |
685
-1,316
| -66% | -$93.5K |
|
1295
CALL
Bank OZK
OZK
$5.49B
| $139K | 0.01% |
116
-238
| -67% | -$10.6K |
|
1296
CALL
Target
TGT
$62.1B
| $139K | 0.01% |
2,861
+761
| +36% | +$55.1K |
|
1297
PUT
Vodafone
VOD
$34.9B
| $139K | 0.01% |
1,071
-90
| -8% | -$2.37K |
|
|
SWC
1298
DELISTED
Stillwater Mining Co
SWC
| $139K | 0.01% |
8,681
+8,442
| +3,532% | +$121K |
|
1299
CALL
Cencora
COR
$60.3B
| $138K | 0.01% |
577
+390
| +209% | +$30.4K |
|
|
HEP
1300
DELISTED
Holly Energy Partners, L.P.
HEP
| $138K | 0.01% |
4,315
+4,288
| +15,881% | +$139K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.