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 |
CELG
Celgene Corp
CELG
|
+$31.6M |
| 2 |
Citigroup
C
|
+$19.5M |
| 3 |
AGN
Allergan plc
AGN
|
+$18.4M |
| 4 |
Baidu
BIDU
|
+$18M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$81.3M |
| 2 |
NVIDIA
NVDA
|
+$60.2M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$48.2M |
| 4 |
Apple
AAPL
|
+$48.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$31.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 11.27% |
| 2 | Technology | 10.64% |
| 3 | Healthcare | 7.06% |
| 4 | Communication Services | 6.92% |
| 5 | Industrials | 5.66% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1551
CALL
Cognizant
CTSH
$21.5B
| $139K | 0.01% |
885
+481
| +119% | +$35.2K |
|
|
GOOS
1552
CALL
Canada Goose Holdings
GOOS
$868M
| $139K | 0.01% |
165
-25
| -13% | -$614 |
|
1553
CALL
Intercontinental Exchange
ICE
$82.4B
| $139K | 0.01% |
355
+313
| +745% | +$21.5K |
|
1554
CALL
JB Hunt Transport Services
JBHT
$27.1B
| $139K | 0.01% |
200
+111
| +125% | +$12K |
|
1555
Vanguard Mid-Cap Value ETF
VOE
$23.7B
| $139K | 0.01% |
+1,254
| New | +$136K |
|
|
PVG
1556
CALL
DELISTED
PRETIUM RESOURCES INC.
PVG
| $139K | 0.01% |
657
-283
| -30% | -$3.08K |
|
1557
CALL
Colgate-Palmolive
CL
$72.6B
| $138K | 0.01% |
700
-226
| -24% | -$16.5K |
|
|
FARO
1558
DELISTED
Faro Technologies
FARO
| $138K | 0.01% |
2,943
+2,227
| +311% | +$104K |
|
1559
iShares Select U.S. REIT ETF
ICF
$2.12B
| $138K | 0.01% |
2,734
+2,558
| +1,453% | +$130K |
|
1560
Service Corp International
SCI
$11.4B
| $138K | 0.01% |
3,709
-25,502
| -87% | -$913K |
|
1561
Chord Energy
CHRD
$7.79B
| $137K | 0.01% |
16,309
+12,955
| +386% | +$119K |
|
1562
PUT
Ciena
CIEN
$55.3B
| $137K | 0.01% |
503
+61
| +14% | +$1.29K |
|
1563
PUT
Cirrus Logic
CRUS
$6.74B
| $137K | 0.01% |
283
-70
| -20% | -$3.78K |
|
1564
Liberty Latin America Class C
LILAK
$1.5B
| $137K | 0.01% |
+8,050
| New | +$151K |
|
1565
CALL
Petrobras
PBR
$121B
| $137K | 0.01% |
2,136
+1,617
| +312% | +$16.5K |
|
1566
PUT
Precigen
PGEN
$1.93B
| $137K | 0.01% |
197
-394
| -67% | -$5.87K |
|
|
TTM
1567
DELISTED
Tata Motors Limited
TTM
| $137K | 0.01% |
4,148
-42,514
| -91% | -$1.37M |
|
1568
Mistras Group
MG
$492M
| $136K | 0.01% |
+5,824
| New | +$127K |
|
1569
SS&C Technologies
SSNC
$17.8B
| $136K | 0.01% |
+3,377
| New | +$138K |
|
1570
United Parks & Resorts
PRKS
$2.11B
| $136K | 0.01% |
+10,028
| New | +$125K |
|
|
NEPT
1571
DELISTED
Neptune Wellness Solutions Inc. Ordinary Shares
NEPT
| $136K | 0.01% |
+41
| New | +$74.4K |
|
|
USG
1572
CALL
DELISTED
Usg
USG
| $136K | 0.01% |
374
+55
| +17% | +$1.93K |
|
1573
Calix
CALX
$2.3B
| $135K | 0.01% |
+22,816
| New | +$138K |
|
1574
CALL
Etsy
ETSY
$7.65B
| $135K | 0.01% |
318
-33
| -9% | -$582 |
|
|
CRESY
1575
Cresud
CRESY
$794M
| $134K | 0.01% |
6,781
+1,589
| +31% | +$29.7K |
|
Similar funds
Simplex Trading's Q4 2017 Portfolio in Review
As of Q4 2017, Simplex Trading held 7,407 positions worth $2.32B, down 5.1% from $2.45B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading withdrew a net $315M in Q4 2017, closing 1,460 positions and reducing 2,239 holdings. Its most notable exit was iShares 20+ Year Treasury Bond ETF, an estimated $21.1M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 11% of assets, down from 14% a quarter earlier, followed by Technology and Healthcare.
Against the trend, Simplex Trading opened a new position in Celgene Corp worth $29.2M.
- Simplex Trading's largest Q4 2017 buy was Celgene Corp: 280,194 shares worth $29.2M.
- Simplex Trading added most to Baidu in Q4 2017, an estimated $18M increase.
- Simplex Trading's biggest Q4 2017 reduction was Amazon, cutting an estimated $81.3M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q4 2017, selling an estimated $21.1M.
- Simplex Trading's ten largest holdings make up 17% of its $2.32B portfolio in Q4 2017.
- Simplex Trading opened 1,548 new positions and closed 1,460 in Q4 2017.
- Simplex Trading's portfolio value fell 5.1% quarter-over-quarter to $2.32B.
Based on Simplex Trading's 13F filing for Q4 2017, filed 10 Jan 2018.